Re: [Pykaraoke-discuss] Welcome to the Pykaraoke-discuss mailing list

[Kelvin Lawson]

Could be: did you download the SDL_mixer sources and build them
yourself? Could be a version mismatch or similar. The instructions for
building that were written quite some time ago and something could
have changed.


On 28 May 2013 17:32, Conor Dowdall conordowdallm...@gmail.com wrote:
 No luck there Kelvin.. thanks for the suggestion.

 I see it starts with libc in the backtrace and moves on to libSDL_mixer...
 did I somehow mess up the SDL install with mp3 support???... I'm not too
 familiar with how backtraces work!

 Conor.


 *** glibc detected *** python: double free or corruption (out):
 0x021f6800 ***

 === Backtrace: =
 /lib64/libc.so.6[0x355ac7ca8e]
 /lib/libSDL_mixer-1.2.so.0[0x3af1e0cc13]
 /lib/libSDL_mixer-1.2.so.0[0x3af1e0b2a9]
 /lib/libSDL_mixer-1.2.so.0(Mix_OpenAudio+0x8d)[0x3af1e09b8d]
 /usr/lib64/python2.7/site-packages/pygame/mixer.so(+0x3050)[0x7fcf48be0050]
 /usr/lib64/python2.7/site-packages/pygame/mixer.so(+0x31d6)[0x7fcf48be01d6]
 /lib64/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x4a80)[0x35794dc370]

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Re: [Pykaraoke-discuss] Bug report

[Kelvin Lawson]

Hi Pietro,

Thanks, I have added this to the issues list at Github:
https://github.com/kelvinlawson/pykaraoke/issues/

Best regards,
Kelvin.

On 14 November 2011 17:41, Pietro Battiston m...@pietrobattiston.it wrote:

 Hello,

 there are some MIDI files (I can provide an example only privately,
 since they are not free) for which, when played, PyKaraoke only shows
 the error

 ERROR: Could not parse the MIDI file

 and then, in another MessageDialog, the error

 No lyrics in the track.

 Now, that would be fair to me... the only problem is that then,
 pykaraoke is stuck: not unresponsive, but it won't play any other file,
 and will print forever in the terminal:

 Traceback (most recent call last):
  File /usr/lib/pymodules/python2.7/pykaraoke.py, line 3815, in
 handleIdle
position = self.Player.GetPos()
  File /usr/lib/pymodules/python2.7/pykar.py, line 1072, in GetPos
if self.useMidiTimer:
 AttributeError: midPlayer instance has no attribute 'useMidiTimer'


 Interestingly, if I played some MIDI _before_ trying to play the faulty
 one, then in the background that will play again, but without showing
 the lyrics (and i will not be able to stop it in any way).

 You may think it is stupid to play faulty MIDI files, or MIDI files
 without lyrics... but when I have a huge library it's impossible to try
 all of them before, and then it's also annoying to have to restart the
 program (and loose the queue) any time a faulty one is chosen...

 Maybe an alternative fix could be to (optionally) run some validity
 check on MIDI files when refreshing the library?

 by the way, thanks for the nice app

 Pietro



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Re: [Pykaraoke-discuss] Bug report

[Kelvin Lawson]

Hi Pietro,

Yes I haven't updated the website / Sourceforge yet since the move from
Sourceforge to Github. The mailing list is still on Sourceforge but the
development repository and issue tracker are now on Github. Eventually I'll
get everything updated with this new information.

Thanks,
Kelvin.


On 15 November 2011 13:38, Pietro Battiston m...@pietrobattiston.it wrote:

 Il giorno mar, 15/11/2011 alle 08.56 +, Kelvin Lawson ha scritto:
  Hi Pietro,
 
 
  Thanks, I have added this to the issues list at Github:
  https://github.com/kelvinlawson/pykaraoke/issues/
 

 Maybe a link from
 http://kibosh.org/pykaraoke/development.php
 would be convenient?

 thanks

 Pietro


 
  Best regards,
  Kelvin.
 
  On 14 November 2011 17:41, Pietro Battiston m...@pietrobattiston.it
  wrote:
  Hello,
 
  there are some MIDI files (I can provide an example only
  privately,
  since they are not free) for which, when played, PyKaraoke
  only shows
  the error
 
  ERROR: Could not parse the MIDI file
 
  and then, in another MessageDialog, the error
 
  No lyrics in the track.
 
  Now, that would be fair to me... the only problem is that
  then,
  pykaraoke is stuck: not unresponsive, but it won't play any
  other file,
  and will print forever in the terminal:
 
  Traceback (most recent call last):
   File /usr/lib/pymodules/python2.7/pykaraoke.py, line 3815,
  in
  handleIdle
 position = self.Player.GetPos()
   File /usr/lib/pymodules/python2.7/pykar.py, line 1072, in
  GetPos
 if self.useMidiTimer:
  AttributeError: midPlayer instance has no attribute
  'useMidiTimer'
 
 
  Interestingly, if I played some MIDI _before_ trying to play
  the faulty
  one, then in the background that will play again, but without
  showing
  the lyrics (and i will not be able to stop it in any way).
 
  You may think it is stupid to play faulty MIDI files, or MIDI
  files
  without lyrics... but when I have a huge library it's
  impossible to try
  all of them before, and then it's also annoying to have to
  restart the
  program (and loose the queue) any time a faulty one is
  chosen...
 
  Maybe an alternative fix could be to (optionally) run some
  validity
  check on MIDI files when refreshing the library?
 
  by the way, thanks for the nice app
 
  Pietro
 
 
 
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[Pykaraoke-discuss] PyKaraoke Development

[Kelvin Lawson]

All,

If you are involved in developing for PyKaraoke, or you like trying out the
latest development code, please be aware that we have moved the source tree
to Github:
https://github.com/kelvinlawson/pykaraoke

Here you will also find a work-in-progress branch that is not quite ready
for release but contains some neat new features (pitch-shifting, lyrics
preview window for KJ hosts, fixes for international filenames). This is all
thanks to Paul Arnett and will hopefully make it into the main release code
soon:
https://github.com/kelvinlawson/pykaraoke/tree/gstreamer

Best regards,
Kelvin.
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Re: [Pykaraoke-discuss] no Add Songs button in Ubuntu Maverick Natty

[Kelvin Lawson]

Interesting links, thanks. Ubuntu have introduced a change which breaks the
menu bar on several applications. I'll see what happens when the dust
settles on those changes.

Kelvin.


On 12 January 2011 08:36, Jeffrey Katz jdkat...@gmail.com wrote:

 I found 2 temporary workarounds:

 export UBUNTU_MENUPROXY=0

 found  at http://ubuntuforums.org/showthread.php?t=1632239

 and, uninstalling appmenu-gtk

 found at
 http://www.techytalk.co.cc/2010/12/ubuntu-maverick-10-10-no-menu-bar-in-some-apps/


 On Tue, Jan 11, 2011 at 3:37 PM, Kelvin Lawson kelv...@users.sf.netwrote:

 Hi Jeffrey,

 Do you mean the Add new songs to database option from the File menu?
 Would you mind sending a screenshot please?

 Thanks,
 Kelvin.


 On 11 January 2011 23:31, Jeffrey Katz jdkat...@gmail.com wrote:

  With Ubuntu Maverick  Natty, updated to current, there is no Add
 Songs button visible.  Launching from the command line doesn't show any
 errors.  Building from source has the same problem as the debs in the
 depositories.  I've reported this at
 https://bugs.launchpad.net/ubuntu/+source/pykaraoke/+bug/701242.  Any
 idea which python/wx library is probably to blame?  Is there any chance you
 can provide a pykaraoke build with the dependent libraries included?  I'm
 using amd64 if that's relevant.


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Re: [Pykaraoke-discuss] no Add Songs button in Ubuntu Maverick Natty

[Kelvin Lawson]

Hi Jeffrey,

Do you mean the Add new songs to database option from the File menu? Would
you mind sending a screenshot please?

Thanks,
Kelvin.


On 11 January 2011 23:31, Jeffrey Katz jdkat...@gmail.com wrote:

 With Ubuntu Maverick  Natty, updated to current, there is no Add Songs
 button visible.  Launching from the command line doesn't show any errors.
 Building from source has the same problem as the debs in the depositories.
 I've reported this at
 https://bugs.launchpad.net/ubuntu/+source/pykaraoke/+bug/701242.  Any idea
 which python/wx library is probably to blame?  Is there any chance you can
 provide a pykaraoke build with the dependent libraries included?  I'm using
 amd64 if that's relevant.


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Re: [Pykaraoke-discuss] Filename encoding on Linux

[Kelvin Lawson]

Hi Matt,

Thanks for taking the time to submit a patch.

 I have attached a patch which converts all directory names to str
 objects before scanning them. It makes thing work here. I have not
 tested it out on other platforms, but I believe since I remain with
 str objects, all encoding issues should be effectively bypassed, so it
 should work everywhere.

This is actually how PyKaraoke used to behave but users with unicode
directory names found that the str() conversion made the scan fail.
The previous implementation (the same as yours) compared to the new
can be seen here:
http://pykaraoke.cvs.sourceforge.net/viewvc/pykaraoke/pykaraoke/pykdb.py?r1=1.35r2=1.36

This fixed scanning of folders with unicode names, and I confirmed it
to work on my machine, so I cannot reinstate the str() as is. Is there
an alternative patch that would work in both environments? Could it be
that the path needs to be encoded using the file system encoding for
example (fileList[i].encode(sys.getfilesystemencoding()))?

Thanks again for spending the time to dig into the sources, much appreciated.

Kelvin.

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Re: [Pykaraoke-discuss] pykaraoke windows developer

[Kelvin Lawson]

Hi Steve,

 Thanks for the quick response Kelvin.  I'm glad to hear that pykaraoke is
 still kicking.  I would definitely like to contribute back at least what we

It's still going, just at a slower pace now that the core karaoke
playback functionality is finished and stable. You may have seen that
I released v0.7.3 this week.

 the night I have more time than I know what to do with :)  I have a Vista 
 Win7 box and I've used pykaraoke enough that I think I could look over the
 Windows port.

That would be great thanks.

 My wife and I worked mainly on modifying the gui so that you could play a
 song while adding other songs.  When she was singing I couldn't look up
 another song without her video freezing while the gui was occupied.  I think
 it mainly comprised kicking off the video window in it's own thread.  Has
 something like this been worked on in the past?  Commit access btw would be

This would be useful. The player threads do make callbacks when songs
are completed, though, which is something to be aware of (i.e. may
need proper IPC between the GUI thread and the player thread). Which
reminds me: someone did report an issue with a multicore CPU on
Windows, which I suspected at the time was due to the callbacks
between the Pygame player and the GUI. What you have done there sounds
like it could be useful for that.

 great.  I'll probably throw the patch your way first anyway, but first
 things first I'll find my old code  setup pykaraoke on Vista  see how it
 goes.  I'll probably be taking baby steps contributing since my free time to
 code is pretty small.

No problem, anything you feel like contributing is appreciated.

Thanks,
Kelvin.


 As for other features, I do have some other ideas written in an email
 somewhere.  I'll try to find them  get back to you.

 Steve

 On Tue, May 4, 2010 at 4:29 PM, Kelvin Lawson kelv...@users.sf.net wrote:

 Hi Steve,
 Good to hear from you.

 I was reading the http://kibosh.org/blog/ and saw a couple posts about
 the project looking for a developer to look over the Windows port.  Has a
 developer been found yet?  I'm a developer by day and a while ago hacked on
 the pykaraoke source to make some improvements for my wife and I's setup at
 home.  Unfortunately, we never got around to rolling those improvements back
 upstream :( sorry.  Is there still some active development going on these
 days or any high level goals for the project?

 As yet we don't have a Windows developer: if you have any spare moments to
 contribute (however small) then that would be much appreciated. I'd be happy
 to give you commit access to the repository at Sourceforge.
 There probably isn't a huge amount to do that is Windows-specific. I have
 run it in a VM occasionally and the main thing I noticed was that a few of
 the popup windows were badly sized. Also I only have XP here so it would be
 good to have someone with Vista on board to cover that. I have heard, for
 example, that songs cannot be cancelled part-way through playback on Vista,
 but don't have a copy to try it out.
 Building release installers for Windows is pretty easy these days. I
 documented the procedure here:
 http://kibosh.org/pykaraoke-development-windows-installer/
 Once you have the prerequisites installed, it's just a couple of commands
 to build the entire installer.
 Any features you think are lacking would be gratefully received, and
 generally these would work on any platform. If you don't have Linux over
 there then I can easily run your changes here to make sure they work
 cross-platform.
 Do you have any thoughts on useful features to add to the roadmap? Some of
 the things I'd like to add, but haven't had the time to do yet, are:
 * More KJ features (singer tracking etc, splash screen between songs)
 * Playback of LRC  other formats
 * Progress bar
 Would be interested to hear any other ideas you have.
 Best regards,
 Kelvin.

 Steve





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Re: [Pykaraoke-discuss] pykaraoke windows developer

[Kelvin Lawson]

Hi Steve,

Good to hear from you.

I was reading the http://kibosh.org/blog/ and saw a couple posts about the
 project looking for a developer to look over the Windows port.  Has a
 developer been found yet?  I'm a developer by day and a while ago hacked on
 the pykaraoke source to make some improvements for my wife and I's setup at
 home.  Unfortunately, we never got around to rolling those improvements back
 upstream :( sorry.  Is there still some active development going on these
 days or any high level goals for the project?


As yet we don't have a Windows developer: if you have any spare moments to
contribute (however small) then that would be much appreciated. I'd be happy
to give you commit access to the repository at Sourceforge.

There probably isn't a huge amount to do that is Windows-specific. I have
run it in a VM occasionally and the main thing I noticed was that a few of
the popup windows were badly sized. Also I only have XP here so it would be
good to have someone with Vista on board to cover that. I have heard, for
example, that songs cannot be cancelled part-way through playback on Vista,
but don't have a copy to try it out.

Building release installers for Windows is pretty easy these days. I
documented the procedure here:
http://kibosh.org/pykaraoke-development-windows-installer/

Once you have the prerequisites installed, it's just a couple of commands to
build the entire installer.

Any features you think are lacking would be gratefully received, and
generally these would work on any platform. If you don't have Linux over
there then I can easily run your changes here to make sure they work
cross-platform.

Do you have any thoughts on useful features to add to the roadmap? Some of
the things I'd like to add, but haven't had the time to do yet, are:

* More KJ features (singer tracking etc, splash screen between songs)
* Playback of LRC  other formats
* Progress bar

Would be interested to hear any other ideas you have.

Best regards,
Kelvin.


 Steve





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Re: [Pykaraoke-discuss] installation problem on linux

[Kelvin Lawson]

Hi Francesco,

Fedora splits pygame up into a pygame and pygame-devel package. In order to
compile the fast CDG playback module you need to also install the
pygame-devel package.

Thanks,
Kelvin.


2009/8/30 Francesco Ruvolo ruvo...@libero.it

 Hello,

 I'm trying to install on Fedora 11, I have:

 python 2.6
 pygame 1.8.1
 wxPython 2.8.9
 sdl 1.2.13
 mutagen 1.16

 when I try to run setup.py i get this error (I also added it in
 attachment):

 $ sudo python setup.py install
 /usr/lib/python2.6/site-packages/wx-2.8-gtk2-unicode/wx/_core.py:14450:
 UserWarning: wxPython/wxWidgets release number mismatch
  warnings.warn(wxPython/wxWidgets release number mismatch)
 running install
 running build
 running build_py
 running build_ext
 building '_pycdgAux' extension
 gcc -pthread -fno-strict-aliasing -DNDEBUG -O2 -g -pipe -Wall
 -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
 --param=ssp-buffer-size=4 -m32 -march=i586 -mtune=generic
 -fasynchronous-unwind-tables -D_GNU_SOURCE -fPIC -fPIC -I/usr/include/SDL
 -I/usr/include/python2.6 -c _pycdgAux.c -o
 build/temp.linux-i686-2.6/_pycdgAux.o
 _pycdgAux.c:37:27: error: pygame/pygame.h: No such file or directory
 _pycdgAux.c: In function ‘CdgPacketReader_init’:
 _pycdgAux.c:194: warning: implicit declaration of function
 ‘PySurface_AsSurface’
 _pycdgAux.c:194: warning: assignment makes pointer from integer without a
 cast
 _pycdgAux.c: In function ‘CdgPacketReader_FillTile’:
 _pycdgAux.c:349: warning: assignment makes pointer from integer without a
 cast
 error: command 'gcc' failed with exit status 1

 Someone can help me? Thank you

 Bye
 Francesco


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Re: [Pykaraoke-discuss] Extended Debate

[Kelvin Lawson]

Hi John,

2009/7/31 John Schneiderman joh...@meent.biz

 There's some debate here where I work about moving forward with the
 PyKaraoke
 project. At this time nothing has been decided or set in stone. We want to
 open up communications to see if our goals fit the community. We are
 looking
 for a karaoke player that we can use in a professional capacity. To that
 end,
 we have contributed several enhancements and bug fixes to this project. The
 two major concerns we have are the usage of the LGPL for the GUI code, and
 the lack of modularity in the overall architecture. The issue with the GUI
 code being LGPL is the possibility of the company's work being used against
 it to be built into a larger system. Though this was a concern even in the
 beginning, it is increasingly becoming a sore spot as each new enhancement
 is
 given. The other issue is the architecture of the system. It appears to be
 more and more fragile with each new enhancement. The possible corrections
 for
 this are to re-write/re-design the architecture itself. Once again, let me
 say nothing has been decided. We actively wish to discuss these concerns
 and
 see if any possible solutions can be made to address them.



Interesting question. From the start I always intended for PyKaraoke to be
usable in commercial projects. To that end I deliberately avoided GPL to
remove any restrictions / concerns that commercial projects may have about
whether they are free to use it. Rather than go with a BSD-style license,
however, I settled on LGPL so that anyone could use it within their products
but any changes to the core code should be submitted back. Essentially I'm
happy for people to use it in any kind of product, but I'd like to encourage
people to submit back improvements for everyone else's benefit.

My concern about the GPL is that this discourages people from using
PyKaraoke as the underlying playback library in their products when I am not
interested in forcing people to release all of the rest of their source code
just because they combine it with PyKaraoke. Using LGPL restricts the burden
of sending code back to only the PyKaraoke code itself.

However I can see that there may be an argument for not applying the same
license to the GUI itself. While I think the above is a sensible approach
for the CDG, KAR etc playback modules it might not necessarily make sense
for the GUI. So I am not against applying the GPL to the GUI, but I wanted
to let you know my original thoughts from a few years back when I started
the project and to gauge general opinion as well. If anyone has any opinion
on this then please let us know.

Regards,
Kelvin.
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Re: [Pykaraoke-discuss] DJ Player Progress

[Kelvin Lawson]

Hi John,

 On Wednesday 4 March 2009 18:30:20 Kelvin Lawson wrote:
 Thanks for keeping us posted. Did you implement a new frontend or is it
 an extension of the main Wx GUI? Either way I'm happy to incorporate any
 new features within PyKaraoke.
 
   I've actually done both. I've created a standalone front-end that can 
 also be 
 incorporated into the main PyKaraoke GUI as well. Allowing for maximum 
 flexibility. The player itself would be under the GPLv3+.

I haven't really followed the progress of GPLv3 - I made PyKaraoke LGPL 
because it's fairly open and I wanted to encourage people to use it both 
privately and commercially. I guess it could go mixed license to 
incorporate your standalone player, or it could be an additional 
package. If you player requires the PyKaraoke underlying libraries I'd 
prefer to maintain them in one tree rather than try to maintain separate 
forks.

Look forward to seeing what you have.

Kelvin.

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Re: [Pykaraoke-discuss] DJ Player Progress

[Kelvin Lawson]

 If, for example, my company takes a GPLd program and modifies it, we could use
 it in-house with impunity, but we could not distribute it to anyone else
 without including *the sources for any changes we made*.
 
 We aren't compelled to distribute those changes, though, merely because
 we *made* them to GPLd code.

While we're on the subject, I'll chip in with the reason I chose LGPL 
for PyKaraoke. In the interest of widespread usage of the PyKaraoke 
modules, I specifically wanted to allow anyone to import and use it 
within their own applications without fear of having to open up the rest 
of their code (i.e. the non-PyKaraoke parts). I'm not sure what the 
consensus is with respect to GPL on whether importing a Python module 
would cause the rest of your code to be GPL, but for the avoidance of 
doubt I went with LGPL.

Cheers,
Kelvin.

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Re: [Pykaraoke-discuss] DJ Player Progress

[Kelvin Lawson]

Hi John,

   Just giving an update on the DJ player progress. It's moving along 
 nicely. 
 Should have something to show in the next few days. Is this something that as 
 a community we would like to be a part of PyKaraoke, or would it be best to 
 spin it off as a separate project?

Thanks for keeping us posted. Did you implement a new frontend or is it 
an extension of the main Wx GUI? Either way I'm happy to incorporate any 
new features within PyKaraoke.

Regards,
Kelvin.

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Re: [Pykaraoke-discuss] cdgtools - static

[Kelvin Lawson]

Hi Tim,

You could ascertain whether it was the MP3 encode by fiddling with the 
cdgrip() function in cdgrip.py. It saves a raw WAV file, then encodes to 
MP3. If you're comfortable modifying the Python code then you could try 
omitting the MP3 encode step to see whether the raw WAV works (you can 
play WAV files in PyKaraoke but obviously they take up a good deal more 
room). If endianness is to blame, you can also pass different parameters 
to lame to swap endianness.

Cheers,
Kelvin.


 I think it is possible to use cdparanoia for making the
 mp3 files. Maybe the cdg and the mp3 files are out
 of sync, but I don't expect there will be any troubles.
 
 Yup, this actually worked pretty well.  I just used cdparanoia to rip
 the audio to .wav and now it sounds great and is in sync, as far as I
 can tell.  My wife is much happier. =)
 
 I wonder if there's some endian issue that cdrdao had that cdparanoia
 picked up on.  Seems to be a likely explanation given the fact that the
 broken MP3 tracks would actually start the audio (static) at the correct
 time.
 
 Anyway, I'm up and running.  Thanks again,
 tim
 
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Re: [Pykaraoke-discuss] Next Feature

[Kelvin Lawson]

Hi John,

 I was thinking the next feature I'm going to tackle is having the ability to 
 add the singers name in the play-list. Thoughts?

I get contacted regularly by people who would like to use PyKaraoke for 
professional hosting, so I think you would make a lot of friends with 
this. I'll dig out some of the comments I've received in this area for 
you to have a quick look over.

Thanks,
Kelvin.

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Re: [Pykaraoke-discuss] error when trying to install in debian

[Kelvin Lawson]

No problem Nick.

Kelvin.


 Surelly, haha
 
 Good Kelvin, good.
 
 apt-get install python-dev
 
 solve my problem.
 
 Thanks for all!
 
 
 On Mon, Oct 13, 2008 at 8:13 AM, Kelvin Lawson [EMAIL PROTECTED] wrote:
 Hi Nick,

 It looks like you are missing several important header files like Python.h
 and SDL.h. Did you install the libraries which are required by PyKaraoke?

http://kibosh.org/pykaraoke/installation.php

 The Debian instructions there are:

apt-get install python-dev python-pygame libwxgtk-python libsdl-dev

 Cheers,
 Kelvin.
 


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Re: [Pykaraoke-discuss] Time Left

[Kelvin Lawson]

Hi John,

 Forgot to add that the format for the status message I'm considering is:
 [Current Time/Time Remaining] Artist - Title

Sounds good to me, the Playing text is redundant.

Thanks,
Kelvin.

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Re: [Pykaraoke-discuss] Timidity SoundFonts

[Kelvin Lawson]

Hi,

 thank you for great work you've done with pykaraoke!
 This is my problem: pykaraoke works well with default timidity's
 settings, but if i change timidity's configuration to use other
 Soundfonts files, pykaraoke don't output any sound.
 Of course i try to use new SoundFont file with timidity only, and it
 works well. 

There used to be a good HowTo which a PyKaraoke user recommended to me 
for setting up timidity (for eawpats in his case). Unfortunately the 
link seems to be down:
http://www.think-future.de/wiki/index.php?title=MIDI

I've emailed the site owner to ask whether he can provide the page text, 
I'll let you know what comes back.

Meanwhile as this is really down to Pygame which is used under the hood 
of PyKaraoke, you might get some help from the Pygame mailing list.

Cheers,
Kelvin.

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[Pykaraoke-discuss] PyKaraoke v0.6 Released

[Kelvin Lawson]

Hi Folks,

We are please to announce the release of PyKaraoke v0.6.

There are many new features and improvements in this version. Here are 
some of the highlights:

* Much improved GUI with many new features and additional configuration 
options.
* Launch external media players to play other formats such as DIVX, XVID etc
* Export karaoke files to MPEG format (command line only).
* Many enhancements on the GP2X platform.
* Now confirmed to work with OSX.
* Internal improvements and fixes in the CDG and KAR players.

And much more, see the full changelog here: 
http://sourceforge.net/project/shownotes.php?group_id=123242release_id=609671

Download it at the usual place:
http://kibosh.org/pykaraoke

Thanks to David Rose for more stellar work on this release.

Kelvin.

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Re: [Pykaraoke-discuss] CDG C implementation

[Kelvin Lawson]

Hi John,

 How do I get PyKaraoke to use the C implementation and not the python 
 implementation. I'm running GNU/Linux.

It should build and use the C implementation if you use python setup.py 
install to install it. This must be run with root privs.

If you see the message Using Python implementation of CDG interpreter 
on a terminal when you launch it then the above didn't work. Do you 
still see this message after running setup.py?

Cheers,
Kelvin.

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Re: [Pykaraoke-discuss] how to display Polish chars from *.kar?

[Kelvin Lawson]

Hi Maciek,

It turns out that one of the recent releases removed support for 
international chars from the kar player - it will be fixed in the next 
release.

Regards,
Kelvin.


 New Pykaraoke user here. Hello to Everyone!
 
 I need to play *.kar with Polish characters. No matter what
 is typed in Config - Default charset, Pykaraoke 0.5.1 on
 Ubuntu Dapper renders Polish characters wrong. I tried
 iso-8859-2, cp-1250, UTF-8 and still those characters are
 garbled, in the same way all time, like if the charset
 definition was ignored.
 
 Is thare anything that could be done about it? New Year's
 Eve is coming :).
 
 A sample kar file I tried is attached if anyone wants to test.
 
 Maciek
 
 
 
 
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Re: [Pykaraoke-discuss] So, what's everyone doing with PYK?

[Kelvin Lawson]

Hey Will,

Good to hear from you.

 PYK has always been pretty good :) The patches I submitted back (I 
 think) in 2005 (yeesh, has it really been that long already?!?!) made it 
 do pretty much everything I ever wanted it to do; the only thing it's 
 missing now from a raw functionality perspective is key changing / pitch 
 shifting, changeable at runtime with a keystroke or on the command line.

Presumably you can still use JACK to do the pitch-shifting while pycdg 
doesn't support it natively?

 I'm still very keen to build a real GUI and automation chain for the 
 rotation management side of things, though.

I've heard from quite a few people over the years who are keen to have 
something like this. Hopefully there will be someone out there listening 
who feels they can lend a hand.

Cheers,
Kelvin.

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Re: [Pykaraoke-discuss] Show the lyrics on an other monitor

[Kelvin Lawson]

Hi Floris,

 I've found that pygame hasn't support for multiple displays so I guess the
 problem have to be solved with something like os.system('DISPLAY=:0.1 ').
 Unfortunately I can't figure out the point where the database window opens
 the lyrics window

The playlist GUI (pykaroake.py) calls out to MakePlayer() in pykdb.py to 
start the players. This in turn uses either pycdg.py, pykar.py or 
pympg.py depending on the songfile type. All of these eventually make 
use of InitPlayer() in pykmanager.py to initialise pygame if necessary. 
You may find InitPlayer() is a useful place to do something like this.

That said, I don't know whether it is even possible to set the X display 
in this way. I strongly suspect that it won't be possible to have the 
same process utilising two different X displays (one for WxWidgets and 
one for Pygmae), but I don't know what the rules are there with X. It 
might be necessary to spawn a new process to handle the player windows 
rather than run them as a thread within the existing process. It should 
be possible to insert a different interface between the playlist and the 
players such that two separate processes communicate using something 
like a socket. You'd need to implement two-way communication such that 
the playlist can tell the player process to play/pause etc. and when the 
song finishes the player can callback to the playlist to notify it. 
Hopefully the interface will be clean enough such that you can drop in a 
replacement glue layer to handle the interprocess communication

If you're interested in taking this up I'd be happy to provide further 
info on how it all fits together.

Kelvin.

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Re: [Pykaraoke-discuss] Minor PyKaraoke modifications

[Kelvin Lawson]

Hi Marcus,

Thanks for sending in your changes. Are you interested in submitting 
them for use by the project? I'll take a look.

I haven't done any Windows releases myself since the compilation stage 
was added, but have you tried using the free Visual Studio Express?

Kelvin.


 Basically, my changes
 are simple interface changes.  My mods will show the zip and cdg file
 names in the search and playlist views if they are different and then
 I've added a dropdown box to select who will be singing the next song. 
 So, whatever name is in the dropdown box when you right click - Add
 To Playlist, will show up in the first column.  All of my changes are
 marked with MDP.  Anyway, I'd like to compile this and turn it
 into a Windows executable, but I don't have VS2003.  is there any
 chance that someone on this mailing list could compile these changes
 for me?  I'd attach the code to this email, but I'm not sure that the
 list manager will accept it, so if you want it or can help me, just
 email me and I'll send the program.
 
 
 
 Thanks.
 
 Marcus
 
 
 

 
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Re: [Pykaraoke-discuss] pycdg segfault on amd64

[Kelvin Lawson]

Hey Will,

 I suspect this is either a numeric thing or a pygame thing -- aren't 
 there some compiled bits in those libraries for speed purposes on some 
 systems? I recall having a 64-bit problem myself when I was first 
 mucking with PyKaraoke myself ;)

Yep I believe that one was a pygame vs 64-bit bug.

In this case there are no libraries involved, however. It's just our own 
C module _pycdgAux.c which is reading the CDG bytes read directly from 
the CDG file. The problem is that it's reading an x,y offset from the 
CDG file which is outside of the 300x216 screen size, i.e. the data in 
the file at this location isn't a perfect rip of the original CDG 
command. The C code was then using this x,y offset to index into an 
array sized at 300x216. This was what caused the seg fault that Daniel 
sent the debug info on. It won't necessarily cause a seg fault on all 
machines though, as I found on my PC. It would have just been stomping 
on some memory somewhere that it probably shouldn't :-)

It turns out that both of these files fail when using the pure Python 
implementation of pycdg as well, for the same reason: array index out of 
bounds. I'd better fix that one up too. The lesson here is to 
sanity-check the CDG commands as they aren't always perfectly ripped.

Kelvin.

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[Pykaraoke-discuss] CDG Player Seg Faults

[Kelvin Lawson]

Folks,

I recently started getting seg faults when running pykaraoke/pycdg from 
source. The version installed into /usr was still running correctly, but 
I got seg faults when attempting to run from the source directory.

I narrowed it down to the external compiled module (_pycdgAux.c), and 
after a recompile (python setup.py install in the pykaraoke directory) 
it's working again. I haven't done much work with Python C bindings but 
I presume this means my Python version has changed and you need to 
recompile any bindings when this happens.

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[Pykaraoke-discuss] PyKaraoke goes to your head

[Kelvin Lawson]

How's this for a novel usage of PyKaraoke?

http://www.robotcowboy.com/?p=67%22
http://www.youtube.com/watch?v=xnUqrcUB8oc

Kelvin.

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Re: [Pykaraoke-discuss] Pykaraoke for OSX

[Kelvin Lawson]

Hi Rob,

I've spoken with a PyKaraoke user who has got it running on OSX.

You'll need to install Python (www.python.org), Pygame, WxPython and 
Numeric. I think the latter three are available from here:
http://pythonmac.org/packages/

He didn't get the compile/install working and we haven't investigated 
why yet, but it's possible to run it without installing by just 
unpacking PyKaraoke and typing:

python pykaraoke.py

It looks pretty nice on OSX, but the config window was a strange size. 
You can fix this by changing the CONFIG_WINDOW_SIZE parameter in 
pykaraoke.py to 240,90.

Would be interested to hear how you get on.

Kelvin.


Stief Robert wrote:

 Hi there,
 
 i´m interested on Pykaraoke for OSX. If there´s a chance for testing  
 a Beta i would be glad to do this for you.
 I usually used Winamp and a CDG plugin but now i´ve changed to an imac.
 
 Sorry for my bad english, i´m a native german speaker.
 
 greets
 Rob
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Re: [Pykaraoke-discuss] pykaraoke hardware requirements

[Kelvin Lawson]

Hi Martin,

 what are the minimum hardware requirements for pykaraoke? i
 have a pentium one box around here, i don't know exactly the
 mhz and amount of ram, and i supppose it has an old pci
 video card.

I'm not sure what the minimum requirements are I'm afraid. The latest 
version received some big performance improvements, but I would think 
that PyKaraoke would still struggle on a Pentium One. Suck it and see?

 i would install gentoo on it. or do you know of a better
 distro (because gentoo has only the newest packages, and
 perhaps pykaraoke could probably work better on a slow
 machine with the lowest versions of its dependencies...).

The latest release of PyKaraoke (i.e. the one with the optimisations) 
requires a relatively recent version of WxPython (2.5) so an old distro 
probably wouldn't fit the bill.

All the best,
Kelvin.

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[Pykaraoke-discuss] PyKaraoke v0.5 Released

[Kelvin Lawson]

Hi Folks,

Thanks to the excellent efforts of David Rose, we've just released 
PyKaraoke v0.5. Download it at the usual place:

http://kibosh.org/pykaraoke

Changes in this release are:

* Added support for GP2X
* CDG: Much improved performance by porting down to C
* CDG: Smoother scrolling and fixed horizontal scrolling
* MIDI: Fixed mid-song tempo changes
* MIDI: Smoother font-scaling and word-wrap
* pykaraoke_mini: New simple GUI for simpler environments (suitable for 
smaller screens and simple joystick control, or for use on a TV with a 
remote-control)
* Many other internal changes

As testament to the portability of PyKaraoke, it now runs on Windwos, 
Linux, FreeBSD and GP2X. Please let us know if you are interested in 
bringing PyKaraoke to other platforms.

Since the last release PyKaraoke has been added to the Debian, Arch 
Linux, Ubuntu Edgy and FreeBSD repositories. If you are interested in 
providing packages for other distros then let us know.

Kelvin.


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Re: [Pykaraoke-discuss] New ripper

[Kelvin Lawson]

 Yes, absolutely. I would like to know if anyone else has successfully
 compiled and test it.

Great, I can feel a v0.4 coming on. We're in the middle of buying a 
house at the moment so time is limited, but I'll have a go at building 
it here and fitting it into a sensible release package.

 When I had extracted the .bin image I ran it through dcdgrip to split it
 but the results were not as expected. The CDG info was garbage and the
 audio was very badly distorted (like samples were missing and maybe cdg
 data was still present)

Interesting. I certainly didn't expect the audio to be affected by using 
RW mode. I'm inclined to go with your reason 3 as well - that the data 
is not arriving in the expected order. Could the CDG data be smaller 
because the parity bytes have been removed?

 From reading about other people who have tackled the 
software-deinterleave process (e.g. the Audiograbber guy) my 
understanding was that this was a pain-in-the-ass that you can avoid by 
using RW drives. I'd be surprised if there was anything particularly 
complicated to do so we must be missing something simple. You said you 
looked at the bin file - did you compare it with the RW_RAW output from 
the same disk? If you have an example of the first few KB output using 
both modes I'd be interested to see it.

Cheers,
Kelvin.

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Re: [Pykaraoke-discuss] New ripper

[Kelvin Lawson]

Hello Folks,

Thanks a lot for posting your code Drew, glad to hear you got it 
working. If you don't want the hassle of packaging it up yourself in a 
release it sounds like a good addition to the cdgtools suite. I tend to 
use Python for home projects simply because I find it quicker to get 
something functional, but I see no reason why C code shouldn't go into 
cdgtools. Let me know if you're interested (cdgtools is LGPL by the way).

 It decodes the q channel and checks to see if the track number has
 changed.
 
 If it has the program then does a CRC check (there is a CRC value built
 into the q channel) and if the CRC is bad the change of track is
 ignored. Initially I didn't include the CRC checking but I found that
 the q data was often corrupted in one or two sectors in the track so the
 CRC eliminates these erroneous track boundaries. 

This is good stuff.

 dcdgrip doesn't do this yet but... as such. If I'm understanding you
 correctly you want to read one track and then split and encode it.
 
 I have already thought of adding an option to select which tracks you
 want to rip (from the complete bin file) but it shouldn't be too hard to
 make it encode from a bin file containing just one track (will cdrdao do
 this?)

I just had a look through the cdrdao man page and to my surprise there 
doesn't seem to be an option to rip single tracks. Anyone know of any 
other suitable rippers?

Yeah, drives are very random and finicky about this part of things.
Figuring out whether you've been handed raw or cooked subchannel data
is a pain in the [EMAIL PROTECTED] :) 
 
 I'm not totally convinced that it's just a drive problem. Has anyone on
 the list every got RW data to work?

My drive returns the data interleaved, so I've only ever tested rw_raw 
mode (using the software-deinterleave) hence the note of caution in the 
instructions for rw mode. My thinking was that the data returned in rw 
mode would need nothing doing to it at all, it could be written straight 
out to the CDG file as it came from the CD drive. Have you found this 
not to be the case? Could it be that the drives concerned don't support 
rw mode?

Cheers,
Kelvin.

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Re: [Pykaraoke-discuss] pykaraoke can't play mpg's [sorry for incomplete mail before]

[Kelvin Lawson]

Hi Cyrill,


It works now...


Glad to hear it!

Does this change the resolution for playing? 


Sorry, I'm not sure what you mean?

Quite cool... But it would also have worked just with mplayer or so :) But its 
easy to be able to start the movies from the same tool.


This is true. The MPEG support is really just a bonus feature - in 
future I've been planning to add support for external players to the 
GUI. That way you could add support to the database/GUI for a large 
range of movie formats and spawn off an mplayer process to handle them.


All the best,
Kelvin.


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Re: [Pykaraoke-discuss] [HOWTO] Implementing pitch-shifting and crossfading (for filler music/other sources) for PyKaraoke on Linux with JACK

[Kelvin Lawson]

Here's a curious idea: I wonder how hard it would be to recast Kelvin's
rendering code as an Mplayer codec?  Did we already talk about this?


I've fancied doing this for some time but haven't got round to it yet. 
Making an mplayer/ffmpeg codec would give you CD+G for free with a whole 
bunch of video players, as well as those commercial DVD players and 
other devices that use ffmpeg.


I'd need to rewrite it in C but it should translate fairly easily, 
especially given what we now know about CD+G.


Kelvin.


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Re: [Pykaraoke-discuss] [HOWTO] Implementing pitch-shifting and crossfading (for filler music/other sources) for PyKaraoke on Linux with JACK

[Kelvin Lawson]

In fact the only missing piece apart from digital mixing is a lack of
straight-from-CD CD+G player, which is something I'm interested in
doing anyway, and I think Python can do it. Any hints or thoughts,
Kelvin?


I've given it some consideration in the past but not in great detail. 
Pygame can play audio tracks on a CD but (unsurprisingly) there is no 
facility to read the subchannel data.


Initial thoughts on the simplest thing to implement would be to combine 
a cdrdao/cdgrip pass with pygame's CD playback. It's just a hack but it 
buys you something. After selecting a track, you spawn off a process to 
rip just the CD+G data without any MP3 encoding. You can then play this 
back as usual with pycdg.py while the CD track plays. Should be 
relatively quick to implement but you pay the price of the time spent 
doing the rip before playback.


Doing it *properly*.. that's a different thing. I don't know, for 
instance, what the usual method would be for extracting the subchannel 
data on Linux. Whether you'd need to use a library like cdrdao, or 
whether it's just as easy to get what you need straight from the OS. I'm 
thinking something like Python bindings for cdrdao to read the 
subchannel data - and if you're doing this in real time then presumably 
you'd want to read the audio data at the same time, rather than have two 
proceses seeking around the disk. I'd need a deeper look into the likes 
of cdrdao to comment any further than that.



The link is Coral Cache-ified by the way because I'm expecting heavy
traffic in a few days; a not-so-friendly company is threatening to sue
me because I posted my experience with them on my site, and
negotiations broke down recently. I went public with the details, and
Tom Martino (the Troubleshooter) is going to have me on his radio
program Monday to hash this stuff out. Heh. This should get
interesting fast :)


Itching to hear how this pans out.

Kelvin.


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Re: [Pykaraoke-discuss] subcode and deinterleaving question

[Kelvin Lawson]

Hi Drew,


I've been reading all the info I can find but I must admit I'm getting a
little confused partly because the terms frame and sector do not
seem to be used consistently. For instance the ECMA-130 standard seems
to refer to 588 bits burnt on to the disk as a frame.


Thanks for the headsup, I hadn't seen that ECMA 130 before. I thought 
the gory details were to be found in the Red Book which costs money, so 
it's great to find this info available for download.


I've just had a scan through it, and it distinguishes between sections, 
sectors and frames. We've used sector and frame to describe the same 
thing in the cdgtools code - as the 2352 bytes of audio + (2 * 392) 
bytes error correction/detection + 98 bytes subchannel data. Looks like 
we should replace frame by sector throughout the code.


Some of the above is filtered out to get the data returned by cdrdao. We 
get the 2352 bytes of audio data, plus 96 bytes of subchannel data. (The 
first two bytes of subchannel data appear to be sync bytes, hence 
getting 96 instead of 98). The subchannel data is contained in the 
control byte discussed in the document.



I know a certain amount of interleaving goes on in the audio data prior
to it being written onto the disk but I was under the impression that
the same could not be said about subcode?


It looks that way from the document. The CIRC coding is done before the 
control bytes are added, but perhaps the control bytes are then added in 
the relevant place, i.e. they are not added in order because they are 
placed according to the position of the CIRC-encoded data? I haven't 
read deeply enough yet to figure that out.


As you can probably tell from the above, I'm pretty much in the dark 
about the interleaving process. When writing cdgtools I noticed that my 
drive was returning data that looked almost correct but with the bytes 
spread around. I couldn't find any information on the interleaving 
process, and believed it to be in the Red Book, but came across the 
following:


http://club.cdfreaks.com/showpost.php?p=719361postcount=13

This guy was in the same position as me, but had the patience to sit 
down and reverse engineer which bytes went where.



Is it just the r to w channels which are interleaved or is it the whole
subcode byte? (including the p and q channels).


I'm not sure because I mask out only the P and Q subchannels. Are you 
asking because the CIRC section discusses encoding of P and Q bytes? The 
way I read that was that these are parity bytes, unrelated to the p-w 
subchannels (confusing terminology).


My (probably flawed) thinking is that the control bytes containing 
subchannel data are not put through the CIRC process, but are matched up 
with the new position of the relevant frame after CIRC encoding, and so 
are effectively interleaved. Bear in mind I don't even know if the 
deinterleaving code in cdgtools is actually reversing the CIRC 
cross-interleaving, or if it's some other magic altogether. It would be 
great if you had the time and inclination to check this out :-)


Hope that helps,
Kelvin.


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Re: [Pykaraoke-discuss] PyKaraoke v0.4.2

[Kelvin Lawson]

It's a good solution for Linux, though I don't think JACK or the other
stuff runs on Win32 though; it's *possible* you could build a similar
kind of toolchain on Win32 though with whatever SDL is using for sound
delivery.


Well I think all of the calls for pitch-shifting so far have come from 
Linux users so this should be OK for now. Built-in pitch shifting could 
be a longer term goal if nothing is available on Windows.



I'd be glad to write up a howto. It was fairly easy to do once I
figured out the little gotchas. I'll post it in the next few days.


Great, thanks.


If that's still true, then yeah, I just need to update the
UpdatedTiles chunk to tell it I've written changes there. Of course,
the way I was doing it, I was just drawing the text on every frame
anyway. I think I saved the rendered text and only changed *it* when
necessary, then blitted it onto the finished output buffer right
before it got displayed.

Bleh. I need to dig some more to remember how I did it :)


OK, let me know if you need any pointers.

Kelvin.


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[Pykaraoke-discuss] PyKaraoke v0.4.2

[Kelvin Lawson]

That reminds me... I've had v0.4.2 ready to go for some time now. Tthe 
Linux/source release is on Sourceforge now. The Windows installer will 
follow later.


Changes in this release are:

* pycdg: Support starting files without .cdg extension for tab-completion
* Fix Border Preset commands (don't clear entire screen)
* pycdg: play CDGs without an MP3 file for test purposes
* pycdg: Fix FutureWarning on 0xs
* pycdg: Fix option type 'str' for optparse
* GUI: Reorder Playlist (drag  drop)
* GUI: Drag and drop from Search View to Playlist
* GUI: Drag and drop from Folder View to Playlist
* GUI: Made some of the GUI features reusable by other scripts (Craig Rindy)
* GUI: Fix non-ASCII characters in filenames (Craig Rindy)

Cheers,
Kelvin.


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Re: [Pykaraoke-discuss] Pykaraoke, ogg and an intro

[Kelvin Lawson]

Well that was fast! 
That fixed it!


Excellent!


Above the pygame.init() call in pycdg.py and it seems to solve the
problem.


If only I'd waited half an hour before releasing v0.4.2 :-) Mind you I'd 
like to do some testing on this before releasing it anyway. It'll go in 
the next version.



I don't have mp3 playback set up, I read in the documentation somewhere
that it required recompiling SDL (and I could be arsed as didn't want to
use mp3 anyway)


Yes it can be a pain on some distros. If you change your mind there are 
some step-by-step instructions on the website that worked on a recent FC 
release.


Thanks for letting me know,
Kelvin.


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Re: [Pykaraoke-discuss] Fast chirping sound when tryingt to play a song

[Kelvin Lawson]

Hi Harry,

We recently had some trouble getting the graphics to sync up with the 
audio on lower spec machines. We made a lot of improvements but I'm not 
convinced that would extend down to 400MHz. That said, I'm surprised 
it's the audio that's failing.


On Windows you should get better results from an application that takes 
advantage of hardware accelerated graphics etc. PyKaraoke currently 
takes advantage of Python and some Python-based libraries so that we can 
run the same code on many platforms. Unfortunately this raises the bar a 
little in terms of minimum requirements, and I suspect that a 400MHz 
machine will not be suitable.


All the best,
Kelvin.


Harry Gambardella(HG Entertainment) wrote:

Hi,
I've installed the lastest version of PyKaroke on a 400mhz Toshiba 
laptop running Windows 2000pro.


It installed and opens OK.

I searched my folder of a handful of MP3+g files.  I can open the song 
up, it will display the text of the CDG file, but I cannot hear the 
music.  All I hear is a loud CHIRPING sound.


Is there something I'm doing wrong?  Can I run this program on this laptop?

Thank you,
Harry



*HG Entertainment*
Harry Gambardella (Entertainment Specialist/DJ)
*Outstanding DJ Fun!
*http://HG-Entertainment.com
(203) 238-4895




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Re: [Pykaraoke-discuss] CAVS' Super CD+G format

[Kelvin Lawson]

Any insights here would be welcome.  I infer from the patent that if I
can get to MCG files, they might be reasonably parseable with the
current engine...


I'd definitely like to learn more about this. Do you know if any players 
other than CAVS have managed to decode it? I haven't heard of any.


I'd also like to add .kok and .lrc support, though those are probably 
less interesting to you KJs.


Which reminds me... I set up a little wiki page to note down requested 
features for PyKaraoke. If you'd like to add anything (or even better 
tick some off the list :-)) it's at:


pykaraoke.wikispaces.com

Feel free to chip in, add a separate section for a professional player etc.

Kelvin.


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Re: [Pykaraoke-discuss] Re: FINALLY -- ghod I hate SuSE

[Kelvin Lawson]

OK chaps I've knocked up a quick proof of concept. Jay, could you try 
out the attached pycdg.py please? Basically I've just divided the screen 
into four segments. I now only do the scaling on the segments that have 
been updated. I'm not sure how it will pan out, so before I tidy it up 
and do it properly, could you give this one a go? FPS is set to 30.


That first draft was a little rough round the edges. Amongst other 
things, it didn't update the screen on Preset commands. I've attached 
the latest version for your testing pleasure.


Beware that this one includes some code to bar any screen updates if the 
decoding gets 1/4 second behind the music. I figure the best thing to do 
in these situations is to not add insult to injury by carrying on 
performing slow output scaling. If there's a spell of heavy CPU activity 
it'll stop doing any updates, allowing the CPU to catch up quicker. The 
thinking is that a spell of no updates is better than a spell of out of 
sync updates.


Cheers,
Kelvin.

#!/usr/bin/env python

# pycdg - CDG/MP3+G Karaoke Player

# Copyright (C) 2005  Kelvin Lawson ([EMAIL PROTECTED])
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


# OVERVIEW
#
# pycdg is a CDG karaoke player which supports MP3+G and OGG+G tracks.
#
# The player uses the pygame library (www.pygame.org), and can therefore
# run on any operating system that runs pygame (currently Linux, Windows
# and OSX).
#
# You can use this file as a standalone player, or together with
# PyKaraoke. PyKaraoke provides a graphical user interface, playlists,
# searchable song database etc.
#
# For those writing a media player or similar project who would like
# CDG support, this module has been designed to be easily incorporated
# into such projects and is released under the LGPL.


# REQUIREMENTS
#
# pycdg requires the following to be installed on your system:
# . Python (www.python.org)
# . Pygame (www.pygame.org)
# . Numeric module (numpy.sourceforge.net)


# USAGE INSTRUCTIONS
#
# To start the player, pass the CDG filename/path on the command line:
# 		python pycdg.py /songs/theboxer.cdg
#
# You can also incorporate a CDG player in your own projects by
# importing this module. The class cdgPlayer is exported by the
# module. You can import and start it as follows:
#	import pycdg
#	player = pycdg.cdgPlayer(/songs/theboxer.cdg)
#	player.Play()
#
# The class also exports Close(), Pause(), Rewind(), GetPos().
#
# There are two optional parameters to the initialiser, errorNotifyCallback
# and doneCallback:
#
# errorNotifyCallback, if provided, will be used to print out any error
# messages (e.g. song file not found). This allows the module to fit 
# together well with GUI playlist managers by utilising the same GUI's
# error popup window mechanism (or similar). If no callback is provided,
# errors are printed to stdout. errorNotifyCallback should take one 
# parameter, the error string, e.g.:
# 	def errorPopup (ErrorString):
#		msgBox (ErrorString)
#
# doneCallback can be used to register a callback so that the player
# calls you back when the song is finished playing. The callback should
# take no parameters, e.g.:
# 	def songFinishedCallback():
#		msgBox (Song is finished)
#
# To register callbacks, pass the functions in to the initialiser:
# 	cdgPlayer (/songs/theboxer.cdg, errorPopup, songFinishedCallback)
# These parameters are optional and default to None.
#
# If the initialiser fails (e.g. the song file is not present), __init__
# raises an exception.


# IMPLEMENTATION DETAILS
#
# pycdg is implemented as one python module. It performs all
# of the CDG file decoding locally, and gets audio playback
# and video display capabilities from the pygame library.
# It also uses the python Numeric module, which provides
# fast handling of the arrays of pixel data for the display.
#
# All of the information on the CDG file format was learned
# from the fabulous CDG Revealed tutorial at www.jbum.com.
#
# The player is run within a thread to allow for easy
# integration with media player programs. The thread starts
# the pygame MP3/OGG playback, and then monitors the current
# time in the song. It reads the CDG file at the correct
# location for the current position of the song, and decodes
# the CDG commands stored there. If the CDG command requires
# a screen update

Re: [Pykaraoke-discuss] Rip-rap

[Kelvin Lawson]

Great! Thanks Jay.


It probably ought to have an *overall* time tracking facility, and some
logging.  And I need to update my cdrdao to permit slowing down; I'm
ripping some bad tracks.  (Perhaps a way to run the parser and
re-rip on errors?)  But it's a start.

Usage: ripcdg sc 8119


Have you tried ripping using --read-subchan rw rather than rw_raw, to 
see if your drive supports cooked mode? I can't test it here but as Will 
mentioned that should add error-correction to the mix.


Failing that, you could run the .cdgs through cdg2text and grep for 
whatever it is that ait prints out for unsupported CD+G commands. That 
should give an indication of the quality of the rip, but won't trap 
errors that still result in valid CD+G command codes.


Kelvin.


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Re: [Pykaraoke-discuss] FINALLY -- ghod I hate SuSE

[Kelvin Lawson]

Hi Jay,


Mine is much less happy than that, but, of course, that's at 1280x1024.

Can fullscreen mode change the scan rate of the X server?   Set it to
640x480x8, and the problem would likely evaporate.


I've just spotted the following in the pygame docs:

It is usually best to not pass the depth argument. It will default to 
the best and fastest color depth for the system. If your game requires a 
specific color format you can control the depth with this argument. 
Pygame will emulate an unavailable color depth which can be slow.


Could you try setting DISPLAY_DEPTH=0 in pycdg.py, see if that helps.

Cheers,
Kelvin.


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[Pykaraoke-discuss] Installer

[Kelvin Lawson]

Hi Folks,

I've used python distutils to make a simple install script for 
PyKaraoke. Hopefully this should make it easier to create the various 
packages we need for the distro package managers.


It's in CVS now if anyone wants to try it out. I haven't written any 
installers before so I may have done something non-standard :-) Let me 
know if you have any thoughts on a better way of doing it.


It works like this:

Run python setup.py install as root.

It installs into the following locations:

site-packages/pycdg.py
site-packages/pympg.py
site-packages/pykar.py
site-packages/pykversion.py
site-packages/pykaraoke.py
/usr/bin/pykaraoke
/usr/bin/pycdg
/usr/bin/pykar
/usr/bin/pympg
/usr/share/pykaraoke/fonts/ all fonts
/usr/share/pykaraoke/icons/ all icons

The .py modules need to go into site-packages because the PyKaraoke GUI 
imports pycdg and friends, so they can't go in /usr/bin.


I've written some mini python modules to go into /usr/bin so you can 
start the GUI and players like regular executables. I have no idea 
whether I've done these in a pythonic way but they seem to work. They 
just look like this:


#!/usr/bin/env python
import pycdg
pycdg.main()

Everything actually goes into sys.prefix which I guess could be /usr or 
/usr/local.


That's all for now. Let me know what you think - in the meantime I'll go 
read the Debian packaging instructions.


Cheers,
Kelvin.


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Re: [Pykaraoke-discuss] DJ/KJ in Denver Checking In

[Kelvin Lawson]

I think that I've never *ever* seen a commercial CDG that scrolls.

Ever.

KBS will create them, and I should have that in a week or two.  But I
wouldn't worry *too* much about it.


I've got one from Doctor Music, that I used for testing the scrolling 
code. Can't recall if I've seen it on any others though.


Kelvin.


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