Steffen writes:
> It seems that the avi encoder does not support
> rgb24 or rgb32 pixel types.
avi only supports bgr24 and bgra, this is not a
limitation of FFmpeg.
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Neil Menne writes:
> Would anyone here happen to know the AV_PIX_FMT_*
> equivalent to the OpenCV pixel format bgr8 which is
> explained as being CV_8UC3?
Probably if you can explain how "OpenCV pixel format bgr8"
is defined.
Carl Eugen
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Alex <3.14pi@...> writes:
> Hi, I develop decoder that use NVidia CUDA thechnology.
> And I have problems, for decode frame on CUDA I need
> fill and parse same struc first to CUDA decoder.
> But I don't understend where and how I can get params
> for my struc.
Did you already look into libav
Bjoern Drabeck writes:
> Afaik 8 bit, 3 channels, unsigned char..
> so that would sound like AV_PIX_FMT_BGR24 to me.. right?
Or AV_PIX_FMT_RGB24.
Please fix your quoting / don't use html, Carl Eugen
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Talha writes:
> Anybody who wants to help please take a step forward
> because i have not really got any support on ffmpeg
> during couple of weeks now.
Where did you ask for support?
When reporting build problems, please post the configure line
you were using ("./configure" if it allows to
Steffen writes:
> formatContext->streams[0]->codec->bit_rate = bitrate;
> if (qscale >= 0)
> {
> formatContext->streams[0]->codec->flags |= CODEC_FLAG_QSCALE;
> formatContext->streams[0]->codec->global_quality = FF_QP2LAMBDA *
> qscale;
Without testing, I wonder
Gustav González writes:
> my question is this: is there any encoder example using
> libavformat based onthe latest version of FFmpeg?
Which (other) files in doc/examples did you study?
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Brad O'Hearne writes:
> As constructive feedback, I recommend removing aac entirely
> from the codebase
The native aac encoder is better than most non-experimental
audio encoders for stereo input, it is not good for >2 channels
(which is not supported at all by most other encoders).
That is
Brad O'Hearne writes:
> "This codec is not to be used for production,
> as it will not continue to be developed or supported."
Neither is true as far as I can tell.
(Again, I am not a native speaker, so I may
misunderstand you sentence, but the aac encoder
is neither less nor more supported t
Claudio Freire writes:
> Indeed this symptom seems to happen only with >2 channels.
>
> Is there any possibility of improvement here?
Patch definitely welcome!
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Claudio Freire writes:
> Surely I could and would like to give it a try,
> I've written an AC3 encoder way back so there
> should be no surprises.
That sounds incredibly promising!
> However, I do have my plate overly full.
> Any docs to read about its current limitations
> and perhaps prev
Dayana writes:
> Im trying to make a shared library and for that I
> have to get libavs compiled with -fPIC ... I was
> trying to do it by setting --enable-pic in the
> configure file, however Im still have the same error:
>
> /usr/local/lib/libavcodec.a(lpc_mmx.o)
You are (still) trying to
Claudio Freire writes:
> I don't have access to AAC standards
These are not the final standards, but should help:
ftp://ftp.tnt.uni-hannover.de/pub/MPEG/audio/mpeg4/documents/
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Ratin writes:
> ./configure --extra-cflags="-fPIC"
This is not a good idea since an equivalent
option exists (that may set additional settings).
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Gustav González writes:
> ERROR: gif only handles the rgb24 pixel format.
Originally, there was a gif muxer that only accepted
rgb24 rawvideo as input.
In current git head, you will find a gif encoder (an
encoder instead of a muxer) that can be used by the
image2 muxer (the same muxer used fo
Andrey Utkin gmail.com> writes:
> But i am also interested, is there any libraries rich
> for such and similar functionality, which are
> pluggable to libavfilter?
Some external libraries are supported, please see the
fine documentation.
(Adding more is probably welcome, see below.)
> Second
cyril apan writes:
> http://www.filmform.com/logo/Filmform_gray-on-blank.tif
> stream->codec->pix_fmt == AV_PIX_FMT_RGB24 instead of
> being AV_PIX_FMT_RGBA.
Looks like RGB24 to me, why do you think there is
transparency information?
The other sample is an unsupported format, feel free
to o
Carl Eugen Hoyos writes:
> The other sample is an unsupported format, feel free
> to open an enhancement request on trac.
The second sample uses separated channels iiuc,
this is very unlikely to get supported (easily).
Carl Eugen
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cyril apan writes:
>>cyril apan ...> writes:
>>> http://www.filmform.com/logo/Filmform_gray-on-blank.tif
>> stream->codec->pix_fmt == AV_PIX_FMT_RGB24 instead of
>> being AV_PIX_FMT_RGBA.>Looks like RGB24 to me, why do you
>> think there is >transparency information?
> Open it with Photoshop
Mert Gedik writes:
> (ffplay tries to connect/get data for 15-20 seconds then
> it timeouts with below log.)
>
>
> $ ./ffplay http://88.53.197.250/axis-cgi/mjpg/video.cgi?resolution=320x240
mjpeg cannot be autodetected (yet), you have to force the format:
$ ffplay -f mjpeg
http://88.53.197.25
Bjoern Drabeck writes:
> I was wondering if there is a way that I can reduce the
> time it takes to open a file when I am playing it from
> online.
Did you test the -probesize and -analyzeduration options?
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Alex Cohn writes:
> I have a file exported from Wireshark for an
> audio RTP stream with an AMR codec. I cannot
> read it with
>
> ffmpeg -fmt amr -acodec amr-wb
Please provide a sample (and please send a
patch to ffmpeg-devel).
Carl Eugen
___
Bjoern Drabeck writes:
> > Did you test the -probesize and -analyzeduration options?
>
> Thanks for your reply, I briefly experimented with the
> -probesize option, it seems to default to 500, and I
> brought it down to 10, without any noticeable effect
What happens if you test smalle
Gonzalo Garramuno writes:
> I saw this codeccontext variable ctx->request_sample_fmt
> and I want to set it to AV_SAMPLE_FMT_S16.
Setting request_sample_fmt does in no way guarantee
that you get what you want.
If you think the documentation is unclear, please
consider improving it for us.
Ca
Bjoern Drabeck writes:
> Is there a suggested range of values
The suggested range of values for probesize and
analyzeduration is 32 to 2147483647.
(32 does not always work.)
> for probing online files?
I don't think there are suggested values for online
files, but if you read yesterdays mess
Will Price writes:
> The gas linked below
[...]
Allow me to repeat:
The only supported version of gas-preprocessor.pl is the
one mentioned on http://ffmpeg.org/platform.html
You are on your own with any other version.
If you have a compilation problem, please provide the
following informatio
YIRAN LI writes:
> But when I'm using Ffmpeg interface in my application,
> how can I specify the codecs I want to use?
Did you look at avcodec_find_encoder_by_name()?
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Kalileo writes:
> This is also what I noticed, when playing with
> probesize and analyzeduration trying to get the
> player to start more quickly (using mpegts
> (h264/aac) streams served through a memory buffer).
Since I did not really understand the paragraph I cut:
Do you mean that althoug
Martin Ber writes:
> However encoding is fairly slow and there are some
> settings that I don't know how to configure.There are
> 3 different ProRES encoders and I'm using
> prores_kostya encoder.
There are two encoders, the other one ("prores",
"prores_aw", the first is an alias) is faster.
Steffen writes:
> i'm using FFmpeg 1.2 from March 15, 2013.
If you are not a distributor, please always use
current git head.
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Xian Yan Yang writes:
> I encode my camera video to MPEG4 ES stream with libav.
> I could use VLC to play the video, but it doesn't work
> for quicktime or realplayer.
Do you have an mpeg4 elementary stream that can be
played with QuickTime or Realplayer?
Carl Eugen
Joe Flowers writes:
> I need to use the libav* APIs (specifically the audio
> codecs) in a thread-safe way, but they seem to be full
> of malloc()s and free()s which aren't re-entrant.
My malloc manual says that it uses mutexes "internally to
protect the memory-management data structures empl
YIRAN LI writes:
> Could anyone tell me how to do? Because zlib support is
> auto detected, is there anyway to explicitly disable that?
./configure --disable-zlib
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Will Price writes:
> On Fri, May 10, 2013 at 11:46 PM, Carl Eugen Hoyos writes:
> If you have a compilation problem, please provide the
> following information:
> Your configure line, (your FFmpeg version,) if (and only
> if) compilation fails completely: Run make several time
Gonzalo Garramuño writes:
> I am getting a strange behavior in the latest zeranoe
> builds of ffmpeg when I link them to my program.
I believe there is a forum dedicated to such
questions.
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Pradeep Karosiya writes:
> Also I came to know not all codec support variable frame rate.
(?, that sounds unlikely.)
FFmpeg's mov muxer does not support vfr.
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Robert Krüger writes:
> On Mon, May 20, 2013 at 12:11 PM, Carl Eugen Hoyos wrote:
> > Pradeep Karosiya ...> writes:
> > > Also I came to know not all codec support
> > > variable frame rate.
> >
> > (?, that sounds unlikely.)
> >
> > FFm
Robert Krüger writes:
> >> > FFmpeg's mov muxer does not support vfr.
> >>
> >> Do you know what exactly is missing?
> >
> > No, but it was discussed recently on irc.
(Maybe not recently or not on irc, sorry.)
> OK, I am asking because in the code there is neither
> a comment regarding that no
Gonzalo Garramuño writes:
> as I found an incompatability with the zeranoe
> builds (or so it seems).
Could you be a little more specific?
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Rothkin, Steve (NY81 writes:
> However, when I get more threads running (e.g. 5
> videos being processed in parallel and JPEG frames
> being streamed to a viewer) I'm getting intermittent
> crashes in the DLLs.
Please either provide gdb information as explained on
http://ffmpeg.org/bugreport
Rothkin, Steve (NY81 writes:
> I have not been able to successfully build it with
> VS2005, 2008, 2010, or 2012. I tried the instructions at
> http://ffmpeg.org/platform.html#Microsoft-Visual-C_002b_002b
> but I got failures in make
Would you like to tell us about those failures?
Carl Eugen
Steffen writes:
> ffmpeg.exe -i d:\videos\simpsons_trailer05-de_xhigh.mov
> -vcodec rawvideo d:\temp\test2.yuv
Complete, uncut console output missing.
> ffplay d:\temp\test2.yuv
> [IMGUTILS04baf794] Picture size 0x0 is invalid
> [rawvideo040719c0] Could not find codec parameters for s
Christophe Nelson writes:
> I am wondering if some of the developers of ffmpeg
> have any intention to implement HEVC in ffmpeg ?
Yes.
If you are interested in contributing, please setup your
own git clone and join #ffmpeg-devel on freenode.
Carl Eugen
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hamidi writes:
> i also tried make install on source of ffmpeg (libav)
Please understand that libav contains several
hundred known, user-reported bugs that are not
reproducible with FFmpeg, some of them security-
relevant, and we therefore cannot support it.
> what may be the reason and how c
hamidi writes:
> /hamidi/libav/libav-0.8.6/libavcodec/libx264.c
As said, this is unmaintained and buggy.
Please see http://ffmpeg.org/download.html
for supported versions and
http://blog.pkh.me/p/13-the-ffmpeg-libav-situation.html
for more information.
Carl Eugen
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Christophe Nelson writes:
> ffmpeg.exe -i InputFile -c:v libx264 -preset slow
> -crf 20 -c:a copy OutputFile.avi
Complete, uncut console output missing.
For future questions: Please avoid highjacking threads.
And please avoid top-posting here, Carl Eugen
_
Gonzalo Garramuno writes:
> I am using ffmpeg and libswresample to play back
> movie trailers. For stereo playback everything is
> good, but for Dolby 5.1, I get correct playback of
> all ambient noises but the audio track for voices
> is missing or too low of a sound, like a missing
> chann
prathap writes:
> My android.mk file is
The only thing needed (and the only thing
supported here) is your configure line.
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Gonzalo Garramuno writes:
> I am wondering what's the difference between the
> two formats (Dolby 5.1) vs (Dolby 5.1 (side)).
I am not sure I understand what you mean with
"Dolby 5.1" (is that something that FFmpeg prints?)
but the difference between "5.1" and "5.1 (side)"
is the position of
Matheus Henrique Klem Galvez writes:
> The aim is simple: to read uncompressed .avi videos
> with ffmpeg and send frames to OpenCV format in order
> that OpenCV might be able to process these frames.
(Unrelated to your problem:)
You do know that this is possible with ffmpeg
(the application)?
Alexander Wischnewski writes:
> ffmpeg -v 9 -loglevel 99 -report -i
> "http://192.168.1.166:86/livestream/12?action=play&media=video";
> output.mp4
I you succeed in saving the incoming stream to a file
(and if the problem is also reproducible with that
file), please upload a sample.
Carl Eu
Alexander Wischnewski writes:
> thanks for the fast reply. It is reproducible, i
> dumped the stream to a .avi file
How did you produce the avi file?
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Alexander Wischnewski writes:
> ffmpeg -i "http://192.168.1.166:86/livestream/12?action=play&media=video";
> -vcodec copy h264_ip_cam_input.avi
>
> Was this the wrong way ?
Not necessarily, but it will likely not help showing
if there is a bug in FFmpeg or not.
Does wget work? Or is there may
Matheus Henrique Klem Galvez writes:
> On Tue, Jun 4, 2013 at 11:51 AM, Carl Eugen Hoyos wrote:
> Matheus Henrique Klem Galvez ...> writes:
> > > The aim is simple: to read uncompressed .avi videos
> > > with ffmpeg and send frames to OpenCV format in order
> &g
Pradeep Karosiya writes:
> ffmpeg -i rtsp:://input_video_link outputfile.3gp.
> Console log:
Unfortunately not =-(
I don't find it completely unlikely that FFmpeg simply
fails to save streams coming from unreliable network
source (FFmpeg by default refuses to write invalid
streams, that is
Alexander Wischnewski writes:
> The file h264_ip_cam_input.working of the first
> camera gets decoded well with the command:
Do I understand correctly that one camera produces
a stream that FFmpeg can decode but another one
produces a stream that cannot be decoded?
Or do I misunderstand?
Mos
Alexander Wischnewski writes:
> The file h264_ip_cam_input.nworking produces the
> errors as posted before.
This does not look like a valid h264 file (afaict),
at least the reference decoder refuses to decode it.
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Matheus Henrique Klem Galvez writes:
> How do I do this?
Please read the fine documentation:
http://ffmpeg.org/ffmpeg-all.html#ocv
Please stop top-posting, it is considered rude here!
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Hendrik Schreiber writes:
> But, when writing the result to a file, I want to use
> AV_CODEC_ID_PCM_S24LE, i.e. the least significant
> byte is cut off.
AV_CODEC_ID_PCM_S24LE encoder only accepts
AV_SAMPLE_FMT_S32 as input.
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Dragos Iordache writes:
> The stream is not showing and the recorded video does not
> allow seeking, it just freezes and cannot be played.
Can you reproduce the problem with ffmpeg (the application)?
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Mark Kenna writes:
> When using the JPEG decoder (CODEC_ID_MJPEG) sometimes
> I find that decoded frames are inverted/upside
> down/back to front.
Is this reproducible with ffmpeg?
If yes, a sample may be nice.
Carl Eugen
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thanh nhan thanh nhan writes:
> I got the problem when i tried to decode .asf video file.
Does ffmpeg (the application) decode the file?
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Dragos Iordache writes:
> On Thu, Jun 13, 2013 at 5:36 PM, Carl Eugen Hoyos wrote:
> > Dragos Iordache ...> writes:
> > > The stream is not showing and the recorded video does not
> > > allow seeking, it just freezes and cannot be played.
> >
> > Can
Dragos Iordache writes:
> If my output is a file ("test.h264") then everything
> works ok.
Does that mean if you feed test.h264 into ffmpeg to
produce the rtmp stream that you need (is that correct?),
it works fine, but if you call your application that
uses the libav* libraries it does not
Hendrik Schreiber writes:
> On Windows, the scheme part (file:) is always followed
> by a bunch of slashes, usually three (file:///),
three sounds like a very unlikely number to me.
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Mark Stevans writes:
> When playing unreliable H264 streams with FFPlay, I
> seem to get core-dumps randomly every few hours.
This sounds important, please provide the necessary
information as explained on
http://ffmpeg.org/bugreports.html
A sample would be useful (the size limitation
menti
Carl Eugen Hoyos writes:
> Mark Stevans ...> writes:
>
> > When playing unreliable H264 streams with FFPlay, I
> > seem to get core-dumps randomly every few hours.
>
> This sounds important, please provide the necessary
> information as explained on
> htt
Mark Stevans writes:
> It takes hours of testing to generate a stack trace
I am not sure I understand: The additional effort
should be far below five minutes, could you
elaborate?
> And it's very difficult to get a clip for reproduction,
> as this is a live stream running for hours.
rtmpdum
Mark Stevans writes:
> when I said "core-dump", I don't mean an actual
> core-dump on disk. I'm running under Windows 7
> here, debugging with WinDbg
gdb works fine on Windows (7), it would also allow
to produce a useful backtrace (and disassembly and
register content) for a recorded st
Mark Stevans writes:
> Frankly, I don't understand how patches could be
> ignored on TRAC, yet observed in "ffmpeg-devel".
I was just describing what experience tells me.
> But I will send my patch there
It appears that I was unclear again, sorry about that!
Bug reports are not welcome on ffm
Paul B Mahol writes:
> Are you enjoying yourself?
You mean compared to you when you (intentionally!)
commit other people's patches?
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Mark Stevans writes:
> > gdb works fine on Windows (7)
>
> I spent days trying to debug earlier bugs with
> Windows GDB, but couldn't get decent stack
> traces -- I tried every possible debugging
> flag and symbol format to no avail.
That surprises me:
I am regularly using gdb to debug on Wi
Taha Ansari writes:
> I have run this application with existing mp4
> files as input, and it properly extracts audio,
> and encodes to mp4 (audio only:AAC), or even
> directly in AAC format (i.e. test.aac also
> works). But when I tried running it on mp3
> files, output clip plays faster tha
Niu Licheng writes:
> i don't suggest using libstagefright in ffmpeg. i
> guess there would be oncompatible on many devices.
Could you elaborate?
I don't know much about Android and libstagefright
but I don't remember any reports that it does not
work.
Carl Eugen
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Abel Alonso writes:
> But once I get FFmpeg compiled. Have I to change
> my current code to ask FFmpeg for use
> libstagefright decoder?
I have never tried it, but isn't it sufficient to
request the decoder "libstagefright_h264" instead
of the decoder "h264" ?
Carl Eugen
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Taha Ansari writes:
> ffprobe version N-47062-g26c531c Copyright (c) 2007-2012
This looks outdated.
The aac decoder of current git head outputs FLTP iirc.
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... ... writes:
> So how to define the encoding tweaks which will
> minimize the lost of quality ?
Use -qscale 2
Please do not top-post here, Carl Eugen
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Abel Alonso writes:
> Yes it's sufficient to requesst the decoder, but I'm
> getting a crash when trying to decode the video
Can you reproduce the crash with ffmpeg (the application)?
Please do not top-post here, Carl Eugen
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Abel Alonso writes:
> As you can see, I had to enable the memalgin-hack to
> get the app built. I did it because without that flag,
> the file libavutil/mem.c didn't compile successfully
Please provide the error report, but please test
current git head first, your version looks old.
What too
Abel Alonso writes:
> I've checkout the current git head and
> libstagefright.cpp doesn't compile.
Thank you, this looks like an important report!
Didn't you write earlier that there is a problem
related to posix_memalign?
I only saw the following error (and closely
related ones):
> libavco
Abel Alonso writes:
> I've checkout the current git head and libstagefright.cpp
> doesn't compile.
I created ticket #2709, could you test version 2e7bc9c ?
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Abel Alonso writes:
> 2013/6/25 Carl Eugen Hoyos
>
> I created ticket #2709, could you test version 2e7bc9c ?
>
> With the version 2e7bc9c I get the posix_memalign error again.
What is the output for the following two commands?
$ grep -i alloc config.h
$ grep -i align conf
Abel Alonso writes:
> #define HAVE_POSIX_MEMALIGN 1
How does the part of config.log look like
starting with "check_func posix_memalign"?
Thank you and sorry for my comment on trac,
I couldn't resist, Carl Eugen
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Alex Cohn writes:
> BTW, you can safely remove all references to cxx-stl in
> your ./configure enchantment, because ffmpeg has not C++.
Is this also true if you want to use libstagefright?
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Gonzalo Garramuno writes:
> I've gotten to the point in my player in that I want to
> add support to play DVDs.
> I was wondering if someone who has done this could
> provide some general help.
There is a patch that you could work on:
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/9375
... ... writes:
> I am working on a project using ffmpeg and when I compiled,
> i get the following error :
> /usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libavcodec.so:
> undefined reference to `avpriv_update_lls LIBAVUTIL_52'
You are mixing versions of libavcodec and libavutil
that a
... ... writes:
> libavcodec.so.55 (libc6,x86-64) => /usr/local/lib/libavcodec.so.55
> libavcodec.so.55 (libc6,x86-64) => /usr/lib/libavcodec.so.55
As said, there is a bug in FFmpeg, but the way libavcodec
libraries are installed on your system is guaranteed to
fail (is also buggy).
Carl Euge
... ... writes:
> > you must make sure the libav* match the header when compiling
> > your code. you may add "-v" option to see details
>
> I tryied the "ffmpeg -v" command and I get the following answer
(Unrelated: Note that -v is the option to set the verboseness
of all FFmpeg binaries, it
Pavel Vazharov writes:
> ./configure
A few unrelated comments (your explanations may
help improving the configure script):
> --arch=x86
> --target-os=qnx
Is this really needed?
> --enable-static
> --disable-shared
This is the default (unneeded).
> --disable-everything
> --disable-programs
Abel Alonso writes:
> I've checkout the current git head and
> libstagefright.cpp doesn't compile.
Could you test again?
This may have been fixed.
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Abel Alonso writes:
> > Could you test again?
>
> libstagefright.cpp compiles now, but I'm still getting
> the posix_memalign error when compiling libavutil/mem.c,
> but I guess that is something related with my
> environment configuration.
Iirc, you were able to work-around that problem:
Doe
Pavel Vazharov writes:
> I don't think that the optimizations are disabled.
You misunderstood:
I did not ask you if you disabled optimizations, I
asked you if you disabled them intentionally
because you also disabled debugging and debugging
normally is the only reason why developers want
to
Pavel Vazharov writes:
> Include the log file "config.log" produced by configure
> as this will help solving the problem
The last 25 lines should be enough.
Please stop top-posting, it is considered rude here,
Carl Eugen
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Carl Eugen Hoyos writes:
> > --arch=x86
> > --target-os=qnx
>
> Is this really needed?
To rephrase this question:
What do "uname -m" and "uname -s" report?
Carl Eugen
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Libav-use
Jie Zhang writes:
> Any one knows what part of ffmpeg lib use
> GPL instead of LGPL?
Please see the LICENSE file in your checkout.
Carl Eugen
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Pavel Vazharov writes:
> check_ld cc
> check_cc
> BEGIN /tmp/ffconf..localhost..22065188.c
> 1 int main(void){ return 0; }
> END /tmp/ffconf..localhost..22065188.c
> gcc -c -o /tmp/ffconf..localhost..22065188.c
> gcc: no input files
Please find the following line in the function
"check_cc
Pavel Vazharov writes:
> # uname -m
> x86pc
> # uname -s
> QNX
Both are supported, so it should not be necessary
to set --arch or --target-os
Carl Eugen
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Pavel Vazharov writes:
> check_cmd $ld $LDFLAGS $flags $(ld_o $TMPE) $TMPO $libs $extralibs
>
> should become
>
> check_cmd $ld $LDFLAGS $flags -o $TMPE $TMPO $libs $extralibs.
You are correct, the same problem
(but another commit).
Carl Eugen
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Pavel Vazharov writes:
> # ./configure
> Memory fault (core dumped)
Is this the whole output?
Or are you possibly not waiting for the rest to come?
[...]
> -Werror=vla -c -o /tmp/ffconf..localhost..16134179.o
> /tmp/ffconf..localhost..16134179.c
The reason I ask is that my config.log also en
Pavel Vazharov writes:
> As you could see I waited about 3 minutes and there
> was no other visual output on the screen and the
> config.log ending was the same. I could provide
> screen shots as a prove of my words, too.
That wasn't what I meant, sorry.
(There just was no prompt in your orig
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