Re: Bug#567863: RFP: Handbrake - video transcoder
On Mo, Okt 10, 2011 at 07:12:23 (CEST), Rogério Brito wrote: Hi there. I'm just including the Multimedia team, as they don't seem to be subscribed to this bug. On Oct 09 2011, Ralf Jung wrote: Can't be packaged as x264 video codec and aac and mp3 audio codec aren't free. How can that be, I can decode and encode mp3 and view MPEG4 videos without problems, installing only packages from the debian repositories...? Ralf, I think that when Christian wrote that, we didn't have x264 and lame in the main archive. Things have changed since this bug was originally filed. Once we have faac (if it's acceptable for our archive), then it would be lovely to have a new version of handbrake (e.g., from their git tree) in the archive, as it is a frontend for multimedia libraries that quite possibly passes the useable by mom and dad usability test, especially since it comes with sensible presets. I don't think we'll ever have faac in Debian because of its license. See https://bugs.edge.launchpad.net/ubuntu/+source/faac/+bug/374900 for details. Luckily, we have vo-aacenc (http://packages.debian.org/sid/main/libvo-aacenc0), which is the aac encoder from android and can encode aac just fine. As far as I know, Handbrake does not even implement any of this. It uses gstreamer, ffmpeg and others. Well, it does implement some things, like, for instance, their decombing routines, which is very nice for some interlaced and almost-interlaced things. As a side-effect, this decombing of theirs results in variable frame rates, which potentially feeds fewer frames to x264 (or whatever encoder is in question), making the bitrates tend to lower. Another side-effect that people may not appreciate because they run fast architectures is that outputting fewer frames, some slower video cards (e.g., in a powerpc machine) can have a fighting chance of playing some videos. I don't know of any implementation of handbrake's decombing algorithm in other software (e.g., ffmpeg/libav, mplayer, mplayer2, gstreamer etc.) Does anyone know? The other transcoders (arista, transmaggedon) are jokes regarding the amount of configurability that they allow. I agree that Handbrake is a really great tool. Actually, I did take a look at the sources and found out, that it would require a lot of efford to get it into debian. The reason is that the ship a lot of patched libraries that we already have in debian. I don't think this code duplication is acceptable for the Debian system. As for this RFP, I think any potential packager should identify the included libraries and start upstreaming the included patches. Then, try to build them against the libraries that Debian already ships. -- Gruesse/greetings, Reinhard Tartler, KeyID 945348A4 ___ pkg-multimedia-maintainers mailing list pkg-multimedia-maintainers@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-multimedia-maintainers
Re: Bug#567863: RFP: Handbrake - video transcoder
Hi, okay, thanks a lot for the update - I was not aware that the position wrt such codecs changed so drastically, but I am glad to hear it. And I agree that handbrake would be a great addition, I use it whenever possible to do recode my videos. The package from the original author, designed for Ubuntu, works fine with Debian testing. I agree that Handbrake is a really great tool. Actually, I did take a look at the sources and found out, that it would require a lot of efford to get it into debian. The reason is that the ship a lot of patched libraries that we already have in debian. I don't think this code duplication is acceptable for the Debian system. That might explain why the executable is 16MiB in size... ;-) (it does not ship any .so files though) Kind regards, Ralf ___ pkg-multimedia-maintainers mailing list pkg-multimedia-maintainers@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-multimedia-maintainers
Re: Bug#567863: RFP: Handbrake - video transcoder
Hi there.
I'm just including the Multimedia team, as they don't seem to be subscribed
to this bug.
On Oct 09 2011, Ralf Jung wrote:
Can't be packaged as x264 video codec and aac and mp3 audio codec aren't
free.
How can that be, I can decode and encode mp3 and view MPEG4 videos without
problems, installing only packages from the debian repositories...?
Ralf, I think that when Christian wrote that, we didn't have x264 and lame
in the main archive. Things have changed since this bug was originally
filed.
Once we have faac (if it's acceptable for our archive), then it would be
lovely to have a new version of handbrake (e.g., from their git tree) in the
archive, as it is a frontend for multimedia libraries that quite possibly
passes the useable by mom and dad usability test, especially since it
comes with sensible presets.
As far as I know, Handbrake does not even implement any of this. It uses
gstreamer, ffmpeg and others.
Well, it does implement some things, like, for instance, their decombing
routines, which is very nice for some interlaced and almost-interlaced
things.
As a side-effect, this decombing of theirs results in variable frame rates,
which potentially feeds fewer frames to x264 (or whatever encoder is in
question), making the bitrates tend to lower.
Another side-effect that people may not appreciate because they run fast
architectures is that outputting fewer frames, some slower video cards
(e.g., in a powerpc machine) can have a fighting chance of playing some
videos.
I don't know of any implementation of handbrake's decombing algorithm in
other software (e.g., ffmpeg/libav, mplayer, mplayer2, gstreamer etc.) Does
anyone know?
The other transcoders (arista, transmaggedon) are jokes regarding the amount
of configurability that they allow.
Regards,
--
Rogério Brito : rbrito@{ime.usp.br,gmail.com} : GPG key 4096R/BCFC
http://rb.doesntexist.org : Packages for LaTeX : algorithms.berlios.de
DebianQA: http://qa.debian.org/developer.php?login=rbrito%40ime.usp.br
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