[mythtv] ffmpeg sync

Steven Adeff adeffs.mythtv at gmail.com
Fri Oct 12 17:57:23 UTC 2007

On 10/11/07, Janne Grunau <janne-mythtv at grunau.be> wrote:
> Hi,
> the next ffmpeg sync is overdue and working H.264 PAFF (since 9th of
> october) in ffmpeg is an exellent opportunity.
> Almost 2000 revisions passed since the last merge and noteable changes
> beside PAFF are the updated ac3 decoder, dca decoder and slice-based
> parallelism in the H.264 decoder.
> With both H.264 changes playback of H.264 HDTV as used in Europe should
> be possible on most dual core processors. A 15mbit 1080p stream plays
> on a Athlon64 X2 2ghz with using between 50 and 70% cpu.
> There are tons of other changes (ape and atrac3 decoder, nut and
> matroska muxer, much cleanup and file splitting, ...) but those aren't
> that relevant to mythtv.
> The patch compiles cleanly on x86 and x86_64. Mpeg2 and H.264 recordings
> seems be without regressions. Plugins compiled fine but aren't tested.
> Please test and report any problems. Patches apply with -p2.
> http://www.grunau.be/ffmpeg_sync_10712_14666_0.diff.bz2
> simple multithreaded patch, threading must be enabled
> with --enable-ffmpeg-pthreads.
> http://www.grunau.be/0001-enable-multithreaded-video-stream-decoding.patch
> I still have some things to do before the patch can be applied:
> test plugins, especially dvd playback
> merge libavformat/mpegts.c many conflicts, is still r8742 plus our
> modifications
> review configure changes
> test ppc altivec build
> Janne

awesome news, since I recently upgraded to an Athlon X2 4200+ and am
overclocking it. sadly I don't think I'll have time to test the patch
before you move ahead with it more. but thanks for your work in this
area, hopefully this merge will get my x264 encoded files playing
properly without having to use mplayer.


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