Am 13.12.2015 um 14:18 schrieb Moritz Barsnick: > On Sun, Dec 13, 2015 at 11:54:32 +0100, Stefan Pöschel wrote: >> So far an AC-3 elementary stream is refered to in the PMT according to >> System A (ATSC). An E-AC-3 ES in contrast is embedded the System B (DVB) way. > > Interesting, that's apparently the reason why my (DVB-)PVR didn't ever > recognize AC-3 in MPEG-TS. See > https://ffmpeg.org/pipermail/ffmpeg-user/2015-October/028812.html > E-AC-3 in MPEG-TS seems to have worked (I just tried it - successfully > - for the first time), I didn't realize that. > > With your patch, I can now successfully play AC-3 and E-AC-3 with that > player, when using the "-mpegts_flags system_b" (and kill this > capability when not using it).
I've had the same problem which was the motivation to take a look into it. >> To fix this inconsistency, this commit changes the default E-AC-3 behaviour >> to >> use the ATSC way, too. Furthermore a new flag is added to optionally select >> the >> DVB way (regarding both codecs and possible further differences in the >> future). > > I never found the patch mentioned in the thread, and don't know enough > about the differences myself. There is a bug report of libav regarding this problem, together with a patch from 2011 which just changes the AC-3 signalling from ATSC to DVB: https://bugzilla.libav.org/show_bug.cgi?id=73 Yesterday I therefore posted a patch to libav-devel (similar to this one for FFmpeg-devel) for switching between ATSC and DVB: https://lists.libav.org/pipermail/libav-devel/2015-December/073574.html Regards, Stefan _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
