MSG 2690
ISSUE 564
Created on 2008-07-31.03:45:37 by michael, last changed 2008-07-31.03:45:37 by michael.
https://roundup.mplayerhq.hu/roundup/ffmpeg/msg2690



FFmpeg (version r14481) has a problem with a few-second clip recorded from HDTV.

Command and output:
===============

$ ffmpeg -i error-decoding-frame-no-sync-byte.mpg test.mp4

FFmpeg version SVN-r14481-Televise, Copyright (c) 2000-2008 Fabrice Bellard, et al.
  configuration: --enable-memalign-hack --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-libmp3lame --enable-liba52 --enable-libxvid --enable-libfaac --enable-libfaad --enable-pthreads --enable-libx264 --disable-shared 
  libavutil version: 49.7.0
  libavcodec version: 51.62.0
  libavformat version: 52.18.0
  libavdevice version: 52.0.0
  built on Jul 31 2008 12:59:59, gcc: 4.0.1 (Apple Inc. build 5483)
No accelerated IMDCT transform found
[liba52 @ 0x1007610]Error decoding frame, no sync byte at begin
[mpegts @ 0x1002410]Could not find codec parameters (Audio: liba52)
Input #0, mpegts, from 'error-decoding-frame-no-sync-byte.mpg':
  Duration: 00:00:01.93, start: 16190.954589, bitrate: 5466 kb/s
  Program 1585 TEN HD
  Program 1589 TEN Digital
    Stream #0.0[0x200]: Video: mpeg2video, yuv420p, 720x576 [PAR 64:45 DAR 16:9], 9000 kb/s, 25.00 tb(r)
    Stream #0.1[0x28a](eng): Audio: mp2, 48000 Hz, stereo, 256 kb/s
    Stream #0.2[0x28b](eng): Audio: liba52, 48000 Hz, stereo, 256 kb/s
  Program 1592 TEN HD
Output #0, mp4, to 'test.mp4':
    Stream #0.0: Video: mpeg4, yuv420p, 720x576 [PAR 64:45 DAR 16:9], q=2-31, 200 kb/s, 25.00 tb(c)
    Stream #0.1(eng): Audio: libfaac, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Error while opening codec for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height

===============

FFmpeg was compiled with:
a52dec-0.7.4.tar.gz
faac-1.26.tar.gz
faad2-2.6.1.tar.gz
gpac-0.4.4.tar.gz
lame-3.98b8.tar.gz
xvidcore-1.1.3.tar.gz
x264-snapshot-20080730-2245.tar.bz2



I can successfully convert this clip using an older version of FFmpeg, bundled with the Mac OS X gui tool, FFMpegX:

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
  configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  libavutil version: 49.0.0
  libavcodec version: 51.9.0
  libavformat version: 50.4.0
  built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
ffmpeg      CVS
libavutil   3211264
libavcodec  3344640
libavformat 3277824

Output from this older version:

===================
Fmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
  configuration:  --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264 
  libavutil version: 49.0.0
  libavcodec version: 51.9.0
  libavformat version: 50.4.0
  built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
Input #0, mpegts, from 'error-decoding-frame-no-sync-byte.mpg':
  Duration: 00:00:01.8, start: 16190.954589, bitrate: 5630 kb/s
  Stream #0.0[0x200], 25.00 fps(r): Video: mpeg2video, yuv420p, 720x576, 9000 kb/s
  Stream #0.1[0x28a](eng): Audio: mp2, 48000 Hz, stereo, 256 kb/s
  Stream #0.2[0x28b](eng): Audio: ac3, 48000 Hz, stereo, 256 kb/s
Output #0, mp4, to 'test2.mp4':
  Stream #0.0, 25.00 fps(c): Video: mpeg4, yuv420p, 720x576, q=2-31, 200 kb/s
  Stream #0.1: Audio: aac, 48000 Hz, stereo, 64 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
[mpeg4 @ 0x54340c]removing common factors from framerate
Press [q] to stop encoding
frame=   55 q=31.0 Lsize=     260kB time=1.8 bitrate=1186.8kbits/s    
video:175kB audio:14kB global headers:0kB muxing overhead 37.528712%
==================


The sample clip has been uploaded to ftp://upload.mplayerhq.hu/MPlayer/incoming/issue-michael/error-decoding-frame-no-sync-byte.mpg