Opened 4 years ago

Closed 4 years ago

Last modified 4 years ago

#2160 closed defect (duplicate)

ffmpeg produces mpeg files with audio not playable by some players

Reported by: kadmandux Owned by:
Priority: normal Component: avformat
Version: unspecified Keywords: mpegps
Cc: Blocked By:
Blocking: Reproduced by developer: no
Analyzed by developer: no

Description

Summary of the bug:

I'm joining (concat) some mpeg2 video files with ac3 audio (from my digital camera) without re-encoding. The resulting files have no sound if you play them with mplayer or HP Video (from HP Media Suite).

Mplayer says this:
MPEG: No audio stream found -> no sound.

How to reproduce:

ffmpeg -f concat -i list.txt -c:a copy -c:v copy video.mpg

Even more simple, without concat involved:

ffmpeg -i input.mpg -c:a copy -c:v copy video.mpg

ffmpeg version N-48886-g5ce023b Copyright (c) 2000-2013 the FFmpeg developers
  built on Jan 14 2013 19:16:33 with gcc 4.7.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libg
sm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --e
nable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --e
nable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --en
able-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable
-libxavs --enable-libxvid --enable-zlib --enable-filter=frei0r
  libavutil      52. 14.100 / 52. 14.100
  libavcodec     54. 89.100 / 54. 89.100
  libavformat    54. 59.107 / 54. 59.107
  libavdevice    54.  3.102 / 54.  3.102
  libavfilter     3. 32.100 /  3. 32.100
  libswscale      2.  1.103 /  2.  1.103
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100}}}

I solved the problem with the workaround listed here:

http://www.das-werkstatt.com/forum/werkstatt/viewtopic.php?f=7&t=1834

The key is to ask for a target format:

ffmpeg -i input.mpg -target pal-dvd  -c:a copy -c:v copy video.mpg

The input files have contents like this:

Input #0, mpeg, from 'm2u00117.mpg':
  Duration: 00:01:26.36, start: 0.118222, bitrate: 7858 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 64:45 DA
R 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s

Change History (2)

comment:1 follow-up: Changed 4 years ago by cehoyos

  • Component changed from undetermined to avformat
  • Keywords mpegps added; audio interleave removed
  • Resolution set to duplicate
  • Status changed from new to closed

Apart from missing complete, uncut console output, this looks like a duplicate of ticket #1720. Please test again once that ticket is resolved.

comment:2 in reply to: ↑ 1 Changed 4 years ago by kadmandux

Thank you. Sorry for duplicate report, I found ticket #1720 after I sent mine.

I posted there a comment, because I found a workaround for which there is a link in my ticket.

Regards.

Last edited 4 years ago by kadmandux (previous) (diff)
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