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| thuriel posted 2009 Oct 20 14:09 |
I need to put the video and audio streams of an MKV file into an MP4 container. So I tried:
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| $ ffmpeg -i video.mkv -vcodec copy -acodec copy video.mp4 |
But, what I get is this error message:
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| Could not write header for output file #0 (incorrect codec parameters ?) |
Does ffmpeg fail putting AC3 into the MP4 container? I know, initially MP4 did not support AC3 streams, but over a year ago they officially allowed AC3 to be enclosed in an MP4 (see http://en.wikipedia.org/wiki/Comparison_of_container_formats). So I expect ffmpeg to be aware of that and fulfill my wish! :D
Do I have to to specify any parameters to pack AC3 into MP4?
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| Baldrick posted 2009 Oct 20 14:16 |
What ffmpeg version are you using? You probably need a very new build.
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| Soopafresh posted 2009 Oct 20 14:27 |
AC3 in an MP4 container is a recent update to the spec. As Baldrick says, you need a recent version of FFMPEG to make it happen.
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| thuriel posted 2009 Oct 20 15:58 |
I compiled it from SVN (SVN-r20255) just three days ago:
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$ ffmpeg -version
FFmpeg version SVN-r20255, Copyright (c) 2000-2009 Fabrice Bellard, et al.
built on Oct 17 2009 02:49:24 with gcc 4.2.1 (Apple Inc. build 5646)
configuration: --enable-pthreads --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-gpl --enable-libxvid --enable-libx264 --enable-nonfree --enable-libfaac --enable-libfaad
libavutil 50. 3. 0 / 50. 3. 0
libavcodec 52.37. 0 / 52.37. 0
libavformat 52.39. 2 / 52.39. 2
libavdevice 52. 2. 0 / 52. 2. 0
libswscale 0. 7. 1 / 0. 7. 1
FFmpeg SVN-r20255
libavutil 50. 3. 0 / 50. 3. 0
libavcodec 52.37. 0 / 52.37. 0
libavformat 52.39. 2 / 52.39. 2
libavdevice 52. 2. 0 / 52. 2. 0
libswscale 0. 7. 1 / 0. 7. 1 |
I hope this is recent enough :D :/
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| Baldrick posted 2009 Oct 20 16:17 |
Could you list what the mkv contain? ffmpeg should show some info.
Or maybe try mp4box if you can find a mac version.
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| thuriel posted 2009 Oct 20 16:26 |
I'd prefer to use ffmpeg :/
Here is the complete output:
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$ ffmpeg -i video.mkv -vcodec copy -acodec copy video.mp4
FFmpeg version SVN-r20255, Copyright (c) 2000-2009 Fabrice Bellard, et al.
built on Oct 17 2009 02:49:24 with gcc 4.2.1 (Apple Inc. build 5646)
configuration: --enable-pthreads --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-gpl --enable-libxvid --enable-libx264 --enable-nonfree --enable-libfaac --enable-libfaad
libavutil 50. 3. 0 / 50. 3. 0
libavcodec 52.37. 0 / 52.37. 0
libavformat 52.39. 2 / 52.39. 2
libavdevice 52. 2. 0 / 52. 2. 0
libswscale 0. 7. 1 / 0. 7. 1
Seems stream 0 codec frame rate differs from container frame rate: 59.94 (60000/1001) -> 29.97 (30000/1001)
Input #0, matroska, from 'video.mkv':
Duration: 00:03:14.59, start: 0.000000, bitrate: N/A
Stream #0.0(eng): Video: h264, yuv420p, 720x480, PAR 8:9 DAR 4:3, 29.97 tbr, 1k tbn, 59.94 tbc
Stream #0.1(eng): Audio: ac3, 48000 Hz, 6 channels, s16
Stream #0.2(eng): Audio: ac3, 48000 Hz, 2 channels, s16
Stream #0.3(eng): Audio: ac3, 48000 Hz, 2 channels, s16
Stream #0.4(eng): Audio: ac3, 48000 Hz, 2 channels, s16
File 'video.mp4' already exists. Overwrite ? [y/N] y
[mp4 @ 0x1076800]track 1: codec frame size is not set
Output #0, mp4, to 'video.mp4':
Stream #0.0(eng): Video: libx264, yuv420p, 720x480 [PAR 8:9 DAR 4:3], q=2-31, 1k tbn, 1k tbc
Stream #0.1(eng): Audio: ac3, 48000 Hz, 6 channels, s16
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Could not write header for output file #0 (incorrect codec parameters ?) |
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| thuriel posted 2009 Nov 20 05:17 |
:\
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| Baldrick posted 2009 Nov 20 05:28 |
Try add
-f mp4 -r 29.970 -s 720x400 -aspect 4:3
and see if it makes any difference.
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| thuriel posted 2009 Nov 21 05:55 |
Thanks for your help, but I get exactly the same error message :/
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| Could not write header for output file #0 (incorrect codec parameters ?) |
Good example for why upgrading not always is a good idea.
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| Herve posted 2009 Nov 21 08:31 |
| thuriel : |
| : |
[...]
[mp4 @ 0x1076800]track 1: codec frame size is not set
[...]
Could not write header for output file #0 (incorrect codec parameters ?) |
|
set size according to your input file:
-s 720x480
my advices will be to change audio file format (AC3 in .mp4 is not well handle by most players), prefer aac
and add a "h264 magic cleaner"
->
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| ffmpeg -i video.mkv -s 720x480 -vcodec copy -vbsf h264_mp4toannexb -acodec aac -ab 384k -y video.mp4 |
and depending on displayed errors, add some others args (like framerate, etc)
bye
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| pepegot1 posted 2009 Nov 21 08:42 |
Try WinFF
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