[FFmpeg-trac] #726(undetermined:new): support for copying SMPTE 436M caption tracks
FFmpeg
trac at avcodec.org
Fri Dec 9 16:13:01 CET 2011
#726: support for copying SMPTE 436M caption tracks
-------------------------------------+-------------------------------------
Reporter: dericed | Type:
Status: new | enhancement
Component: | Priority: wish
undetermined | Version: git-
Keywords: | master
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
This is a part 2 to http://ffmpeg.org/trac/ffmpeg/ticket/682.
I'm working with media from XDCam discs which contain an MXF with mpeg2
video, 8 pcm audio tracks, and a caption track using SMPTE 436M. I just
need to cut these files given an in point and duration and copy all tracks
to a new file (using -map 0 -c copy).
For XDCam MXF files the caption track is not recognized:
{{{
[mxf @ 0x101893800] track 9: could not find essence container ul, codec
not currently supported in container
}}}
and subsequently the copy fails with
{{{
Could not write header for output file #0 (incorrect codec parameters ?)
}}}
I need the preserve the captions but would also like to use ffmpeg to this
task.
Full output (first 5MB of a sample attached):
{{{
ffmpeg -ss 300 -t 30 -i ELCO0378.mxf -map 0 -c copy trimmed.mxf
ffmpeg version N-31468-g31c55c5, Copyright (c) 2000-2011 the FFmpeg
developers
built on Dec 8 2011 08:46:52 with gcc 4.2.1 (Apple Inc. build 5666)
(dot 3)
configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
--enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables
--cc=/usr/bin/gcc-4.2 --enable-libx264 --enable-libfaac --enable-
libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-
libxvid --disable-ffplay
libavutil 51. 30. 0 / 51. 30. 0
libavcodec 53. 41. 2 / 53. 41. 2
libavformat 53. 24. 0 / 53. 24. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 51. 0 / 2. 51. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[mxf @ 0x10180f200] could not resolve sub descriptor strong ref
[mxf @ 0x10180f200] source track 11: stream 9, no descriptor found
Input #0, mxf, from 'ELCO0378.mxf':
Duration: 00:28:50.89, start: 0.000000, bitrate: 60317 kb/s
Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 1920x1080 [SAR 1:1
DAR 16:9], 50000 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 59.94 tbc
Stream #0:1: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:2: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:3: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:4: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:5: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:6: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:7: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:8: Audio: pcm_s24le, 48000 Hz, 1 channels, s32, 1152 kb/s
Stream #0:9: Data: none
[mxf @ 0x101893800] track 9: could not find essence container ul, codec
not currently supported in container
Output #0, mxf, to 'trimmed.mxf':
Metadata:
encoder : Lavf53.24.0
Stream #0:0: Video: mpeg2video, yuv422p, 1920x1080 [SAR 1:1 DAR 16:9],
q=2-31, 50000 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
Stream #0:1: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:2: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:3: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:4: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:5: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:6: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:7: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:8: Audio: pcm_s24le, 48000 Hz, 1 channels, 1152 kb/s
Stream #0:9: Data: none
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (copy)
Stream #0:3 -> #0:3 (copy)
Stream #0:4 -> #0:4 (copy)
Stream #0:5 -> #0:5 (copy)
Stream #0:6 -> #0:6 (copy)
Stream #0:7 -> #0:7 (copy)
Stream #0:8 -> #0:8 (copy)
Stream #0:9 -> #0:9 (copy)
Could not write header for output file #0 (incorrect codec parameters ?)
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/726>
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