我有第三个流的文件，可能是来自 FCP 的一些元数据。这是 ffprobe 的输出：
ffprobe 00700.mov
ffprobe version 2.0.1 Copyright (c) 2007-2013 the FFmpeg developers
built on Aug 27 2013 20:17:24 with gcc 4.5 (SUSE Linux)
configuration: --enable-gpl --enable-shared --enable-libmp3lame --enable-libxvid --enable-libx264 --enable-nonfree --enable-postproc --enable-version3
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x806f860] multiple edit list entries, a/v desync might occur, patch welcome
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '00700.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2013-06-11 15:57:03
Duration: 00:02:41.56, start: 0.000000, bitrate: 48439 kb/s
Stream #0:0(eng): Video: mpeg2video (4:2:2) (xd5c / 0x63356478), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], 45873 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
creation_time : 2013-06-11 15:57:03
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 2 channels, s32, 2304 kb/s
Metadata:
creation_time : 2013-06-11 15:57:03
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
creation_time : 2013-06-11 15:58:45
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Unsupported codec with id 0 for input stream 2
现在我想剥离第三个流（流 2）
所以我使用：
ffmpeg -i 00700.mov -vcodec copy -acodec copy -map 0:0 -map 0:1 testout.mov
ffmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developers
built on Aug 27 2013 20:17:24 with gcc 4.5 (SUSE Linux)
configuration: --enable-gpl --enable-shared --enable-libmp3lame --enable-libxvid --enable-libx264 --enable-nonfree --enable-postproc --enable-version3
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x8086ca0] multiple edit list entries, a/v desync might occur, patch welcome
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '00700.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2013-06-11 15:57:03
Duration: 00:02:41.56, start: 0.000000, bitrate: 48439 kb/s
Stream #0:0(eng): Video: mpeg2video (4:2:2) (xd5c / 0x63356478), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], 45873 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
creation_time : 2013-06-11 15:57:03
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32, 2304 kb/s
Metadata:
creation_time : 2013-06-11 15:57:03
handler_name : Apple Alias Data Handler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
creation_time : 2013-06-11 15:58:45
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Output #0, mov, to 'testout.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf55.12.100
Stream #0:0(eng): Video: mpeg2video (xd5c / 0x63356478), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 45873 kb/s, 25 fps, 12800 tbn, 25 tbc
Metadata:
creation_time : 2013-06-11 15:57:03
handler_name : Apple Alias Data Handler
timecode : 01:00:00:00
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, 2304 kb/s
Metadata:
creation_time : 2013-06-11 15:57:03
handler_name : Apple Alias Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 45 fps=0.0 q=-1.0 size= 11470kB time=00:00:02.00 bitrate=46982.6kbitsframe= 99 fps= 99 q=-1.0 size= 25263kB time=00:00:04.00 bitrate=51738.5kbitsframe= 154 fps=101 q=-1.0 size= 38805kB time=00:00:06.12 bitrate=51942.3kbitsframe= 178 fps= 88 q=-1.0 size= 45189kB time=00:00:07.08 bitrate=52286.0kbitsframe= 211 fps= 82 q=-1.0 size= 53860kB time=00:00:09.00 bitrate=49024.2kbitsframe= 239 fps= 78 q=-1.0 size= 61190kB time=00:00:10.00 bitrate=50126.7kbitsframe= 269 fps= 73 q=-1.0 size= 68671kB time=00:00:11.00 bitrate=51140.9kbitsframe= 299 fps= 71 q=-1.0 size= 76513kB time=00:00:12.00 bitrate=52232.9kbitsframe= 332 fps= 69 q=-1.0 size= 83237kB time=00:00:13.24 bitrate=51501.1kbitsframe= 360 fps= 66 q=-1.0 size= 91908kB time=00:00:15.00 bitrate=50193.9kbits ...and so on till
frame= 4041 fps= 51 q=-1.0 size= 950203kB time=00:02:42.00 bitrate=48049.8kbitsframe= 4060 fps= 51 q=-1.0 Lsize= 955158kB time=00:02:42.40 bitrate=48181.4kbits/s
video:909397kB audio:45675kB subtitle:0 global headers:0kB muxing overhead 0.008987%
因此我再次使用 ffprobe：
ffprobe testout.mov
ffprobe version 2.0.1 Copyright (c) 2007-2013 the FFmpeg developers
built on Aug 27 2013 20:17:24 with gcc 4.5 (SUSE Linux)
configuration: --enable-gpl --enable-shared --enable-libmp3lame --enable-libxvid --enable-libx264 --enable-nonfree --enable-postproc --enable-version3
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'testout.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf55.12.100
Duration: 00:02:42.40, start: 0.000000, bitrate: 48181 kb/s
Stream #0:0(eng): Video: mpeg2video (4:2:2) (xd5c / 0x63356478), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], 45873 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
Metadata:
handler_name : DataHandler
timecode : 01:00:00:00
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32, 2304 kb/s
Metadata:
handler_name : DataHandler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
handler_name : DataHandler
timecode : 01:00:00:00
Unsupported codec with id 0 for input stream 2
为什么它没有剥离流 2？我遗漏了什么？
答案1
总的来说，我不知道为什么它没有按应有的方式映射。但我找到了解决方法：
ffmpeg -i 01300.mov -filter_complex "[0:v]null[video_out];[0:a]anull[audio_out]" -map [video_out] -map [audio_out] out.mov
看起来 ffmpeg 无法正确映射这个第三个流。
答案2
由于这个问题出现在谷歌搜索中，因此我来回答（以帮助其他寻找解决方案的人）。
从这张票开始，这个问题已经修复，https://trac.ffmpeg.org/ticket/5492-write_tmcd 0，您可以通过添加到 ffmpeg 命令来摆脱该轨道。
这专门针对Data (tmcd)轨道。对于其他轨道（字幕、一般数据等），结合使用-dn和-map -0:d类似命令应该会有所帮助。