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a1a87b7a24
Allows demuxing UHD F1000000000:33333333 fps yuvj420p files
ffmpeg (at HEAD as of now) is creating this:
```
$ ffmpeg -y -i source.265 /tmp/foo.y4m >& /dev/null
...
$ xxd /tmp/raw.y4m |less
00000000: 5955 5634 4d50 4547 3220 5731 3932 3020 YUV4MPEG2 W1920
00000010: 4831 3038 3020 4631 3030 3030 3030 3030 H1080 F100000000
00000020: 303a 3333 3333 3333 3333 2049 7020 4130 0:33333333 Ip A0
00000030: 3a30 2043 3432 306d 7065 6732 2058 5953 :0 C420mpeg2 XYS
00000040: 4353 533d 3432 304d 5045 4732 2058 434f CSS=420MPEG2 XCO
00000050: 4c4f 5252 414e 4745 3d4c 494d 4954 4544 LORRANGE=LIMITED
00000060: 0a46 5241 4d45 0a82 8282 8282 8282 8282 .FRAME..........
...
```
Which cannot be parsed by the same ffmpeg decoder:
```
$ ffmpeg -i /tmp/foo.y4m /tmp/bar.y4m
...
[yuv4mpegpipe @ 0x2b69a40] Header too large.
/tmp/foo.y4m: Invalid argument
```
This is kicking the ball (per 0b1ff3265e),
but seems to work.
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
- ffplay is a minimalistic multimedia player.
- ffprobe is a simple analysis tool to inspect multimedia content.
- Additional small tools such as
aviocat,ismindexandqt-faststart.
Documentation
The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Examples
Coding examples are available in the doc/examples directory.
License
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
Contributing
Patches should be submitted to the ffmpeg-devel mailing list using
git format-patch or git send-email. Github pull requests should be
avoided because they are not part of our review process and will be ignored.