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https://github.com/FFmpeg/FFmpeg.git
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Zhao Zhili
670ff6c7ce
avcodec/nvenc: rework on DTS generation
Before the patch, the method to generate DTS only works with timebase equal to 1/fps. With timebase like 1/1000 ./ffmpeg -i foo.mp4 -an -c:v h264_nvenc -enc_time_base 1/1000 bar.mp4 pts 0 dts -3 pts 160 dts 37 pts 80 dts 77 pts 40 dts 117 <-- invalid pts 120 dts 157 pts 320 dts 197 pts 240 dts 237 pts 200 dts 277 <-- invalid pts 280 dts 317 <-- invalid The generated DTS can be larger than PTS, since it only reorder the input PTS and minus the number of frame delay, which doesn't take timebase into account. It should minus the "time" of frame delay. 9a245bd trying to fix the issue, but the implementation is incomplete, which only use time_base.num. Then it got reverted by ac7c265b33b. After this patch: pts 0 dts -120 pts 160 dts -80 pts 80 dts -40 pts 40 dts 0 pts 120 dts 40 pts 320 dts 80 pts 240 dts 120 pts 200 dts 160 pts 280 dts 200 Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>
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FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodec
provides implementation of a wider range of codecs.libavformat
implements streaming protocols, container formats and basic I/O access.libavutil
includes hashers, decompressors and miscellaneous utility functions.libavfilter
provides means to alter decoded audio and video through a directed graph of connected filters.libavdevice
provides an abstraction to access capture and playback devices.libswresample
implements audio mixing and resampling routines.libswscale
implements 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
,ismindex
andqt-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.
Languages
C
90.3%
Assembly
7.8%
Makefile
1.3%
C++
0.2%
Objective-C
0.2%
Other
0.1%