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Andreas Rheinhardt bc6838deb9 avcodec/fraps: Use unchecked bitstream reader 
The fraps decoder already checked for overreads manually (and errored
out in this scenario), yet it still enabled implicit checks, leading to
worse performance and more code size.

This commit disables the implicit bitstream reader checks. For the
sample [1] this improves performance from 195105896 to 155851561
decicycles for Clang 10 and from 222801887 to 168270467 decicycles when
compiled with GCC 9.3. These values are the average of 10 runs each
looping ten times over the input.

[1]: samples.ffmpeg.org/ffmpeg-bugs/trac/ticket2593/fraps_flv1_decoding_errors.avi

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
2020-09-26 21:10:45 +02:00
compat
doc avdevice/decklink_dec: add support for querying RP188 High Frame Rate timecode 2020-09-13 18:06:54 +02:00
ffbuild
fftools fftools/ffprobe: use av_timecode_make_smpte_tc_string2 2020-09-13 17:51:57 +02:00
libavcodec avcodec/fraps: Use unchecked bitstream reader 2020-09-26 21:10:45 +02:00
libavdevice avdevice/lavfi: av_malloc -> av_malloc_array 2020-09-21 09:30:55 +08:00
libavfilter dnn: add a new interface DNNModel.get_output 2020-09-21 21:26:56 +08:00
libavformat avformat/http: fix memleak 2020-09-25 10:21:28 +02:00
libavresample
libavutil avutil/pixfmt: improve definition of AVColorRange 2020-09-23 19:14:45 +03:00
libpostproc
libswresample
libswscale
presets
tests avformat/movenc: use more fall-back values for average bit rate fields 2020-09-22 18:25:44 +03:00
tools tools/target_dec_fuzzer: Adjust VQA threshold 2020-09-19 00:40:56 +02:00
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Changelog lavc/qsvdec: Add QSV AV1 decoder 2020-09-26 23:42:39 +08:00
configure lavc/qsvdec: Add QSV AV1 decoder 2020-09-26 23:42:39 +08:00
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README.md

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 a mean to alter decoded Audio and Video through chain of 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 and qt-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.