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Andreas Rheinhardt 65f3bc9e7e avcodec/clearvideo: Avoid allocations when decoding tiles 
Up until now, the ClearVideo decoder separates parsing tiles
and actually using the parsed information: The information is
instead stored in structures which are constantly allocated
and freed. This commit changes this to use the information
immediately, avoiding said allocations. This e.g. reduced
the amount of allocations for [1] from 2,866,462 to 24,720.
For said sample decoding speed improved by 143%.

[1]: https://samples.ffmpeg.org/V-codecs/UCOD/AccordianDance-300.avi

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2022-11-10 00:39:43 +01:00
compat compat/cuda: switch from powf to __powf intrinsic 2022-09-03 20:27:34 +02:00
doc avfilter/af_speechnorm: implement rms option 2022-11-07 08:32:48 +01:00
ffbuild configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
fftools fftools/ffprobe: Loop over correct number of streams when flushing decoders 2022-11-07 16:13:45 +00:00
libavcodec avcodec/clearvideo: Avoid allocations when decoding tiles 2022-11-10 00:39:43 +01:00
libavdevice avdevice/avfoundation: convert to new channel layout-API 2022-11-08 14:08:05 -03:00
libavfilter avfilter/vf_hqdn3d: Fix left-shift of negative numbers 2022-11-09 17:39:00 +01:00
libavformat avformat/replaygain: avoid undefined / negative abs 2022-11-04 22:44:16 +01:00
libavutil avutil/tx: use llrintf() to convert a float into a 64 bit integer 2022-11-08 14:24:49 -03:00
libpostproc postproc/postprocess_template: Fix alignment 2022-11-09 17:39:00 +01:00
libswresample swresample/rematrix: support mixing top front left/right channels 2022-11-03 19:39:52 -03:00
libswscale swscale/utils: Remove obsolete 3DNow reference 2022-11-09 17:39:00 +01:00
presets
tests fate/video: vqc testcase 2022-11-07 16:08:35 +11:00
tools tools/target_dec_fuzzer: Adjust threshold for FFV1 2022-10-20 21:42:21 +02:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.gitignore gitignore: add config_components.h 2022-03-17 18:35:41 -03:00
.mailmap mailmap: stop git lying about who I commit things as 2022-11-04 19:37:46 +01:00
.travis.yml Merge commit '899ee03088' 2019-03-14 15:53:16 -03:00
Changelog Changelog: add forgotten nvenc av1 entry 2022-11-07 20:16:42 +01:00
configure avcodec/mpegvideo_enc: Move initializing QpelDSPCtx to mpeg4videoenc.c 2022-11-06 17:41:26 +01:00
CONTRIBUTING.md Add CONTRIBUTING.md 2016-09-18 10:02:13 +01:00
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md INSTALL.md: Fix Markdown formatting 2019-01-31 10:29:16 -09:00
LICENSE.md avfilter/vf_geq: Relicense to LGPL 2019-12-28 11:20:48 +01:00
MAINTAINERS libavcodec: remove mdct15 2022-11-06 14:39:41 +01:00
Makefile configure: probe RISC-V Vector extension 2022-09-27 13:19:52 +02:00
README.md README: fix typo and description of libavfilter 2021-10-08 09:44:34 +05:30
RELEASE RELEASE: update after 5.1 branch 2022-07-13 00:31:42 +02:00

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 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 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.