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Rémi Denis-Courmont 3606e592ea lavc/h264dsp: R-V V 8-bit h264_weight_pixels There are two implementations here: - a generic scalable one processing two columns at a time, - a specialised processing one (fixed-size) row at a time. Unsurprisingly, the generic one works out better with smaller widths. With larger widths, the gains from filling vectors are outweighed by the extra cost of strided loads and stores. In other words, memory accesses become the bottleneck. T-Head C908: h264_weight2_8_c: 54.5 h264_weight2_8_rvv_i32: 13.7 h264_weight4_8_c: 101.7 h264_weight4_8_rvv_i32: 27.5 h264_weight8_8_c: 197.0 h264_weight8_8_rvv_i32: 75.5 h264_weight16_8_c: 385.0 h264_weight16_8_rvv_i32: 74.2 SpacemiT X60: h264_weight2_8_c: 48.5 h264_weight2_8_rvv_i32: 8.2 h264_weight4_8_c: 90.7 h264_weight4_8_rvv_i32: 16.5 h264_weight8_8_c: 175.0 h264_weight8_8_rvv_i32: 37.7 h264_weight16_8_c: 342.2 h264_weight16_8_rvv_i32: 66.0		2024-07-09 18:03:29 +03:00
compat	…
doc	lavf: deprecate avformat_transfer_internal_stream_timing_info()	2024-07-09 11:14:47 +02:00
ffbuild	…
fftools	fftools/ffmpeg_mux_init: default to input timebase for streamcopy	2024-07-09 11:14:08 +02:00
libavcodec	lavc/h264dsp: R-V V 8-bit h264_weight_pixels	2024-07-09 18:03:29 +03:00
libavdevice	avdevice/v4l2: add limited support for multiplanar API	2024-07-04 11:09:53 +02:00
libavfilter	avfilter/af_aderivative: Free out on error	2024-07-07 23:36:30 +02:00
libavformat	lavf: deprecate avformat_transfer_internal_stream_timing_info()	2024-07-09 11:14:47 +02:00
libavutil	avutil/hwcontext_videotoolbox: Fix version check	2024-07-09 21:39:09 +08:00
libpostproc	…
libswresample	swresample/swresample: Rectify invalid function in the documentation	2024-07-02 21:57:17 +02:00
libswscale	swscale/swscale: Use ptrdiff_t for linesize computations	2024-07-07 23:36:30 +02:00
presets	…
tests	fftools/ffmpeg_mux_init: default to input timebase for streamcopy	2024-07-09 11:14:08 +02:00
tools	tools/coverity: Phase 1 study of anti-halicogenic for coverity av_rescale()	2024-07-07 23:36:27 +02:00
.gitattributes	…
.gitignore	…
.mailmap	…
CONTRIBUTING.md	…
COPYING.GPLv2	…
COPYING.GPLv3	…
COPYING.LGPLv2.1	…
COPYING.LGPLv3	…
CREDITS	…
Changelog	Changelog: add D3D12VA HEVC encoder changelog	2024-07-02 14:15:12 +02:00
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	MAINTAINERS: add myself to the general developers list	2024-07-07 23:36:27 +02:00
Makefile	…
README.md	…
RELEASE	…
configure	avcodec: add D3D12VA hardware HEVC encoder	2024-07-02 14:15:12 +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.