You've already forked FFmpeg
mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-08-04 22:03:09 +02:00
40302cc35b
Benchmark with wasmtime: wasmtime checkasm --test=hevc_idct --benchmark hevc_idct_4x4_8_c: 20.8 ( 1.00x) hevc_idct_4x4_8_simd128: 10.2 ( 2.02x) hevc_idct_4x4_10_c: 21.0 ( 1.00x) hevc_idct_4x4_10_simd128: 10.2 ( 2.05x) hevc_idct_8x8_8_c: 198.0 ( 1.00x) hevc_idct_8x8_8_simd128: 41.5 ( 4.77x) hevc_idct_8x8_10_c: 197.8 ( 1.00x) hevc_idct_8x8_10_simd128: 41.8 ( 4.74x) hevc_idct_16x16_8_c: 1385.2 ( 1.00x) hevc_idct_16x16_8_simd128: 291.8 ( 4.75x) hevc_idct_16x16_10_c: 1375.0 ( 1.00x) hevc_idct_16x16_10_simd128: 281.2 ( 4.89x) hevc_idct_32x32_8_c: 13479.0 ( 1.00x) hevc_idct_32x32_8_simd128: 1541.5 ( 8.74x) hevc_idct_32x32_10_c: 13448.0 ( 1.00x) hevc_idct_32x32_10_simd128: 1541.5 ( 8.72x) Decoding test: 1. Without the optimization: $ wasmtime --wasi threads --dir=/ ./ffmpeg -cpuflags 0 -i 265.mp4 -an -t 120 -f null - -benchmark frame= 2880 fps= 94 q=-0.0 Lsize=N/A time=00:02:00.00 bitrate=N/A speed=3.92x 2. With the optimization: $ wasmtime --wasi threads --dir=/ ./ffmpeg -i 265.mp4 -an -t 120 -f null - -benchmark frame= 2880 fps=110 q=-0.0 Lsize=N/A time=00:02:00.00 bitrate=N/A speed=4.58x Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
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.