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1. Old logic meaned: everywhere, except Windows, ffmpeg has to use HW acceleration, but on Windows ffmpeg has to use (unavailable) software HEVC by default 2. Software HEVC is available only if you provide corresponding software MediaSDK library, which isn't provided with ffmpeg. More information could be found in https://github.com/Intel-Media-SDK/MediaSDK/blob/master/doc/samples/readme-encode_linux.pdf 3. HW HEVC decoding/encoding are available on Windows in the driver by default Note: Default case should be the most common case but this change still has potential risk on windows if HW path is not supported(or doesn't work as expection). (See the historical disscution: https://lists.libav.org/pipermail/libav-devel/2016-November/080419.html). In such case, two options suggested: 1. Use the option "-load_plugin hevc_sw" to switch SW path manually. 2. Or report bug to Intel windows driver if your GPU can support HEVC HW codec. (HEVC decoding is supported since Braswell, and encoding supported since Skylake) Patch started by Landgraph. Add similar change for hevc decoder and bump a new version. Reviewed-by: Mark Thompson <sw@jkqxz.net> Reviewed-by: Maxym Dmytrychenko <maxim.d33@gmail.com> Signed-off-by: Landgraph <me@landgraph.ru> Signed-off-by: Zhong Li <zhong.li@intel.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 a mean to alter decoded Audio and Video through chain of 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.