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Intra refresh is a technique that gradually refreshes the video by encoding rows or regions as intra macroblocks/CTUs spread over multiple frames, rather than using periodic I-frames. This provides better error resilience for video streaming while maintaining more consistent bitrate. Disable Intra Refresh (This is the default) ffmpeg -init_hw_device d3d12va -hwaccel d3d12va -hwaccel_output_format d3d12 \ -i input.mp4 \ -c:v h264_d3d12va \ -intra_refresh_mode none \ -intra_refresh_duration 30 \ -g 60 \ output.h264 Enable Intra Refresh ffmpeg -init_hw_device d3d12va -hwaccel d3d12va -hwaccel_output_format d3d12 \ -i input.mp4 \ -c:v h264_d3d12va \ -intra_refresh_mode row_based \ -intra_refresh_duration 30 \ -g 60 \ output.h264 Parameters - `-intra_refresh_mode`: Set to `row_based` to enable row-based intra refresh, or `NONE` to disable - `-intra_refresh_duration`: Number of frames over which to spread the intra refresh (default: 0 = use GOP size) - `-g`: GOP size (should typically be larger than intra refresh duration)
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.