gx
4010461300
CPU rasterization через freetype (DejaVu/Liberation auto-detect или font_file= option), upload pitched RGBA buffer to GPU, blit через Alpha_Blit_RGBA_Y/UV kernels (Phase 4b-2 уже had). Cache: per-overlay-id atlas с keys (text, font_size, r/g/b) — re-rasterize только при change. Cleanup при remove_overlay/clear_overlays/uninit. Options: font_file= — TTF path (default: search DejaVu/Liberation) font_size= — default size if overlay не указал свой Wire format: add_overlay <id> text x=.. y=.. text=hello font_size=24 r=255 g=255 b=255 opacity=200 Conditional на CONFIG_LIBFREETYPE — без него text overlays no-op (остальные типы работают как обычно). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.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.