gx
097ca81605
Phase 1 deliverable (см. gx/vf-cuda-grid#1): - libavfilter/vf_cuda_grid.c (~270 LOC): multi-input filter, fixed 2×2 quad - 4 NV12 CUDA frames same size → 2W × 2H output frame - Composition: cuMemcpy2DAsync per Y + UV plane на каждый input - framesync для lock-step pull всех 4 inputs - Output hw_frames_ctx allocated from input device_ref - Build wiring: CONFIG_CUDA_GRID_FILTER → libavfilter/{Makefile,allfilters.c}, configure deps на ffnvcodec Limitations Phase 1: - All inputs must be same size (no scaling) - Quad layout hardcoded (no DSL, no runtime switching) - NV12 only (no RGBA/YUV420P) Phase 2: dynamic layouts + scaling. Phase 3: runtime control via process_command.
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.