gx
b537de7e52
Companion к существующему cuframes://. URL `cuframes_packets://<key>`
открывает encoded packet ring у publisher'а (поднятого с --enable-packet-ring)
и выдаёт raw H.264/H.265 stream без декодирования.
Use case в Frigate config:
cameras:
cam_parking:
ffmpeg:
inputs:
- path: cuframes://cam-parking # decoded NV12 для detect
roles: [detect]
- path: cuframes_packets://cam-parking # encoded H.264 для record
input_args: -f cuframes_packets
roles: [record]
→ 1 RTSP connection к камере (вместо 2-3).
Implementation:
- read_header: cuframes_subscriber_create + enable_packets + get_codec_params
(codec_id + extradata → AVStream.codecpar).
- read_packet: cuframes_subscriber_next_packet → memcpy в AVPacket.
PACKET_OVERRUN → EAGAIN (library resync'нет на next call).
- AV_PKT_FLAG_KEY/CORRUPT/DISCONTINUITY mapping из cuframes flags.
- pts/dts: ns from publisher → µs timebase.
Build wiring:
- configure: cuframes_packets_demuxer_deps="libcuframes"
- libavformat/Makefile: CONFIG_CUFRAMES_PACKETS_DEMUXER → cuframes_packetsdec.o
- libavformat/allformats.c: extern ff_cuframes_packets_demuxer
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.