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FFmpeg

我们有 whipintowhepfrom 来把 rtp <-> whip/whep 进行转换

例如:

ffmpeg -> whipinto -> live777 -> whepfrom -> ffplay

Video: VP8

视频测试源

bash
# send RTP and Create SDP file
ffmpeg -re -f lavfi -i testsrc=size=640x480:rate=30 \
-vcodec libvpx -f rtp 'rtp://127.0.0.1:5002' -sdp_file input.sdp

对于 ffplay,你需要一个 sdp 文件

bash
ffplay -protocol_whitelist rtp,file,udp -i input.sdp

你可以使用 whipinto 工具接收 RTP 并转换为 WebRTC

bash
# Use SDP file as input
whipinto -i input.sdp -w http://localhost:7777/whip/777
bash
whepfrom -o output.sdp -w http://localhost:7777/whep/777

对于 ffplay,你需要一个 sdp 文件

bash
ffplay -protocol_whitelist rtp,file,udp -i output.sdp

Video: VP9

WARNING

VP9 打包功能尚处于实验阶段,其规范尚处于草案状态。请设置 -strict experiment 选项以启用此功能。

bash
ffmpeg -re -f lavfi -i testsrc=size=640x480:rate=30 \
-strict experimental -vcodec libvpx-vp9 -pix_fmt yuv420p \
-f rtp 'rtp://127.0.0.1:5002' -sdp_file input.sdp

WARNING

VP9 支持多种颜色空间,必须添加 -pix_fmt yuv420p 参数。

bash
whipinto -i input.sdp -w http://localhost:7777/whip/777

Video: H264

bash
ffmpeg -re -f lavfi -i testsrc=size=640x480:rate=30 -vcodec libx264 \
-profile:v baseline -level 3.0 -pix_fmt yuv420p \
-g 30 -keyint_min 30 -b:v 1000k \
-minrate 1000k -maxrate 1000k -bufsize 1000k \
-preset ultrafast -tune zerolatency \
-f rtp 'rtp://127.0.0.1:5002' -sdp_file input.sdp
bash
whipinto -i input.sdp -w http://localhost:7777/whip/777

Video: AV1

DANGER

RTP 不支持的编解码器 av1

Audio: Opus

bash
ffmpeg -re -f lavfi -i sine=frequency=1000 \
-acodec libopus -f rtp 'rtp://127.0.0.1:5004'

Audio: G722

bash
ffmpeg -re -f lavfi -i sine=frequency=1000 \
-acodec g722 -f rtp 'rtp://127.0.0.1:5004?pkt_size=1200'

Both: Audio and Video

VP8 和 OPUS

bash
ffmpeg -re \
-f lavfi -i sine=frequency=1000 \
-f lavfi -i testsrc=size=640x480:rate=30 \
-acodec libopus -vn -f rtp rtp://127.0.0.1:5002 \
-vcodec libvpx -an -f rtp rtp://127.0.0.1:5004 -sdp_file input.sdp

H264 和 G722

bash
ffmpeg -re \
-f lavfi -i sine=frequency=1000 \
-f lavfi -i testsrc=size=640x480:rate=30 \
-acodec g722 -vn -f rtp rtp://127.0.0.1:5002 \
-vcodec libx264 -profile:v baseline -level 3.0 -pix_fmt yuv420p \
-g 30 -keyint_min 30 -b:v 1000k -minrate 1000k -maxrate 1000k -bufsize 1000k \
-preset ultrafast -tune zerolatency -an -f rtp rtp://127.0.0.1:5004 \
-sdp_file input.sdp

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