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atyenoria / janus-webrtc-gateway-docker

Perfect Docker Image for Media Streaming Expert User ( https://github.com/meetecho/janus-gateway )
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Hi ，Can we mix the two or more rtp_forward streams with ffmpeg? #3

Closed MrsZ closed 6 years ago

atyenoria commented 7 years ago

I don't know this. But, I tried this in the past and failed to do this and gave up.

Some related code snippet is like this

`#{ffmpeg_path} -y \
              -ss #{member[0].ss_at_time} -t #{member[0].t_at_time} -i #{member[0].file_path} -ss #{member[1].ss_at_time} -t #{member[1].t_at_time}  -i #{member[1].file_path} \
              -ss #{member[2].ss_at_time} -t #{member[2].t_at_time} -i #{member[2].file_path}  -f lavfi -i "color=White" \
                -filter_complex \"
                nullsrc=size=640x480 [base];
                [0:v] setpts=PTS-STARTPTS, scale=320x240 [upperleft];
                [1:v] setpts=PTS-STARTPTS, scale=320x240 [upperright];
                [2:v] setpts=PTS-STARTPTS, scale=320x240 [lowerleft];
                [3:v] setpts=PTS-STARTPTS, scale=320x240 [lowerright];
                [base][upperleft] overlay=shortest=1 [tmp1];
                [tmp1][upperright] overlay=shortest=1:x=320 [tmp2];
                [tmp2][lowerleft] overlay=shortest=1:y=240 [tmp3];
                [tmp3][lowerright] overlay=shortest=1:y=240:x=320;
                [0:a][1:a][2:a] amerge=inputs=3
              \" \
                -preset ultrafast -r 30 -b:v 300k -c:v libx264 #{"/tmp/" + @conference["room_name"] + "/" + index.to_s + ".mp4"}`

This is a creating multiples static recording file into one. But, I think that you may pack the real time streaming by changing the input to the rtp_forwarding. This is a experimental level solution. For checking the behaviour of mixing, it may be helpful.