I have 30 video sources. i want to make ffmpeg command to create 1 channel (streaming) with all channels embedded in (in bad quality)
"[0:v][1:v]setpts=PTS-STARTPTS,overlay=20:40[1]; \
[1][1:v]setpts=PTS-STARTPTS,overlay=(W-w)/2:(H-h)/2[v]; \
[1:a][2:a]amerge=inputs=2[a]" \
-map "[v]" -map "[a]" -ac 2 3.mp4
i trying to find the correct command do downgrade quality, than create one streaming output. (one audio chosen)
Scale each video to desired size with the scale filter. Arrange with the xstack filter.
ffmpeg -i input0 -i input1 ... -i input29 -i audio -filter_complex
"[0]scale=128:-1[v0];[1]scale=128:-1[v1];...[29]scale=128:-1[v29];
[v0][v1]...[v29]xstack=inputs=30:layout=<your desired layout>[v]"
-map "[v]" -map 30:a -c:v libx264 -crf 51 -c:a aac -shortest output.mp4
-crf 51 will provide the low quality as requested. Decrease the value if you want better quality.