Hello, I have live stream that is running over multiple UDP ip:ports. On each port, there is different content. For example, there is channel BBC and runs on:
- 239.200.200.16:1234 only video in resolution 640:360 (A) - 239.200.200.16:1235 same video in resolution 720:410 (B) - 239.200.200.16:1255 audio (C) now we need to capture "event" that lasts for example 10 seconds and product mp4 files with video A, B and audio C. I have tried command ffmpeg -i 'udp://@ 239.200.200.16:1234?interface=172.16.128.42&fifo_size=100000000&timeout=100000000' -i 'udp://@ 239.200.200.16:1235?interface=172.16.128.42&fifo_size=100000000&timeout=100000000' -i 'udp://@ 239.200.200.16:1236?interface=172.16.128.42&fifo_size=100000000&timeout=100000000' -i 'udp://@ 239.200.200.16:1237?interface=172.16.128.42&fifo_size=100000000&timeout=100000000' -i 'udp:// 239.200.200.16:1255?interface=172.16.128.42&fifo_size=100000000&timeout=100000000' -map 0:0 -copyinkf -movflags faststart -t 10 -vcodec copy -f mp4 video_640_360.mp4 -map 1:0 -copyinkf -movflags faststart -t 10 -vcodec copy -f mp4 video_720_410.mp4 -map 4:0 -copyinkf -movflags faststart -t 10 -acodec copy -f mp4 audio_cs.mp4 this creates mp4 files however they are not aligned. When I package this using packager, the content of the two video profiles are not synchronized and audio is not matching any of the videos (when profile is changed, the video jumps few seconds). I think it might be because the ffmpeg first analyses first input, starts recording, analyses second input, starts recording, ... and analysing takes some time, therefore its not synchronized. I also tried multiple ffmpegs, one for each input (something like bash ffmpeg xxx & ffmpeg yyy & ffmpeg zzz). I have achieved much better results than with the first solution but the audio still didnt match video by a little time (usually 0.5 to 2 secs). What would you please suggest to do to achieve having multiple video profiles and audio synchronized from multiple UDP inputs? Thank you for assistance Jakub Vojacek _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
