First time poster, so please be kind if I ask anything stupid! I have a live BeeCam feed on YouTube:
https://www.youtube.com/channel/UCE0jx2Z6qbc5Co8x8Kyisag/live <https://www.youtube.com/channel/UCE0jx2Z6qbc5Co8x8Kyisag/live> using YouTube’s “Stream Now” feature, which is distinct from a streaming “event” because I don’t have to schedule it. Whenever I’m pushing video to YouTube, the channel goes live. The stream is supplied by a Raspberry Pi running as an ffmpeg “relay server,” e.g. it’s not doing any transcoding; it’s just repacking an RTSP stream from an off-the-shelf camera: ./ffmpeg -re -thread_queue_size 512 -rtsp_transport tcp -i "rtsp://anonymous:password@192.168.1.11:554" -f concat -safe 0 -i playlist.txt -vcodec copy -acodec copy -t 01:47:02 -f flv "rtmp://a.rtmp.youtube.com/live2/my-youtube-streaming-key” The -t and playlist.txt are because my camera lacks and audio feed, and YT requires an audio stream, so I have a collection of royalty-free mp3s in the playlist, and I’m wrapping this command in a loop. When I run this on my RPi 2, CPU utilization for ffmpeg is <<<<10%, which is what I want, because I will have up to 3 instances of ffmpeg pushing 3 camera streams to 3 YT channels during honey bee swarm season in Spring. What I want to do is add some captions to the video as soft subtitles, e.g. my location, the present temperature, and the weather forecast. I don’t have enough CPU on the Pi to burn these into the video stream. Is this possible in ffmpeg and with YouTube’s “stream now” feature? I can get ffmpeg to put a soft subtitle into a local .mkv file: ./ffmpeg -i video.mp4" -i SubtitleTest.srt -acodec copy -scodec copy out.mkv but I changing the output to .m4v, mp4, or .flv results in errors such as: Subtitle codec 'ass' for stream 2 is not compatible with FLV and pushing mkv to YouTube via: ./ffmpeg -i video.mp4" -acodec copy -f mkv "rtmp://a.rtmp.youtube.com/live2/my-youtube-streaming-key” returns: Requested output format 'mkv' is not a suitable output format rtmp://a.rtmp.youtube.com/live2/my-youtube-streaming-key <rtmp://a.rtmp.youtube.com/live2/my-youtube-streaming-key> Am I doing this fundamentally wrong? Or is this just not possible? If it’s possible I will continue reading documentation until I get it working!!! Thanks! _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
