ffmpeg live transcoding faster alternative?

Question

Is there any opensource alternative to ffmpeg and VLC to live video transcoding from HTTP streaming to RTMP or other?

ffmpeg caused my CPU (AMD 4.0GHZ 8Core) is loaded 100% with only 8 SD streams.

Thanks for help.

PS. I think I don't need to transcode my video, I can also stream with something like http video proxy. Source is in HTTP streaming format, also I am under Linux.

Answer 1

Your question should be: "Is there any opensource alternative faster than ffmpeg".

And the answer is No.

If you dont need to transcode, add -acodec copy -vcodec copy to your command line

Answer 2

ffmpeg is flexible encoder you can tweak it much you like , it's up to encoding algorithm and Size VS Quality battle , I think now days X264 are more efficacy than it was before , the important tweaks with ffmpeg to speedup encoding is -preset the default is medium you can use fast or faster and watch the quality of your output video . I have live steaming video and I use this command

 ffmpeg -loglevel 0 -thread_queue_size 32768 -re -i "http://sorce" -vcodec libx264 -preset fast -break_non_keyframes 1 -profile:v high444 -x264-params "nal-hrd=cbr" -b:v 260k -acodec aac -b:a 32k -map_metadata -1 -s 480x360 -f flv rtmp://localhost/hls/live

That for very low quality video ,

ffmpeg -loglevel 0 -thread_queue_size 32768 -re -i "http://source" -vcodec libx264 -preset fast -break_non_keyframes 1 -b:v 665k -profile:v high444 -x264-params "nal-hrd=cbr" -acodec aac -b:a 32k -map_metadata -1 -s 854x480 -f flv rtmp://localhost/hls/live

you will get better quality and viewable picture when increase -b:v value . so it's up to you preferred network you can get much higher video quality with less CPU usage.