[FFmpeg-user] Bitrate Problem About Tee Pseudo-muxer

Yang Zhang yzfedora at gmail.com
Fri Jun 2 17:22:15 EEST 2017


I am trying use tee muxer to output sample stream to multiple destinations.
everything seems works fine. but the bitrate is always show N/A, and
ffprobe show bitrate=N/A also.

here is the simplest tee muxer command I am using:
*ffmpeg -i test.mp4 -vcodec h264_qsv -c:v h264 -f tee  -map 0:v
[f=flv]rtmp:// <>*
and here is the output:
*frame=  714 fps=164 q=-1.0 Lsize=N/A time=00:00:29.69 bitrate=N/A dup=2
drop=0 speed=6.82x *

as you can see. the bitrate is shown N/A.

but if I do not use tee muxer, just output to rtmp url. the bitrate will be
show on the output.
*ffmpeg -i test.mp4 -vcodec h264_qsv -c:v h264 -f flv  -map 0:v
rtmp:// <>*

*frame=  395 fps=169 q=-1.0 Lsize=     580kB time=00:00:16.43 bitrate=
288.9kbits/s speed=7.03x*

does anyone know why it does not show bitrate when use tee muxer? how can I
fix this problem?

thanks in advance!

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