[FFmpeg-user] Low FPS with MPEG-TS (H264) Encoding

DasDing derschu50 at googlemail.com
Sat Dec 31 16:59:45 CET 2011

Hi all,

I want to encode and stream a video from a HTTP source to a RTMP server
(adobe flash media server). The source-file has a MPEG-TS container with a
H.264 encoder. The audio is an ac3 5.1 codec.
I get the video from a tv programm that streams the tv channel to a HTTP
address. It only happens with HD channel who have an ac3 5.1 codec. HD
channel with ac3 2.0 codec works quiet well. And channel with SD quality
works good for a long time.

Here the ffmpeg-console: http://www0.xup.in/exec/ximg.php?fid=62464421

You can see that the FPS is only at 15, but it must be 25, and there are a
lot of red lines.

Here my ffmpeg line:
/ffmpeg\ffmpeg -isync -i "" -vcodec libx264 -r 25 -b
850k -minrate 800k -maxrate 900k -bufsize 2000k -s 720x400 -bt 5k -acodec
libmp3lame -ab 96k -ar 44100 -channels 2 -async 50 -ac 2 -threads 0 -fpre
ffmpeg/.ffmpeg//libx264-main.ffpreset -f flv

ffmpeg must encode to flv (flash), other formats do not support adobe flash
media server.

If you need more informations, please ask me :).

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