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

Carl Eugen Hoyos cehoyos at ag.or.at
Tue Jan 17 18:30:05 CET 2012

DasDing <derschu50 <at> googlemail.com> writes:

> /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
> "rtmp://
> flashver=FMLE/3.0\20(compatible;\20FMSc/1.0)"/

Is this a network-specific problem or can you reproduce the problem if input and
output are files? How do different threads values affect the problem?

(OT: Can you explain to me what the -isync option does? I don't know and there
is an open ticket about it and I can hardly comment.)

> And my ffmpeg console output, it's long but I didn't find a spoiler:
> /ffmpeg version 0.8.git, Copyright (c) 2000-2011 the FFmpeg developers
>   built on Aug  7 2011 00:42:23 with gcc 4.3.4 20090804 (release) 1

This looks quite old...

Carl Eugen

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