[FFserver-user] ffserver bitrate, formats and other issues questions.
warm at stack.ru
Fri May 20 05:21:48 CEST 2011
I installed next version of ffserver (ffmpeg package):
FFserver version 0.6.3, Copyright (c) 2000-2010 the FFmpeg developers
built on May 16 2011 08:49:21 with gcc 4.6.0 20110429 (prerelease)
configuration: --prefix=/usr --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx
--enable-libtheora --enable-postproc --enable-shared --enable-x11grab --enable-libopencore_amrnb
--enable-libopencore_amrwb --enable-libschroedinger --enable-libopenjpeg --enable-gpl --enable-version3
libavutil 50.15. 1 / 50.15. 1
libavcodec 52.72. 2 / 52.72. 2
libavformat 52.64. 2 / 52.64. 2
libavdevice 52. 2. 0 / 52. 2. 0
libswscale 0.11. 0 / 0.11. 0
libpostproc 51. 2. 0 / 51. 2. 0
I am trying to transcode a few DVB channels via ffserver and still have no success. The problems are:
1. It seems that my installation can not produce more them 1Mbit/s video stream per channel and actually it even cannot
produce more then one channel at a time.
FileMaxSize 36M # this affects on streaming but how ?
ACL allow 127.0.0.1
# VideoHighQuality # works (?)
VideoBufferSize 20000000 # bits ? Bytes ? What ?
When VideoBitRate is set to 2000 the stream is useless - image not stable and breakes. Mplayer very often says "Cache
not filling, consider increasing -cache and/or -cache-min!". But VideoBitRate 1000 sreams petty good stable image.
ffserver uses 12.5 % of CPU (in top) regardless of bitrate, number of clients or number of streaming channels. Feeding
ffmpeg on this machine uses 3-6 %, CPU is "Intel(R) Xeon(R) CPU X3470 @ 2.93GHz". I believe that CPU is powerful
What is actual limits on bitrate in ff server ?
2. When I start 3 same stream channels (3 same config sections like above but different channels and feeds) A/V sync is
Is it possible to sync audio and video ? How ?
3. Actually I would like to stream via libx264 codec and still can not find working example.
Can any one to show working example with libx264 ?
Also I tried to use theora via ffmpeg2theora but this program exits very soon when gets some error :-(.
4. Where can I find table of compatibility formats and codecs ? Not all formats work for streaming and not all
streaming formats can carry any codecs. It is like roulette ...
Can any one help me ?
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