[FFmpeg-user] what is "fltp" for audio when using ffmpeg

Soho Soho123 soho123.2012 at gmail.com
Wed Jul 31 10:18:53 CEST 2013

2013/7/31 Kirill Gavrilov <gavr.mail at gmail.com>

> Hello,
> What is "fltp"? Does anyone have idea?
> >
> fltp is Planar Floating point format. Planar format were added relatively
> recently to FFmpeg.
> The main target is to eliminate extra processing in audio decoders and move
> out it to dedicated re-sampling library.
> Sorry I can not help with the problem itself - I suppose you should either
> try to update your VLC or try adding extra flags to ffserver to perform
> re-sampling to compatible format explicitly.
> -----------------------------------------------
> Kirill Gavrilov,
> Software designer.
> <kirill at sview.ru>
> _______________________________________________
> Hi , the setting used by ffserver is :
ffserver output asf stream, and I add global_header already,
But VLC can not play the audio part of asf stream that audio + video output
by ffserver.
Do you have idea about the extra flags?

<Stream test.asf>
Feed feed1.ffm
Format asf

AVOptionVideo flags +global_header
VideoSize 640x480
VideoFrameRate 30
VideoCodec libx264

AVOptionAudio flags +global_header
AudioCodec wmav1
AudioChannels 2
AudioSampleRate 48000

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