[Mplayer-users] How to pipe the ac3 data through an external program like ac3play ?
atmosfear at users.sourceforge.net
Sun Jul 22 17:05:17 CEST 2001
Sunday, July 22, 2001, 3:45:59 PM, you wrote:
> I've created a avi-file with divx video and ac3 tone.
> If I use the -dumpaudio option, I get a file stream.dump, which I can
> play with ac3play and get dolby digital sound.
> If I try to pipe the ac3 data to a file during playing the avi file, I
> don't get any ac3 data (ac3play says "CRC failed").
> I want to pipe this data in a pipedevice, so ac3play can play it during
> watching the video.
> the command I tried it:
> mplayer -vo x11 -ao pcm -nowaveheader mydivx.avi
> my codecs.conf
> audiocodec pcm
> info "Uncompressed PCM"
> status working
> ; format 0x1
> ;;;; these are for hardware support only:
> ; format 0x6
> ; format 0x7
> ; format 0x11
> ; format 0x50
> format 0x2000
> driver dvdpcm
> dll "uncompressed"
sorry but pcm codec in codecs.conf and -ao pcm are two totally
different things, one defines what library to use for playing back pcm
data in a video the other one selects the audio out plugin which dumps
data to a raw pcm/wave file.
And if you use -ao pcm ac3 sound gets first decodec by libac3 which
also does downmix to stereo, so the pcm file you get is stereo only
and of no use for ac3play. -dumpaudio directly dumps the compressed ac3
> Does anybody have successfully get the ac3data ?
the right thing to achieve this imho is to build ac3play code as an
alternative (to libac3) ac3 codec for mplayer.
> BTW.: I'm using mplayer 0.18pre5 and ac3play-0.4.0
Felix mailto:atmosfear at users.sourceforge.net
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