Re: [LAD] Mplayer decode to stdout

On 01/28/2012 11:35 PM, Alfs Kurmis wrote:
> Hi Experts.
>
> For my small multimedia audio project i wanna use mplayer as external decoder.
> As usually via pipe , for example so
> mplayer -af resample=44100:0:1,channels=2,format=s16le -ao
> pcm:nowaveheader:file=/dev/stdout -quiet -really-quiet 'saund_file.ext' |
> nextprog -options ...
> or so
> http://martini.pudele.com/radio/programming/audio/mplayerdecso01.c
>
> I prefer output to pipe, not FIFO.
>
> It seems that mplayer also all messages put to stdout :(

That's probably why mplayer devs recommend using mkfifo (named pipe)
instead of stdout.. 'mencoder' can do it.

If you need to support a variety of unknown formats and codecs: ffmpeg
is an alternative and gstreamer might be one.

ffmpeg -i /some/file -f u16le -acodec pcm_s16le -ar 44100 - \
| jack-stdin system:playback_1 system:playback_2

on that note, `jack-stdout` can capture and pipe raw PCM data from any
JACK-application including `mplayer -ao jack /some/file`. YMMV.

HTH,
robin
_______________________________________________
Linux-audio-dev mailing list
Linux-audio-dev@email-addr-hidden
http://lists.linuxaudio.org/listinfo/linux-audio-dev
Received on Sun Jan 29 04:15:02 2012