[MPlayer-users] No sound in TV output

[Roger Miliker]

On Tuesday 25 February 2003 04:53, dion king wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> I use the bellow command to watch TV:
>
> mplayer -tv on:device=/dev/video0:driver=v4l
>
> :width=640:height=480:input=0:forcechan=2
>
> but there is no sound output.
> ____________________________________________________________________
> Playing TV
> TV detected! ;-)
> Selected driver: v4l
>  name: Video 4 Linux input
>  author: Alex Beregszaszi <alex at naxine.org>
>  comment: under development
> Selected device: BT878(Leadtek WinFast 2000)
>  Capabilites: capture tuner overlay clipping frameram scales
>  Device type: 235
>  Supported sizes: 48x32 => 924x576
>  Inputs: 3
>   0: Television: tuner audio tv camera  (tuner:1, norm:pal)
>   1: Composite1: audio camera  (tuner:0, norm:pal)
>   2: S-Video: audio camera  (tuner:0, norm:pal)
> Card reports an unknown audio mode !
> Trying two channel audio. Use forcechan to override.
> Using input 'Television'
> vo: X11 running at 1024x768 with depth 24 and 32 bpp (":0.0" => local
> display) Disabling DPMS
> ==========================================================================
> Opening video decoder: [raw] RAW Uncompressed Video
> VDec: vo config request - 640 x 480 (preferred csp: Planar YV12)
> VDec: using Planar YV12 as output csp (no 0)
> Movie-Aspect is undefined - no prescaling applied.
> VO: [xv] 640x480 => 640x480 Planar YV12
> Selected video codec: [rawyv12] vfm:raw (RAW YV12)
> ==========================================================================
> Audio: no sound
> Starting playback...
> Successfully enabled DPMS.0% 0 0 0%
> ________________________________________________________________________
>
> I have tried forcechan=1 and forcechan=2, but it doesn't work.
> However my tv card (Leadtek WinFast 2000) run well under xawtv:
>
> xawtv -debug 1
> ________________________________________________________________________
> v4l: open: /dev/video0 (BT878(Leadtek WinFast 2000))
> capabilities:  capture tuner overlay clipping frameram scales
>   size    : 48x32 => 924x576
>   channels: 3
>   Television: 1 tuner audio  tv
>   composite1: 0 audio  camera
>      S-Video: 0 audio  camera
> audios  : 1
>  3 (TV): muted=no
> tuner   : Television 0-4294967295 PAL NTSC SECAM
> v4l: bttv version 0.7.91
> fbuffer : base=0x0xd4000000 size=1024x768 depth=32 bpl=4096
> picture : brightness=30801 hue=30801 colour=30146 contrast=26214
> picture : whiteness=0 depth=12 palette=yuv420p
> mbuf: size=4259840 frames=2
> v4l: using mapped buffers for capture
> vid-open: ok: v4l
> __________________________________________________________________________
>
> xawtv can get video and audio,
> Then what shall I do for mplayer ???
>
> Thanks
>
> dion
>

As far as I know from my card (saa7134 card=9) mplayer fails to unmute the 
card. Two ways of getting it unmuted:

start xawtv and the 'killall -9 xawtv' not very elegant
better use 'v4lctl volume mute off'

and after those just use mplayer to watch the picture to the sound.

Good Luck

Roger