[mythtv-users] No Audio

Achint Sandhu sandhu at kilo.dyndns.org
Wed Jul 9 15:38:24 EDT 2003


Hi,

	Video works fine in myth. The audio is the issue. Sorry if this was not clear 
in my post...

Cheers,
Achint

On July 9, 2003 14:31, Achint Sandhu wrote:
> Hi,
>
> 	I've just started setting up my MythTV box and have run into a small snag.
>
> 	I'm using Gentoo linux and have installed the latest cvs version (from
> last night). The box is a Pundit with a P4 2.4ghz processor, 1gig RAM and a
> PVR 250 card.
>
> 	I managed to get ALSA and the IVTV stuff built without any problems.
>
> 	After setting the input to the RCA video in jack on the back (using
> test_ioctl -p 5), I tested it as follows. I need to use the RCA jack since
> I will be using Myth with a satalite receiver. For my testing I have a VCR
> plugged into this jack. I don't think, that this should make a difference.
>
> 	Using cat /dev/video0 > test.mpg works great. The audio is fine....
>
> 	Using mplayer -vo xv /dev/video0 runs fine too with smooth audio
>
> 	Armed with this, I proceeded to install Myth thinking that I had
> everything setup correctly. The output from test_ioctl -a is included below
> incase someone is intrested. I did notice that the last setting in the
> output is Mute=1. Even with this capture works fine. I've tried changing
> this with no effect.
>
> 	I setup the mythbackend with the capture card information. For the video
> device I used /dev/video0, I didn't know what to set the audio capture
> device to, but I've tried /dev/video0 (since the PVR250 is supposed to
> capture the audio as well.), I tried /dev/dsp (I didn't expect this to
> work, but tried it anyway)....
>
> 	Anyway, watching LiveTV in Myth does not generate any sound. After
> quitting Myth, I can't get sound anymore using mplayer as above.
>
> 	Is myth doing anything special with the IVTV driver that causes this. I am
> sure that I have the correct msp3400 module being loaded.
>
> 	Out of idea. Any help would be appreciated. I'm probably missing something
> obvious. Thanks
>
> Cheers,
> Achint
>
>
> test_ioctl -a
> ^^^^^^^^^^
>
>
> ioctl: IVTV_IOC_G_CODEC
> Codec parameters
> aspect      : 2
> audio       : 0x00e9
> bframes     : 3
> bitrate_mode: 0
> bitrate     : 8000000
> bitrate_peak: 16000000
> dnr_mode    : 0
> dnr_spatial : 0
> dnr_temporal: 0
> dnr_type    : 0
> framerate   : 0
> framespergop: 15
> gop_closure : 0
> pulldown    : 0
> stream_type : 0
> ioctl: VIDIOC_G_FMT
>         Type   : Video Capture
>         Width  : 720
>         Height : 480
> ioctl: VIDIOC_QUERYCAP
>         Driver name   : ivtv
>         Card type     : Vanilla iTVC15 card
>         Bus info      : 0
>         Driver version: 1
>         Capabilities  : 0x01030001
> ioctl: VIDIOC_ENUMINPUT
>         Name    : Composite 0
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : Composite 1
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : Composite 2
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : Composite 3
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : Tuner 0
>         Type    : 0x00000001
>         Audioset: 0x00000000
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : Composite 4
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : S-Video 0
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : S-Video 1
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : S-Video 2
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
>         Name    : S-Video 3
>         Type    : 0x00000002
>         Audioset: 0x00000001
>         Tuner   : 0x00000000
>         Standard: 0x            3000 ( NTSC )
>         Status  : 0
> ioctl: VIDIOC_G_INPUT
> Input = 5
> ioctl: VIDIOC_G_FREQUENCY
> Frequency = 0
> ioctl: VIDIOC_ENUMSTD
>         ID          : 0x            3000
>         Name        : NTSC
>         Frame period: 1001/30000
>         Frame lines : 525
>         ID          : 0x              FF
>         Name        : PAL
>         Frame period: 1/25
>         Frame lines : 625
>         ID          : 0x          7F0000
>         Name        : SECAM
>         Frame period: 1/25
>         Frame lines : 625
> ioctl: VIDIOC_G_STD
> Standard = 0x00003000
> ioctl: VIDIOC_QUERYCTRL
> Brightness = 128
> Contrast = 64
> Saturation = 64
> Hue = 0
> Volume = 65535
> Mute = 1

-- 
"There are 10 types of people in the world.  Those that understand
 binary and those that don't"
 



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