[mpeg2] Status of the MPEX drivers?

Andrew de Quincey adq_dvb at lidskialf.net
Tue Feb 15 16:27:24 CET 2005


On Tuesday 15 Feb 2005 15:56, Luca Abeni wrote:
> Hi all;
>
> I used an MPEX board without problems about one year ago, and everything
> worked farirly well. (I have the version without tv tuner)
>
> Today I needed it again, and tried to capture an MPEG2 TS using my old
> 2.4.23 kernel (it used to work ok) with the latest video4linux snapshot.
>
> I notice that something changed in the /dev/video1 device, because the
> program that I used to set the audio and video PIDs and bitrates
> fails... Is the ioctl() interface changed?

yeah - it is now using an experimental v4l extension ioctl... have a look at 
VIDIOC_G_MPEGCOMP in videodev.h. 

> Also, I tried to capture some audio and video using the default
> parameters, but the audio is captured at a very low volume...
> Is this a known problem? I never encountered it before...

maybe the mixer settings? If you enable OSS support, you get a proper OSS 
audio device that lets you switch inputs. Not experienced this myself, but if 
its _very_ low, you might be hearing bleedover from the correct, but 
unselected, audio path.



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