[linux-dvb] Re: Audio loss with latest CVS driver

[Ralph Metzler <rjkm@convergence.de>]

Klaus Schmidinger writes:
 > Ralph Metzler wrote:
 > > 
 > > Klaus Schmidinger writes:
 > >  > If I do the following ioctl() calls while replaying a "multiplexed PES"
 > >  > recording (done with VDR 0.80pre5) through the /dev/ost/video device
 > >  > the audio gets mute:
 > >  >
 > >  >   ioctl(videoDev, VIDEO_FREEZE);
 > >  >   ioctl(videoDev, VIDEO_SLOWMOTION, 2);
 > >  >   ioctl(videoDev, VIDEO_PLAY);
 > >  >
 > >  > and not even a subsequent
 > >  >
 > >  >   ioctl(audioDev, AUDIO_SET_MUTE, false);
 > >  >
 > >  > can change that. In the typical VDR application these ioctl() calls don't
 > >  > occur immediately after each other. This is just the smallest example that
 > >  > demonstrates this behaviour.
 > >  >
 > >  > Could this be a driver problem, or am I doing something wrong here?
 > > 
 > > As explained in the API docs a VIDEO_CONTINUE is used after a
 > > VIDEO_FREEZE to continue playback.
 > > If you do this everything works fine but I'll see what I have to
 > > change to make the sequence you describe work.
 > 
 > I have changed the VIDEO_PLAY to VIDEO_CONTINUE and tried this again with the
 > latest CVS driver version (2001-05-25), but this sequence still doesn't work:
 > 
 >   ioctl(videoDev, VIDEO_FREEZE);
 >   ioctl(videoDev, VIDEO_SLOWMOTION, 2);
 >   ioctl(videoDev, VIDEO_CONTINUE);
 > 
 > Note that
 > 
 >   ioctl(videoDev, VIDEO_FREEZE);
 >   ioctl(videoDev, VIDEO_CONTINUE);
 > 
 > works as expected, but with an intermediate VIDEO_SLOWMOTION the audio is
 > lost and doesn't come back.


You are still not terminating the VIDEO_FREEZE with a VIDEO_CONTINUE 
or a VIDEO_PLAY but put the VIDEO_SLOWMOTION in between.

I'll have to make some changes in the firmware to make it work as you
want, but instead of just fixing this one case I want to move 
all the trickmode commands into the firmware at once to have better
control. It's next on my list.


Ralph








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