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#199 tvtime does not change V4L input volume
closed-fixed
8
2003-09-03
2003-04-30
No
It seems that mplayer will set the volume parameter in
V4L to 0 on mute and exit, and tvtime will not restore
it. This really sucks.
The whole volume parameter is pretty broken anyway. No
capture card I've seen ever sets the VOLUME flag to
indicate that you _can_ change it, even though it _is_
used! Evil! Furthermore, on my card here, it's a mute
toggle not a volume control at all. 65535 == sound,
anything else == mute.
I think the best fix might be to always set it to 65535
on unmute. I worry about clipping, but it might be a
reasonable thing to do anyway.
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Also have seen on some zapping, that input volume for
recordings is automagically set to mic and up one third,
without somebody is asking for that service.
Hermann
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user_id=153320
Hermann, I think you misunderstand the bug. Read it again.
I'm talking about the volume parameter in V4L, has nothing
to do with the mixer on your soundcard or whatever.
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user_id=364087
Yes you are right. Not the best idea to compare here with
unwanted settings on /dev/dsp.
Can't reproduce this bug with mplayer-rc5. The saa7134
driver (20030605) loads with VIDIOCGAUDIO volume=32768 on my
md9717 and it is unchanged on mute and exit of mplayer and
mencoder. (v4l-info)
When I set the volume with v4lctl to 100%, clipping is no
major issue, but I'm wondering about this different
behaviour, even saa7134 seems not to be a reference driver
for mplayer. Tvtime is 0.9.8-2.
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user_id=153320
I dunno what to do about this, but I had another issue that
turned out to be related to the volume on IRC today, so for
the next release I'm going to try setting it to be max and
seeing what bugs come out of it. Thanks all for your input
on this issue.
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user_id=679170
I find that the volume with tvtive is lower than when
using Dscaler in Windows. I'm using a Hauppauge WinTV/
Radio with a BT848. Don't know if it has anything to do
with this bug.