[MPlayer-dev-eng] inverse of tfields filter << audio input problem!!

[LGW]

Hi there,

>I also had a problem with audio not working on a tv card (sound going
>via a soundcard), which i fixed by changing the way the tv demux control
>method detects if it has sound, but i would presume this would have been
>fixed since 0.90 was released (?), and i doubt my patch is correct
>anyway.
>
I also have a problem with audio init with the tv-mode. I have two 
tv-in-cards; one has it's own audio chip with digital dsp (oss type, 
Hauppauge WinTV PCI...), the other one has no audio chip. I try to use 
an alsa soundcard to record the sound of both, but it seems like the 
audio stream is initialized (i hacked some printfs into the source) but 
never told to mencoder that an audio stream exists on the card without 
audio interface (Elsa Erazor III with rivatv module). it works with the 
hauppauge (both internal and alsa interface).

Maybe there is an logical error disabling sound even with force_audio 
when the tv card has no audio? The force_audio parameter seems to be 
totally ignored, anyway...

command line:
mencoder -oac mp3lame -tv 
on:input=0:device=/dev/video1:driver=v4l:width=352:height=288:outfmt=rgb16:alsa:forceaudio 
-flip -ovc lavc -o test.avi

the same command line when I change /dev/video1 to /dev/video0; I think 
the existing Hauppage audio port makes him think that he has audio in 
the first place. mencoder uses the alsa interface, though.

Is that in any case connected to the problem you had? Please submit your 
solution, than! I need to copy this VHS... :)

I'll have a deeper look into the code, but I don't know much about 
mplayer-demux-internals... :/

for now I found out that the alsa init (tvi_v4l.c, line 509) is 
executed, but no other sound stuff (what should be alright because there 
is no onboard card).

Or maybe there is simply some mplayer-internal control variable not set 
telling him there is an audio-stream? I wonder...

it seems like the audio init in tv.c, about line 430, is ran for the 
Hauppauge with own audio chipset, but not for the Erazor. Remember, both 
use alsa (and it works for one)...

cu,
  Lars

>Thanks,
> Michael Zucchi
>
>
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