[mythtv-users] OT: avidemux2 question

[Michael T. Dean]

On 04/21/05 16:25, James Pifer wrote:

>Someone else also suggested Normalize. I selected that in avidemux2 and
>re-saved and it came out about the same as far as I can tell. 
>
>If I look at my Myth recording profiles they are all set at 90%. 
>If I look at [Utilities/Setup]Setup/General:
>Mixer Device: /dev/mixer
>Mixer Controls: Master
>Master Mixer Volume is at 74%
>PCM Mixer Volume is at 52%
>
>Would these have any bearing on recording?
>
No.  However, it means that when playing back recordings in MythTV, 
you're using 74% for master and 52% for PCM and when you use the volume 
button (F10 or F11) in Myth, the Master volume is changed.

I set my Master to 90%, use /dev/mixer with mixer controls PCM, so when 
I use the volume button, I change the PCM volume.  I chose this approach 
because xine and MPlayer both default to using mixer controls PCM (so 
I'm changing the same volume regardless of application).

Which brings me to my point--remember that (unless you specified the 
"Internal" player) MythVideo uses an external player (i.e. xine or 
MPlayer).  Each application tends to "remember" the settings for you.  
So, for example, if you watch something using MythTV, your volume snaps 
back to 74%/52%.  You volume up a couple of times changing to 74%/74%.  
Then, you may go into xine or MPlayer and it may snap the PCM volume to 
30% and leaves Master at 74% (to the best of my knowledge, neither xine 
nor MPlayer set both master and PCM on startup).  Since you originally 
tested xine with Master at 90%--at which point the 30% sounded good--it 
seems that post-avidemux volume is different.  This is also probably why 
you have such "seemingly-random" settings for both PCM and Master. ;)

In fact, it's probably your dueling volume controls that's causing the 
confusion.  I recommend either setting Myth to Master 90%, Mixer Device 
/dev/mixer, Mixer Controls PCM or changing all your external 
applications to adjust master volume (which can be very difficult when 
you factor in playing CD's with digital audio extraction--i.e. which 
uses the CD channel--as well as other playback modes).  Changing your 
Myth settings is probably easiest.

HTH.

Mike