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Volume Adjustment in 'video' playback.
http://forum.linhes.org/viewtopic.php?f=6&t=2988
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Author:  rusty0101 [ Wed Dec 01, 2004 12:55 am ]
Post subject:  Volume Adjustment in 'video' playback.

This is not a question about adjusting the volume in live tv, or recorded tv playback. My question is how does one adjust the volume for playback of files in the 'videos' section. Transcoded DVD's, or TV shows transcoded for long term storage.

As things appear to stand, the standard volume controll keys, [F7]-[F9] and '[', ']', '\' appear to have no effect in my playback. As a result I am having problems getting consistent playback volume from different recorded material. I have found ripped DVD's to have a volume so low that I can't have any noisy fans in the same room, even with my TV volume set to max. Some other Rips or transcoded files have a perfectly fine volume level. (which is a problem if you set things up so that immediately after playback of one video you go into playback of another, as then you end up with some videos blaring loudly unitll you get the volume of the TV set back down to a normal level.)

I concede that this may not be a problem for everyone, but it has become a problem for me. I just rather hope that this isn't going to require re-compiling something to use a different keymap than originally designed.

A somewhat unrelated issue is cover images for videos. Placing them in the /home/mythtv/.mythtv/MythVideo folder is an issue for people with multiple systems being used for front ends. A bett place might be /myth/video/.mythtv/MythVideo or /myth/video/CoverShots.

-Rusty

Author:  cecil [ Wed Dec 01, 2004 3:49 am ]
Post subject: 

Files under "videos" are played back via MPlayer (unless you changed it to XIne). You can use 9 (increase) and 0 (decrease) to adjust the volume.

Author:  rusty0101 [ Wed Dec 01, 2004 11:22 am ]
Post subject: 

That does not appear to be working for me either. (I have not been using xine, though I am begining to think I will have to.)

-Rusty

Author:  rusty0101 [ Wed Dec 01, 2004 11:37 am ]
Post subject: 

Ok, a minor correction. Using 9 and 0 to adjust the volume appears to have no effect, because the volume is already at maximum when I am attempting to increase the volume. The fact that it is entirely inaudible at that level with the TV set to a normal listening volume suggests that there is a problem with the volume level on the DVD or source media.

Is this the result of using AC3 audio and playing back through the stereo output? I don't really mind re-ripping my dvds without AC3, i fthis will solve the problem, but it will be an anoyance.

-Rusty

Author:  bgood4000 [ Sat Dec 04, 2004 10:55 pm ]
Post subject: 

You can type
Code:
alsamixer
in a terminal and make sure all your volumes are set high enough, master and PCM particularly.

Author:  copygod [ Sat Feb 11, 2006 2:37 pm ]
Post subject: 

not to intentionally dredge up a year-old thread, but since there seems to be no resolution to this problem, i thought i'd add my solution, since i had been suffering from the same type of malady... first, my description of the problem...

volume adjustment works fine within mythtv if you're watching live tv or a recording, but when using mplayer to playback video, the volume keys would bring up the mplayer OSD for volume, but the volume bars would never move (up or down) from the max volume display, nor would the volume adjust at all. obviously there is no problem with alsa or sound in general as myth would have problems with live tv or recordings, not just mplayer, so it seemed to be an mplayer setting, but i didn't have this problem on my MBE in the living room.

the solution turned out to be going to settings -> video settings -> player settings (something like that) to adjust the mplayer command used to play video files.
by adding
Code:
-ao alsa
i got everything working, but it seems that this portion must be added in a specific location in the command string because volume adjustment did not seem to work if the string were added after
Code:
-vo xv


all in all, this is what my mplayer command now looks like on the SBE that was having volume control problems with mplayer...
Code:
mplayer -fs -zoom -ao alsa -quiet -idx -vo xv $s

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