[MEncoder-users] re-encoding avi to normalise sounds (and turn into 5.1)

[Alex Samad]

On Sun, Jan 06, 2008 at 02:55:38PM +1100, Alex Samad wrote:
> I have some avi files that seem to have their sound turn down, every time I 
> play them on the stereo I have to turn the volume right up.
> 
> So I have done some looking around and found mencoder -af volnorm=1
> 
> This seems to do the trick, whilst reading up about that I also found surround, 
> centre and sub, figure I would give that a go as well.
> 
> my source
> orig.avi: RIFF (little-endian) data, AVI, 720 x 540, 25.00 fps, video: DivX 5, 
> audio: Dolby AC3 (stereo, 48000 Hz)
> 
> plays okay with mplayer, I can skip forwards and backwards and everything stays 
> in sync - just that sounds is quiet
> 
> just to make testing easier I cut it down with
> 
>  mencoder orig.avi -o a.avi -ovc copy -oac copy -frames 3000
> 
> a.avi: RIFF (little-endian) data, AVI, 720 x 540, 25.00 fps, video: DivX 5, 
> audio: Dolby AC3 (stereo, 48000 Hz)
> 
> Every thing is okay with this I can skip forward and backward and everything 
> stays in sync
> 
> I do my work
>  mencoder a.avi -o b.avi -ovc copy -oac lavc -lavcopts acodec=ac3 -af 
> volnorm=1,surround=15,center,sub -channels 6
> 
> it finished okay, but when I play it, the sound volume has increased, but when 
> I try to skip ahead or backwards the sounds starts from the beginning
> 
> b.avi: RIFF (little-endian) data, AVI, 720 x 540, 25.00 fps, video: DivX 5, 
> audio: Dolby AC3 (6 channels, 48000 Hz)
> 
> 
> seems like the audio index is out ????  I seem to remember making 5.1 DVD's a 
> while back but using a tool called multimux.
> 
> Is what i am trying possible with mencoder. I have tried just doing the volnorm 
> filter but the same problem !
I have tried this with mp3 output instead

mencoder a.avi -o c.avi -ovc copy -oac mp3lame -lameopts cbr:br=128 -af 
volnorm=1

and I can seek through the file ?

> 
> Thanks
> Alex



> _______________________________________________
> MEncoder-users mailing list
> MEncoder-users at mplayerhq.hu
> http://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: Digital signature
URL: <http://lists.mplayerhq.hu/pipermail/mencoder-users/attachments/20080106/a6179065/attachment.pgp>