Strip Audio and Increase Volme in an mpg w/o increasing Size in the mpeg?

[Moontrash]

i have an old music mpg and i want to strip the audio from it to increase the volume...the volume is very low....i know virtualDub does this but can i reconnect the audio track to it w/o having to reencode to an avi then back down to an mpg? Or if I reconnect the audio track...will it increase the size of the mpg substantially?

moontrash

[greymalkin]

you determine the size of the audio by what bitrate you choose to encode it at. higher volume isn't going to mean a bigger file size, but higher bitrate is.

you should be able to demux the audio/video, edit the audio and re-encode it to the same bitrate as before, then mux it back together again with no encoding of the video.

[Moontrash]

will i use virtualDub to do this?

moontrash

[Moontrash]

i got an error saying cannot open file..using virtualDub

moontrash

[lantern]

Vdub will not open mpeg files. VDub-Mpeg2 will open the file. You will not be able to remux them back together with VDub-Mpeg2 though, it can only save as avi files.

TMPGEnc, the free version, has an mpeg demux/remux function that will work. File-->Mpeg Tools.

Once you have demuxed the files, you can do whatever you like to the audio and then remux them together.

[Moontrash]

thanx...i'll give it a try..

moontrash

[Moontrash]

well...tmpg tools did the de multiplexing but theres an issue now...the video/audio is 2:36 long...the audio when stripped is 1:42 long....this is strange,...the audio is mp2 also...any ideas?

moontrash

[lantern]

I don't know, I have not had this problem TMPGEnc. I guess you could load the mpg into VDub-MPEG2 and save the wav file. Do whatever changes you wanted and then encode back to mp2 with besweet and multiplex with the original mpg file.

[Moontrash]

thanx lantern...i figured out that the file itself was corrupt somehow..so i re-encoded it by running it through canopus as an svcd..that demuxed it then i used audacity to bump up the volume then used tmpg tools to remux it...it worked..like a charm..thanx for your input

moontrash