Deleting the AC3 Audio Portion of AVI file

[Lyris]

Hey there,

I am working on a PAL DEFT conversion of an NTSC Interlaced TV show on DVD.

I have ripped all my files and am saving each block as an AVI with VirtualDubMod, however this leaves the AC3 audio track in the AVI file. Since I plan to stitch them together and encode them with ProCoder, I need the AC3 part to be deleted, because ProCoder thinks the file is corrupt with the AC3 part still in there.

I could simply use VirtualDub and choose No Audio and save the files again, but they're very large so space constraints mean I can't do this. Plus, this takes time.

So is there a program that will simply delete the AC3 part of the AVI file without transcoding? Thanks!

[deadpac]

So is there a program that will simply delete the AC3 part of the AVI file without transcoding? Thanks!

If you don't mind using AVISynth and can get it to play nice with VFAPI Reader then you could use a pseudo AVI that doesnt' have any sound. First install AVISynth and VFAPI Reader. Then create a text file that has the same name as the avi you want to convert and rename the extension to avs. Put the following line into that script minus the # comments.

AviSource("x:\youravifilehere.avi", false)
# ,false in order to disable the audio in the file
# x:\ being the drive/folder your avi file is located at
# but as long as the avi file and avs script are in the same location
# then the drive/folder is usually not needed

After saving your script just start up VFAPI Reader, click Add File and open the avs script you just created; the input file should show the avs script you just loaded and an output file will show up as the your file name with the added "_avs_vfapi" tacked on right before the extension, in the Options box in that same window make sure Video Output and Video Output by VFAPI Reader Codec are checked. And since audio was disabled in the script the Audio Output box should be greyed out and unselectable. Click OK and back in the main VFAPI Reader window just hit convert, since there is no audio conversion shouldn't take more than a couple of seconds.

You should now have your original avi file, and AVS script witht the same name, and your newly wrapped "_avs_vfapi" version of your avi file. Don't worry about space either because the vfapi avi file shouldn't be more than a couple of mbs in size. You can close the VFAPI Reader program right after conversion is done and test it by opening up the file in VirtualDub; since there was no processing of the video inside the avs script the video should look identical to your original avi file. A File > File Information should show video information and no audio information.

Since I plan to stitch them together and encode them with ProCoder

If you want to get a little more complicated with your AVS script you could combine the avi files together with just one AVI script

video1=AviSource("avifilenumber1.avi", false)
video2=AviSource("avifilenumber2.avi", false)
video3=AviSoucre("avifilenumber3.avi", false)

#Spliced together below
video1+video2+video3

Haven't used splice function of AVS in a while but I'm pretty sure all the spliced files must share the same framerate and width&height.