[AE] After Effects does not Read the Audio?

[Mike of the Desert] · Post by **[Mike of the Desert]** » Wed Aug 20, 2008 9:23 am

I have ripped a video from a DVD.
The first problem I found is that from the Avs to the AVI the video become unsynched.. But then problems just goes further.

The .ac3 Audio File demuxed by DGIndex isn't read by AE, and the Audio Stream of the video isn't recognized. Even changing the .ac3 to Wav (or Then the wav to mp3 just for test) AE does Not Read them..! How can this be possible? I can't find a solution and I'm really out of ideas.

mirkosp · Post by **mirkosp** » Wed Aug 20, 2008 9:31 am

Care posting the script of your avs? Also, how did you convert the ac3 stream to wav?

[Mike of the Desert] · Post by **[Mike of the Desert]** » Wed Aug 20, 2008 9:31 am

I have a posted a similiar error (with another DvD of the same project) Here, if any extra info could be useful. (Oh, when I said "Video Unsyched" I meat the synch between the Video's Original Audio)

[Mike of the Desert] · Post by **[Mike of the Desert]** » Wed Aug 20, 2008 9:35 am

mirkosp wrote:Care posting the script of your avs? Also, how did you convert the ac3 stream to wav?

Avs Scrypt:

Code: Select all

MPEG2Source("D:\LOGICAL VOLUME IDENTIFIER\MGS 0.1.d2v", cpu=4)
telecide(order=1,post=2,blend=true,vthresh=30,back=1)
decimate(cycle=5,mode=2,quality=3)
assumefps(24)
temporalcleaner()
tweak(sat=1.2)
converttorgb32()

And I converted the Ac3 to Wav using the Besweet from AmvApp.
I tried to cut a piece of the DVD to take another look and.. Nothing, the audio continue to be unsynched and unread by A.E..

[Mike of the Desert] · Post by **[Mike of the Desert]** » Wed Aug 20, 2008 9:42 am

Holy crap.

I found the solution to Synch the Original Video/Audio from the Avs to the Avi.
I've been a complete idiot with it.

But now the other problem is still in front of my eyes. <-
The Audio isn't read by A.E. and since it is a WAV this really is strange.
I think it could probably be a problem of memory, anyway.
The DVD lasts 1:30h so.. Since A.E. sometimes says "I can't handle over 1800 Seconds of Audio shorten your area", could be it? I'll do some tests.. Maybe I should work with many little comps?

Any advice will be tratened as Gold.

mirkosp · Post by **mirkosp** » Wed Aug 20, 2008 9:55 am

Uhm, I think that I know what the problem is...most likely, your DVD is PAL, so fps is 25. You can't IVTC it, you should just deinterlace it. Also, using assumefps to change the framerate will speed up/slow down the frames. In order to change the fps and keep the audio sync you should use changefps or convertfps (the first one will add/drop frames, the second one will blend frames... if your dvd is actually PAL and not NTSC, I highly discourage the second one, since your dvd most likely already has a lot of blending).
Also, I found that besweet doesn't convert ac3 to wav really well at times. I personally use besweet just for mp3 compression. If you need to convert an ac3 stream to wav, my personal suggestion would be getting dBpoweramp and then follow this to let it read ac3 files. After that, follow this guide to convert it to wav.
For audio files that winamp is able to open, though, I use that (winamp can't open ac3 files properly, though).

mirkosp · Post by **mirkosp** » Wed Aug 20, 2008 9:58 am

Seems that I was late with the reply.

Well, if AE isn't able to work with more than 1800 seconds of audio at time, then you should probably try to cut in parts your audio and work with many smaller comps, yeah.

[Mike of the Desert] · Post by **[Mike of the Desert]** » Wed Aug 20, 2008 10:07 am

Thanks really a lot for your help.
The DVD is indeed PAL and the Audio Synch problem was all my fault.
About the Deinterlacement.. Mh, Ok I got it, no IVTC.

I'm always proud of not being the Noob of the past times, but too many times I have to admit I'm going to do silly questions, sorry about this. By saying "You can't IVTC it" you mean that in my AVS scrypt I asked to do that. You mean that I used the wrong deinterlacer or that I have a useless line of scrypt? Thanks a lot.

It's quite strange though that a so powerful computer like this one can't handle a good amount of Audio.

mirkosp · Post by **mirkosp** » Wed Aug 20, 2008 11:25 am

[Mike of the Desert] wrote:By saying "You can't IVTC it" you mean that in my AVS scrypt I asked to do that. You mean that I used the wrong deinterlacer or that I have a useless line of scrypt? Thanks a lot.

Well, personally I'm not really used to telecide and decimate, but afaik, decimate is used to restore the 23,379 framerate for NTSC sources. Telecide can be used on pal too, though, but I think you should set the guide parameter to 2 (that's what the avtech suggests anyway). I personally just use tomsmocomp(1,5,1) to deinterlace my PAL sources and it works just fine. Blended frames will still be there, though.

It's quite strange though that a so powerful computer like this one can't handle a good amount of Audio.

It's not about how much powerful the pc is, it's just about the program. AE isn't really supposed to be used to work with footage that has a long duration, more to create effects of a rather limited amount of time. 1800 seconds would be 30 minutes, so I suppose that's really the longest timeline AE should be dealing with.

[Mike of the Desert] · Post by **[Mike of the Desert]** » Wed Aug 20, 2008 12:09 pm

I bet that AE would do the same Audio Error even with less than 30 Minutes, but I understand what you mean, you're right. (First time I've got the error with 5400, then with 1800, probably going down it could give the same error until the Comp is more "Human" for it).

Well, thanks for the help, I'll let you know how it will going.