Audio problems

kakomu · 14th July 2006, 06:01

I'm unable to extract the audio from my captured AVI files. I installed the panasonic DV codec. I used DVIO and WinDV to make 10 second clips of a movie I just shot. One of Type-1 and one of type-2.

In MPC:
Type-1 will play in MPC with audio just fine.
Type-2 will play in MPC but without audio.

In VDUB mod:
Type-1 gives me an error about audio. Doesn't show up in streams
Type-2 has an audio track, but when I try to demux it, it's really small and has no audio

As an AVS file in VDUB Mod
Type-1 will have an audio file and will be able to extract, but the audio file that's extracted is slown down by 1/2 speed or so.
Type-2 will do the same as the AVI.

I'm rather stumped. I'm not sure how to go about extracting the audio since none of the above methods worked correctly.

I looked in the file info for the Type-2 AVI and the audio is about .5 seconds long and listed as 1024kbps. It looks as though neither DVIO or WinDV are actually capturing the audio.

kakomu · 14th July 2006, 06:46

Update: I took a type-1 AVI that played fine in MPC and used a program to convert the file into a Type-2 AVI. The resulting avi had the same .5 seconds of audio.

kakomu · 14th July 2006, 07:30

update: I used Ulead's DV converter software. It produces a working Type-2 avi file, but the audio has a horrible ringing sound.
Canopus's DV converter worked. However, that doesn't explain why so many other methods didn't work...

Does anyone know why I may not have been able to create a working Type-2 avi file with WinDV and DVIO?

bb · 14th July 2006, 11:06

Did you use 32 kHz Audio?

bb

kakomu · 14th July 2006, 17:20

No, I believe I used 48khz/16-bit audio.

I just set the camera to 12-bit and extracting a type-2 avi worked this time. Is 16-bit/48khz out of spec or do I need special software to pull such audio from the tape?

UofC · 14th July 2006, 19:37

Quote:

Originally Posted by kakomu

I just set the camera to 12-bit and extracting a type-2 avi worked this time. Is 16-bit/48khz out of spec or do I need special software to pull such audio from the tape?

You have a tape of it? Why not do a re-recording or have you tried this already?

How are you capturing it and with what hardware?

kakomu · 14th July 2006, 20:13

Quote:

Originally Posted by UofC

You have a tape of it? Why not do a re-recording or have you tried this already?

How are you capturing it and with what hardware?

When I said I set it to 12-bit, I meant that I set the camera to record at 12-bit and recorded a clip which captured correctly.

No, I can't re-record, since the tape was of me doing a bit of work (taking apart an LCD monitor).

I'm working from a Canon optura 50, through IEEE 1394 and using DVIO and WinDV as my capture programs.

So, as a recap: recordings I made with 16-bit audio don't capture correctly with type-2, but recordings I made with 12-bit audio do capture correctly.

kakomu · 19th July 2006, 15:01

Again, why would the capture programs capture 12-bit audio fine, but not 16-bit audio?

bb · 20th July 2006, 06:26

Usually it's the other way round: sometimes there are problems with 32 kHz audio, but not with 48 kHz.

bb

14th July 2006, 06:01	#1 \| Link
kakomu Registered User Join Date: Dec 2001 Location: chicago Posts: 139	Audio problems I'm unable to extract the audio from my captured AVI files. I installed the panasonic DV codec. I used DVIO and WinDV to make 10 second clips of a movie I just shot. One of Type-1 and one of type-2. In MPC: Type-1 will play in MPC with audio just fine. Type-2 will play in MPC but without audio. In VDUB mod: Type-1 gives me an error about audio. Doesn't show up in streams Type-2 has an audio track, but when I try to demux it, it's really small and has no audio As an AVS file in VDUB Mod Type-1 will have an audio file and will be able to extract, but the audio file that's extracted is slown down by 1/2 speed or so. Type-2 will do the same as the AVI. I'm rather stumped. I'm not sure how to go about extracting the audio since none of the above methods worked correctly. I looked in the file info for the Type-2 AVI and the audio is about .5 seconds long and listed as 1024kbps. It looks as though neither DVIO or WinDV are actually capturing the audio. Last edited by kakomu; 14th July 2006 at 06:23.

14th July 2006, 07:30	#3 \| Link
kakomu Registered User Join Date: Dec 2001 Location: chicago Posts: 139	update: I used Ulead's DV converter software. It produces a working Type-2 avi file, but the audio has a horrible ringing sound. Canopus's DV converter worked. However, that doesn't explain why so many other methods didn't work... Does anyone know why I may not have been able to create a working Type-2 avi file with WinDV and DVIO? Last edited by kakomu; 14th July 2006 at 07:33.

14th July 2006, 17:20	#5 \| Link
kakomu Registered User Join Date: Dec 2001 Location: chicago Posts: 139	No, I believe I used 48khz/16-bit audio. I just set the camera to 12-bit and extracting a type-2 avi worked this time. Is 16-bit/48khz out of spec or do I need special software to pull such audio from the tape? Last edited by kakomu; 14th July 2006 at 17:32.

14th July 2006, 06:46	#2 \| Link
kakomu Registered User Join Date: Dec 2001 Location: chicago Posts: 139	Update: I took a type-1 AVI that played fine in MPC and used a program to convert the file into a Type-2 AVI. The resulting avi had the same .5 seconds of audio.

14th July 2006, 11:06	#4 \| Link
bb Moderator Join Date: Oct 2001 Location: Germany Posts: 2,665	Did you use 32 kHz Audio? bb

19th July 2006, 15:01	#8 \| Link
kakomu Registered User Join Date: Dec 2001 Location: chicago Posts: 139	Again, why would the capture programs capture 12-bit audio fine, but not 16-bit audio?

20th July 2006, 06:26	#9 \| Link
bb Moderator Join Date: Oct 2001 Location: Germany Posts: 2,665	Usually it's the other way round: sometimes there are problems with 32 kHz audio, but not with 48 kHz. bb