Hi everybody,
I am in the process of learning converting PAL (25 fps) avi with AC3 5.1 sound into NTSC dvd with the original 5.1 audiostream.
My source is a 25fps avifile with 5.1 sound (created with AGK, XviD encoded). When I load it into VirtualDub, I get a black screen with the text "WARNING: NOTHING TO OUTPUT BFRAME DECODER LAG"
Does anyone know what is wrong? Or should I use another program to extract the AC3 file? A question that goes with it: can there be audio-delay in the AC3 stream of an avi file, just like with dvd-streams? At the end, where the resulting m2v file is remuxed with this AC3 stream, I need to know for proper muxing right?
Thanks in advance all
Ennio
+ Reply to Thread
Results 1 to 13 of 13
-
-
Most players are Pal and NTSC compatible-not all! Highly likely to incur sync issues if going 25fps to 30fps. Check if 100% necessary.
Had same issue today with an avi with 5.1 AC3 and that same message-ignore, still worked ok. Proceed as normal and save video only ( direct stream copy)-select 'no audio'. Now open up original file in VDubMod and 'demux' original 5.1 audio.
Encode to mpeg2/m2v and then mux files back together with an authoring program (e.g TDA). This should work fine without any sync issues.
I think your headaches will start if you demux original audio, convert Pal to NTSC and then remux! As mentioned-check if absolutely necessary and post back if need be.
AC3 sync issues mainly happen when joining ac3 files-AC3fix can help.
Sorry if not been much help. -
That is because you encoded with bframes and packed bitstream disabled. The message is generated by the decoder.
Yes avi's can have audio delays. -
Ok I just could extract the ac3 as wav and fix with besliced.
How do I know what the delay is of an avi?
thanks -
'File information' will give you info on times for audio and video to check for a delay.
Why save as wav and fix with Beslice? VDubMod:-use to extract AC3 as AC3. -
It's been a while since I dealt with avi files. In the past I always used VirtualDub. I simply didn't know about VirtualDubMod. Will download.
Thanks!
Edit: Ok, I have VirtualDubMod now and extracting the AC3 file goes sweetThanks!
Now, @ file information, the audiostream says:
Layout: 0.10s preload. Will this be the audio delay?
Thanks again guys -
Check the 'running times' for each-if they match then should be OK.
Or are you saying that your source audio is out of sync? If its not, then dont worry-'if aint broke...........'.
If it is, then it is a somewhat different process. -
No, my source audio is not out of sync. But I have to know the audio-delay if I remux the AC3 stream with a converted mpeg2 stream.
In virtualdubmod I also get the same warning. Extracting the AC3 stream seems to be ok but I cant import it in TMPGEnc DVD Author.
Now I tried AC3fix with windows gui, but nothing seems to happen?
Now, when I open the avi in NanDub, no warning, the extracted ac3 stream (save as wav, then correct with BeSliced) is directly accepted in DVD Author, only @ the file properties, I can't make out the delay. Strange hey?
Anybody has an idea? Thanks again -
I had the same problem you have. The .avi file worked perfect but when audio is extracted was a mess, no possible fix found. I tried the solutions stated here and other posts but it won't result.
Then I tried playing the video file on Winamp v5.21 with the Nullsoft Writer plug-in v2.11. The result: a perfect .wav file with the same name as video source.
Good Luck
Similar Threads
-
VirtualDub/Xvid question: YV12 vs. XVID FourCC in the xvidvfw.dll driver???
By KneeRow in forum Video ConversionReplies: 14Last Post: 1st Aug 2010, 13:35 -
How to get Xvid encoding in VirtualDub
By Dr_Asik in forum Newbie / General discussionsReplies: 9Last Post: 25th Feb 2010, 10:31 -
Virtualdub can not open xvid
By quxote in forum Newbie / General discussionsReplies: 2Last Post: 31st Jul 2009, 00:11 -
win98 xvid and virtualdub?
By dridge in forum Newbie / General discussionsReplies: 3Last Post: 10th Dec 2007, 22:34 -
Converting DV (on PC) to xvid through VirtualDub
By Wills in forum Camcorders (DV/HDV/AVCHD/HD)Replies: 12Last Post: 11th Jun 2007, 17:10