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View Full Version : Audio pitch slower and lags video by 2 seconds consistenly


krajyk
13th November 2002, 00:32
I have the same problem mentioned in the following thread where when I try the VCD header trick (create a SVCD and change the header information using TMPG to trick the DVD player your CD is a VCD) but get a delay of 2 seconds of audio plus the pitch is lower.

http://forum.doom9.org/showthread.php?s=&threadid=25983

Markrb mentions in this thread to, "try burning as a non compliant VCD" but I'm not sure what this means and how to burn a SVCD quality file on VCD.

Here are some of the things that I've tried.
1. Run DVD2SVCD in VCD mode. Successfully created VCD. But obviously quality not as good as SVCD.
2. Run DVD2SVCD in SVCD mode, use TMPG to change header of the mpg file, then recover the project, burn the cue/bin files. There must be SVCD information in the cue/bin files because when I try this method, even though I've changed the header, the CD itself looks like a SVCD and not VCD (if you browse through the directory structure, looks more like SVCD and VCD) and thus does not play in my DVD player.
3. Run DVD2SVCD in SVCD mode, use TMPG to change header of mpg file, then burn in Nero via the VCD mode and drag the newly create mpg file, gives warning that mpg file is not VCD compliant. This skips the cue/bin image burning method and works giving a very good quality SVCD video that plays in my DVD player but the audio is 2 seconds slower and has lower pitch. The funny thing is, the actual TMPG changed mpg file plays in WinDVD perfectly (audio in sync) but when I burn it, causes this problem.
4. Run DVD2SVCD in SVCD mode, burn the actual SVCD in Nero via the VCD mode and drag the SVCD mpg file, gives a warning message that the file is non compliant, and burn anyway. This plays but the frame just freezes at the first frame with grabled pixels. You can fast forward and see the frames but once you play it just stays on one frame.

Method three is the closest to the end product I am desiring except for the audio is two seconds off.

If there are other methods to try to get a SVCD quality in a VCD player, please let me know (including Markrb's burning of non compliant VCD method if its different from one of these methods).

Thanks,
krajyk

mrbass
13th November 2002, 02:10
you could try increasing your Startup times for video or audio in the bbmpeg advanced settings.

krajyk
13th November 2002, 02:21
MrBass,

First of all, the mpg file after all 4 methods mentioned gives me a synched file. Even when I change the header, everything is synched. Only after I burn the changed header file do I get this problem.

Now if I were to do the bbMpeg advanced settings, and speed up the audio, wouldn't the mpg file before burning show that the audio is too fast?

I guess the question might be, why is it inconsistent between mpg file and burned VCD? If the mpg file is not synched, then its obvious why a burned VCD would not be synched as well. But I'm confused because before burn, everything is ok but after burn its not. I just expect mpg file == burned VCD.

But in any case, I will try the advanced settings.

mrbass
13th November 2002, 03:14
actually I think it's two things (both dvd hardware related). One is your dvd player can't handle the bitrate past 1150Kbps (vcd standard) even though your tricking it..perhaps the decoder chip can't sustain that higher bitrate.

the bbmpeg startup delays tell your dvd player not to start one or the other until the dvd player gets going (this is a long shot though).

krajyk
13th November 2002, 03:29
This is a newbie question. When you say, doesn't support past 1150 bit rate, does that refer to both video and audio? Looking at the video of the SVCD tricked VCD, the quality of the video is noticeably better than the VCD counter part I created. I can tell the difference that in certain scenes, the VCD is very "blocky" but the SVCD tricked VCD is very nice looking. The only problem I have is the unsynched audio.
So if "player not supporting past 1150" refers to video, I must say I disagree.

Ben