how can I repair the time in a mpeg video stream?

[Brit]

I have a dvd video that has some timing issue. It appears the time in the stream is running about double speed. The video is around 21 minutes, but some tools indicate that it is around 11 minutes.

The real problem came when I extracted the stream and was reducing the size with TMPG. It prosecced the stream fine for the first 11 minutes of the video (including keeping the sound in sync, no playback issues). At the 11 minute mark (half way through the video), the video frame froze, but the sound continued fine.

I checked that TMPG could read the entire video stream by testing it with the start and stop times. it could see the entire video stream. So the only other problem I knew I had with the stream was with the time values.

Is there any way to fix these types of time issues in the video stream?

thanks

[BJ_M]

you can re-do time stamps on a mpeg file with dvdlab, restream and pulldownGUI/pulldown.exe

though i'm not sure it will fix your problem ..

[pcexpress-guy]

Is there a way to use such a tool for such a problem, for ASF type files? can one convert ASF to mpg? (what simple tool, could do this?)

thanks!

[teegee420]

Is there a way to use such a tool for such a problem, for ASF type files? can one convert ASF to mpg? (what simple tool, could do this?)

Try converting to mpeg with TMPGEnc. Getting it to open your ASF might not work the first time. As long as you have the proper filters and WMP updates installed it should work. If you have any problems, start another thread in the Newbie Conversion forum(your questions would no longer be related to this thread).

[lordsmurf]

I 2nd RESTREAM

[Brit]

well, no luck so far.

restream didn't seem to do anything. I checked the "reset timestamps", but it didn't seem to help.

dvdlab also couldn't seem to fix the problem, but it did make the video time and sound time match, but I never had any sound sync problems.

I have been using windvd to check my time stamps, since the time the tmpg died matches what windvd says is the time of the video.

it seems odd that different tools are reporting different times for the piece:
windvd - 11:09
dvdshrink - 21:55 (sound reports this length)
dvdlab - 20:36 (21:55 after fixing timecode)
tmpg - 11:09 (and thus my problem)
powerdvd - can't tell. the time varied everytime i tried

I don't know whats going on here. any other ideas to try.

If I find anything else interesting, i'll add them.

thanks

[Brit]

oh, I just thought of something that might be important...

the original video had 2 angles and they were interlaced together. I used dvdshrink to set the start and stop times and reauthored the segment I am using. I wonder if this is what is causing my time to be half of what I want. and if so, then this may be a ripping problem more than a conversion problem.

20069 total frames / 29.97 frames per sec = 11:09 video. I guess the video is really at around 15 frames a sec.

is there a way to fix this? restream allows you to double the frame rate, but not half it.

any ideas?

thanks

[Brit]

ok, got it working. here's what I did just in case someone else ever is in the same situation.

1) using tmpg, De-multiplex the video stream
2) using restream, change the fps to 59.940
3) using tmpg, recompress the video stream with whatever options and compressions you desire, and also set the following
a) check "do not frame rate conversion" or stream will be double speed
b) check "source range" and select the first frame as the start, and the last frame as the end, don't use the -1 default. this seems odd, but if you don't, you get a result that is twice as long as needed, with the second half being blank.
4) using tmpg, multiplex the audio and video back.

it seems like a kludge, but it worked for me.