Quantcast KVCD Has Jerky Playback? - digitalFAQ.com Forums [Archives]
  #1  
05-12-2003, 01:55 AM
miksmith miksmith is offline
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Encoded using 1/2 DVD template through ToK for a 2.5hr movie onto 1 80min CD. Gave a CQ of 62. My player seems to have problems with higher bit-rates so I dropped it to 2000 however playback appears jerky. It will play fine for 20-30s then pause momentarily and then play on OK.

Any ideas??

Thanks

m
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  #2  
05-12-2003, 08:14 AM
kwag kwag is offline
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Quote:
Originally Posted by miksmith
Any ideas??

Thanks

m
Could it be the MIN bit rate, instead of the MAX

-kwag
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  #3  
05-13-2003, 08:20 AM
NoDRoGG NoDRoGG is offline
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It could be 2 things in my opinion:
- my Pioneer dv-444 can't handle bitrates lower than 650kbit
(like Kwag said) and
- mpeg2 support with Pioneer 444 (your 1/2 dvd template) isn't very good,
especially not at low bitrates.

You could try the mpeg1 kvcdX3 template with a min bitrate of 650.
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  #4  
05-13-2003, 12:01 PM
miksmith miksmith is offline
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Many thanks for the suggestion. I upped the bitrate to 400 but it didnt help. I might try uppping it to 650 and see the result. Other VCD's done at 1/2 DVD seem to work OK though.
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  #5  
05-13-2003, 01:36 PM
Perfect Cell Perfect Cell is offline
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I have made many KVCD, and the most of them are based in DVD (source material), but in some of my KVCD I have see the problems you have posted: some jerky playback and/or sound problems in some parts of the movies, but the movie still plays ok in other parts.

I think the problem is when we droped the fps from the DVD from 29.97 to 23,97 (force film). In some movies, this works very well, but in some other movies, this results in a total mess.
The only way I found to resolve this problem was to make my KVCD with mpg2 and select the 3:2 pulldown to make the DVD restore the original 29,97.

After I started to make this, all of my KSVCD doesnt have sound problems or jerky playback.
Its sad the 3:2 pulldown aonly works for mpeg2, I wish I can use it with mpeg1.
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  #6  
05-13-2003, 05:04 PM
kwag kwag is offline
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Quote:
Originally Posted by Perfect Cell
Its sad the 3:2 pulldown aonly works for mpeg2, I wish I can use it with mpeg1.
Try it! It works with MPEG-1 files too
Just encode as MPEG-1 at 23.976, and then run "pulldown.exe" against your .m1v file. It will create a new file "pulldown.m2v", and use that to mux with your audio

-kwag
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  #7  
05-14-2003, 05:05 AM
miksmith miksmith is offline
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Just to confirm something:

All DVD's are encoded at 30fps?? When I encode for MPEG1 on PAL it then converts to 24fps?

Where do you find pulldown.exe?? I thought it might have been a standalone shipped with TMPEGEnc but couldnt see it.

m
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  #8  
05-14-2003, 07:43 AM
Perfect Cell Perfect Cell is offline
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At least, all the DVD´s I have see until now are encoded with 29,97 fps, and doesn´t matter if the video was progressive or interlaced.

The only thing "different" I noticed was all the music DVDs are interlaced, but most of the movies DVD are progressive.

I know the TMPGEnc have a internal pulldown routine, so you have nothing to select to make the pulldown movie ( the method I use ). I think the only pulldown program I ever saw was in the DVD2SVCD bundle, and I will try this one in the next movie I have to make.
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  #9  
05-15-2003, 08:55 AM
miksmith miksmith is offline
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Managed to find pulldown and a GUI frontend for it as well. If you want it Ive stuck it here in a self-extracting archive:

http://www.hsm.org.uk/pulldown.exe

You might need VB6 runtime files.

m
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  #10  
05-15-2003, 09:00 AM
kwag kwag is offline
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All (Most!) DVDs are encoded 23.976fps with 3:2 pulldown. That's why it looks like it is 29.97fps. All (MOST!) movies are shot "FILM", which is 24fps.
That's why we use "Force FILM" in DVD2AVI to remove the rff flags and encode at the original frame rate it was filmed

-kwag
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  #11  
05-15-2003, 09:09 AM
miksmith miksmith is offline
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Quote:
All (Most!) DVDs are encoded 23.976fps with 3:2 pulldown. That's why it looks like it is 29.97fps. All (MOST!) movies are shot "FILM", which is 24fps.
That's why we use "Force FILM" in DVD2AVI to remove the rff flags and encode at the original frame rate it was filmed
Not being overly familiar with some of these aspects here

why is it called 3:2 pulldown?
why do you say thats why it look like it is 29.97fps
for this encode I didnt use Force Film (one of the guides mentions it and another doesnt!) in DVD2AVI. What does this do?? I assume rff flags are "markers" in the encoded file which DVD2AVI ignores.

Thanks for your help!

m
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  #12  
05-15-2003, 09:19 AM
miksmith miksmith is offline
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P.S. I assume when I do pulldown it essentially makes the KVCD an NTSC one. Does this matter in any way??
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  #13  
05-15-2003, 09:32 AM
miksmith miksmith is offline
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P.P.S. Just used pulldown and re-burnt the KVCD. Made the movie *much* smoother but has put the video and audio totally out of sync (but about 15s)!!!

Life never gets any easier!
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  #14  
05-15-2003, 09:59 AM
kwag kwag is offline
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Hi miksmith,

You use "pulldown.exe" if you encoded at 23.976. Not if you encoded at 29.97
Your original material must also be 23.976 in order to encode at 23.976.
So you had to use "Force FILM" when you created your .d2v project file. That is if your DVD is "FILM"

-kwag
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  #15  
05-15-2003, 10:13 AM
miksmith miksmith is offline
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Loading the original VOB files into DVD2AVI Ive noticed that it lists the fps as 20!! Wasnt what I was expecting. Is this the source of my problems?
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  #16  
05-15-2003, 10:34 AM
kwag kwag is offline
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Quote:
Originally Posted by miksmith
Loading the original VOB files into DVD2AVI Ive noticed that it lists the fps as 20!! Wasnt what I was expecting. Is this the source of my problems?
What the hell is that
I've never seen that!, and that's obviously a problem

-kwag
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  #17  
05-15-2003, 10:42 AM
bman bman is offline
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U probably have PAL movie and have made d2v file with force film checked .
Uncheck FORCE film and make new d2v file .
bman
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  #18  
05-22-2003, 06:43 AM
miksmith miksmith is offline
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Heres a screen shot of the status windowd from DVD2AVI. Weird (its from a Region 2 Harry Potter and Phil Stone in PAL).

By the way, am I right in thinking that I only need FORCE FILM if I have an NTSC film which I want to encode as PA?

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