Quantcast Jerky VCD Playback? - digitalFAQ.com Forums [Archives]
  #1  
01-27-2003, 02:08 PM
miksmith miksmith is offline
Free Member
 
Join Date: Nov 2002
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
Having cut my MPG to an 80min CD the playback is pretty jerky on my stand alone player (hasnt been a noticeable problem in the past). It plays about 0.5sec then the picture noticeably jumps to the next (nth?) frame; obviously more of a problem on actio scenes. Looking at the original MPG and playing it back on the PC it is not jerky at all.

Is there a reason for this?

mike

P.S. Using latest version of VCDEasy
Reply With Quote
Someday, 12:01 PM
admin's Avatar
Site Staff / Ad Manager
 
Join Date: Dec 2002
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
  #2  
01-27-2003, 03:01 PM
andybno1 andybno1 is offline
Free Member
 
Join Date: Jul 2002
Location: Liverpool, UK
Posts: 832
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via MSN to andybno1 Send a message via Yahoo to andybno1
yeah know what you mean, I done divx to kvcd and near the begining of the movie the camera zooms in which should be smooth but its jerky its like it pauses every so many frames.
Reply With Quote
  #3  
01-27-2003, 05:51 PM
noize noize is offline
Free Member
 
Join Date: Jan 2003
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Hello

What about the sound?

I ask because i had the same problem with an early encoding experiment of mine: the video was jerky, AND the audio had a slightly lower pitch than normal, I mean the voices were lower, as if played at a slow speed, even if the sound was in perfect sync with the picture...

At first i thought it could be a video bitrate problem, then i realised that my player wanted me to downsample the audio to 44100 khz.

Now everything's fine.

Hope this helps.
Reply With Quote
  #4  
01-27-2003, 06:32 PM
andybno1 andybno1 is offline
Free Member
 
Join Date: Jul 2002
Location: Liverpool, UK
Posts: 832
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via MSN to andybno1 Send a message via Yahoo to andybno1
sound was fine for me just when the camera zoomed it was jerky.
Reply With Quote
  #5  
01-28-2003, 03:50 AM
miksmith miksmith is offline
Free Member
 
Join Date: Nov 2002
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
In fact, I have stuck this CD back in my PC and played it back there and it isnt jerky playback at all.

I guess it must be something to do with my stand alone player (Cyberhome ADL 52, but it doesnt do it to all disks.
Reply With Quote
  #6  
01-28-2003, 04:25 AM
rhino rhino is offline
Free Member
 
Join Date: Jan 2003
Location: Back in Ireland (for a while)
Posts: 166
Thanks: 0
Thanked 0 Times in 0 Posts
@milksmith:

I have a cyberhome ADL528 and there issues with this machine. Just go to http://forum.cyberhome-help.de to learn more about that.

Also, there are different firmwars and people have had different results. One of the things that has been noticed is, (S)VCD's in ntsc format seem to play better when the machine is set to PAL mode.

And or course, always make sure you use the correct template when authoring. I did a few ntsc films in pal template under VCDEasy and Nero and this caused frequent jumping.

Cheers,
Reply With Quote
  #7  
01-28-2003, 04:36 AM
miksmith miksmith is offline
Free Member
 
Join Date: Nov 2002
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
Many thanks for the pointers. I have upgraded the firmware to 10.01. Not sure if this helps (or not!) though, but this page

http://www.harkcom.demon.co.uk/cyber-pages/bugs.htm

suggests that there is a "stuttering" effect apparant. That site also has ISO images of past firmwares so its possible that they might solve the problem but then you lose the fixes of 10.01

Which firmware do you have??
Reply With Quote
  #8  
01-28-2003, 04:48 AM
rhino rhino is offline
Free Member
 
Join Date: Jan 2003
Location: Back in Ireland (for a while)
Posts: 166
Thanks: 0
Thanked 0 Times in 0 Posts
I am using 10.01. I have just tried a ntsc film done using KVCDx3 Mpeg-1. Setting the player to NTSC mode and playing the disc causes it to be jerky, but switching the machine to PAL, it plays back smoothly.

I tried muxing with TmpgEnc and bbMpeg and the results where still the same.

I have heard that playback is supposedly better with the previous firmware (also available from that site). I'll try later downgrading the firmware and see what happens.

If you read the forum, there is a large debate over whether 10.01 is better or worse.

Cheers,
Reply With Quote
  #9  
01-28-2003, 05:19 AM
andybno1 andybno1 is offline
Free Member
 
Join Date: Jul 2002
Location: Liverpool, UK
Posts: 832
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via MSN to andybno1 Send a message via Yahoo to andybno1
I have a alba dvd 114 how do I update my firmware?
Reply With Quote
  #10  
01-28-2003, 05:24 AM
miksmith miksmith is offline
Free Member
 
Join Date: Nov 2002
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
Just upgraded to the previous firmware (15e20-13-0927) and this has solved the stutter problems totally. VCD's play very smoothly now. Looking at the bugs page for 10.01 it sure sounds like they need to release a new firmware pretty quick!

Thanks for the thoughts!

m
Reply With Quote
  #11  
01-28-2003, 05:34 AM
rhino rhino is offline
Free Member
 
Join Date: Jan 2003
Location: Back in Ireland (for a while)
Posts: 166
Thanks: 0
Thanked 0 Times in 0 Posts
They don't make the adl528 anymore. It has been replace with the 302, 405, 505. So the likely hood of them releasing a new firmware is low. But you never know

Must go back to 15e20-13-0927 and see if this how this looks.

@andybno1:

I don't know the alba machine (though it gets good reviews). Check out the manufacturer's website and see if they offer firmware upgrades or have a search in google for something.

Cheers,.
Reply With Quote
  #12  
01-29-2003, 05:20 AM
bax2097 bax2097 is offline
Free Member
 
Join Date: Jan 2003
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
In my experience there are two reasons (They may be many more), why you get jerky video conversion, they are:

1. The orginal video was encoded in NSTC and you converted to PAL. To cure this use NTSC conversion instead if you can.
2. The motion prediction is set too fast, to cure this use 'Fast motion prediction(Slow)', instead of normal, etc.
Reply With Quote
  #13  
01-29-2003, 05:00 PM
miksmith miksmith is offline
Free Member
 
Join Date: Nov 2002
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
In this instance the playback was fine on the PC, just on the player. Seems like its a firmware problem for *some* VCD's. It was a PAL video encodeda s PAL at the slowest motion search setting using 1/2 DVD. THe results are really excellent.

Rhino:
How did the upgrade (downgrade!) go? Much of a difference?
Reply With Quote
  #14  
01-30-2003, 03:27 AM
rhino rhino is offline
Free Member
 
Join Date: Jan 2003
Location: Back in Ireland (for a while)
Posts: 166
Thanks: 0
Thanked 0 Times in 0 Posts
@miksmith:

Haven't been at home long enough to try anything. Probably be next week before i get around to this. Interestingly though, on 10.01 VCD's seem to play nicely when the output of the player is set to PAL (even for NTSC).

The nice thing about 10.01 is you can turn off macrovision. This always kicks in when i play region 1 dvd's, even though it is the original in the player and it is going straight into the TV, and not via the VCR.

Cheers,
Reply With Quote
  #15  
01-30-2003, 08:52 AM
Racer99 Racer99 is offline
Free Member
 
Join Date: Sep 2002
Location: Massachusetts
Posts: 119
Thanks: 0
Thanked 0 Times in 0 Posts
Try opening the clip with Bitrate Viewer. Pay particular attention to the Peak bitrate. I have found that with CQ I have have seen bitrate spikes to say 2800. My Panasonic RV-31 doesn't like anything about 2600. It then cause it to jerk and stutter like you say.

Just a thought

Racer99
Reply With Quote
  #16  
01-30-2003, 10:01 AM
nicksteel nicksteel is offline
Free Member
 
Join Date: Nov 2002
Posts: 863
Thanks: 0
Thanked 0 Times in 0 Posts
Where is best guide for creating menus with KVCDx3? I have absolutly no experience with this.
Reply With Quote
  #17  
01-30-2003, 11:44 AM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by nicksteel
Where is best guide for creating menus with KVCDx3? I have absolutly no experience with this.
Hi nicksteel,

Any VCD guide will work. I recently bought a book "From VHS Video to DVD" which talks about a program "MovieXone" which you can use to make menus. What you do is make all your clip effects ( dissolves, etc. ) and convert these clips with your menu buttons and all to small mpeg files. Then it's just a matter of adding them with VCDEasy before your main movie . There's a free vesion available. Try it out http://www.aistinc.com/products/moviexone.asp

-kwag
Reply With Quote
  #18  
01-30-2003, 01:21 PM
ARAGORN ARAGORN is offline
Free Member
 
Join Date: Oct 2002
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Hi Kwag!

Here in France we have a great program called all4(S)VCD that give you the possibility to create animated presentations ( for example it captures one minute of each chapter in bmp format) that you can encode with tmpgenc. you also put song. It creates bin cue with chapters and presentations directly that you can burn with nero. It has a lot of other options that i cannot describe here For those who can understand french it's incredible and freeware.

Here' the link: www.formidable.fr.st


ARAGORN
Reply With Quote
  #19  
01-30-2003, 01:35 PM
kwag kwag is offline
Free Member
 
Join Date: Apr 2002
Location: Puerto Rico, USA
Posts: 13,537
Thanks: 0
Thanked 0 Times in 0 Posts
Hi ARAGORN,

Will take a look at that

Thanks,
-kwag
Reply With Quote
  #20  
01-31-2003, 03:15 AM
miksmith miksmith is offline
Free Member
 
Join Date: Nov 2002
Posts: 74
Thanks: 0
Thanked 0 Times in 0 Posts
Racer99

Good point! I had actually thought about bitrates but hadnt bothered checking it. Anyways, my KVCD LBR peaks at 1621, with an averageof 709, whilst the 1/2 DVD peaks at 2367 and averages 1700. I guess the average is a fairly good estimate of what sort of bitratesa player will support, althoughthe standard deviation would probably be more useful. It might be quite a useful idea to compile a list of players (and firmwares!) that support different templates (perhaps useful defined settings and a reference 5min?? file) which would allow people to limit the max bitrate. High action is obviously where the problems are as the bitrates really spike.

Kwag, might it be worth setting this up as a sticky message??
Reply With Quote
Reply




Similar Threads
Thread Thread Starter Forum Replies Last Post
jerky playback from MPEG? g8o4lyf Video Encoding and Conversion 20 04-11-2004 07:56 PM
avi to kvcd has Jerky playback? toxicpoison Video Encoding and Conversion 16 12-31-2003 01:39 PM
KVCD: Jerky playback? starclone Video Encoding and Conversion 1 09-26-2003 03:27 AM
KVCD has JERKY PLAYBACK? porritt Video Encoding and Conversion 3 09-15-2003 04:11 PM
KVCD: What can cause jerky playback? jshew Video Encoding and Conversion 10 04-17-2003 04:47 PM

Thread Tools



 
All times are GMT -5. The time now is 01:52 AM  —  vBulletin Jelsoft Enterprises Ltd