Burned DVD Jerky Video

rckowal · Post by **rckowal** » Thu Feb 18, 2010 11:54 pm

As a newbie, I'm still working my way through VS 11.5. I created a short 5 minute movie which was burned to DVD to learn more about how the process works.

Although the DVD plays the video smoothly at first, it gradually begins to jump/twitch when played on my PC using RealPlayer. This becomes noticeable at about 2 1/2 minutes then objectionable near the end. The project file plays smoothly from start to finish.

The video was originally captured from a DV camcorder to my HDD as an avi file using fire wire. I then edited & saved it as a project file. That file was rendered as an MPEG then burned to the DVD. If it matters, the DVD used was an erased re-writable.

Although I realize that there maybe a need for additional information to diagnose this situation, I don't know what it is. If some one will tell me what is needed, I'll post it.

skier-hughes · Post by **skier-hughes** » Fri Feb 19, 2010 12:08 am

Did you use any other files in the movie?
What were the settings used for making the mpeg dvd file?
Does it jump and jitter on both pc and dvd player?
Did you make the mpeg and burn it all in one go? O
Or did you make an mpeg file which is saved on your hdd first?
If you did, does this mpeg play ok?

Black Lab · Post by **Black Lab** » Fri Feb 19, 2010 12:20 am

Here's the list of additional info:
http://forum.corel.com/EN/viewtopic.php?t=8959

rckowal · Post by **rckowal** » Fri Feb 19, 2010 3:00 am

Thanks for replying Skier-Hughes,

skier-hughes wrote:Did you use any other files in the movie?

I'm not sure what you mean here. The file consists of split scene clips from one avi capture with nothing added other than a standard VS title template at the start.

What were the settings used for making the mpeg dvd file?

If you mean Project Settings: MPEG properties for file conversion, they were.
MPEG files 24 bits. 720 x 480. 29.97 fps
Lower field first DVD-NTSC 4.3
Video data rate. 9800 kbps
Audio data rate. 256 kbps
Dolby Digital Audio. 48 KHz. 2/0(LR)
Do not convert compliant MPEG files checked

Does it jump and jitter on both pc and dvd player?

Yes

Did you make the mpeg and burn it all in one go?

Yes

Or did you make an mpeg file which is saved on your hdd first?

MPEG file is on HDD but I believe it was saved at the end of the burn.

If you did, does this mpeg play ok?

Yes it plays smoothly.

extremekicks · Post by **extremekicks** » Fri Feb 19, 2010 5:28 am

Some thoughts....

How old is your system? Does it have the RAM and Processor speed?

Is your burner good? Have you cleaned it lately with a disk cleaner?

Plus you should use a fresh DVD with nothing that has been put on it.

Also where you saving your files? I ran into problems when my space size was low and my project would skip frames.

Also when you capture are you dropping frames?

If you took the footage off another cam and captured it on another the frame rates may be diffenrt per cam. This happens on my Canon XL2 and GL2.

B

Post by **Ken Berry** » Fri Feb 19, 2010 7:05 am

Although it is within the limits of the international DVD standard, your video data rate for the mpeg-2 is rather high. Many of us here use no more than 8000 kbps since many stand-alone DVD players in particular can have difficulty with bitrates much above that.

I also never burn a DVD at the speed rated for that disc. Instead, I usually burn at about half the rated speed (e.g. for an 8x disc I would burn at 4x; for 20x disc I would burn at 8x or 10x...) The idea is that the slower burn speed allows the burning laser slightly more time to more firmly embed the signal into the disc. Sometimes DVDs which are burned at too fast a speed can get jittery and jump about a bit, or simply stop dead...

rckowal · Post by **rckowal** » Fri Feb 19, 2010 3:26 pm

Thanks for replying extremekicks

Some thoughts....How old is your system? Does it have the RAM and Processor speed?

System is several years old. P4 dual core 3.6 with 1GB RAM.

Is your burner good? Have you cleaned it lately with a disk cleaner?

Haven't cleaned it for awhile but I just burned other full length 2 hour movies (not made on VS) & they play fine on this PC & my stand alone DVD player as well.

Plus you should use a fresh DVD with nothing that has been put on it.

I was planning on trying that next.

Also where you saving your files? I ran into problems when my space size was low and my project would skip frames.

VS files & original footage are saved on HDD. At the moment, it still has 31GB free on a 142GB partition. Question: Does the amount of free VS "temp" file space affect burning? How about writing speed? VS doesn't allow much latitude - minimum is 12X or Maximum (whatever that really means?) Ken Berry's comments in this post suggest that burn speed can be quite important.

Also when you capture are you dropping frames?

Yes, some frames are being dropped.

If you took the footage off another cam and captured it on another the frame rates may be different per cam. This happens on my Canon XL2 and GL2.

Footage was originally on an analog cam then was later passed through onto Mini DV tape in a different cam. But if it means anything, others on this forum have done the same thing using the same cams.

rckowal · Post by **rckowal** » Fri Feb 19, 2010 3:32 pm

Thanks Ken Berry for replying.

Although it is within the limits of the international DVD standard, your video data rate for the mpeg-2 is rather high. Many of us here use no more than 8000 kbps since many stand-alone DVD players in particular can have difficulty with bitrates much above that.

I'll try dropping the rate back to 8000.

I also never burn a DVD at the speed rated for that disc. Instead, I usually burn at about half the rated speed (e.g. for an 8x disc I would burn at 4x; for 20x disc I would burn at 8x or 10x...) The idea is that the slower burn speed allows the burning laser slightly more time to more firmly embed the signal into the disc. Sometimes DVDs which are burned at too fast a speed can get jittery and jump about a bit, or simply stop dead...

I appreciate the point you make but VS minimum burn speed is 12X, &/or Maximum. Are you burning with some other software?

skier-hughes · Post by **skier-hughes** » Fri Feb 19, 2010 5:11 pm

PC maintenance is always a good idea, but I'd opt for Ken's suggestion of dropping back the video bitrate and I'd go for 7500, so coupled with the audio bitrate of 256 you don't exceed 8000.
As the mpeg plays smoothly on the pc we know it's got to be in the dvd authoring / burning stages, so if you have a dvd drive cleaner, use it, then drop bitrates and try again.

skier-hughes · Post by **skier-hughes** » Fri Feb 19, 2010 5:16 pm

Minimum burn speed will depend on the burn rating of the discs you are using, but in general it's best to burn slower rather than faster.
Make sure the burn speed of the discs is compatible with your burner, if it's an old pc the new fast burn discs may not work properly in your drive.
Also ensure you have the latest firmware for your dvd burner, this helps in using newer discs in older drives.

Black Lab · Post by **Black Lab** » Fri Feb 19, 2010 5:22 pm

Yes, some frames are being dropped.

This should never happen. Might be related to your problem, might not, but you should get to the bottom of it.

Post by **Ken Berry** » Fri Feb 19, 2010 5:42 pm

Sorry ... I am travelling overseas at the moment and only have a netbook with me, which is not up to having a video editing program like VS on it. I thus cannot check about the burning speed thing in the VS burning module. Hopefully someone else will be able to check. But I seem to recall that the burning speed was not fixed, and certainly not 12x... though that of course would depend on the rated speed of the blanks you are using.

rckowal · Post by **rckowal** » Fri Feb 19, 2010 5:49 pm

Black Lab wrote:
Yes, some frames are being dropped.
This should never happen. Might be related to your problem, might not, but you should get to the bottom of it.

The dropped frames occur during the capture but I think they may have been caused by some damaged (right word???) clips. These are visible as blocky (with no intended video information) clips even when the video is played on the cam itself. However, these damaged clips are edited out before rendering & burning - if that matters.

rckowal · Post by **rckowal** » Fri Feb 19, 2010 5:52 pm

Ken Berry wrote: But I seem to recall that the burning speed was not fixed, and certainly not 12x... though that of course would depend on the rated speed of the blanks you are using.

I just discovered that the burn speed options change if there is a blank disc in the burner. I was apparently seeing default speed options without a disc.

Black Lab · Post by **Black Lab** » Fri Feb 19, 2010 6:51 pm

The dropped frames occur during the capture but I think they may have been caused by some damaged (right word???) clips. These are visible as blocky (with no intended video information) clips even when the video is played on the cam itself. However, these damaged clips are edited out before rendering & burning - if that matters.

That certainly could cause dropped frames.