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Jerky QT footage on TV screen

Displaying 1 to 13 of 13 matches.
magicapuglia
Posted Fri Mar 1, 2013 4:44PM

Hi some time ago I've purchased some Quicktime clips to be used in a standard DV 720x576 PAL project. The QT clips are also encoded using the 720 x 576 PAL format, their frame rate is standard 25fps, but when I render my project to DVD (I'm using Edius 6.5) and watch it on the TV screen the iStockPhoto portions playback is jerky and broken. Please how can I fix this? Should I convert them to a lower-end, lighter format (i.e. AVI DV) or set the field order from 'Progressive Scan' to 'Lower Field First'? Thank you and let me know.
Whiteway
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Posted Sat Mar 2, 2013 12:14AM
I suggest you post this in the Video forum.
kelvinjay
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Posted Sat Mar 2, 2013 1:03AM
Lets move it over there and see if anyone can offer any suggestions.
Daedalum
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Posted Sat Mar 2, 2013 1:33AM
can you define jerky and broken any better ?
Spencer_Whalen
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Posted Sat Mar 2, 2013 2:14AM

Has your DVD project got any other video formats within it? How did you edit the video? Is the DVD Pal or NTSC? How did you render your final video ready for encoding to DVD?


If you let us know the above I'm sure we can help you out!
magicapuglia
Posted Sat Mar 2, 2013 3:34AM

Yes, my project does contain other video formats: most source files are encoded using the AVI DV format. The DVD is PAL, I encoded it using the Edius 'Burn DVD' built in option


@Dedalum jerky and broken means the video playback is shaky, flickering,  stops and starts running again...
Daedalum
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Posted Sat Mar 2, 2013 3:56AM

shakey and flickering sounds like you may have the fields round the wrong way, does it look like its playing frames  like this : 2,1,4,3,6,5 etc ? if so then check your fields.


flickery, hmm more info of whats flickery, frame rate, image, image distortions etc, are you re- scaling the layer ?


are you rendering at 25 fps ? you only mention your source is 25 fps.


pauses could be hard drive/computer speed possibly, what kind of pauses do you get ?
magicapuglia
Posted Sat Mar 2, 2013 4:19AM

No the frame playback order is correct. When I say flickery I mean the image shivers. I am rendering at 25fps and this is also my iStockPhoto clips frame rate. No scaling or distortion was applied to those clips. Each pause takes just few milliseconds, I'm not saying the video stops at all.
magicapuglia
Posted Sat Mar 2, 2013 4:21AM
Also, the defect occurs only when I'm watching the DVD on the TV screen, on my computer it's all right, so I guess my computer speed isn't the blame
Daedalum
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Posted Sat Mar 2, 2013 4:27AM
shivers, do you mean it could almost be 2 frames at once all the time? as that sounds like fielding is round the wrong way, which you can change in your edit. try changing it to see what happens
benjikat
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Posted Sun Mar 3, 2013 7:35AM
My guess is that the stock clips are progressive, whereas the rest is interlaced.
vesperstock
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Posted Sun Mar 3, 2013 11:44AM
Were the clips you purchased encoded as Photo JPEG or Motion JPEG?
jamesbenet
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Posted Sun Mar 3, 2013 10:13PM

Looks to be repeating frames due to progressive vs interlaced.  A way to fix it would be to re-encode the problem clips to interlace Motion JPEG format.
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