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DVD created with iDVD from Blackmagic 8bit timeline, picture tears with fast motion
We have been creating quick DVDs of spots with iDVD on our G5 systems using the Blackmagic SD card. All worked well until recently. The DVD plays back OK but the picture tears in blocks during movement scenes. This happens on two different systems. One has been upgraded to Tiger FCP 5, iDVD 5.01. The other is running Panther with FCP HD and iDVD 5.01. Both have the correct up to date BMD drivers. As I said the video is only one or two :30 spots.
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16 Replies
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Are you watching this on a computer screen? That’s normal due to interlacing. If you see this on an external monitor watching off a DVD player, then there’s a problem.
If the DVD is ONLY going to playback on computers, then you need to apply a De-Interlace filter to the video before you compress it.
Walter Biscardi, Jr.
Creative Genius, Biscardi Creative Media
https://www.biscardicreative.comNow in Production, “The Rough Cut,” https://www.theroughcutmovie.com
“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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No, I am watch a monitor fed from a DVD set-top player. This is a new problem. We have been using this method for a year or more.
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If it’s an issue on your external monitor, then I’m guessing your field order is reversed. Make sure the field order is lower field first on the MPEG-2 render for NTSC video.
Walter Biscardi, Jr.
Creative Genius, Biscardi Creative Media
https://www.biscardicreative.comNow in Production, “The Rough Cut,” https://www.theroughcutmovie.com
“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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Yes I have checked the field order. It doesn’t look like a field order problem. It is many lines at once tearing together. It looks like an encoding problem.
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It is the 486 lines of resolution being squeezed to 480 (this is my guess) I printed the program to DV via SDI and imported it back as DV and the problems went away. Hope this helps
Drew -
I think you are right but it used to just leave black bars at the top and bottom.
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I’ve had this problem too. I think that the problem started with the 5.01 upgrade because it used to work fine.
IDVD is squishing the picture vertically by about 30 lines. You can see a big black bar top and bottom. It’s not a 480/486 problem either it happens in both resolutions. It also happens with the Blackmagic codecs and photo jpeg codec and animation codec. DV footage works fine though.
All of the same files work ok in DVD studio pro.
-Sandy
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Same here. Happens randomly, and rampantly. iDVD5, QT6, FCP4.5.
THIS IS A BIG F***KING PROBLEM.
I asked a “genius” at the apple store lecturing about iDVD, but he had no idea.De-interlacing has been my quick fix answer
BUT THIS IS NOT A SOLUTION
De-interlacing greatly reduces the video quality -
[isoprophlex] ”
De-interlacing has been my quick fix answer
BUT THIS IS NOT A SOLUTION
De-interlacing greatly reduces the video quality”You could always move to DVD Studio Pro. Not a great solution if don’t want to spend the money, but exports from FCP as MPEG-2’s work fine here and DVD outputs via DVDSP work beautifully.
Walter Biscardi, Jr.
Creative Genius, Biscardi Creative Media
https://www.biscardicreative.comNow in Production, “The Rough Cut,” https://www.theroughcutmovie.com
“I reject your reality and substitute my own!” – Adam Savage, Mythbusters
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We also use DVD Studio Pro, but mainly for Reels. IDVD is perfect though for laying off rough cuts fast.
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