I have made a few BD test projects with DVDit Pro HD and realised that it reverses the field order by mistake during the transcoding in PAL HD projects which results in slight jitter of the footage during playback and a thin green line on the bottom of the screen.
The green line is probably not visible on most HDTV's as they are 16:9 and do slightly overscan. I have a monitor with 1200 lines of horizontal resolution and on playback the film plays with letterbox, where the green line is clearly visible at the bottom between the footage and the letterbox!
Have any of you had the same experience with the reversed field order or the green line?
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major transcoding clitch in DVDit Pro HD!
Started by
AquaPix
, Jan 07 2007 04:20 PM
4 replies to this topic
#2
SS Scott
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Digital Master
Posted 07 January 2007 - 04:52 PM
how do you know that the field order is reversed? What was your video source that was transcoded? Only time I have heard of the green line was with QT and switching versions of QT solved the issue.
#3
AquaPix
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Posted 08 January 2007 - 06:05 PM
Hi Scott,
you have guessed right, I am using QT7. I have placed the QT reference file into the media folder of DVDit Pro HD. When I click on the properties tab of the QT file it says that the source is upper field first and it should be lower, as I am using 1080i/50 (Pal) footage.
The weird thing is that if I put out the project as a normal DVD and let DVDit transcode there is no green line and no jitter on fast objects. It only happens if I output to BD.
As a matter of fact the DVD looks better than the BD!
The work around for me at the moment is to transcode the QT ref file with Sorenson. This way I get a reasonable .mpv file that I can import into DVDit. It has the right field order when I check on the properties tab of the file and DVDit doesn't need to transcode.
Sorenson is definitely not the best compression suite and I normally use Procoder2.
Here lies the next problem. Though the files that come out of Procoder are accepted in DVDit, it always transcodes it again which doesn't give me good results either.
I have bought DVDit Pro HD so I can create everything in HD, drop my QT ref file in it and to be able to output to DVD and Blue Ray.
At the moment this is not possible and I always have to create an SD and a HD project.
This s&%cks!!!
Do you know which version of QT I could try to remedy this situation?
I hope it is not a version prior to 7.x as I need 7 and above to run my Avid editing suite.
you have guessed right, I am using QT7. I have placed the QT reference file into the media folder of DVDit Pro HD. When I click on the properties tab of the QT file it says that the source is upper field first and it should be lower, as I am using 1080i/50 (Pal) footage.
The weird thing is that if I put out the project as a normal DVD and let DVDit transcode there is no green line and no jitter on fast objects. It only happens if I output to BD.
As a matter of fact the DVD looks better than the BD!
The work around for me at the moment is to transcode the QT ref file with Sorenson. This way I get a reasonable .mpv file that I can import into DVDit. It has the right field order when I check on the properties tab of the file and DVDit doesn't need to transcode.
Sorenson is definitely not the best compression suite and I normally use Procoder2.
Here lies the next problem. Though the files that come out of Procoder are accepted in DVDit, it always transcodes it again which doesn't give me good results either.
I have bought DVDit Pro HD so I can create everything in HD, drop my QT ref file in it and to be able to output to DVD and Blue Ray.
At the moment this is not possible and I always have to create an SD and a HD project.
This s&%cks!!!
Do you know which version of QT I could try to remedy this situation?
I hope it is not a version prior to 7.x as I need 7 and above to run my Avid editing suite.
#4
SS Scott
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Digital Master
Posted 08 January 2007 - 06:50 PM
so you are seeing the field order of the file you bring in as reversed...not the field order of the file that is created. interesting. couple of things:
1) in that properties tab, if you highlight the field order line, you can actually change it via a pulldown menu at the bottom
2) you should take a look in the temp folder after the file is transcoded and you should try to grab the transcoded video, copy it to your desktop (or whatever) and then import it into DVDit Pro HD and then check the field order of that...
3) check the forum boards. sheurdam has some Procoder 2 settings that create BD legal MPEG-2 that is not transcoded by DVDit Pro HD
As to the QT version...6.5 is what I was thinking. Really don't know the answer there. Maybe trying different code (BlueFish444, Blackmagic). Shooting from the hip here. not even sure if that is possible or would even help.
1) in that properties tab, if you highlight the field order line, you can actually change it via a pulldown menu at the bottom
2) you should take a look in the temp folder after the file is transcoded and you should try to grab the transcoded video, copy it to your desktop (or whatever) and then import it into DVDit Pro HD and then check the field order of that...
3) check the forum boards. sheurdam has some Procoder 2 settings that create BD legal MPEG-2 that is not transcoded by DVDit Pro HD
As to the QT version...6.5 is what I was thinking. Really don't know the answer there. Maybe trying different code (BlueFish444, Blackmagic). Shooting from the hip here. not even sure if that is possible or would even help.
#5
pixel
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Posted 09 January 2007 - 02:54 AM
AquaPix, on Jan 7 2007, 04:20 PM, said:
Have any of you had the same experience with the reversed field order or the green line?
I think its a problem of the PAL HDV. I have also seen this green line with an other encoder.
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