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Diabolo.ca Forums => Videos => Technical => Topic started by: martijn on August 18, 2007, 10:27:19 PM

Title: Problems exporting PAL DV Widescreen
Post by: martijn on August 18, 2007, 10:27:19 PM
Hi guys, I received my new Sony HDR-SR7 today (yay!) and recorded some stuff in HQ SD in widescreen (16:9) mode today. However, if I want to render my project in Sony Vegas 7.0e (which has the proper PAL DV Widescreen setting [the preview screen seems just fine]) as a PAL DV Widescreen avi-file, it doesn't come out widescreen. Somewhere in that process it screws up the aspect-ratio and changes it from 16:9 to 5:4 (that's the aspect-ratio that VLC and WMC display)... Now, I can ofcourse change the aspect-ratio and deinterlace in VLC, but I don't want to do that. I wanna have a proper uncompressed avi file with the correct aspect-ratio, so I can deinterlace and compress in Virtualdub.

Any thoughts on the matter? Things I can try? Help is greatly appreciated, because I'd like to be able to film and edit in widescreen :)
Title: Re: Problems exporting PAL DV Widescreen
Post by: martijn on August 20, 2007, 01:01:06 AM
Ok... perhaps I should provide more details.

It looks like VLC doesn't read the 16:9 DAR flag of the exported file (I know it's there after opening it in Gspot (http://www.headbands.com/gspot)) and it displays the video in it's SAR (= 5:4). The weird thing however, is when opening the original widescreen mpeg-2 or the exported DV avi file in Gspot, it gives me a PAR of 1,422 (~10:7), while the PAR for PAL DV Widescreen is 1,4568. That's weird, isn't it? This is also the case for my captured 4:3 DV avi files. Gspot tells me the PAR is 1,067 (16:15), while the PAR for PAL DV is 1,0926. Could this be the reason why VLC doesn't play back my exported DV avi files in their DAR? If so, how to fix it?

If that's not the reason, what could be? any thoughts? I tried my best to explain this very carefully and I've been close to losing my mind on the matter... I mean, this topic has had 30 views and I know we've got a few video experts here on the forum, so please have a look and reply if you think you're one of those experts ;) (by the way, thanks for your help so far Matt! at least it got me understanding the problem a bit more)


SAR = Storage Aspect Ratio (which is 5:4 [1,25] because the resolution of PAL movies is 720x576)
PAR = Pixel Aspect Ratio (which is 1,4568 for PAL DV Widescreen and 1,0926 for PAL DV)
DAR = Display Aspect Ratio (which is 16:9 [1,78] for PAL DV Widescreen and 4:3 [1,33] for PAL DV)
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