T2i Common jagged issue with T2i/DSLrs or something wrong with video import?

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eifler922

New member
I'm new to shooting any kind of video and recently got a T2i. I shot some video from the Washington Auto show several weeks back and just had a chance to finally edit/upload it.

http://vimeo.com/20442338

I wanted to see if the issue I'm having is specific to how I am shooting the video/importing it into CS5 Pr Pro or if it is a camera issue. T2i is running the stock firmware and I shot the video in both 720p 60fps & 1080p 24fps (both double fps shutter speed)

A) Pan @ :47, when watching in full screen if you pause the video you can see jagged horizontal lines. I thought since I shot the vid in progressive and encoded it in progressive I wouldn't have this issue. Is this a camera/editing/encoding issue?

B) In the same pan is seems like the video is "tearing" or kinda jumping a bit, is this simply because I'm panning to quickly? Same thing during 2:32 and 2:44. I'm not sure if this is the way I'm shooting or because I'm running Mercalli to stabilize the image.

C) Flickering @ 2:05, is this a shutter speed problem? I usually run my shots at double shutter speed whatever the fps are at.

D) Are there any guides someone can recommend on editing workflow, specifically dealing with how to best work with and output T2i file format (.mov)? I feel I'm having issues simple throwing in all my native 720 and 1080 shots in a timeline, editing and output in mp4 with "vimeo" settings.
 
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Yeah I see the artifacts....WEIRD. It looks like interlacing which should not be there on a progressive video. It has to have been introduced in the post workflow somewhere since this is not one of the issues with Canon DLSRs. They don't shoot interlaced video so it's not like you could accidentally be in the wrong mode like with other cameras....the rest of the video looks good though. I'd double check the timeline you're dropping the video into and/or exporting out of.

I can say for sure those artifacts are NOT a camera issue...that's the good thing. Someone with CS5 should be able to tell you the best settings....good luck!
 
Did you drop it straight on the timeline to edit or are you using an intermediary codec?

Oh, wait, I didn't see the Native video dropped on timeline bit... hrmm
 
Perfectly normal for these cams. 1080 will produce far less aliasing and moire than 720. If you have to pan, do it very, very slowly.
 
colin rowe said:
Perfectly normal for these cams. 1080 will produce far less aliasing and moire than 720. If you have to pan, do it very, very slowly.
Click to expand...

If you look at the video all the way through the artifacts he is talking about are NOT aliasing and moire....it looks exactly like good old interlacing. I agree to pan slowly but I've never seen these lines on progressive video - something is up with the post workflow.
 
I will look at the original footage later today and post up a comparison between post workflow and what was shot.

When dropping it into the timeline is it critical that I use the one that the video was shot in? I remember reading somewhere that if you drag the videos into the project explorer Pr Pro automatically detects the type of video and at that point you can simply drag the video into the time line.

Should I be creating two separate timelines, one for everything shot in 720/60fps and one for 1080/24 fps? When I eventually place the files into my final timeline should I always use the lowest common denominator scene (in this case 720/60fps) or how would it work?

I should note that when I imported the footage into Pr Pro I used a settings for the project called Canon XRF or Canon something else (don't have Pr in front of me) instead of the dSLR 720 or 1080 modes as I've seen recommended. I don't know why this would cause the issue. Another thing that occurred is on most of my 1080p shots I had to manually go into all the footage edits and change the Motion effect from 100 size to 68.5 because all my 1080 shots were zoomed in.

So definitely think there is something wrong occurring with my workflow/import I'm just not sure where :D

edit: screen cap of interlaced looking footage, http://grab.by/9cOx
 
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So I realized the issue I was having was due to an obscure Mercalli setting. When I disabled the stabilization the interlacing disappeared. I guess I never thought of this since it only occurred during panning shots which I've never done with stabilization. For some reason Mercalli cannot detect the type of video on certain files and is not running a correct setting.

img339.imageshack.us/​img339/​8936/​optionf.jpg

I switched the video-format over to no fields progressive scan and it worked perfectly.

Thanks for all your help. From an overall perspective, what do you do with multiple 720 1080p shots in one timeline? Do you usually separate them into different compositions out or just avoid that all together by always shooting one type?
 
Glad you figured it out! A lot of people use 720 with 1080, 720 60 for slow motion and then the rest of the shoot 1080, so you're not alone there.
 
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