Anamorphic Cinemascope in Native 1920x810 MJPEG Mode
- Thread starter Lpowell
- Start date
If I understand correctly, the big deal with this patch isn't actually the anamorphic benefit, but the fact that we can use all this resolution in mjpeg for real. It doesnt allow you to shoot 1080p, but the upscale (or adapter correction) from 810 to 1080 is pretty painless. The anamorphic effect is just a bonus (though really only if you have an adapter).
Thanks for posting your results, irfan. I'm not sure what to make of the interlace artifacts in the image on the left. Since the MJPEG source file contains progressive frames that are not interlaced at all, the "Best" Deinterlace setting shown in your FCP Inspector screenshot should not be required.
Could you retry the transcode process once more? It should use no deinterlace and no motion compensation. The only upsampling that should be done is a vertical stretch from 810 to 1080 pixels at the best quality setting.
ninetto
Active member
Irfan's double de-interlace
Irfan's double de-interlace
LPowell is right on this one: By de-interlacing progressive footage you have effectively HALFED your horizontal resolution, that is what you are seeing with those rather crude scan lines.
I have seen similar artifacts when media-players are set up wrong and interpret progressive material as interlaced, also resulting in double-de-interlace, very ugly indeed!
Rather than using compressor you might want to try Mpeg Streamclip: I find it faster and easier to handle than compressor and it has an excellent scaling alogarithm to boot. That is all we have to do with this hack: scale it to 1920.
Irfan's double de-interlace
LPowell is right on this one: By de-interlacing progressive footage you have effectively HALFED your horizontal resolution, that is what you are seeing with those rather crude scan lines.
I have seen similar artifacts when media-players are set up wrong and interpret progressive material as interlaced, also resulting in double-de-interlace, very ugly indeed!
Rather than using compressor you might want to try Mpeg Streamclip: I find it faster and easier to handle than compressor and it has an excellent scaling alogarithm to boot. That is all we have to do with this hack: scale it to 1920.
miltonjackson
New member
Yes, Thank you. I saw you posts before, but are you sure this is the good result:
(I hope it is right because I´m getting same looking video right from the GH1 as you can see here in the preview in Vegas.)
There is still something in my mind that is telling me that I should get the 1,333 squeezed image from GH1 like on the 35mm prints to get the post-production anamorphic image.. now I´m lookin like a ass but hey.. everyone should help each other..
Hey Marek! Is it working with you now? I have Sony Vegas myself, and the output is allways half the screen black bars :/
But in File details it says 1920x1080. greetings
Hi!
Well.. I was busy last week .. So I don´ t know atm.. + I´m not at home and I don´ t have a GH1 here ..
I'll be buying a anamorphic lens now..
I managed this anamorphic patch working good with Adobe AE (there is a tutorial how to do it in AE in this thread)
My goal was to get true 2.37:1 without anamorphic adapter in post-p. ... I can get nice 1920x1080 after un-strech to 16:9 in AE CS5 now .. And that´ s it... Nothing more nothig less..
I've read as many of the posts about anamorphic patches as I could, and still wonder : if you have no anamorphic adapter to use it with, should you not just need to change the pixel aspect ratio instead of upscaling resolution in order to get the proper anamorphic look ? (I mean it's supposed to be an already "full" anamorphic resolution squeezed on a 4:3 aspect ratio sensor)
Yes, but it´s not .. the output GH13 picture is not squeezed in 4:3 aspect ratio .. If I got squeezed 4:3 image then I just need to change the pixel aspect ratio to get proper anamorphic look ..
EDIT: Just upload here one frame directly from the GH1's raw footage with this patch (no adapter)..
Image is of course not squeezed in 1.333 aspect ratio..
The benefit of this patch is to get better 1080 image then post upscale from 720.. But still dont know about the *cinemascope* aspect r.
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If I got it right, this patch enables people with a GF 1 and without an anamorphic adapter to crop a 1920 x 1080 frame (upscaled vertically from native 810) and get a 2.37:1 aspect ratio. The benefit being losing less information than when cropping the native isomorphic 1280 x 720 frame to 1280 x 540 (GF 1 standard 720p mode).
Am I right ? But, then the native 1920 x 810 (anamorphic patch) has to look vertically squeezed for this to work, right ?
Am I right ? But, then the native 1920 x 810 (anamorphic patch) has to look vertically squeezed for this to work, right ?
miltonjackson
New member
Hi!
Well.. I was busy last week .. So I don´ t know atm.. + I´m not at home and I don´ t have a GH1 here ..
I'll be buying a anamorphic lens now..
I managed this anamorphic patch working good with Adobe AE (there is a tutorial how to do it in AE in this thread)
My goal was to get true 2.37:1 without anamorphic adapter in post-p. ... I can get nice 1920x1080 after un-strech to 16:9 in AE CS5 now .. And that´ s it... Nothing more nothig less..
Sorry to steal youre time, but can u link me to that tutorial. Maybe i am very bling but i have read that Thread 2 times now and cant find what i am looking for
Exactly!!! But I can't get vertically squeezed image from GH1 ..
lpowell's tutorial in AE:Sorry to steal youre time, but can u link me to that tutorial. Maybe i am very bling but i have read that Thread 2 times now and cant find what i am looking for
I use Adobe After Effects for this purpose, others familiar with Final Cut Pro may want to comment on what works best for them. After Effects provides an "Interpret Footage" dialog for each clip you import into a project. Here you can set the clip's pixel aspect ratio to automatically handle anamorphic footage with 1.33x, 1.5x, or 2x squeeze factors. Once this factor is set, you can drag the clip into a Composition and it will be expanded to the correct aspect ratio and centered in the Composition's video frame. With a 1920-pixel-wide Composition, 1.33x anamorphic footage will fit perfectly in the frame, while 1.5x and 2x footage will stretch beyond the frame's vertical borders. This is often convenient, as it gives you an opportunity to center the image in a 1.5x or 2x clip as you like, and also eliminates any residual vignetting at the corners of the footage.
Once my editing and compositing in After Effects is complete, I simply render the Composition to the target format and the footage is automatically cropped to the size of the Composition's video frame.
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http://thaidfilm.com/mode.php?m=o&q=photos&space=1&u=612&a=view&pid=298
Hi MarekV,
I believe the native 1920 x 810 patch will caused the GH13 output to be stretched horizontally by 1.33X. That is why we need to attach the 1.33x anamorphic lens in front of the camera lens ,in oder to counteract the squeezing effect. Then ,we will have the GH13 output of 1920x810 in correct perspective.
The picture I got from the 1920x810 patch, comparing second one without the anamophiclens attached and the first one with the 2X anamorphic attachment. Please be noted that my 2x anamorphic lens vertically over-squeezing the image by 1.5X (or 2.0/1.33).
Hi MarekV,
I believe the native 1920 x 810 patch will caused the GH13 output to be stretched horizontally by 1.33X. That is why we need to attach the 1.33x anamorphic lens in front of the camera lens ,in oder to counteract the squeezing effect. Then ,we will have the GH13 output of 1920x810 in correct perspective.
The picture I got from the 1920x810 patch, comparing second one without the anamophiclens attached and the first one with the 2X anamorphic attachment. Please be noted that my 2x anamorphic lens vertically over-squeezing the image by 1.5X (or 2.0/1.33).
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miltonjackson
New member
Marek!
Thx for pasting the Tut!
I have tried but i am not used to AE.
I have done it now with Sony Vegas, and the result is in my eyes fantastic
Found out, just right click on footage in the timeline ->properties
and unclick "keep aspect ratio". and there you have a very nice 60mbit 1920x1080
greetings
Awesome! Now, we have a nice 1920x1080 image with Sony Vegas .. If we have a anamorphic adapter we will have a nice cinemasope image.. So in conclusion, if you need cinemasope image with this patch you really need a adapter .. - no way without it ..And the result is in my eyes fantastic
miltonjackson
New member
Here 1 testsamples which i uploaded
to both Vimeo and Youtube. Was renderd with 10mbits so
Quality isn´t that great, but u can get the idea of it working
http://www.youtube.com/watch?v=bB6D6U_sGQ4
http://vimeo.com/16151454
to both Vimeo and Youtube. Was renderd with 10mbits so
Quality isn´t that great, but u can get the idea of it working
http://www.youtube.com/watch?v=bB6D6U_sGQ4
http://vimeo.com/16151454
After advanced testing I figure out that those interlace artifacts are produced by Compressor (default settings from 810 > 1080). As u said footage from Anamorphic patch doesnt need to be deinterlaced and Compressor didnt help me with that since it needs Frame control option for correct strech (maybe there is another solution with Compressor but I didnt find it). So I turn for other tools with progressive transcode. So far best and simpliest is Final cut pro with Anamorphic 16:9 setting (Instructions are bellow). And after FCP I wanted to see results with other tools and I made comparison between different transcode tools. Here is video showing results (sorry for Vegas users). As I noticed FCP gives lower contrast result and all other tool give pretty same quality results. At the end of video there is also comparison between Anamorphic 1920x1080 and upscaled AVCHD 720p. All is filmed in Smooth Film mode with Contrast and Noise reduction -2.
Anamorphic transcode test: http://vimeo.com/16168891
Anamorphic transcode in Final Cut:
1. Import all your Anamorphic 1920x810 footage in Final Cut
2. Make new Sequence with settings
Frame size: 1920x1080, Aspect ratio: (Custom 16x9)
Pixel aspect ration: Square
Field dominance: none
Editing databese: 30
Anamorphic 16:9 checked
3. Drop your footage to timeline
5. Pop up "Do you want to change sequence settings to match clip settings?" Select NO
6. Again go to Sequence setting (cmd+0) and uncheck box for Anamorphic 16:9
And thats it! Your footage is automatically optimized to 1920x1080 and ready for editing.
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Wow! Thank you very much for this comparison! .. AE and FCP won this small battle I think ..
Well by cropping the upscaled 1920x1080 to 1920x810 you might be losing 270 lines of vertical resolution from the native isomorphic frame (eg 25% as compared to correcting the stretch with an anamorphic lens), but it's still 810-540 = 270 lines more than the vertical resolution of a 2.37:1 cropped 1280x720 frame (eg 50%). That and the fact that you're still using the full 1920 lines of horizontal resolution which is another 50 % more than the 1280x540 frame. So I believe, but I might be wrong, that cropping the 1920x1080 frame is still night and day vs a cropped 1280x720, and is a pretty big step closer to the true widescreen cinemascope you'd get with an anamorphic adapter (though of course you can't beat the extra information it squeezes on each side of the frame, + 33 % right ?).
I agree with you but with FCP you save a lot of time.
It would help me if someone knows another way of showing details so we can see real difference between shoots.
Think that mine are not so convenient.