Canon DSLR Video (1080p) cleanup [Archive]

anton_foy

29th March 2010, 21:56

Hello I want to know if anyone have used any Canon 5D/7D -video footage through avisynth, cleaning up the image?
I noticed the quality is good but suffers from the H264 codec and brings artifacts that makes colour correction/grading harder.
Has anyone any thoughts or experience on how to make the video footage cleaner of the blotchyness of the compression?

Thanks

Guest

30th March 2010, 00:42

Post a link to an unprocessed source sample.

anton_foy

30th March 2010, 14:05

I dont know about any unprocessed footage Im trying to find some but here is two links with footage (scroll down to the video section):
http://www.robgalbraith.com/bins/multi_page.asp?cid=7-10042-10239-10240

and

http://www.imaging-resource.com/PRODS/E7D/E7DVIDEO.HTM I am on a slow comp now and cannot check the footage but in this site the artifacts are shown below the videos in screencaps.

Guest

30th March 2010, 14:26

I dont know about any unprocessed footage Huh? I meant just post a sample direct from the camera, without any filtering or other processing. The sample should illustrate the artifacts you are concerned about.

Your links do not tell me what artifacts you are trying to fix. I've no time to read very lengthy web pages and then try to read your mind!

anton_foy

30th March 2010, 15:59

As I wrote in my first post: "I want to know if anyone have used any Canon 5D/7D -video footage through avisynth, cleaning up the image?"

I do not own those cameras and that is why I ask this question, to know if anyone has been trying it out and cleaned up the image. Want to know if those cameras would have good enough quality after filtering.

So please do not try to read my mind when you only can read my post, it is alot easier.

Guest

30th March 2010, 16:59

Your first post did not say that you do not own the camera. So again mind reading was required.

Sorry for trying to help you. It won't happen again.

Ghitulescu

31st March 2010, 09:07

Some people, me included, try to document a bit about a gear they intend to buy, especially when it's an expensive one. I mean BEFORE buying it.

The OP should have clearly mention that s/he doesn't own one.

anton_foy

31st March 2010, 12:04

@Neuron2: there is no point for unintelligent rudeness, I was polite and I did not mention that I do not own the camera but this was NOT the question, so please I ask again.
Has anyone used any Canon 5D/7D -video footage through avisynth, cleaning up the image?

Could it be any clearer?

And since you only want to help by making trouble I suggest you learn new and better ways to help people. :)

Ghitulescu

31st March 2010, 12:29

The photo quality of 5/7D is very good, so I expect that would reflect also in that of the RAW videos. If any AVCHD issues are present, probably they would be corrected with a new FW update. 5/7D is oriented to the prosumer segment, so Canon will not afford to disappoint them. It's more an educated guess than a fact but I would count on it. I downloaded a bit of one of their videos and it seems to be better than many AVCHD camcorders around.

Guest

31st March 2010, 13:49

Could it be any clearer? Clear enough to issue you a rule 4 strike for attacking me personally.

anton_foy

31st March 2010, 14:17

@Ghitulescu: Thanks, yeah the video quality is very good in my opinion but I have seen examples of blockyness and somewhat smudged when there is many small details in the image. I guess that is because of the h264 compression that cannot handle too much detail all at once.
Would be very interesting to see if someone took some footage with movement and saturated colored objects too see how good it performs.
Even more interesting is to see if filtering through avisynth would "cover up" the flaws of the codec or if it only gets worse.

Blue_MiSfit

31st March 2010, 19:53

I have processed several pieces of 5dII footage, and I'm quite impressed, except when it comes to high motion. The "rolling shutter" artifacts are impossible to remove.

The bitrate used by its H.264 encoder is sufficient to preserve details most of the time, though it will occasionally block, and suffers from a lack of adaptive quant (i.e. subtle blocking on flat areas, like x264 used to ~2 years ago).

Some gentle filtering in AviSynth works wonders to clean up blocking, and massaging away chroma noise. It's a fantastic little camera, but by no means a professional HD video camera. Think of it as a free extra feature on an extremely competent full-frame still camera.

~MiSfit

anton_foy

2nd April 2010, 00:57

@Blue_MiSfit: That is very good to hear :)
I know about the rolling shutter problem, I have been working with the red one camera for three years now and we still get complaints. I can agree with them but when you buy a camera in this price range it is of course acceptable imho.
But what kind of filtering would you suggest? FFT3D or a deblocker?
I will try to get my hands on some footage and see if I can get some cleaning done ;)
Thanks again!

Blue_MiSfit

2nd April 2010, 01:13

I like MDegrain2 :)

Running this on an 8 core server with MT Avisynth nets ~4fps on typical settings when encoding to an H.264 mezzanine file.

That's just my own experience.

You can get much faster results with fft3dfilter/fft3dgpu, but MDegrain2 is truly wonderful

~MiSfit

anton_foy

2nd April 2010, 13:12

Thanks! A lot of testing ahead...

Soulhunter

6th April 2010, 09:54

Heh, got a 7d some months ago, videos are indeed impressive and far away from any "camcorder" I previously used!
One important thing are the right settings (there are many guides out there) also *points at the picture styles (http://www.cinema5d.com/viewtopic.php?f=14&t=3401)*

My usual postprocessing involves:

- MCTemporalDenoise (for low-light/high-iso situations)
- GradFunkMirror (gets rid of banding and slight blocking)
- Lanczosresize to 1280x720 (1080p -> 720p, read below*)

*Imo its 1080p footage doesn't hold much more details than 720p actually should...
*Downscaling to 720p doesn't kill much detail (do a comparison) but will hide/lower imperfections (noise or compression artifacts) and it also helps to get the files smaller!

dbzgundam

6th April 2010, 16:33

anton_foy

6th April 2010, 17:31

Thanks Soulhunter! Regarding the picture styles I used the Superflat2 which made a HUGE difference. Strong colors (especially the reds) seem to get blocky/jaggies but is that due to colorspace conversions afterwards or 4:2:0?
I tried one clip in avidemux: blocky reds
and the same in Vdub: reds were just fine

@dbzgundam Sad that the aliasing issues can't be solved though.
Do you mean the moiré pattern in fine details?

Soulhunter

6th April 2010, 22:15

Sad that the aliasing issues can't be solved though.
Yeah! Tho with 1080p->720p its less problematic than with direct 720p recording. Btw, I wonder if its just the AA filter (good for photos, too weak for "low resolution" 1080/720p video) or [also] the scaling/binning/line-skipping the camera does? If its just the AA filter, perhaps some day they produce cams with dual-auto-switching AA filters... >.>

Soulhunter

6th April 2010, 22:19

Strong colors (especially the reds) seem to get blocky/jaggies but is that due to colorspace conversions afterwards or 4:2:0?
I tried one clip in avidemux: blocky reds
and the same in Vdub: reds were just fine
Without a sample...
My bet is: -> Different chroma upsampling (http://forum.doom9.org/showthread.php?t=106111&highlight=chroma)!?

anton_foy

9th April 2010, 07:04

Yes it seems to be the chroma upsampling, thanks.
Maybe I will buy myself the new Canon EOS 550D, comparisons between the 7D and 550D shows the latter to have a better video quality.

So tired of Windows now I wish I could run Avisynth in Ubuntu.
HDDs and fans are making war-like noises :rolleyes:

Soulhunter

9th April 2010, 21:01

As far as I know the quality should be more or less identical...
Guess there's lots of placebo effect involved in the comparisons around the net ;)
Still, if you are just after the video capabilities and still-images-capabilities aren't that important, go for the 550d!