Messages

1

Raw Video Postprocessing / Re: How to correct multiple images in RAW therapee

« on: January 07, 2014, 03:33:22 AM »

On the Windows version, I just hit Ctrl-A to select all. I'm sure there's a similar command like that on Mac. Also, I hit Ctrl-V to "Paste" a profile I copied from a source.

2

Modules Development / Re: Magic Lantern (RAW) Video format v2.0 (mlv_rec.mo)

« on: December 30, 2013, 12:57:03 AM »

I've been playing with the MLV dump compression options and I have problems when using the -b parameter. When outputting files to DNG, the images are distorted in one form or another (I can't even recognize what's in the image). Most of the time it's all white with some random bits of noise. Tried playing around with different values, but with no luck. This parameter gives just a little more compression than without it, but even that's a nice thing to have. The files were recorded on a 5D2. All the other parameters (-e -l -z) appear to work fine in the short tests I've done.

edit: spoke a little too soon. There are a few artifacts coming from somewhere else, though not as severe.
edit2: Recompressed it and it looks fine now o_O I think having the MLV Player running while its compressing isn't a good idea XD Outputting the frames crashes after a while though.

3

HDR and Dual ISO Postprocessing / Re: Automatic color grading script for photos (uniform_exposure.py)

« on: July 16, 2013, 01:09:25 AM »

Easy, with that theory that almost nobody believed: ISO 1600 is less noisy than ISO 100.



Something along these lines: http://www.guillermoluijk.com/article/nonoise/index_en.htm

Dang, I wish I learned about this earlier  I've been dabbling with enfuse by pushing an image in different directions and merging them together and thought, "Damn, it's great that I can see lots of shadow+highlight detail in one exposure now, but man it's noisy in the shadows." Now I gotta grab some new footage while it's still day outside at a high ISO and play with it later. 

4

Raw Video / Re: Noise reduction. Do it in ACR or use Darkenergy/Neat Video?

« on: July 15, 2013, 06:18:32 PM »

Edit: oops, double post

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Raw Video / Re: Noise reduction. Do it in ACR or use Darkenergy/Neat Video?

« on: July 15, 2013, 06:17:55 PM »

Yeah, I prefer temporal denoising over spatial since it works kinda like multi-sampling for scanning pictures (you make more than 1 scan to cancel out the random noise that occurs). For video, previous and future frames to the same job. The only difference here is that video involves moving pictures so it's trickier. Good temporal denoisers are usually motion-compensated though. I use MVtools in Avisynth for that.

6

Post-processing Workflow / Re: Colors are not preserved after exporting tif's > video

« on: June 26, 2013, 09:33:25 PM »

I generally convert the RGB frames to the Rec. 709 Reference Display profile (http://www.color.org/rec709.xalter), import it to RGB24 video using Avisynth and finally convert it to the YV12 (4:2:0) space with Rec. 709 coefficients. For x264 encoding, you have to set a few flags to "bt709" for proper playback.

The most accurate colors I was able to reproduce (images look almost like they do in a color managed app like photoshop) was by using the MPC-HC video player with color management enabled and gamma set to 2.4. The gamma thing may be explained here: http://en.wikipedia.org/wiki/Rec._709#Transfer_characteristics

BTW, this was all guesswork and I have no clue if it's the right way to do things.

7

Raw Video / Re: Anti-Aliasing: Best Solution for Aliasing in Low Resolution RAW video Upscaling

« on: June 08, 2013, 12:48:36 PM »

I had good results with this back in the day.

If you're handy with avisynth, you can try changing the resizing algorithms in the script for better results.

Apply a good sharpener at the end of your script to break the laws of physics

Be prepared to significantly increase your processing time.  But hey, quality comes at a cost

I think I fooled around with some AVS AA filters for this kind of video, but I don't recall getting anything satisfactory at the end. I probably didn't use them correctly though. I wonder if an implementation of Nvidia's FXAA could do anything about it. It's a post-AA so it doesn't require real-time rendering to work. I searched for info about it a while ago on Doom9's forum with not much luck.

8

Raw Video / Re: 4gb limit Raw recording 5d2 (how to merge 2 files ?)

« on: June 05, 2013, 03:01:37 PM »

Hmmm, yeah I'm kinda stumped. Just updated to the latest build by a.d. (94190a95bbaf), recorded 6104 frames, merged them via the command line and now I'm currently extracting them. Both the raw2dng from the main ML bitbucket and the build from a.d. works. The a.d. build is more recent though and seems to do more with the vertical stripes correction (lots of the corrections are something other than 1.000).

9

Raw Video / Re: 4gb limit Raw recording 5d2 (how to merge 2 files ?)

« on: June 05, 2013, 04:14:04 AM »

Yeah, it may be a problem with the version of Raw2Dng. The command line you posted looks perfectly fine.

10

Raw Video / Re: 4gb limit Raw recording 5d2 (how to merge 2 files ?)

« on: June 04, 2013, 04:49:52 PM »

If you're using Windows, you can use the command line to merge the files without having to rename anything really. For Vista/7/8, hit the windows key to open up the search bar, type "cmd" (without quotes) and hit Enter to open up the command prompt.

Type the following to merge the files WITH quotes:

copy /b "C:\...\blah.RAW"+"C:\...\blah.R00"+"C:\...\blah.R01"+...+"C:\...\blah.RXX" "C:\...\blah-merged.RAW"

A couple slightly more advanced tips:

1) Open up a notepad file to type out the entire command first and then paste it into the command prompt. Press the windows key, type "notepad" and hit enter to open it up. Once you have everything written, hit Ctrl-A to select all the text, Ctrl-C to copy the text, then paste it into the command prompt window (AFAIK, you can only paste it by right-clicking the window and clicking "Paste").

2) You can quickly copy the path of each file by holding Shift and right-clicking on the file. A new option called "Copy as path" will appear. Click it and paste the path in notepad with Ctrl-V. It'll have quotes too.

edit: Oh, I forgot that some file extensions may be hidden by default and you may not see them unless you show them. The WinRAR files have the extension .R00, .R01, .R02, etc. The first file in the sequence is .RAW followed by .R00, .R01 etc.

11

Raw Video / Re: Raw video on 5DMK2

« on: May 29, 2013, 08:12:22 PM »

The file splitting implementation on the latest build corrupts frames after about 1600 or so, presumably where the split occurs.

Update: The latest build (from commit 9eaa84d...) by a.d. seems to have fixed the issue. I recorded till my 16 GB card maxed and it looks good all the way through.  Well, except for the last few dozen alternating frames, but it's always done that. Thank you!

12

General Development Discussion / Re: uncompressed 14-bit RAW video recording

« on: May 28, 2013, 09:02:51 PM »

Hm, I was not entirely following the 5D markII thread, what exactly is causing the write speed drop while using LV?

Just thought if LV mode is limiting the write speeds, maybe it will be also worth making a RAW video mode not involving the LV at all, for videos with static camera position that could mean a higher res possibilities.

I think a1ex implemented that at one point, but I don't think it made a difference in the end. No clue what's limiting the 5D2, maybe it's just the hardware limit, but we have been seeing gradual increases throughout the weeks. I've gained about +4-6 MB/s of write speed compared to when I first started playing with this, with the same card.

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Raw Video / Re: Raw video on 5DMK2

« on: May 28, 2013, 08:49:05 PM »

What kind of corruption?

Lots of pink noise on some sections, noise/discoloration and vertical lines in others. I'll get some examples up in a bit. Gotta re-join/extract the frames again.

14

Raw Video / Re: Raw video on 5DMK2

« on: May 28, 2013, 07:21:12 PM »

The file splitting implementation on the latest build corrupts frames after about 1600 or so, presumably where the split occurs. edit: oops, meant to post this in the 5D2 builds thread.

15

Raw Video / Re: 1920x1080 RAW - real resolution?

« on: May 28, 2013, 06:43:41 PM »

Can a video camera ever really resolve "true" 1080p? I recall there being a theorem (Nyquist something or other) that states that when converting things to digital, you need to acquire the source at twice the target resolution, then downscale it to maximize the quality at the desired resolution. This happens with things like flatbed scanners too. Scanning at 600 dpi looks worse than scanning at 1200 dpi and downscaling it to 600 dpi. Resizing algorithms can preserve the detail that was impossible to acquire at the native target resolution.

16

General Development Discussion / Re: uncompressed 14-bit RAW video recording

« on: May 28, 2013, 06:31:17 PM »

Can this be right? Transcend should be capable of around 100Mb/s? Has the card been through low level format using the Transcend format programm? I heard it may rise the write speed.

Though the 5D2 can't reach those numbers, this benchmark is still lower than what it's capable of. The highest values I've seen so far were in the high 60s, almost 70 MB/s. Heck, with this new build, my 600x Sandisk card can record at a stable 59.5+ MB/s. Even though it's just below the speed required, I can finally do 1880x800 continuously at least until my 16GB card fills up (love the huge buffer we have )

17

General Development Discussion / Re: uncompressed 14-bit RAW video recording

« on: May 28, 2013, 03:03:49 AM »

lol @ the pissing ape

Great video. It seems to be one of the few I've seen that haven't been mangled *after* being captured in post. Lots of high frequency detail preserved, particularly noticeable on the animal textures (fur/skin) and the girl's striped cap (your daughter I presume?) It really shows the difference between the 5D3 and 5D2 too, even though my jaw still constantly drops by how good the 5D2 looks in RAW.

18

General Development Discussion / Re: uncompressed 14-bit RAW video recording

« on: May 25, 2013, 09:49:01 PM »

Well, it's been about 2 weeks since I started fooling around with RAW and I'm still constantly amazed by the quality. My brain keeps telling me "this shady region should be clipped to pitch blackness so don't expect any details" but I still see everything and get surprised lol.

RAW is not just about the sheer quality and resolution increase either. I've been fooling around with other technical stuff, like IT8 targeting for increased color accuracy which is more flexible with RAW data. I still have a reflective target used for flatbed scanners. so it's not optimal and a hassle to avoid reflections. However, the results have been pretty darn good I think the colors are fairly representative with what i see with my eyes. I've also learned about color-managed video. All my frames are converted to Rec.709 (using this profile: http://www.color.org/rec709.xalter) instead of sRGB and encoded with the Rec.709 flags on in x264. Playback in MPC-HC with color management on makes everything look exactly as it should (at least, I think it does). Fun times with the new opportunities RAW gives us!

19

Raw Video / Re: Raw video on 5DMK2

« on: May 25, 2013, 04:28:49 PM »

I wanted to test how well this worked on the 5D2, and as others have reported 1880x840 is maximum. I am able to record from 200-360 frames @23.976fps, and then it stops.

So the 5D2 skips frames at 1880x840 even though the benchmark results are well above the write speed requirements? 69 MB/s should be plenty... Were you recording with global draw on at the time? If so, did you try recording without it?

Thanks for the results btw, I lets us 5D2 owners get an idea of what our limits are and what to look out for in terms of future upgrades.

20

Raw Video / Re: Another raw_rec.mo for 5D2 (bypass 4GB limit, deleting videos)

« on: May 25, 2013, 03:25:13 AM »

Very nice indeed! 1880x800 lasted almost 2200 frames and 5.37 GB on my Sandisk 16GB 600x card (averaged above 58 MB/s which is a little better than it was before). I haven't checked out the frames yet though. Great job and thanks!

Just recorded a 14.8 GB clip at (almost) the usual stable resolution, which maxed out the card. Gonna see how continuous recording looks, though it'll take a while lol.

21

Raw Video / Re: Raw video on 5DMK2

« on: May 22, 2013, 09:00:10 PM »

Just to clarify, full frame is 3:2 ratio and anamorphic is a 4:3 ratio (unstretched), right? You can record at something like 1440x1080 (the 5D2 can barely handle that) and stretch it to 2538x1080. That's well over that full HD can handle (1920x1080) so it even gives you a bit of room to downsample to 1920x817 or some mod2 resolution.

22

Raw Video / Re: Raw video on 5DMK2

« on: May 22, 2013, 08:33:07 PM »

Full frame video resolution is 1880x1250 for the 5D2. Kinda funky, but it was designed this way. Unless we can get 94+ MB/s of write speed, it's kind of a pipe dream to get full frame resolution continuously, which in turn would've provided even greater resolution at 2.35:1 with an anamorphic lens (effectively 2938x1250 resolution when stretched horizontally). I'd be happy enough with just ~1880x800 which the 5D2 seems just barely able to pull.

23

Raw Video / Re: Raw video on 5DMK2

« on: May 21, 2013, 11:05:42 AM »

For me, the audio loses sync continuously and maybe not even smoothly. It starts off close to sync, but gradually shifts out of sync. I don't know if it's the fault of the program I use (Avisynth with the ffms2 plugin), but audio remained in sync with the same program in the "vanilla" recording mode.

24

General Development Discussion / Re: uncompressed 14-bit RAW video recording

« on: May 19, 2013, 05:11:16 PM »

I was messing around with the audio + video recording and had trouble syncing it up. After a quick search, I found that this was a general issue with ML's audio recorder ever since it was introduced, and that 1% investigated it for a bit. I wonder what's going on here. Even if I adjust the sample rate to some arbitrary value to sync it up perfectly, I don't think it'll guarantee sync at other parts of the clip. Testing the video frame rate with a stopwatch showed that it stays smooth and steady. Is there some kind of syncing process that happens in real time for normal recording? That might be why recording with audio on cost such a huge amount of overhead versus recording it separately lol.

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Raw Video / Re: Raw video on 5DMK2

« on: May 18, 2013, 09:56:23 PM »

@Hazer: You are doing 1920x on the 5D2? 1880 is the maximum width on the 5D2. Are you using a 5D3?

Crop mode goes to 1920 and even higher. You can zoom in with the AF point selection button to record in that mode (at the upper right-hand corner, within thumb's reach). Also note that its stuck at ~30 fps unless you change it with FPS override.