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Adtg_gui module didn't support 7d so I've asked Audionut to compile a working build to run tests with. I'm interested in this as well, I found a little bug that lets us record normal aspect 48 fps mlv that doesn't need stretching in post, so between that and dual iso video, 7d would be a raw beast.

Camera-specific Development / Re: Canon 7D
« on: April 05, 2015, 10:40:54 PM »
1728x692 48 fps slow mo. But wait a minute... When I play it back, the footage is normal aspect, no stretching required! I'm kinda running on no sleep in 2 days, I need someone to confirm this ASAP. I noticed when I set the cam to 1280x720 60p, and set the fps override to 23.976 exact fps, the liveview display was stretched vertically, so when recording it and playing it back records it in normal aspect! Timer A under 23.976 exact is 422 (FT -76). So I set the fps to 48, and Timer A back to 422. Mlv settings-
GD Off
Canon preview
256 MB warmup
Hacks on
4 buffers
Reserve on
Global Draw off
Expo override on

Rokinon 35mm manual cine lens

After messing with it a little bit more, the black and white levels get all wacky sometimes and the exposure is super glitchy. At first, I noticed this while testing out different settings in 640x480 mode, going to do some more tests soon as I charge my battery.

:edit: Yeah definitely a bug in the fps override control. I just downloaded the latest nightly, same thing. How exactly does fps override cause LV to stretch? Or is this a new feature I completely missed?!

:edit2: Ok, just figured out that this bug has been in the nightly since 7d fps override was implemented.

:edit3: To fix this issue, Timer A needs to be set to 498 (FT +76) for 23.976 exact and 440 (FT +10) for 60 exact.

General Development / Re: Linux on your Canon DSLR? Why not?
« on: April 03, 2015, 03:03:44 PM »
Since we can access the bootloader now and control what boots up on the camera, can we control WHERE it boots from? Say if I have a CF with 2 partitions and would like to be able to select which partition I boot from, is this possible now? Also, will we be able to boot from and use ex-fat formatted cards in cameras that don't originally support them (7d, 50d)?

Feature Requests / Re: [ALREADY DONE] Greyscale Preview
« on: April 03, 2015, 02:55:50 PM »
Yeah you have to disable Global Draw in one of the presets for Greyscale to not show up. Your request is to be able to toggle Greyscale on and off while keeping all other display items the same, correct? Half pressing the shutter displays the ML Color preview instead of Canon preview.

Are you on a Mac? Open a terminal window, drag and drop cr2hdr into it, then drag your dual iso cr2 into the window and press enter.

Camera Emergency Department / Re: Scary 7d bricked
« on: April 03, 2015, 08:19:56 AM »
Use a picture-hosting site like imgur or postimage and upload it, then get the direct link to the image and post it here with the [img] code.

Feature Requests / Re: Greyscale Preview
« on: April 03, 2015, 04:01:12 AM »
I had the same request a while back, and I found that a good solution is to set up 2 liveview display presets, one with Greyscale on and the other with Canon preview on. Switch back and forth with the info button (or whatever the instructions say for your model). Works nicely in 5x when trying to frame a shot at higher resolutions.

Done. Previews don't load until you click "Load" (or unless you click on a specific MLV file).
Awesome, thank you. Got a shoot next weekend 5 hours away from home, having a fast, stable and reliable program like MLVFS is a lifesaver. Much appreciated.

Duplicate Questions / Re: Magic Lantern RAW - Bad quality
« on: March 20, 2015, 03:32:47 PM »
Ahh I see, you're shooting in 50 or 60 fps, right? Try 25 or 30 fps mode, I'm not familiar with EOS M but that should give you a raw file that doesn't need to be stretched.

Duplicate Questions / Re: Magic Lantern RAW - Bad quality
« on: March 20, 2015, 03:04:27 PM »
Looks like a combination of chromatic aberration and soft detail from the kit lens with insufficient post-processing. Shoot mlv instead of raw so ACR has more metadata to work with, and try only applying basic edits in ACR (WB, Exposure and lens correction for all that CA). Import the cdng's straight into After Effects as a Camera Raw sequence, no reason to convert to tiff. And try doing your denoise/unsharp very last ;)

Found a major issue right after installing. When importing dng's into After Effects that have been converted from mlv's, After Effects detects the file format as QuickTime, thereby preventing one from importing as a camera raw image sequence and adjusting the footage with Adobe Camera Raw. Also, importing an mlv straight into After Effects works, but the debayering is very poor. Are there work-arounds for these issues?

Shoot Preparation / Re: 7d FPN and iso 6400
« on: March 20, 2015, 05:05:36 AM »
I found that on another forum, I thought it sounded a bit too interesting. I'll pm you, I broke my compiler somehow, the files seem to build ok but the camera won't boot with the autoexec from my machine.

I ran a dark frame mlv through mlv_dump with
Code: [Select]
$ mlv_dump -a -o dark.mlv <input mlv> but it was only 16 frames, and opening it with mlvfs produced one dng with no noise or stripes, so I'm assuming I need more frames and to save it to dng instead of another mlv.

Just found the actual step-by-step here.

Worked like a charm, thanks for the hint! Here are the mlv_dump commands-

Code: [Select]
# sum up all frames of the darkframe.MLV and write single frame into the averaged output
mlv_dump -o avg.mlv -a <darkframe.MLV>

# process into a dng, optional
mlv_dump --dng avg.MLV

# process fpn mlv into a clean mlv by subtracting the frame in avg.mlv from every single fpn frame
mlv_dump -o clean.mlv -s avg.mlv <fpn.MLV>

Hi All

  There is a new QuickTime component that support MLV and RAW available for 99$.  It works with the Adobe suite and any other QuickTime enabled software.  If you want to try it, you can download it from


Awesome, been looking for a product like this for quite some time. Needing a different media player for every format is a royal pain, especially with raw and prores files. I'll give the demo a shot, I'm definitely interested to see how well it runs.

Shoot Preparation / Re: 7d FPN and iso 6400
« on: March 19, 2015, 06:30:02 PM »
Found an interesting explanation for the vertical banding on the 7d-

Another source of banding is the ADC. There are potentially two culprits here. In the case of a camera like the 7D, which uses split parallel readout (where four readout channels are directed to one DIGIC 4 chip and another four are directed to another DIGIC 4 chip in an interleaved fashion), a fairly pronounced but even vertical banding can occur, even in the midtones, thanks to different response of the DIGIC DSP image processors that house four ADC units each. As even bands are sent to one DIGIC's ADC units, and odd bands are sent to the other DICIC's ADC units, 100% identical processing is unlikely, and slight differences manifest as vertical bands.

The final potential source is high frequency components. High frequency logic has a tendency to be noisy. Using the 7D again as an example, it is an 18 megapixel sensor, which a grand total of eight ADC units must process, at a speed fast enough to support an 8fps shutter rate. (Technically speaking, the 7D has even more than 18 million is actually a 19.1 megapixel sensor, as Canon always masks off a border of pixels for bias offset and black point calibration.) At 8fps, total pixels processed per second must be at least 152,800,000, and since there are eight ADC units, each unit must process 19.1 million pixels each and every second. That requires a higher frequency, which can (via a variety of mechanisms I won't go into here) introduce additional noise.

Shoot Preparation / Re: 7d FPN and iso 6400
« on: March 19, 2015, 12:06:43 PM »
No problem, it seemed like way more stripes than usual, I may have had auto lighting optimizer or high iso nr on by accident. I'll have to test and see if I can duplicate it and figure out.

I had the same idea, you only need one frame for each video but it must match the settings of it (same resolution, iso, tv, av, etc.) so the option to select a specific dark frame for each would be nice. I believe dark frame subtraction works best before debayering so this would probably be even more helpful, maybe one of the gurus can chime in and add their knowledge.

Shoot Preparation / Re: 7d FPN and iso 6400
« on: March 19, 2015, 04:22:40 AM »
Good read, thanks. I've found that dark frame subtraction right in AE takes care of most, sometimes all of these stripes. I had some pretty nasty clips from a video shoot in a dark club last month, so that combined with shooting in 50p (1728x516) on the 7d and having to scale the footage even more had me worried that the footage would be unusable. I used MLVFS to convert the footage, with only bad pixel fix and vertical stripe fix selected. Even those options didn't touch this noise. 
I recorded another 50p clip, same exact settings but with the fps override set to 2 with the lens cap on. I used the VisionLog dcp on both clips, did some slight NR on the original and matched the dark frame setting to it, except with no NR. Then added it to a layer above the original footage, blend mode on subtract and opacity ~40-60%. That took care of most of the stripes, and Neat Video fixed the rest, with hardly any loss in quality and sharpness. Sharpening the low luma frequencies in Neat Video helps to make underexposed footage look nicer without that digital harshness as well, I've found.
Kind of cumbersome and time-consuming but it works in a pinch, and a little bit of grain and contrast smooths everything over nicely.

Raw Video Postprocessing / Re: The CinemaDNG Discussion (raw2cdng)
« on: March 18, 2015, 10:37:27 PM »
Pulled out the old pc so I could try out this app, great work chmee! I definitely like the jpg proxy feature. Now I just need to get Windows XP to read these damn dng files.

Cool thanks for the type up. I got the terminal bin to compile and run just fine, but I wanted to get the hang of building the complete package and try to see what may be causing the mlv's, and moreso the raw files, to hang when trying to export. One issue seemed to be with MLRV crashing when trying to convert files with insufficient exif data or no audio (I.e. Raw files) as well as OpenGL crashing when using gpu-based processing. But that takes a less busy mind than mine lol.

I downloaded the source a while back and did some messing around with the code but couldn't get it to compile (Mavericks 10.9.5), probably need to get virtualenv and my pkg builder configured correctly. Iirc there's a .sh script in the bitbucket repo that compiles the installer, just have to know where to point it for the tools.
I'd love to see development continue on MLRV, I honestly can't imagine shooting MLV without it. Soon as I have spare time I'll see if I can debug my compiler.

Any way to add an option to webgui to disable gif previews? It's not too bad when there are less than 50 GB of MLV's to preview, but working with 100+ GB of MLV's and a not-so-powerful gpu can slow things down pretty significantly.

Getting crazy vertical stripes and green tint occasionally with  the latest mac mlvfs. Doesn't happen all the time and not every mlv either, seems to happen when I first log on and mount my folder. Ejecting the drive, closing my browser and re-mounting it seems to fix it. Toggling vertical stripe correction and bad pixel fix doesn't fix it. Going to try to replicate the issue and see if its random or if certain mlv's and settings cause it.

I think dmilligan knows how to compile cr2hdr as well  ;)

Beat me to it lol.

Ohhh I don't have any hdr's to test. Care to upload one?

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