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Messages - rob_6

***Is there a shutter speed limitation in x5 crop mode when shooting 3k? If I am at 1/1250th for example in HD non-crop mode and then I go into crop mode then the shutter speed will say 1/110 and it gets really bright. Is there a limit on how high the shutter speed can go in crop mode? I searched, but couldn't find the answer. Thanks!

***UPDATE: I was having this issue in the March 10th build. In the latest build I can use any shutter speed I want.
Quote from: dfort on April 22, 2018, 11:46:32 PM
The build is still on my downloads page. Look for the one labeled:

I don't like linking directly to the file because the link will break when the file is updated.

Thanks dfort!

Where did you get the December 1st, 2017 experimental build? Is it still online? I didn't see it on dfort's download page. Your footage shot with that build looks amazing!


Quote from: IDA_ML on April 22, 2018, 01:12:22 PM
A few days ago, I decided to check again the 5x magnification mode of the old and still my favorite 7D at its maximum 2520x1200 resolution at 10 bits uncompressed.  Here is a short video shot with the December 1-st, 2017 experimental build ("the haunting one") which allows Life View operation for proper subject tracking:

As you see, this old camera can provide ML RAW video with superb quality in terms of fine detail, dynamic range, transition smoothness, etc.  Due to its extremely fast interface, (mine writes at 110 MB/s) and unprecedented battery life, reliability and stability, it still could rival the 5D3 for serious work only at a fraction of its cost.  Used 7D-s in a mint condition can now be obtained at about 300 Euros in Europe.

Dfort put an enormous effort in trying to get the 7D working at 10 and 12 bits uncompressed and even achieved a remarkable success with resolving the "earthquake" issue.  Unfortunately, without much help from the other developers, he could not get very far.  I hope, the above video will encourage Dfort, Nikfreak, A1ex and other developers to continue their efforts towards porting 4K crop recording to the 7D and hope, there will be soon a new experimental build to test on this fantastic camera.
Quote from: dfort on March 08, 2018, 10:36:08 PM
@rob_6 - Yes, that's the tutorial.

Thanks or the detailed response. I really appreciate it! :)


Quote from: dfort on March 08, 2018, 05:31:12 PM
The tutorials take maybe 15 minutes to complete.

I am willing to help out with compiling. Couple questions. You mentioned it takes 15 minutes to complete tutorials for compiling, which tutorials are your referring to? Is it compiling on a PC? I have a Mac. I saw your thread about compiling on a Mac ( Is that a method that would work for the 7D?

Lastly, could let me know your ideas that I could test when compiling for the 7D? I basically want to start off in the right direction. :)


Quote from: IDA_ML on February 09, 2018, 12:48:04 PM

A very brief feedback from first tests with your build:


Following your instructions, I managed to upload and activate the mlv_lite, mlv_rec and mlv_play modules.  I tested RAW video recording with the MLV_REC module.  And it works - both in the normal uncropped mode at 1736x972 and the 5x-magnification mode at 2496x1198 resolutions. The Preview at 5x-crop is broken and screen freezes when recording starts.  If the RAW_twk module is also activated, the already recorded clips can be played back in the camera.  If an attempt is made to record in the presence of that RAW_twk module, the recorded 1736x976 video has again earthquake shaking.

My overall impression is that in the MLV_rec module, this build works in the same way as the "miracle" December 11-th build.  This is VERY GOOD NEWS since it proves that the 7D is capable of working without earthquake shaking !!!  It also appears to provide quite stable operation in both - the normal uncropped and the 5x-magnification modes at 10 and 12 bits which is EXCELLENT NEWS !!! If you could fix the freezing screen issue at 5x-magnification, this build will be perfectly useable !  Please keep up the good work, Dfort !


Would you mind sharing the instructions that you said dfort gave you when using the new firmware: raw_video_10bit_12bit_LVState-wip.2018Feb04.7D203

I tried based on what you mentioned in your post, but I must be missing something. I am getting earthquake shaking in about half of the clips I tested even though I didn't have the RAW_twk model activated. I am testing out 10 bit with the standard resolution of 1736x972 and the 5x-magnification mode at 2496x1198 resolution. Just wanted to make sure I had all the settings right that dfort gave your for this build.



Thanks for the updates on sounds syncing A1ex and everyone that helped! I have done a few tests. It looks like it is much closer to sync now, but it seems to me that the audio track is 2 frames early. I need to manually adjust each audio track 2 frames forward to get it right on. I am using 113 firmware with crop record 3.5k enabled with sound. I am also using MLVFS for processing. Anyone else getting the same result?

I hope this helps. Let me know if there is something else I can test to help narrow down the offset.


Quote from: SanchYESS on February 14, 2018, 04:26:18 PM
Audio records a bit extra before first and after last frame (which is may be helpful), I use mlv_dump, import video and audio into Resolve separately then sync manually. A bit longer but fine by me.


When you sync manually the clips in resolve are they all synced at the same point for any clip length? For example do you just slide the audio back 10 frames for each clip? Or is it a different point for each clip?

Hopefully its the same offset so we can use one of the mov converters that can offset the audio...


I see that you have already done some testing with your 7D and the build that you are working on. Is there any additional testing you might need? I am happy to help if needed. :)


Quote from: domo94 on November 23, 2017, 10:03:03 PM
I bought the VAF Filter for my 7d.
I'm slacking- haven't used it much, but I can pump out some examples for you if you'd like to see it!


I would love to see some tests you have ewiht your VAF filter. I would especially like to see some static shots with and without the filter so I can see the difference in RAW recording if you get the chance! Thanks!

Quote from: a1ex on November 18, 2017, 03:06:22 PM
Not sure what might be causing the issue, but mlv_rec's file I/O backend is pretty different from mlv_lite's; maybe g3gg0 has some ideas.

There is work in progress for making mlv_lite compatible with mlv_snd.

Yeah, that would be great if g3gg0 has any ideas. :)

Thanks again for helping me debug the issue. :)

Quote from: Walter Schulz on November 18, 2017, 03:29:10 PM
Are there 2 beeps when "Stopped" appears?

Hi Walter,

I don't hear any beeps when I use mlv_rec. I don't even get any beeps when I start recording either. The Beep, test tones in the Audio tab of ML has it set to on but they don't beep when start, stop, or even freezing of recording happens.

Let me know if there is another way I can test that for you or if there is a way to enable those beeps.


Quote from: a1ex on November 17, 2017, 09:11:38 PM
To narrow down, you can run a couple of tests: with a card formatted in the camera, record as much as you can, with:
- mlv_rec with sound (your current configuration that fails)
- mlv_rec without sound
- mlv_lite
- raw_rec (with some older version), only if the above did not work
- custom code that writes something to a file over and over (minimal example), only if the above did not work

Also, how does the crash look like? (e.g. can you film the camera screen during the crash?)


Great idea on the tests to narrow it down. Here are the results for the tests and an interesting finding!

- mlv_rec with sound (your current configuration that fails) - Fails at 200 gb approximately 48 minutes (1728x972)
- mlv_rec without sound - Same as above... Fails at 200 gb approximately 48 minutes at (1728x972)
- mlv_lite - DOES NOT FAIL. I can record for the amount of space on the card at 256gb and about 60 minutes at (1728x972)

So I guess there has been something introduced in mlv_rec that causes it to stop at 200gb? Do you have any ideas of what it could be?

Another solution would be to add sound to mlv_lite. Is there a module that can be loaded to allow sound to work with mlv_lite?

Per your request, here is a video of how it stops when recording mlv_rec like your requested. A few seconds into the video you will see the timer stop and the word "Stopped" appear behind the recording icon. The image doesn't freeze but the magic lantern menu is frozen as you can see near the end of the video:

I am interested to hear what you think. :)


Hi Dfort,

Thanks for your response. Sorry, yes, it is a 256gb card that I am recording to. And once I restart the camera after it stops at 200gb I can record the remaining 56gb on the card. When I download the card the card is full at 256gb. :)

Its strange because I can film a take that is 30gb of space and then try to record another take and let it go as long as it can and the camera will stop recording once it hits 170gb. So it stops once it hits a total of 200gb. What I have been doing is just powering off the camera before I record a second long take so I can record at least 200gb. It just seems like there is something that is keeping it from recording more that 200gb. I was just hoping its an easy fix. :) Which I am sure is never really the case. 

Thanks again for your response! Do you have any ideas of what may be causing this?

I have been using my 7D to record long takes for events that I film in MLV RAW with Sound at 1728x724. I can record for about 65 minutes for that resolution which is around 200-205 gb of space. I have discovered that it doesn't matter what resolution I record, it always stops when the card fills up to 200 gb of space. The gui freezes and I have to restart the camera and pull the battery to be able to record for the remaining time. Does anyone know why this happens? Is there a way to fix it to fill the entire card?

EDIT - When recording to a 256 gb compact flash card.

I appreciate all your hard work on this forum! Excellent job! I am following this thread closely and am ready to test with my 7D whenever its ready!

Thanks again!

Modules Development / Re: MLV Lite
October 23, 2017, 06:11:37 PM

Awesome! Is this intended to possibly work in 12 bit lossless and 3k mode? If so, I am happy to test it out. Thanks!


Check out this video created by hjfilmspeed! It was a huge help for me! Thanks again hjfilmspeed!


Quote from: hjfilmspeed on May 13, 2017, 08:31:59 PM
@whysodifficult @rob_6
This video is not for those new to ML. Try this at your own risk. I am not responsible for any damage this video may bring if your camera explodes or bricks. Magic Lantern is not responsible either. It will probably just brick not explode though.
Magic Lantern 3072 2.35:1 12 bit Lossless RAW Recording from the CROP_REC_4K build from 4-29-2017
Once you have ML installed and the correct build on your SD card, this video should help you set up your 5DIII to record 3K almost continuously depending on the scene. Remember ML on SD and Rec to CF.
Remember this build is experimental and not for those that are new to ML. Try at your own risk.

If they added sound to this build I would probably buy another 5D! Image quality is incredible! Sound is my only wish. So that's 2 of us out of 5000! :)
Just wanted to let you guys know that I have been recording without any crashing for quite some time with the latest build. I am using the settings recommended in hjfilmspeed's video at 3k 2.35 and it works so well! I am using a 256GB Lexar 1066x compact flash card and can record about 44-46 minutes  in 12 bit 3k reliably and it even closes the file once the card is full without crashing! Amazing work A1ex and everyone else that helped make this possible. I literally feel like I have a new camera! The only thing to be careful of is the compression and not letting the camera overexpose which seems to stop the recording due to the increased recording bitrate.

I have one question. As we know, if I half press the shutter while in the 5x crop mode it zooms in and allows me to focus with a normal live view playback. I usually half press the shutter before hitting the record button to get the focus right. But, I have been successful pressing the shutter half way while recording to get focus during the recording, too. Does pressing the shutter half way while recording put extra work on the camera which could cause the recording to stop early? So far, it seems to work fine. Just curious if anyone else has tried this technique or has any insight!

Thanks again to all!


Amazing! Thank you so much for the tutorial video. Everything makes sense now! So seriously cool you made this for us! I love magic lantern! You guys are all awesome!

Quote from: hjfilmspeed on May 12, 2017, 06:30:50 PM
@whysodifficult I am currently making a video tutorial for 3k if you can give me to the end of the day


Really looking forward to your video tutorial! Thanks so much in advance!
Quote from: lostfeliz on April 30, 2017, 08:00:53 AM
Because the preview in 3k and above is so laggy, I hadn't thought of plugging in my monitor to it. But tonight I tried it out. The field of view is about 40% of what's on camera screen and being recorded. But it's great for focusing and no lag. If you can get used to operating with two monitors (one for composition and one for focus), you can really shoot a 3k project with a 5diii. Hell, if you hades  a focus puller you'd be in even better shape.

The HDMI monitor output (when mirroring, at least) is completely centered. Short of being the correct frame without jaggy lag, I'm wondering if the HDMI mirrored output could be panned as desired to frame what you want to see to keep in focus.

The cropped panning control knob does something when you use it but the screen then pop back to how they were.

Thanks for posting this info! Just curious. Are you using 1.2.3 firmware or 1.1.3? Thanks!
I have a 128GB 1066x card which I use to record MLV Raw plus audio. I am able to record until the card fills up in one take when I set EXFAT mode enabled in Magic Lantern firmware. If I were to purchase a 256GB Card would that fill up the card on one take without stopping for any reason? I just wanted to check before I purchase one. Anyone have any experience with this?


I added the issue in Bitbucket in case anyone has the time to address this issue.

Thanks again!