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Messages - byrd

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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 05, 2022, 06:08:25 PM »
[EDIT - fixed] it turns out it was just a problem with the RAW black level (thanks to masc for the help!). I used the repair black level in MLVapp and it was fine.

Hi. I'm looking for a bit of help recovering some files after I may have done something silly. I just tried to record a 2hr timelapse using intervalometer and silent picture, in video mode. It produced an MLV file that's 4.29gb and three files with the same name ending in .M00 (4.29gb) .M01 (4.29gb) and .M02 (1.1gb). The MLV file opens in mlvapp and is fine but seems to be only the green channel, so I am wondering (hoping) the other files contain the red and blue channels? But I don't seem able to open them. Here are my settings:

Video mode
1080p preset
raw video on, 1736x976
Ratio OFF
bit depth OFF
set 25fps off

Intervalometer ON, 2s
Silent picture SIMPLE, MLV

I know it says this works better in photo mode, but I had better luck with doing it in video mode on a test earlier, with intervalometer set to 4s. The only thing I changed this time was setting intervalometer to 2s and that made everything green.

Thanks very much in advance for your help!

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Hi it's me again with my tiny lenses... Was having a play today with a Schneider Kreuznach machine vision lens with a very small image circle and found it vignetting slightly off center in 2.5k 2520x1418 preset with ratio set to off and resolution in the raw tab cranked up to 2520x1416. Not a biggie but I wondered if there are some CMOS values I could play with to nudge the framing to the left a tiny bit? Here's a pic of current vignette:


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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 04, 2021, 03:27:15 PM »
Thank YOU!

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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 04, 2021, 03:15:35 PM »
CMOS 7 at 325 is perfect. I tried to save as custom mode but it didn't remember. Do I have to reset CMOS 7 each time I want to use this preset?

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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 04, 2021, 02:13:45 PM »
You can adjust cmos 7 from the sub menu. Start by setting it to 2a0 and start from there.

OK I can go as far as 2a2 and it helps! But if I go further I get a white bar at the bottom, in both framing view and in the actual video. It seems like 2a5 is where I want to be for the top corners.

EDIT: actually at 2a2 there are two rows of white pixels at the bottom and one row of magenta

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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 04, 2021, 12:39:21 PM »
Should get you 24fps and 1136x2280. Couldn´t spot any focus pixels in this preset but if you find any please tell and I add a pixel map.
Only works without corrupted frames with preview set to LV frozen and this gives you framing preview. This is done automatically. No real time preview.

This is AMAZING, thank you so much! Just tried and it works perfectly, recorded 1 minute at 14bit with no corruption. Not seeing any focus pixels either. It's perfect with my normal eos m lenses. Tried it again with Kiev 16u Vega 20mm to see what sensor coverage was like (in case it made that lens more usable with this mode) and horizontally it's centred but vertically it looks like the framing might be a bit higher than centred?

https://ibb.co/m4Nx6fW

I can't believe I'm whining when you've done such an awesome thing in less than 24h... It's not a complaint! Just had a look through posts from 2blackbar in Nov 2019 about adjusting framing in crop mode but it was over my head. Is it easyish to shift the whole framing down like 400 pixels or so? (that's just a guess)

Thank you again

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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 03, 2021, 03:20:05 PM »
Of course in 5k ana frtp, the 1360x1976 and 1280x2160 are very similar amounts of data, so if there was a way to access 1140x2280 that would be wonderful!

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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 03, 2021, 02:54:50 PM »
I can´t come closer than maybe around 2280 in height.

Those extra 100 pixels would still be helpful!

Need more info regrding resolution. Not sure what you are asking for. Could you write out the resolutions?

Sorry was unclear. This was a separate question, just trying to understand the difference between the presets.

In "5k anamorphic" preset with ratio set to off, resolution can go up to 1736x3256 (1736x2928 in the case of 16:9 aspect ratio) but only at 14p. Obvs if I turn ratio on to 16:9 I get 24p but then I can't select resolution above 1104x1864 in raw menu.

In "5k anamorphic flv" as you know I can get up to 1736x2930 at 18p if ratio and set 25p are both on, but in this preset there seems to be no way to get 24p.

But then if I choose "5k anamorphic frtp" with ratio off the max resolution I get is 1360x1976 but when I turn ratio on to 16:9 the resolution goes up to 1280x2160 at 24p.

So my second question was one of curiosity rather than request for feature. When I was exploring and trying to see if there was any way to use 1x3 binning with a 3:2 ratio to get higher than 1088x2160 resolution, I was testing out the limits of each of these three 5k ana presets and noticed the "5k anamorphic" preset had a lower max resolution than the "5k anamorphic frtp" at 16:9 and I just wanted to understand why.

What's got me confused is that in the 2.5k modes, setting ratio in movie menu seems to cap resolution at whatever is safe and continuous, but if I turn ration off, I can push resolution higher in raw tab. But in 5k ana frtp it seems to be the opposite?

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crop_rec and derived builds / Re: Danne's crop_rec_4k experiments for EOS M
« on: February 03, 2021, 01:39:41 PM »
Thanks for the amazing new build, Danne! The longer record times in 2.5k 2520x1418 preset are amazing; really maximizing the coverage with c-mount lenses.

I have a question about resolution in the anamorphic presets. I feel like a saw a post ages ago about getting a bit more vertical resolution at the expense of horizontal but I can't find it anymore, so apologies for going over old ground:

I am shooting in 3:2 and so was wondering if there was some setting I could tweak to get like 1168x2334 at 24p, which if I understand correctly is slightly less data than the beautifully functioning 1280x2160 at 16:9? For my application I don't need frtp or real-time preview, just framing.

Also, I think I might be doing something wrong, but the max resolution I can get at 24p in the 5k anamorphic preset is lower than in the 5k anamorphic frtp preset. Am I missing a trick with ratio in the movie menu, or set 25fps or similar?

Thanks in advance to anyone who can help!

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Raw Video Postprocessing / Re: Powergrade for Resolve
« on: September 10, 2020, 05:02:36 PM »
Thanks wib! I'm often shooting in 1080 mode on the EOS M, so aliasing is also a danger for me and I kind of found the same as you describe, probably because of the better debayering and upscaling in MLVApp? I'm also just using the free version of Resolve, so the superscaling function isn't available.

However, I asked this question in the MLV RAW on EOS M facebook group yesterday too and Markus Schweitzer, one of the developers of MLVApp, pointed out that this practice will reduce the bit depth to 10bit, so that by doing so I'm actually losing a lot of information, and that LOG especially needs high bitdepth for the midtones. So he said it could result in banding. 

I guess I need to do more tests to see how the advantages and disadvantages play out in my own work. Markus's point was that it's better to do all the RAW processing and color correction in the same place, so either Resolve or MLVApp.

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Raw Video Postprocessing / Re: Powergrade for Resolve
« on: September 09, 2020, 07:13:36 PM »
Hi guys, thank you for this fascinating and helpful discussion! I have also been impressed by the grading tutorials from Juan Melara as well as yourselves, and I wanted to ask a related workflow question: Has anyone compared the results between this method starting with DNGs and doing everything in Resolve with exporting ProRes from MLVapp using the Alexa Log C profile?

I'm totally convinced by grading in Arri Log C, but the reason I ask is because I was reading over on the MLV RAW on EOS M facebook group that MLVapp has much better debayering and upscaling capabilities than Resolve. So I've done a few comparisons and to my not very well trained eye, it seems like exporting ProRes 422 HQ in a log profile from MLVapp does yield slightly better results, especially if you're upscaling a lot. And of course it makes for smoother playback in Resolve than working with CinemaDNG, which is nice if you're editing in Resolve too before grading.

Curious to hear your thoughts!

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