Author Topic: Canon EOS M  (Read 828142 times)

jacquaviva

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Re: Canon EOS M
« Reply #1875 on: January 13, 2019, 01:32:42 PM »
@12georgiadis

Here is my setup, E mount ring screwed (lucky that two holes fit), plastic ring with electronic contact for lenses removed to make some space for the filter. Just used two small plastic pieces, glued them and screw the filter on them.





Just to mention, when removing plastic and lens contact ring, you can't take pictures anymore (Err 20) you just can use movie mode.

henricusmaria

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Re: Canon EOS M
« Reply #1876 on: January 13, 2019, 02:52:32 PM »
Thanks for feedback guys.

@henricusmaria
12bit is better and very close to 14bit in quality. 10bit will work most of the time imo.

Thanks Danne.
I will do some tests in 12 bit and 14 bit. Is there a difference in image quality between the movie crop mode and the x5 zoom mode? The crop in the movie crop mode is workable, the 5x zoom is a bit much for me.

optical-work

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Re: Canon EOS M
« Reply #1877 on: January 13, 2019, 03:00:05 PM »
For more accurate shutter speed, set shutter range under crop mode sub menu to "full range" and use "high jello" or "low light" under fps override sub menu for mv1080 (exact fps looks okay with 2.5k). I thought change of shutter speed, when you change preset, is related to the sensor area that is scanned. Isn't it true?

12georgiadis

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Re: Canon EOS M
« Reply #1878 on: January 13, 2019, 06:22:18 PM »
@12georgiadis

Here is my setup, E mount ring screwed (lucky that two holes fit), plastic ring with electronic contact for lenses removed to make some space for the filter. Just used two small plastic pieces, glued them and screw the filter on them.





Just to mention, when removing plastic and lens contact ring, you can't take pictures anymore (Err 20) you just can use movie mode.

Thank you ! I think I prefer to adapt my 7D-vaf to 100D than to damage/restrict Eos-m usage but in the same time, I'm happy that with some Diy adjustment it works well !

loknar

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Re: Canon EOS M
« Reply #1879 on: January 14, 2019, 03:25:08 PM »
@danne So i took 1x3 mode for a spin, but now i face kinda problem with processing, i used dual iso and would like to get 1704x72X output, but when i export it from MLVApp i get 5120x2184 files, i wasn't able to find any place where there is this setting, in MLVApp there's normaltransofrmation: Width 1.0x, Height 0.33x, in file metadata there's 1704x2184, so where the 3x1704X2184 comes from?
Other than that it works excellent and i think i'll have some nice shots once i solve export (right now, only think i can do, is to force resolution back down during export, but that seems as bad solution)

masc

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Re: Canon EOS M
« Reply #1880 on: January 14, 2019, 03:32:42 PM »
@danne So i took 1x3 mode for a spin, but now i face kinda problem with processing, i used dual iso and would like to get 1704x72X output, but when i export it from MLVApp i get 5120x2184 files, i wasn't able to find any place where there is this setting, in MLVApp there's normaltransofrmation: Width 1.0x, Height 0.33x, in file metadata there's 1704x2184, so where the 3x1704X2184 comes from?
Other than that it works excellent and i think i'll have some nice shots once i solve export (right now, only think i can do, is to force resolution back down during export, but that seems as bad solution)
0.33x height stretch is now updated (v1.4+) : it will do what you describe: width = width * 3; height = height. We did that to have maximum resolution. If you want to have it smaller, you could use resize function from export settings dialog (ffmpeg export only).
5D2.212 | EOSM.202

loknar

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Re: Canon EOS M
« Reply #1881 on: January 14, 2019, 03:52:34 PM »
Thank you for reply, but wouldn't be better to include multiplication in drop-down dialogue? This is a bit counterintuitive and also in my case slower, first upscale, then downscale, and i also kinda fear of introducing some artifacts created from interpolation (and there's lot of them in upscaled frame).

masc

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Re: Canon EOS M
« Reply #1882 on: January 14, 2019, 04:02:17 PM »
Thank you for reply, but wouldn't be better to include multiplication in drop-down dialogue? This is a bit counterintuitive and also in my case slower, first upscale, then downscale, and i also kinda fear of introducing some artifacts created from interpolation (and there's lot of them in upscaled frame).
It is not really counterintuitive: no matter which factor is selected, it is always stretched to a bigger size. Only 0.33 became smaller before and behaves the same now. Rescaling speed is identical, if you override it with the smaller resolution, because resizing is done just once. It also won't introduce any artefacts. You just loose 66.6% of quality when downsampling.
5D2.212 | EOSM.202

Danne

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Re: Canon EOS M
« Reply #1883 on: January 14, 2019, 04:02:21 PM »
There´s no interpolation when upsampling @loknar.
Could be an option to manually set the sampling downward instead but I think default should be upsampled like it is now. However, with more options comes more confusion  :P

loknar

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Re: Canon EOS M
« Reply #1884 on: January 14, 2019, 04:05:09 PM »
OK, thank you both, i'm going to do the exports.

loknar

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Re: Canon EOS M
« Reply #1885 on: January 14, 2019, 04:07:59 PM »
Also, I don't know what beasts of a computer you have, but mine isn't built for processing 24 of 11Mpx frames per second  :o.

masc

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Re: Canon EOS M
« Reply #1886 on: January 14, 2019, 04:15:36 PM »
Also, I don't know what beasts of a computer you have, but mine isn't built for processing 24 of 11Mpx frames per second  :o.
...9 years old Core2Duo... LOL. When we introduced we thought: downscaling is never an issue, but upscaling (after quality is lost) is. So, if the resolution is to big, feel free to reduce it.
5D2.212 | EOSM.202

loknar

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Re: Canon EOS M
« Reply #1887 on: January 14, 2019, 04:40:40 PM »
You are clearly very patient :).
I agree with you in general, but in this case X axis is interpolated, so no information lost if no interpolation is done, Y axis is reduced, but given that i'm using dual iso, which (if i remember correctly) decreases vertical resolution by half. So yes, i'm losing some information (33 % on one axis?), but not that much and i'm not quite sure what to do with it anyway.

Danne

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Re: Canon EOS M
« Reply #1888 on: January 14, 2019, 05:03:40 PM »
New version:
https://www.magiclantern.fm/forum/index.php?topic=9741.msg208959#msg208959

I focused on getting rid of corrupted images in 1x3 binning mode. And also to complete a set up that will record all the presets continuously when a certain set up is performed. To enable continuous recordings do following:
sd_uhs hack on
bitrate to 10bit
ratios set to 2.35:1
(will scale down or reduce bitrate depending on preset chosen)

For instance. 1x3 1736x2150 will be set to 1504x1920 when ratios 2.35:1 is set. Still a stellar file since upsampled in Mlv App you will export a file that´s 4512x1920 in size.
3k will run with reduced fps and so will 5k setting. Most other presets will still keep original frame rate. All presets will record with 2.35:1.
If you want full manual control just skip the 2.35:1 ratios setting and do whatever tweaks in other menus instead.

Enjoy and don´t forget to post what´s working or not…








bergamote

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Re: Canon EOS M
« Reply #1889 on: January 14, 2019, 06:39:40 PM »
Oh boy this is exciting! This afternoon I managed to get a bit more than 200 frames in the 1x3 mode at 10bit/20fps and came to the conclusion this is the best image quality (without mad crop). Now a new build with a way to do continuous 1x3!!! Man, you rock! Trying this stray away.

Danne

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Re: Canon EOS M
« Reply #1890 on: January 14, 2019, 06:47:36 PM »
Go nuts  :P
Yes, it´s madness getting this out of the 1st gen eosm cam. 4.5k 24 fps...

jacquaviva

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Re: Canon EOS M
« Reply #1891 on: January 14, 2019, 10:46:35 PM »
Hello, do you think something can be done for non squeezed real time preview shooting at 1736x1120px ? Thanks a lot

Teamsleepkid

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Re: Canon EOS M
« Reply #1892 on: January 14, 2019, 11:30:35 PM »
im not getting continuous recording with 10 bit 2:35 1504 sd hack setting only like 2 seconds and crash. does it work for anyone else? also not complaining. thanks so much danne when are you turning blue? :P
EOS M

bergamote

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Re: Canon EOS M
« Reply #1893 on: January 15, 2019, 12:44:36 AM »
im not getting continuous recording with 10 bit 2:35 1504 sd hack setting only like 2 seconds and crash.

You mean in 1x3 right? Cos here it seems to work, I shot for a minute (but got 4 bad frames).

henricusmaria

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Re: Canon EOS M
« Reply #1894 on: January 15, 2019, 04:26:02 AM »
im not getting continuous recording with 10 bit 2:35 1504 sd hack setting only like 2 seconds and crash. does it work for anyone else?

Same here, it crashes within 2 sec. It works with the bitrate in 'Cropmode' at 12 bit and the data format in 'Raw Video' set to 14-bit lossless. Then I end up with a 10-bit lossless file.

henricusmaria

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Re: Canon EOS M
« Reply #1895 on: January 15, 2019, 08:09:01 AM »
How does the upsampling work in mlvapp? I now adjust the height stretch to 1.0x and then multiply the width by 3 in the export settings. Is this the correct way? And is it right that we end up with a 10-bit lossless file in mlv app? Thanks

bergamote

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Re: Canon EOS M
« Reply #1896 on: January 15, 2019, 12:27:52 PM »
Last night I could get continuous (at 1x3 1504x1920 10bit 24fps, with a handful of corrupted frames) but I was a bit underexposed the whole time.
Trying again in the sunshine, it crashes after just over 15s when I'm exposing to the right or slightly overexposed.
To test this, I started a shot underexposed and it rolled without problems for over a minute. Then pointed at the sky (to be massively overexposed) and it crashed within 200 frames.
Maybe I'm jumping to conclusions here, might just be a coincidence.

Danne

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Re: Canon EOS M
« Reply #1897 on: January 15, 2019, 12:35:50 PM »
That's how lossless works. More highlights, more overhead...

IDA_ML

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Re: Canon EOS M
« Reply #1898 on: January 15, 2019, 01:46:27 PM »
Bergamote,

The reason for the early stop phenomenon that you observe is that bright portions of the scene do not losslessly compress so well as darker ones.  Therefore, the brighter your scene is, the less is the compression and buffer fills much faster causing the camera to stop early.  When you move the camera during filming, watch for the color of the time indicator.  It should be green but when the sky or a brightly lit object enters the screen, it turns yellow, orange and red.  If it turns red, recording will stop any moment.

To avoid this, do the following:

1) AETTR your scene and once you are sure you have proper exposure, dial it one stop back

2) Focus precisely on the main object that you need to place the accent on

3) Activate Dual ISO and select the higher value to be two stops higher than the lower one as selected in 1), e.g. 100/400.  This will compensate for the lower signal-to-noise ratio in the shadows as a result of the reduced exposure in 1)

4) Start filming.  Now the scene will not contain too bright areas and compression will work just fine.  You will get continuous recording.  As a bonus, you will also get a brighter striped preview which will help you frame better.  But watch for the icon color.  If a large and very bright object enters the scene, it still may turn red and you may not have enough time to avoid camera early stop.

5) Process your files with MLVApp and enjoy stunning video quality !!!

6) And don't forget to thank the developers for this miracle! 

bergamote

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Re: Canon EOS M
« Reply #1899 on: January 15, 2019, 03:38:37 PM »
Right right right, that figures, cheers for the explanations guys!
Gonna follow those instructions and try dual iso now.