Canon 50D

[a1ex]

"hg bisect" is what you can do to help.

You only need not to be afraid of the command line - it works on all major operating systems.

[justinbacle]

I'll try and do that. Never used hg_bisect but doesn't seem that difficult. I already have magic lantern build set in bash fo windows

[justinbacle]

I got :
user@domain:~/magic-lantern$ hg bisect
abort: cannot bisect (no known bad revisions)
Not sure it helps  Am I missing something ?

[a1ex]

You need to mark the last changeset as bad and the older one as good:
https://stackoverflow.com/questions/3534107/what-is-mercurial-bisect-good-for
http://hgbook.red-bean.com/read/finding-and-fixing-mistakes.html

e.g.

Code Select Expand


hg up unified -C
hg bisect --reset
hg bisect --bad
hg up older_changeset -C
hg bisect --good


Then, it's best to recompile both ML and the affected module(s); "make zip" from platform/50D.109 should be fine.

[justinbacle]

I'm pretty sure the problems happens at or after changeset 443884d (used on build 2017Aug17).
I'll have to compile versions in between the ones available for download right ?
As I still have trouble compiling myself, I cannot go further :s

make zip ends in :

Code Select Expand


boot-hack.o: In function `my_init_task':
boot-hack.c:(.text+0x230): undefined reference to `_bss_end'
boot-hack.c:(.text+0x234): undefined reference to `_text_start'
boot-hack.o: In function `my_task_dispatch_hook':
boot-hack.c:(.text+0x378): undefined reference to `_task_overrides_start'
boot-hack.c:(.text+0x37c): undefined reference to `_task_overrides_end'
boot-hack.o: In function `copy_and_restart':
boot-hack.c:(.text+0x560): undefined reference to `_bss_start'
boot-hack.c:(.text+0x564): undefined reference to `_bss_end'
boot-hack.c:(.text+0x57c): undefined reference to `_bss_end'
boot-hack.o: In function `my_big_init_task':
boot-hack.c:(.text+0x67c): undefined reference to `_init_funcs_start'
boot-hack.c:(.text+0x680): undefined reference to `_init_funcs_end'
boot-hack.c:(.text+0x690): undefined reference to `_tasks_start'
boot-hack.c:(.text+0x694): undefined reference to `_tasks_end'
config.o: In function `get_config_var_struct':
config.c:(.text+0x258): undefined reference to `_config_vars_start'
config.c:(.text+0x25c): undefined reference to `_config_vars_end'
config.o: In function `config_var_lookup':
config.c:(.text+0x290): undefined reference to `_config_vars_start'
config.c:(.text+0x294): undefined reference to `_config_vars_end'
config.o: In function `config_save_file':
config.c:(.text+0x8e4): undefined reference to `_config_vars_start'
config.c:(.text+0x8f8): undefined reference to `_config_vars_end'
config.o: In function `config_parse_file':
config.c:(.text+0xaa0): undefined reference to `_config_vars_start'
config.c:(.text+0xaa4): undefined reference to `_config_vars_end'
property.o: In function `prop_add_internal_handlers':
property.c:(.text+0x1a4): undefined reference to `_prop_handlers_start'
property.c:(.text+0x1a8): undefined reference to `_prop_handlers_end'
module.o: In function `_module_load_all':
module.c:(.text+0xeb4): undefined reference to `_module_symbols_start'
module.c:(.text+0xeb8): undefined reference to `_module_symbols_end'
make: *** [magiclantern] Error 1


Anyone got the same problem on the 50D here ?

[justinbacle]

mlv_rec is working again in the latest build Sorry I couldn't help pinpoint the reason why it broke on august builds :s

[a1ex]

The only change in the latest build was in the silent picture module (nothing changed on mlv_rec or ML core). You can check the previous build again - maybe something changed in your settings meanwhile?

The above error should disappear with "make clean" - not sure why it happens though.

[justinbacle]

Thank you a1ex, make clean helped compiling There's still a few errors but it compiles now !
I can start hunting now. I'll do it this week-end or as soon as I have a few hours free.

[anto]

guys, what is the max continuous resolution of 50D? there is crop mode? any hope for the future (lossless, 10 bit ecc)?
I'm 5DIII owner and just thought to sell my cam to swicth to another cheaper ML cam.

[justinbacle]

guys, what is the max continuous resolution of 50D? there is crop mode? any hope for the future (lossless, 10 bit ecc)?
I'm 5DIII owner and just thought to sell my cam to swicth to another cheaper ML cam.

Yes you have crop mode. You can do full frame continuous (1584x1056).
Check the calculator http://rawcalculator.bitballoon.com/calculator_desktop to check the maximum resolution in crop mode for your wanted aspect ratio   (2.35:1 1920x818 is ok)
Compared to your 5D3, you'll be loosing 10-12bit raw and compressed raw (plus the 50D is not that stable if you want to record a lot in warm environments)

[SoyLeo]

Experimenting with my new 50D, hahahaha ... the image quality is incredible. 

https://vimeo.com/248726534

[kyrobb]

I'd say you'd be losing a lot if you sold your 5D3 for a 50D. You'd lose proper HD raw recording, 4K crop mode, good noise performance at higher isos, sound recording, and you'd gain aliasing and moire issues in their place. 2/10 would not recommend.

[cohap_zp]

Hey Guys!

Does anybody have an issue while recording RAW video on 50d - video recording stops and says "card file system error"?
For me it is appears randomly at any moment and I havent find the solution.
h.264 works perfectly.

CF card Im using is Toshiba Exceria 1000x 32GB.

Thanks.

[SoyLeo]

Hey Guys!

Does anybody have an issue while recording RAW video on 50d - video recording stops and says "card file system error"?
For me it is appears randomly at any moment and I havent find the solution.
h.264 works perfectly.

CF card Im using is Toshiba Exceria 1000x 32GB.

Thanks.

I think I had this error during a 4 hour session recording a maximum of 5 continuous minutes (videoclip).
Now I use the MLV_Lite version and without problems, I use a CF Sandisk 64GB Extreme Pro  160MB/s.

[alpicat]

Does anybody have an issue while recording RAW video on 50d - video recording stops and says "card file system error"?

I've never had an issue with raw on the 50D - although haven't tried recording for longer than 2 minutes. H.264 has given me some reliability issues though. I also use a CF Sandisk 64GB Extreme Pro 160MB/s

I like filming with the raw crop mode (1x1). However even with the preview option set to "Canon" (i.e. normal liveview x5 zoom framing), the display turns to grayscale as soon as I press record, which isn't bad (it's nicer than the slow framerate preview you get with the "ML Grayscale" setting), but it's a bit hard to use if trying to focus manually during recording. Wondering if anyone has been able to get round this issue? I've tried various nightly builds and all the menu settings I could think of.

Before recording - crop liveview in colour: 



During recording - turns to grayscale:



Also I use lenses with image stabilisation. and as far as I know on the 50D the only way to activate IS whilst recording video is to keep the shutter half pressed continuously whilst recording, without letting go. However, as soon as I half press the shutter whilst filming in crop mode, the display turns pink (again with the preview option set to "Canon").

Shutter half or fully pressed, pink liveview:

[cohap_zp]

You can enable "Sticky half-shutter" setting which is located in Prefs->Misc key setting.

But in this case you need to start rec on, then half-press shutter once and you are good to go.
In order to stop rec, you need half-press first and then actually stop recording.

Feels tricky, but it is worth it, especially in combination with any gimbal.

[alpicat]

You can enable "Sticky half-shutter" setting which is located in Prefs->Misc key setting.

But in this case you need to start rec on, then half-press shutter once and you are good to go.
In order to stop rec, you need half-press first and then actually stop recording.

Feels tricky, but it is worth it, especially in combination with any gimbal.

Thanks I really appreciate that - it works very well for me, and makes the camera a lot easier to use!

Now just need to understand if it's possible to shoot in 1x1 crop mode without liveview going greyscale when hitting record, and pink when pressing the shutter button to activate IS. Does this happen to anyone else?

[finalfinish]

Can anyone help me out with this flickering of the overlay in Liveview. I don't know all the technical terms of what is happening, so I just created a video to show that it is flickering in very specific spots. It does this with different cards and batteries, so I doubt they're the problem. Let me know if anyone has an idea, thanks.

Link to video: https://youtu.be/UezZ_USl7yA

[cohap_zp]

Can anyone help me out with this flickering of the overlay in Liveview. I don't know all the technical terms of what is happening, so I just created a video to show that it is flickering in very specific spots. It does this with different cards and batteries, so I doubt they're the problem. Let me know if anyone has an idea, thanks.

Link to video: https://youtu.be/UezZ_USl7yA

Have you disabled Canon's original GUI?
Blue flicker is looks like zebras on under-exposed areas, while the lower one is looks like a some sort of conflict between Magic Lantern GUI and Canon GUI.

Its just my thoughts...

[zcream]

I'd say you'd be losing a lot if you sold your 5D3 for a 50D. You'd lose proper HD raw recording, 4K crop mode, good noise performance at higher isos, sound recording, and you'd gain aliasing and moire issues in their place. 2/10 would not recommend.

I remember an old build where dual ISO mode was enabled for video. Also, 2.5K in crop mode is possible with 10-bit/12-bit mode - hopefully that will be done soon-ish. No moire in crop mode...

[kob]

just installed the nightly build for 50d
and the crop/zoom buttons are freezing the camera.
im shooting fps override to 23.95, raw 16:9, komputerbay cards, never had this issue before.

am i posting this in the right place?

[zcream]

Sad that everyone gave up on this cam. No more work on 10bit raw or hdr.

[dfort]

The feedback I got was that 10bit is working on the 50D. The test build is still on my downloads page.

[alpicat]

The feedback I got was that 10bit is working on the 50D. The test build is still on my downloads page.

I've just tested this build - works very well. Thanks so much for this dfort. In crop mode I'm now able to record at the max allowable res of 1984x1078 continuously (or nearly so) in 12 bit raw. It's fully continuous in 10 bit.

As I mentioned in my post above (21st Jan), it's a shame I'm getting a grayscale preview in crop mode once I hit record (which turns pink when half pressing the shutter button). This is with "Canon" selected under preview options. At least it's a real-time preview that isn't pixelated like the other preview options. However I'm wondering if anyone else has this issue too, since I haven't seen it discussed anywhere. Maybe it's just my camera that has a problem?

[a1ex]

Known issue on very old models (5D2, 50D and 500D). Possibly also 7D.

Last time I've looked into it (some years ago), I remember having to choose between clean recorded image (without bad pixels or other artifacts) and good preview. Clean recorded image resulted in pink Canon preview for some unknown reason. Made it grayscale as it looked nicer than pink.

Meanwhile, I think most raw converters got the ability to fix bad pixels, so this might be worth revisiting.

RE notes:
https://bitbucket.org/hudson/magic-lantern/src/36acb0f9c3e2a3df46bd9affc26e0d70c455b5b7/modules/mlv_lite/mlv_lite.c#mlv_lite.c-1111
https://www.magiclantern.fm/forum/index.php?topic=18393.0

Just in case anyone might be looking for some easy coding task that only requires a bit of patience trying different settings