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Messages - lonetraceur

#1
General Help Q&A / Re: Exposure Confusion.
March 07, 2017, 09:44:12 AM
Thank you for the great reply a1ex.

That makes a lot more sense now. I do indeed use a Samyang 24mm F1.4 manual lens and I can see why the camera would 'remember' the last Canon lens I've put on it and it's relative aperture. I hadn't even thought of that. I will try the test you've suggested too.

I had considered that perhaps since the movie mode was using a 16:9 frame recording size, rather than the photo's full frame, the 'Eval' metering mode for movies was not using the top and bottom parts of the frame, therefore, using less of the picture to evaluate the metering level. This would be particularly different if, for instance, the picture had lighting at the top of bottom of the frame.

However, on reflection, I surmised that the metering would be done on the raw input of the sensor, before any cropping for video. Is this right?

As for the remembered aperture, is there a way to find out what that value is?

I think the best course of action is, as you've suggested, is to ignore the ELI altogether and use the histogram and ETTR. Since it just can't be trusted.

#2
General Help Q&A / Exposure Confusion.
March 05, 2017, 07:06:06 PM
Hi all,

I wondered if someone could explain a couple things in regards to exposure readings with Magic Lantern...

My current setup:

- 5D Mark III.
- Magic Lantern Nightly.2017Jan27.5D3113
- Video mode.
- Metering mode: Eval.
- ISO: 160, Shutter: 1/48 (180deg), Expo. Override : On, ExpSim: Movie.
- FPS Override: 23.976, Shutter fine-tuning: +0.84 ms.
- Canon Expo. simulation: On.
- Camera on tripod, unmoving.

So, the thing that is confusing me is that when I half-press the shutter button or press the 'info' button to have the canon live-view display it's metering ELI (Exposure Level Indicator), the indicator is more than -3 Stops on the scale while in video mode.

However, if I go into photo mode and look at the Live-view with the ELI it shows the indicator at +1 Stop.

Also, in the photo mode, if I look through the viewfinder at its ELI, that shows -2/3 stop.

So, I have three different readings for the exact same shot. I want to get the right exposure for RAW video, but I'm not sure what to trust. I also know I can switch on the histogram and waveform monitor, but I want to be sure that I haven't switched something on/off that's affecting these readings...

Anyone have any advice or want to verbally slap me and tell me where I'm messing up?

#3
Hey everyone,
I'm not sure if this is the right place to post this in but I've had the need recently to write a quick and simple DOS file renamer that take the contents of a corresponding .LOG file and use that data to construct a more meaningful filename for the video file.

For instance:
The Video file is: 8G4A5744.MOV
The Logfile is: MVI_5744.LOG
The Video file is renamed to: 5744_ISO320_F4_48th_50mm_23fps_4600K.MOV

It's pretty rudimentary and not very smart, but I thought I'd share it anyway. I've found it quite helpful to distinguish files quickly.

So a few things first:
1. You need to switch on the Magic lantern create logfile feature. Movie > Movie Tweaks > Movie Logging : On
2. Once you copy all your files to you computer, make sure you have ONLY the LOG files and corresponding MOV files in there you want to convert.
3. Test it first before doing anything on all your production files!
4. Copy the batch file into the same directory as the LOG and MOV files.

- SINGLE FILE RENAMER -

To run the script, simply write:

C:> VMFR logfilename.LOG videofilename.MOV

This will rename the videofile to contain the Metadata.

To create the batchfile, copy the below code into a file called: VMFR.bat


@echo off
REM ============================================
REM === VIDEOFILE METADATA FILENAME REWRITER ===
REM === Single Files                         ===
REM ============================================

REM === VARIABLES ===
set "TAB=    "

REM === CHECK FOR HELP ===
IF "%1"=="/?" (
ECHO Uses the Magic Lantern LOG files to rename corresponding video filename.
ECHO.
ECHO %tab%usage: VMFR logfile videofile.
ECHO.
ECHO Ensure that the logfile and videofile are in the same directory as this batchfile.
) ELSE (

REM === CLEAR OUTPUT FILES ===
break>output.txt
break>output1.txt
break>result.txt

REM === GRAB DETAILS FROM META FILE ===
echo filename: %1 >> output.txt
findstr "^ISO" %1 >> output.txt
findstr "^Aperture" %1 >> output.txt
findstr "^Shutter" %1 >> output.txt
findstr "^Focal length" %1 >> output.txt
findstr "^FPS" %1 >> output.txt
findstr "^White" %1 >> output.txt
@echo %2 >> output.txt

REM === SET TOKENS ONTO A LINE ===
for /f "tokens=* delims=" %%i in (output.txt) do (
  echo/|set /p ="-%%i" >> output1.txt
)

REM === GRAB TOKENS FROM LOG FILE ===
  FOR /F "tokens=3,6,9,13,17,20,24,30 delims=:_./-, " %%i in (output1.txt) DO (
    SET filename=%%i_ISO%%j_F%%k_%%lth_%%mmm_%%nfps_%%o.%%p
    @echo %filename% >> result.txt
    REN %2 %filename%
)

REM === DELETE OUTPUT FILES ===
DEL output.txt
DEL output1.txt
DEL result.txt
)



- MULTI FILE RENAMER -

Further on from the single file renamer, I've written a multi-file renamer. This will rename an entire folder of .MOV files using their corresponding .LOG files.
The usage is slightly different and again, very basic, but it works.

If you have a group of MOV files labelled : 8G4A5744.MOV,8G4A5745.MOV,8G4A5746.MOV, etc...
And the corresponding LOG files named : MVI_5744.LOG,MVI_5745.LOG,MVI_5746.LOG, etc...

To use, you need to simply add the MOV file prefix and file extension.
So the video files Prefix would be : 8G4A in this example and the extension is MOV

So to run the script you would type:

C:> VMFR_multi 8G4A MOV

Again, similar to the single file renamer, you can paste the below code into a file called VMFR_multi.bat (or whatever you like).

See code below:


@setlocal enableextensions enabledelayedexpansion
@echo off
REM ============================================
REM === VIDEOFILE METADATA FILENAME REWRITER ===
REM === Multi Files                          ===
REM ============================================

REM === VARIABLES ===
set "TAB=    "

REM === CHECK FOR HELP ===
IF "%1"=="/?" (
ECHO Uses the Magic Lantern LOG files to rename corresponding video filenames.
ECHO.
ECHO %tab%usage: VMFR [videofileprefix] [videofileextension].
ECHO.
ECHO.
ECHO This batchfile will search for the all the LOG files in the current directory and
ECHO try to match using the last four digits of the filename to the corresponding
ECHO Movie file.
ECHO It will then rename the movie file with the Magic Lantern Metadata.
ECHO.
) ELSE (

REM === CLEAR FILES ===
break>output.txt
break>result.txt

REM === CREATE THE NEW FILENAME FOR EACH LOGFILE ENTRY ===
FOR %%f in (*.LOG) DO (
SET FILENAME=%%f
SET FILENAME=!FILENAME:~4,4!
SET VIDEOFILE=%1!FILENAME!.%2
FOR /F "delims=" %%a in ('findstr "^ISO" %%f') DO SET ISO=%%a
FOR /F "delims=" %%a in ('findstr "^Aperture" %%f') DO SET APERTURE=%%a
FOR /F "delims=" %%a in ('findstr "^Shutter" %%f') DO SET SHUTTER=%%a
FOR /F "delims=" %%a in ('findstr "^Focal length" %%f') DO SET FOCAL=%%a
FOR /F "delims=" %%a in ('findstr "^FPS" %%f') DO SET FPS=%%a
FOR /F "delims=" %%a in ('findstr "^White" %%f') DO SET WHITE=%%a

ECHO !FILENAME! !ISO! !APERTURE! !SHUTTER! !FOCAL! !FPS! !WHITE!, !VIDEOFILE! >> output.txt
)

REM === OUTPUT THE NEW FILENAMES TO A RESULT FILE ===
FOR /F "tokens=1,3,6,10,14,17,21 delims=:_./-, " %%i in (output.txt) DO (
  SET filename=%%i_ISO%%j_F%%k_%%lth_%%mmm_%%nfps_%%o.%2
SET videofile=%1%%i.%2
  @echo !filename!,!videofile! >> result.txt
)

REM === RENAME FILES ===
FOR /F "tokens=1,2 delims=, " %%a in (result.txt) DO (
REN %%b %%a
ECHO Renamed %%b = %%a
)

REM === HOUSEKEEPING ===
DEL output.txt
DEL result.txt
)



Anyway, I hope this helps someone. It definitely helps to speed up my workflow, especially when I import a lot of footage into Premiere and then have to relabel everything.

I'm sure it could be improved upon a lot (Selecting which metadata to use, etc...) but it's a start.  :)

Good luck!

#4
Fantastic! Given it a go and it does indeed do what I need, thank you so much for the heads-up baldand!
#5
Thanks for the response g3gg0, not to worry, I understand it's a very niche thing to ask for. I'll keep an eye on the FFMPEG future releases then. Cheers.
#6
Raw Video Postprocessing / MLV to Proxies only.
May 11, 2014, 05:55:37 PM
Hey guys and gals,

Great work to everyone involved in the RAW project, really respect what you guys have done. I'm just enquiring if there's a possibility to convert your .MLV files to a proxy file without going through the DNG conversion process?
I want to convert all my files to .mov's or something I can edit in Premiere and then convert only the MLV files I've used to DNG's after the editing process. I know the RAW Video Converter 1.9.2 can create the proxies, but you can only do it while creating the DNG files too as far as I can see.

If not possible, no worries, just thought I'd ask.

Cheers!
#7
Hey Guys,
Thank you for the responses. It seems it's an issue with Photoshop. I downloaded and installed Capture One which opened the files fine. I can also send them straight to ACR through Capture One as a DNG which is a bonus.
I'll have to have a look into Photoshop and try reinstalling again.

Thanks!
#8
Hi there,
I absolutely love ML and the stuff you guys have been doing. I've been happily taking RAW video for a little while and have got a fairly reliable workflow going on. However, yesterday I needed to take a couple of photographs using the camera, so I set it to RAW (CR2) and snapped away.
After copying the files to my computer (thumbnails in Explorer (PC) loading OK) I double-click to open up in photoshop/ACR and it failed to open the files. I've successfully opened them up into UFRAW and saved as TIFFs, but I'm a little concerned that I can no longer open up the standard Canon CR2 files in Adobe Camera Raw anymore.

I tried taking pictures after resetting the ML settings, removing the SD card (with ML on it) and taking a picture without ML being loaded, Changing the CF card to a new one, reformatting the CF card, setting all the 5D settings back to default and also re-installing Photoshop. None of these have fixed the problem. Can anyone shine any light on this situation at all please?

I appreciate any help anyone can give...

Many thanks,

Andy.
#9
Share Your Videos / 5D mark III Raw Parkour.
June 26, 2013, 04:54:15 PM
A quick bit of test film footage of some Parkour training at Abbey Road estate, Kilburn, London, UK.
The purpose of the short was to test the new 5D Mk III MagicLantern 14-bit 4:4:4 Raw capabilities...
(And have a bit of fun training in the process)



The Specs are below:
Camera : Canon 5D Mark III
Lens : Samyang 24mm F1.4
Lens : Tokina 11-16mm F2.8
ND : LightCraft VariND
Slider : Varavon Slidecam Lite

ISO : 160
Shutter : 1/47 (180 degrees)
F/Stop : F1.4
WB : 6200k
Picture Style : Lightform-C
Data : 14bit raw 4:4:4
Firmware : MagicLantern v2.3
Filmed by Andy Pearson (@lonetraceur, ParkourGenerations.com)
Featuring Andy Pearson & Kevin Francomme (ParkourGenerations.com)
Music : "No Exit" by Jake Rousham (liftmusic.co.uk)

Software used :
raw2dng.exe
Adobe Camera Raw
Adobe After EffectsCS6 + Magic Bullet Looks
Adobe Premiere CS6 + Neat Video Noise Reduction
#10
Hey guys,
First time post here. I just finished building a super simple DIY remote record button for my 15mm shoulder rig and 550d. I needed to use MagicLantern's 'Movie Rec Key' function to set to 'HalfShutter' for it to work, but it really does work well and very handy!

Anyway, for a full run down of the construction you can see it on my website here: http://albionartworks.com/dslr-rig-remote-record-button/