Hi All
I have been using Full-resolution LiveView: 5796x3870 at 7.4 fps (128ms rolling shutter) - continuous*) at 5 FPS! with success to capture still macro.
Given the low frame rate (5fps) has anyone used this , if so what is the recommend shutter speed for such slow rate under ML for a stationary subject/object. I see that "they" state to double the shutter speed of the FPS. which means if its 5fps then my speed should be 1/10. Given the subject is stationery and there is no movement is there any advantage of increasing the shutter speed. I have done some tests and cannot tell the difference other then loss of light.
cheers
Denis
could you upload the video in full resolution if possible
Hi muanthang,
Apologies, i forgot to mention that I am using a 5x or 10x microscope at the end of my camera and there the video is very blur except for parts of the "slice" that are in focus ( shallow dof) as I am moving very slowly towards the subject matter on a rail. I then extract the DNGs from the video and then stack them. I can upload an image of the stacked image when I get home tonight.
cheers
Denis
Can you upload a sample MLV? Would like to check it. You can use:
mlv_dump -f 5 Output.MLV Input.MLV
Or create a sample package in Switch from (m) mlv_dump menu.
Hi Danne
Thanks for your help with your software before that got me going.
Yes I will upload it when I get home. There seem to be lots of haze as well. I will show a pic of my setup as well. My continuous light is behind the lens and therefore no light in going into the lens.
cheers
Denis
No worries. I am also interested in the MLV sample itself :)
Are you developing those files in Switch by the way?
Danne
Not sure what Switch is? I just use your programs to extract DNGS from MLV, then I put all dngs into Helicon to stack them. Then I save as TIF and process the single stacked image in Adobe Camera Raw, then into CC
What is the purpose and benefit/s of Switch?
cheers
Denis
It's my mac workflow
http://www.magiclantern.fm/forum/index.php?topic=15108.0
Maybe you're on windows, can't remember :)
:) Yes I am using windows. Can I simulate your workflow in Windows.
Can I please see likes to your videos?
I am going home now. Just finished work.
:
I started porting the scripts to linux subsystem on windows 10. Most of it kind of works but needs some last touchups.
Hi Danne
The MLV is going to take hours to upload. In the meantime here are some screen captures of the stacked files. NO EDIT DONE
Sorry Danne, did not finish my previous post. Cannot upload my screen captures, as its stating BAD GATEWAY
Try shorten your MLV file:
mlv_dump -f 5 Output.MLV Input.MLV
does not work. tried at cmd , mlv_dump -f 5 M31-1735-Copy.MLV M31-1735-Copy.MLV. What am I doing wrong
Mode of operation:
- Input MLV file: 'M31-1735-Copy.MLV'
- Verify file structure
File M31-1735-Copy.MLV opened
File M31-1735-Copy.M00 not existing.
Processing...
Unknown Block: VERS, skipping
Unknown Block: VERS, skipping
Reached end of chunk 1/1 after 423 blocks
Processed 412 video frames
Done
There is no *.M00 files in the folder
These are some screen captures with no edit or noise reduction
If you check the left hand corner there is a significant issue about 20-30% that is corrupted.
(http://thumb.ibb.co/hewbia/9_1_2017_6_37_33_PM.jpg) (http://ibb.co/hewbia)
(http://thumb.ibb.co/em5DUF/9_1_2017_6_29_18_PM.jpg) (http://ibb.co/em5DUF)
(http://thumb.ibb.co/bW8Twv/9_1_2017_6_35_21_PM.jpg) (http://ibb.co/bW8Twv)
some samples , What I see in Bridge of the extracted DNGS
(http://thumb.ibb.co/ero6ia/9_1_2017_7_45_32_PM.jpg) (http://ibb.co/ero6ia)
Sorry, should be this:
mlv_dump -f 5 -o Output.MLV Input.MLV
Amazing shot example.
Still an issue, I am using MLV Dumper v1.0. Is the syntax I wrote correct "mlv_dump -f 5 -o M31-1735-Copy.MLV M31-1735-Copy.MLV"
IN CMD
C:\Users\Denis\Desktop\___RAWTODNG TEST\___WORK AREA 6\ORIGINALS>mlv_dump -f 5 -o M31-1735-Copy.MLV M31-1735-Copy.MLV
MLV Dumper v1.0
-----------------
Mode of operation:
- Input MLV file: 'M31-1735-Copy.MLV'
- Rewrite MLV
- Output into 'M31-1735-Copy.MLV'
File M31-1735-Copy.MLV opened
File M31-1735-Copy.M00 not existing.
Processing...
Reached end of chunk 1/1 after 0 blocks
Processed 0 video frames
[ERROR] Failed to rewrite header in .MLV file
Done
hold on, something is happening
You mustn´t use the same name for input and output. It might erase your file even. Be careful.
oops it was a layer8 issue, between the chair and the PC, ME !
it worked. file went from 8.2gb to 120k
will upload it now
I accidentally deleted the MLV files for the sample captures i attached to the previous post but this give you an idea
https://www.dropbox.com/s/fwwzy8u6pu8bw1l/M31-1735Copy22.MLV?dl=0
cheers
Sorry to hear about the footage loss :(. It's the naming. Should be a safeguard for this in mlv_dump.
is that link ok
I am grateful for your help and time, very kind of you. Can I improve on the quality of those DNG's somehow, may not be possible
Yes, thanks a lot :).
I notified g3gg0 about this fatal erasing error in mlv_dump. Hopefully he can put in a safeguard of some kind.
Any dng corruption examples I think could be of interest for a1ex maybe. I have very little knowledge of how to control what´s going on inside the camera.
again my error as I am shooting at 1:1 and the rail is moving forward in UM ( micro mm ) I think there is diffraction or telecentric issue.
I checked all the dngs individually and cannot see any corruption of the left side but I suspect when they are stacked there is change in the image size ( I think) .
I might try 16:9 or different ratio maybe but I am clutching at straws
That's good. Do post results you are getting. Seems like exciting footage and workflows.
Thanks I will I and really not sure what I am doing with the video settings but I will try several different combinations and post them
So what do you see with the file I uploaded?
I am going to take more video and will chat later, thanks
Danne, are you on facebook, its nice to put a face to a friend.
The files looks ok. I wanted to check dng processing behaviour on bigger files and it works well too.
I'll send you a pm about the other query.
with the mlv_dump, what parameters would help in terms of better quality , if any , when I extracted the DNG's in yr opinion?
For 5D mark III I wouldn't mess with settings unless something seems wrong. Darkframes are always good to include.
ok thanks, so just hit 'r"' only :)
Hi Danne
FYI: You may be interested that I get some corrupted DNGS from time to time but I am not sure the cause"
1. issue with crop rec bug? or
2. issue when files are being extracted to DNG ?
3. issue with CF card?
This folder had 353 DNGs and only 1 dng was corrupt.
cheers
Denis
(https://thumb.ibb.co/caFkUF/9_5_2017_8_06_58_PM.jpg) (https://ibb.co/caFkUF)
I´m guessing something in camera.
Can you upload the original MLV?
Ok Alex, I deleted the MLV but will do more tonigh
Hi Alex
Well I created about 12 mlvs but no corruptions. Must be intermittent,
I am still taking MLVs and if it occurs I will provide the MLV and advise you.
Thanks for your patience
cheers
Denis
Hi Alex
I made many mlvs last week but I am unable to recreate the DNG corruption .
I will keep checking
cheers
Denis
Hi Alex
You requested a sample MLV file . I had this issue from time to time as an intermittent problem.
I did a movie today and all 3 MLV's were corrupted, Every single DNG.
cheers
Denis
Attached is the MLV link of the corrupted file
I ran: mlv_dump -f 2-10 -0 corrupt.mlv m24-0944.mlv
https://www.dropbox.com/s/tcpxrt0zzk8dlqr/corrupt.mlv?dl=0
(http://thumb.ibb.co/jbTiOk/9_24_2017_12_04_41_PM.jpg) (http://ibb.co/jbTiOk)
Best guess: some issue during lossless compression.
Would be great if you can find a way to reproduce it. Can you exclude this scenario?
http://www.magiclantern.fm/forum/index.php?topic=19300.msg188952#msg188952
(taking a still picture from Canon's movie mode appears to interfere with the lossless compression)
Thanks Alex.
Ah yes, I think I may have accidentally hit the Canon movie mode initially.
I will retest and get back to you.
cheers
Denis
Hi Alex
A general question.
Is it technically feasible to increase the FPS for the current 5796x3870 @ 5fps or have we hit the 'physical' limit?
cheers
Denis
The physical limit (or possibly also a limit given by our lack knowledge) is about 7.4 FPS.
The 5 FPS limit is given by card write speed. Saving on both SD and CF might give a small improvement (probably about 6 FPS); not sure if it's worth the trouble for implementing it.