Full-resolution LiveView: 5796x3870 at 5fps

[denishogan]

 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

[muanthang]

could  you   upload  the  video  in full resolution  if  possible

[denishogan]

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

[Danne]

Can you upload a sample MLV? Would like to check it. You can use:

Code Select Expand

mlv_dump -f 5 Output.MLV Input.MLV
Or create a sample package in Switch from (m) mlv_dump menu.

[denishogan]

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

[Danne]

No worries. I am also interested in the MLV sample itself 
Are you developing those files in Switch by the way?

[denishogan]

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

[Danne]

It's my mac workflow
http://www.magiclantern.fm/forum/index.php?topic=15108.0
Maybe you're on windows, can't remember

[denishogan]

  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.
:

[Danne]

I started porting the scripts to linux subsystem on windows 10. Most of it kind of works but needs some last touchups.

[denishogan]

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

[denishogan]

Sorry Danne, did not finish my previous  post. Cannot upload my screen captures, as its stating BAD GATEWAY

[Danne]

Try shorten your MLV file:

Code Select Expand

mlv_dump -f 5 Output.MLV Input.MLV

[denishogan]

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

[denishogan]

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.











some samples , What I see in Bridge of the extracted DNGS

[Danne]

Sorry, should be this:

Code Select Expand

mlv_dump -f 5 -o Output.MLV Input.MLV

Amazing shot example.

[denishogan]

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

[denishogan]

hold on, something is happening

[Danne]

You mustn´t use the same name for input and output. It might erase your file even. Be careful.

[denishogan]

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

[denishogan]

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

[Danne]

Sorry to hear about the footage loss . It's the naming. Should be a safeguard for this in mlv_dump.

[denishogan]

is that link ok

[denishogan]

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

[Danne]

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.

[denishogan]

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

[Danne]

That's good. Do post results you are getting. Seems like exciting footage and workflows.

[denishogan]

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.

[Danne]

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.

[denishogan]

with the mlv_dump, what parameters would help in terms of better quality , if any , when I extracted the DNG's in yr opinion?

[Danne]

For 5D mark III I wouldn't mess with settings unless something seems wrong. Darkframes are always good to include.

[denishogan]

ok thanks, so just hit 'r"' only 

[denishogan]

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

[Danne]

I´m guessing something in camera.

[a1ex]

Can you upload the original MLV?

[denishogan]

Ok Alex, I deleted the MLV but will do more tonigh

[denishogan]

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

[denishogan]

Hi Alex

I made many  mlvs last week but I am unable to recreate the DNG corruption .

I will keep checking

cheers
Denis

[denishogan]

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

[a1ex]

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)

[denishogan]

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

[denishogan]

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

[a1ex]

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.