Magic Lantern Forum

Using Magic Lantern => Raw Video => Raw Video Postprocessing => Topic started by: sterid on August 06, 2015, 08:47:16 AM

Title: 6D MLV RAW with high ISO highlight dots
Post by: sterid on August 06, 2015, 08:47:16 AM
hello,
i get some highlight dots in my raw video when shooting with high iso (12800).
1. convert my mlv file with mlv_dump to dng files. Open first file and it looks good in PS camera raw (http://i.imgur.com/OpGNMZd.jpg). Original dng file here  (https://drive.google.com/file/d/0B50cOI7XcpvgbEtYYUZnbW0xLUU/view)
2. import dng files in Davinci Resolve and get some highlight dots (http://i.imgur.com/ulwwm2f.png). My project settings is Cinema DNG  with BMD Film and "highlight recovery" checkbox enabled
3. After export from DR to MOV file highlighs dots keeps. Screenshot from MPC-HC (http://i.imgur.com/giIIhJY.jpg)

MOV file for example (https://drive.google.com/file/d/0B50cOI7XcpvgblNTdUg1TFQ1WkE/view?usp=drivesdk)

I try use --fixcp and --cs2x2 but nothing changes. How to fix ?
Title: Re: 6D MLV RAW with high ISO highlight dots
Post by: KelvinK on August 06, 2015, 12:37:05 PM
It's a common issue for all canon cameras shooting RAW. Some have more, some have less dead-hot pixels. In RAW mode you shouldn't really go over 3200 or even 1600 ISO.
Title: Re: 6D MLV RAW with high ISO highlight dots
Post by: Levas on August 06, 2015, 12:54:27 PM
What could help a little is remapping hot/dead pixels.
google for canon pixel remapping body cap.
Title: Re: 6D MLV RAW with high ISO highlight dots
Post by: sterid on August 06, 2015, 02:25:28 PM
Ok, i`m understand my mistake. But what can i do to fix in exist mlv file ?

I through that hot\dead pixels are stable on matrix. But on video they are chaotic moves during all file.
Title: Re: 6D MLV RAW with high ISO highlight dots
Post by: AWPStar on August 06, 2015, 04:51:36 PM
@sterid
You can try my app (http://www.magiclantern.fm/forum/index.php?topic=15271.msg148538#msg148538) to convert mlv/raw files.
It has Hot/dead pixel remover.
Title: Re: 6D MLV RAW with high ISO highlight dots
Post by: sterid on August 07, 2015, 09:54:38 AM
thax, your function "remove hot px" work fine.
But I just change my workflow to use Adobe Camera Raw before import in Resolve. ACR has built-in function "remove hot pixels".
Title: Re: 6D MLV RAW with high ISO highlight dots
Post by: sterid on August 13, 2015, 04:59:44 PM
Unfortunately ACR didn`t remove hot pixel in file. ACR just don`t show hot pixels....

I find this function in different tool - MlRawViewer (Just press 0 and add to export queue). Great!