Creating a new calibration patch set - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 
Thread Tools
post #1 of 6 Old 06-09-2019, 03:19 AM - Thread Starter
Newbie
 
hurodal's Avatar
 
Join Date: Jun 2019
Location: Barcelona
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Creating a new calibration patch set

Hi all,

My name is Hugo and this is my first post in this great forum.
I work as color management technician in photography but also started to also deal with TV, projectors and video a few years ago. Now I'm using CalMAN to calibrate these devices.

I used AVS709 clips for that and they are absolutely great.
But I want to create some new patches for myself, for some particular tasks. I've done some of the job, like creating the original images, but I have problems in creating the final video clips.

Here is where I ask for some help. I've seen AVS709 uses x264 [email protected], 4;2;0, nominal 15mbps, GOP N=48.
I've tried to encode my clips using Vegas Pro and Premiere pro but failed to keep the original color. If I extract a frame from the encoded clip, the RGB values of the pixels are different (and it's not something related to the legal/full RGB range). I've tested this with red patches.

Neither Vegas nor Premiere seems to let me use x264; they only use their own h.264 codec, so I guess I have to create a master clip using very low compression, like MJPEG or something similar to then do the final encoding with x264, right?

I know this is maybe a question only for experts that already created their own patches, but I don't know exactly how to achieve it.

Regards,

Hugo
hurodal is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 06-09-2019, 07:12 AM
AVS Forum Special Member
 
alluringreality's Avatar
 
Join Date: Jul 2006
Posts: 3,269
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 88 Post(s)
Liked: 90
Here is a similar thread from earlier this year. I think it includes an alternate method for the video encode from what we used.
www.avsforum.com/forum/members/7622241-alluringreality.html#/topics/3045610?page=1
alluringreality is offline  
post #3 of 6 Old 06-09-2019, 10:59 AM - Thread Starter
Newbie
 
hurodal's Avatar
 
Join Date: Jun 2019
Location: Barcelona
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Thanks Alluringreality!

Unfortunately, I cannot see any thread in the link you sent; I just end up in the 'about me' tab of your profile.
Can you check the link, please?

Regards,

Hugo
hurodal is offline  
Sponsored Links
Advertisement
 
post #4 of 6 Old 06-09-2019, 02:32 PM
AVS Forum Special Member
 
alluringreality's Avatar
 
Join Date: Jul 2006
Posts: 3,269
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 88 Post(s)
Liked: 90
https://www.google.com/amp/s/www.avsforum.com/forum/139-display-calibration/3045610-possible-make-my-own-test-patterns.html%3famp=1
alluringreality is offline  
post #5 of 6 Old 06-10-2019, 01:58 AM - Thread Starter
Newbie
 
hurodal's Avatar
 
Join Date: Jun 2019
Location: Barcelona
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
Thanks, now it works. Read.

One question: can you describe briefly the process you followed?
I mean, after you had the images you used as source, how did you create the final clips?

I thought it would be something like:

1) creating a master video in some lossless codec
2) encoding the final video in x264 with parameters that don't modify the resulting color

But after reading that thread seems to me that you created the video using one frame and with some special parameters that in FFMPEG, right?

Regards,

Hugo
hurodal is offline  
post #6 of 6 Old 06-10-2019, 02:13 AM - Thread Starter
Newbie
 
hurodal's Avatar
 
Join Date: Jun 2019
Location: Barcelona
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 0
ok, I've just read the explanation of your process in the link you posted, sorry.
Forget my question.
Thanks!

Regards,

Hugo
hurodal is offline  
Sponsored Links
Advertisement
 
Reply Display Calibration

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off