31.10.2020, 23:41
Quote:]So far so good, this I can reproduce.
Step 1: Launch "Hybrid".
Step 2: Load " input.m2v" you provided me with.
Step 3: Crop/Resize -> Input PAR 8:9 -> Force Input PAR type: generic, Convert output to PAR "Square Pixel (1:1) - it shows proper 720x540.
Quote:step 4: Activate "Picture Crop" - crop right side to 6 px.same here
- "Picture Resize" with Auto adjust - "height" shows 720x546
Quote:So, I need to crop extra 6 pixels (that's incorrect, correct value is 4px) from top/bottom to get 540That assumption is only correct if:
a. input and output PAR
and
b. input and output width is the same
or
these two compensate each other.
Quote:Crop: bottom - 4px, top- 2px. Picture Resize shows 720x538 (instead of 540).Yes, and 538 is correct.
What Hybrid calculates is:
crop resolution: 714x474
target width: 720 -> resizeMult = 720/714 = 1.0084033613445378151260504201681
target par: 1:1 -> parMult = 9/8
resized height = cropHeight*resizeMult*parMult = 474*1.0084033613445378151260504201681*9/8 = 537.73109243697478991596638655462 = 538
-> Hybrid is correct here.
Quote:Crop: bottom - 2px, top- 2px. Picture Resize shows correct 720x540.crop resolution: 714x476
target width: 720 -> resizeMult = 720/716 = 1.0055865921787709497206703910615
target par: 1:1 -> parMult = 9/8
resized height = cropHeight*resizeMult*parMult = 476*1.0055865921787709497206703910615*9/8 = 538.49162011173184357541899441341 = 539 which gets rounded to 540 since mod2 is configured (and required due to the color space).
-> Hybrid is correct here.
=> The problem is that you did not think about the resizeMult and parMult that are part of the calculation, since resize should be always done after cropping in Hybrid.
![Smile Smile](https://forum.selur.net/images/smilies/smile.png)
In Hybrid currently the processing order always is:
1. crop
2. resize
3. letterbox
(Now that I think about it, there is another bug: this order is not enforced when using Avisynth or Vapoursynth)
Cu Selur