Video filter enhancement: fieldhint

[Stanislav]

Hi,

Could you please implement a case when the filter (fieldhint) creates a frame using only one field.
Example of a file containing hints (relative mode):

0,0 - # first frame
1,0 - # second frame
1,0 - # third frame
1,0 -
0,0 -
0,0 -
1,0 -
,0 -
1,0 -
0,0 -
0,0 -
1, -
1,0 -
1,0 -
0,0 -

Some lines contain only one figure - that means 'use only one field to create this frame'.
Sometimes interlaced videos contain errors like missing frame between two adjacent frames. In this case, you can only use one field to create a frame.

Thank you.

[Stanislav]

Another reason to implement this case is that one of two fields can be broken.

[Elon Musk]

Do you have short sample where this would be useful?

[Stanislav]

Replying to richardpl:

Do you have short sample where this would be useful?

Yes. I have one - 7MB.

[Elon Musk]

Upload sample somewhere and post a link.

[Stanislav]

This is a BFF interlaced video:

​http://dropmefiles.com/HRkzc

[Elon Musk]

Don't tell me you use this filter for deinterlacing?

[Stanislav]

Why not in case of 25i TFF or BFF?
What are you using it for?

[Elon Musk]

For fieldmatching strange patterns other ivtc filters can not handle.

[Stanislav]

To be honest I didn't understand what you meant.

I used this hint file:
​http://dropmefiles.com/Yanvx

and this command:
ffmpeg -i komandirovka-002.mkv -vf fieldhint=fieldhint.txt:mode=relative %06d.png

Have a look at files 000014.png and 000144.png

[Elon Musk]

Added in 7056ddc0e0f1a55996add89e30f0f43054bc68f0