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You may have seen that question in other section of this forum. Sorry for spam then, but I really need to get some clues. Here comes the question:
How to make function libvlc_video_set_crop_geometry() work without predefining the crop geometries with option --custom-crop-ratios at instance creation? So that it works with any dimensions given as argument?

As far as I know it just works with any values as long as the string is well-formatted. I did not try though.

That would be logical, but... The string format is the following: "<width>x<height>+<offset_x>+<offset_y>", right? With no options specified, nothing happens after calling the function. If the instance is started with options:
--vout-filter=crop --custom-crop-ratios=100x100+0+0
the function works if called in a following way:
<media_player>.video_set_crop_geometry("100x100+0+0") (I use python bindings)
Obviously, only for dimensions specified in options. Am I correct? Or different options should be used to make it work?

They're three formats: numerator:denominator, wdith:height+x+y and leftright:bottom

--custom-crop-rations just adds items in the choice list for the user interface. But yeah, the variable subsystem rejects unlisted choices. So someone would need to patch the LibVLC crop geometry function to automatically add the choice.

Could you (or anyone else) briefly instruct me which changes should be done in the source code then?

Probably that:

http://git.videolan.org/?p=vlc.git;a=bl ... 59ec4a0adf

Hi,

I had difficulties to make libvlc_video_set_crop_geometry works well.
I finally succeed using the following parameters :
"rigthxbottom+left+top"

Thank you sooooo much!