TVPaint frame range definition

[iLLiCiTiT]

Changes

• TVPaint implementation does not care about Mark In/Out values but only range
  • Frame index of Mark In is not modified so artist can set it to different frame than 1 but duration of Mark In/Out must match to duration of asset (shot) ({frame end} - {frame start} + 1) + {handle start} + {handle end}
• Layers that does not have any content in Mark range are skipped during extractor
• extractor extract range from Mark in/out but then rename file sequences to right names
  • e.g. if Mark In is 0 and frameStart is 1001 then output "frame.0000.png" is renamed to "frame.1001.png"
  • renaming is going backwards from Mark Out/Frame End to Mark In/Frame Start to avoid clashing of filenames

	Pype 2 PRs
pype	#1424

EDITED 29.4.2022:

New changes

• as validation of mark in/out is optional extractor can handle that
  • if mark in/out range match output range it should have no affect
• renaming of filenames happens in one method out of rendering methods

[64qam]

Looks good