KJSL tests

KJSL Sync

KJSL Sync

KJSL Sync

KJSL Sync

KJSL macOS Sonoma fun and games

KJSL Sync

Sync v5.0.0

Patch https://trac.ffmpeg.org/ticket/8760

Revert "lavc/vaapi_encode: add EQUAL_MULTI_ROWS support for slice str…

…ucture"

This reverts commit 489c5db.

Treating EQUAL_MULTI_ROWS in the same way as the arbitrary-size cases is
just wrong.  Consider 9 rows, 4 slices - we pick 4 slices with sizes
{ 3, 2, 2, 2 }, which EQUAL_MULTI_ROWS does not allow.  It isn't possible
to split the frame into 4 slices at all with the EQUAL_MULTI_ROWS
structure - the closest options are 3 slices with sizes { 3, 3, 3 } or 5
slices with sizes { 2, 2, 2, 2, 1 }.