avenc_prores_ks Supports format: { (string)I422_10LE, (string)Y444_10LE,
(string)A444_10LE }. Use required format generate required test pattern.
gst-launch-1.0 videotestsrc ! video/x-raw,format=A444_10LE ! avenc_prores_ks
! qtmux ! filesink
location=test.mov -e
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