Backport of "qtdemux: opus: set entry as sampled" into 1.22
requested to merge tpm/gstreamer:mr-4903-backport-into-1.22-qtdemux-opus-single-sample-size-stsz into 1.22
Backport of !4903 (merged) "qtdemux: opus: set entry as sampled".
Commits:
- 1d00f726 qtdemux: opus: set entry as sampled