moov/trak/mdia/minf/stbl/sbgp
Sample to Group
group_description_index: gives the index of the sample group entry which describes the samples in this group
(content element) is (content element value for independent) but (container element for IPF) or (container element for IF) does not indicate this frame is independent.
usacIndependencyFlag is 1 but MP4 stts or (container format) (container element for independent frame (IF)) does not indicate this frame is independent
(preroll count field) is (value) but (expected value) is recommended due to (reason)
(container format) (container element for immediate play-out frame (IPF)) or (container format) (container element for independent frame (IF)) does not indicate this frame is independent but (content format) (content element) (content field) (value) indicates this frame is independent
(container format) (container element for independent frame (IF)) indicates this frame is an independent frame (IF) but (content format) (content element) (content field) (value ) indicates this frame is not an independent frame (IF)
(container format) (container element for independent frame (IF)) indicates this frame is an independent frame (IF) but USAC AudioPreRoll is present
(container format) (container element for independent frame (IF)) does not indicate this frame is an independent frame (IF) but USAC AudioPreRoll is not present
roll_distance is (roll_distance value) but > 0 is required
roll_distance is (roll_distance value) but <= 3 is required
(container format) (container element) is not present and this is an independent frame (IF), seeking is not optimal