How does one choose the correct codec tag to use (hvc1
or hev1
) when muxing HEVC video into fragmented MP4 for streaming with MPEG-DASH/HLS?
I reckon there's a slight difference in muxing depending on the tag according to ISO/IEC FDIS 14496-15
:
When the sample entry name is 'hvc1', the default and mandatory value of array_completeness is 1 for arrays of all types of parameter sets, and 0 for all other arrays. When the sample entry name is 'hev1', the default value of array_completeness is 0 for all arrays.
Is there anything else apart from this?
Why are there two tags and what is the criteria to choose between the two?
Side note: Apple prefers hvc1
according to their HLS Authoring spec for some reason.