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nevcairiel · 20th October 2018, 17:50

The spec is slightly vague when it comes to this, but even if it would be technically allowed to encode a lower format in a higher profile, you should never do that. There is absolutely no reason to. It'll just screw everything over.
The only thing the profile controls is chroma/bitdepth, there are no other variables, so pick the one appropriate for your content and don't do anything else.

A very strict reading of the spec might even forbid this, ie. Section 6.4.1 (General sequence header OBU semantics) has a table with allowed features per profile, and it has no "backwards" notes.
So I'll go with that. Its not allowed.

20th October 2018, 17:50	#1157 \| Link
nevcairiel Registered Developer Join Date: Mar 2010 Location: Hamburg/Germany Posts: 10,346	The spec is slightly vague when it comes to this, but even if it would be technically allowed to encode a lower format in a higher profile, you should never do that. There is absolutely no reason to. It'll just screw everything over. The only thing the profile controls is chroma/bitdepth, there are no other variables, so pick the one appropriate for your content and don't do anything else. A very strict reading of the spec might even forbid this, ie. Section 6.4.1 (General sequence header OBU semantics) has a table with allowed features per profile, and it has no "backwards" notes. So I'll go with that. Its not allowed. __________________ LAV Filters - open source ffmpeg based media splitter and decoders Last edited by nevcairiel; 20th October 2018 at 17:57.