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Re: [Cellar] AV1 seeking

"Timothy B. Terriberry" <tterribe@xiph.org> Sat, 14 July 2018 20:31 UTC

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To: Steve Lhomme <slhomme@matroska.org>, Codec Encoding for LossLess Archiving and Realtime transmission <cellar@ietf.org>
References: <CAOXsMFKTNCxYcviYS0h_VYjegV3RZFvZ7AV7GhdCq=oeGmgMuQ@mail.gmail.com>
From: "Timothy B. Terriberry" <tterribe@xiph.org>
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Date: Sat, 14 Jul 2018 13:31:11 -0700
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Subject: Re: [Cellar] AV1 seeking
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Steve Lhomme wrote:
> In MP4 they have [initial_presentation_delay_minus_one] in the
> CodecPrivate. I did not understand it so far because it's not found in
> the AV1 spec. But it seems to guarantee that to read frame 'f' you
> need to decode X frame before that one. In our case that would be 5 to
> have at least a decoded.

You want to search for InitialPresentationDelay in the AV1 
specification. It is derived from the decoder model info if it is 
available (see decode_process()).

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