Re: Exposing HDR metadata in bitstreams through WebCodecs API

With links to the standards!
Maybe with a list of which parameters are encoded, but hopefully we don’t need to document the code values.


On 10/25/21, 5:03 PM, "Pierre-Anthony Lemieux" <> wrote:

    Hi Wan-Teh,



    How should we catalog these parameters? Markdown on our github repo,
    issue on WebCodes repo, Google doc? Any preference.


    -- Pierre

    On Mon, Oct 25, 2021 at 6:59 PM Wan-Teh Chang <> wrote:
    > Hi Pierre-Anthony,
    > On Mon, Oct 25, 2021 at 3:39 PM Pierre-Anthony Lemieux <> wrote:
    > >
    > > It was pointed out earlier today that now would be a good time to
    > > identify any HDR/WCG metadata present at the video codec bitstream
    > > level (as opposed to metadata at the container level), so that the
    > > metadata can be exposed through the WebCodecs API.
    > >
    > > Please reply to this thread if any such metadata comes to mind.
    > AV1 has two HDR metadata types: METADATA_TYPE_HDR_CLL and
    > METADATA_TYPE_HDR_MDCV. See the AV1 specification:

    > In addition, the AV1 metadata type METADATA_TYPE_ITUT_T35 is
    > extensible and can be used to carry HDR10+ dynamic metadata. See

    > Wan-Teh Chang

Received on Tuesday, 26 October 2021 05:47:05 UTC