Quoting James Almer (2020-05-11 16:27:55)
> If extradata is available, use it to initialize the AVCodecContext before
> packet data is seen. Also, don't constantly overwrite it after it's set.
>
> Signed-off-by: James Almer <jamr...@gmail.com>
> ---
> The main benefit from this is using ff_decode_frame_props() to fill frame
> props, which includes copying any relevant side data that may be present in
> packets, like for example container mastering metadata propagated by a
> demuxer.
>
> libavcodec/libdav1d.c | 102 +++++++++++++++++++++++++++++-------------
> 1 file changed, 71 insertions(+), 31 deletions(-)
>
> diff --git a/libavcodec/libdav1d.c b/libavcodec/libdav1d.c
> index 5248e3f9f5..72f06c550e 100644
> --- a/libavcodec/libdav1d.c
> +++ b/libavcodec/libdav1d.c
> @@ -42,6 +42,8 @@ typedef struct Libdav1dContext {
> int apply_grain;
> int operating_point;
> int all_layers;
> +
> + int inited;
> } Libdav1dContext;
>
> static const enum AVPixelFormat pix_fmt[][3] = {
> @@ -117,9 +119,59 @@ static void libdav1d_picture_release(Dav1dPicture *p,
> void *cookie)
> av_buffer_unref(&buf);
> }
>
> +static int libdav1d_init_params(AVCodecContext *c, Dav1dSequenceHeader *seq)
> +{
> + Libdav1dContext *dav1d = c->priv_data;
> + int res;
> +
> + if (dav1d->inited)
> + return 0;
Changing parameters mid-stream is not supported?
--
Anton Khirnov
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