[FFmpeg-devel] [PATCH] avformat/mov: Only read the primary item for AVIF

[Vignesh Venkatasubramanian]

On Fri, Jun 10, 2022 at 10:34 AM Vignesh Venkatasubramanian
<vigneshv at google.com> wrote:
>
> On Thu, Jun 9, 2022 at 12:50 AM Gyan Doshi <ffmpeg at gyani.pro> wrote:
> >
> >
> >
> > On 2022-06-08 10:51 pm, Vignesh Venkatasubramanian wrote:
> > > On Thu, Jun 2, 2022 at 1:35 PM James Zern <jzern at google.com> wrote:
> > >> On Wed, Jun 1, 2022 at 1:38 PM Vignesh Venkatasubramanian
> > >> <vigneshv at google.com> wrote:
> > >>> On Wed, Jun 1, 2022 at 10:30 AM James Zern <jzern at google.com> wrote:
> > >>>> On Sun, Apr 24, 2022 at 11:35 AM Vignesh Venkatasubramanian
> > >>>> <vigneshv-at-google.com at ffmpeg.org> wrote:
> > >>>>> Update the still AVIF parser to only read the primary item. With this
> > >>>>> patch, AVIF still images with exif/icc/alpha channel will no longer
> > >>>>> fail to parse.
> > >>>>>
> > >>>>> For example, this patch enables parsing of files in:
> > >>>>> https://github.com/AOMediaCodec/av1-avif/tree/master/testFiles/Microsoft
> > >>>>>
> > >>>> Can some of the failing files or similar ones be added to fate?
> > >>> There are no fate tests for AVIF parsing as of now. I was thinking
> > >>> about adding some for the muxing. But i am not sure what can be done
> > >>> here for the parsing.
> > >>>
> > >> Thanks. Are there any for general mov/mp4 parsing that could be
> > >> extended? This looks good otherwise.
> > >  From what i see, most of the mov tests only seem to be for muxing. I'm
> > > not entirely certain about how to add a test for AVIF parsing. If
> > > anybody has an idea, i'd be open to adding it.
> >
> > Basic test would use the framemd5 muxer to compare demuxed packets with
> > a reference.
> > See fate-ffmpeg-streamloop
> >
>
> Thank you i have added a couple of fate tests.
>
> I am not sure how to add the AVIF files to the fate test server. I
> have them on Google Drive here:
>
> https://drive.google.com/file/d/1diZoM0Ew7Co3Yh5w5y1J-3IiBYVmUv9J/view?usp=sharing
> https://drive.google.com/file/d/1DdrD1mW36evt40a4RkeLYpx-oojmbc3z/view?usp=sharing
>
> These links should be publicly available without any sign in required.
> Please let me know if there is another preferred way of sharing test
> files and i can share it that way.
>

Also, i forgot to mention that these files have to be uploaded under a
new directory called "avif" in the fate server.

> Also for the record, these files were created by remuxing an existing
> file in the fate suite.
>
> still_image.avif - contains the first frame from
> av1-test-vectors/av1-1-b8-02-allintra.ivf
> still_image_exif.avif - contains the first frame from
> av1-test-vectors/av1-1-b8-02-allintra.ivf with dummy exif data.
>
> > Regards,
> > Gyan
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>
>
>
> --
> Vignesh



-- 
Vignesh