On Mon, Sep 20, 2021 at 5:44 PM James Zern wrote:
>
> On Wed, Sep 8, 2021 at 6:46 PM James Zern wrote:
> >
> > On Mon, Aug 30, 2021 at 5:11 AM Maryla
> > wrote:
> > >
> > > When a color indexing transform with 16 or fewer colors is used,
> > > WebP uses "pixel packing", i.e. storing several pix
On Wed, Sep 8, 2021 at 6:46 PM James Zern wrote:
>
> On Mon, Aug 30, 2021 at 5:11 AM Maryla
> wrote:
> >
> > When a color indexing transform with 16 or fewer colors is used,
> > WebP uses "pixel packing", i.e. storing several pixels in one byte,
> > which virtually reduces the width of the image
On Mon, Aug 30, 2021 at 5:11 AM Maryla wrote:
>
> When a color indexing transform with 16 or fewer colors is used,
> WebP uses "pixel packing", i.e. storing several pixels in one byte,
> which virtually reduces the width of the image (see WebPContext's
> reduced_width field). This reduced_width sh
When a color indexing transform with 16 or fewer colors is used,
WebP uses "pixel packing", i.e. storing several pixels in one byte,
which virtually reduces the width of the image (see WebPContext's
reduced_width field). This reduced_width should always be used when
reading and applying subsequent
Hi,
On Thu, Aug 26, 2021 at 9:06 AM Maryla Ustarroz
wrote:
>
Note top posting is discouraged here [1].
> We've just added a file to libwebp-test-data that covers this case:
> https://chromium.googlesource.com/webm/libwebp-test-data/+/refs/heads/main/dual_transform.webp
> FFmpeg currently fails
We've just added a file to libwebp-test-data that covers this case:
https://chromium.googlesource.com/webm/libwebp-test-data/+/refs/heads/main/dual_transform.webp
FFmpeg currently fails to decode it, but it works with this patch.
My understanding is that an ffmpeg developer needs to upload the fil
On Thu, Aug 19, 2021 at 12:56 AM Maryla wrote:
>
> When a color indexing transform with 16 or fewer colors is used,
> WebP uses "pixel packing", i.e. storing several pixels in one byte,
> which virtually reduces the width of the image (see WebPContext's
> reduced_width field). This reduced_width s
When a color indexing transform with 16 or fewer colors is used,
WebP uses "pixel packing", i.e. storing several pixels in one byte,
which virtually reduces the width of the image (see WebPContext's
reduced_width field). This reduced_width should always be used when
reading and applying subsequent
