[FFmpeg-devel] [PATCH] webp: add support for EXIF metadata chunks

James Zern jzern at google.com
Mon Jan 13 20:42:46 CET 2014

On Mon, Jan 13, 2014 at 11:37 AM, James Almer <jamrial at gmail.com> wrote:
> On 13/01/14 8:22 AM, Thilo Borgmann wrote:
>> Am 13.01.14 05:37, schrieb James Almer:
>>> [...]
>> Nobody argued about it in mjpegdec.c and I do not know what bytestream2 does
>> internally, but I could imagine a byte alignement could be of use here. Check
>> with the specification, maybe it is good as it is, I'm not sure.
>> Looks good to me otherwise - but I have no way to compile & run it right now.
>> -Thilo
> The WebM spec doesn't mention anything beyond "Exif metadata goes inside an
> EXIF chunk, of which there should be no more than one", and the files i
> created with libwebp worked as it is.

The only thing worth noting is that the chunk might be padded by one
byte to satisfy RIFF constraints regarding odd sizes.

> I also don't see any kind of alignment function from bytestream2 like there
> is for getbits.

More information about the ffmpeg-devel mailing list