[FFmpeg-devel] [PATCH] mov auto crop

Baptiste Coudurier baptiste.coudurier
Sat Oct 2 22:01:43 CEST 2010

On 10/2/10 10:15 AM, Aurelien Jacobs wrote:
> On Sat, Oct 02, 2010 at 02:57:43PM +0200, Benjamin Larsson wrote:
>> On 10/02/2010 04:51 AM, Baptiste Coudurier wrote:
>>> Hi guys,
>>> $subject.
>>> Please keep in mind that this issue has been present for _years_ and
>>> nobody dared to fix it. I believe the patch is not so hackish/ugly.
>>> I restrict it to codecs not supporting arbitrary resolutions that can be
>>> stored in .mov by quicktime.
>>> Maybe exporting to "crop", "wxh" is better, I don't know.
>>> I plan to add auto-rotate for iphone 3gs files this way as well :)
>> Jolly good. But would it be possible to move this code to the api and
>> just not in the ffmpeg commandline tool?
> I agree. Before this patch is committed, I would like to see a proper
> API patch, whether it is by documenting the metadata API or by adding
> some fields to the AVFormatContext struct.
> After we have a clean and documented API for this, it will be trivial
> and un-controversial to use this API in any muxer/demuxer and tools
> including all the API users which are not part of the FFmpeg repository.
> I have to say that I don't like much the use of the metadata API for
> this. I forces every existing applications to filter out metadata before
> copying them to a transcoded file (which might have been resized, so the
> cropping values don't make any sens anymore). So in some way, it kind of
> break current public API...

You are being unreasonable IMHO. No it doesn't break the current public
I already said that blindly copying metadata from one container to
another is a _bad_ idea and we should not do it.

Feel free to add another field in AVFormatContext if you want, but I
won't do it.

Btw, when are we going to have cover art support in svn ? I mean I've
had a patch using AVMetadata since January.

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