[FFmpeg-devel] Bounties?

[Robert Swain]

On 24 May 2007, at 13:01, Michael Niedermayer wrote:
> On Thu, May 24, 2007 at 12:35:32PM +0300, Ismail D?nmez wrote:
>> On Thursday 24 May 2007 12:18:33 Benoit Fouet wrote:
>>> Guillaume Poirier wrote:
>>>> Baptiste Coudurier wrote:
>>>>> Well, supply me an ipod (that would be the bounty) and I'll  
>>>>> make sure
>>>>> ffmpeg produce playbable files.
>>>>
>>>> Supply me an iPod, and I'll check that the patch produced by
>>>> Baptiste DOES allows to create iPod-compatible files ;o)
>>>
>>> a double check is better, i'm willing to receive an iPod too ;)
>>
>> Besides joking FFmpeg already produces iPod compatible files, once  
>> just needs
>> to add the special UUID with AtomicParsley or MP4BOX, see  
>> superdump's ueber
>> cool howto on this :
>> http://rob.opendot.cl/index.php/useful-stuff/ipod-video-guide/
>
> i do have a ipod and ffmpeg alone generates perfectly working  
> files, no need
> for any other tools
>
> so what is this UUID good for? 640x480 on a screen which has a  
> physical
> resolution of 320x240? or does apples non free itunes need that (maybe
> together with other specific features)?

The UUID atom is required for iTunes to accept the file for  
synchronisation. However, iTunes is not necessarily needed for  
synchronisation. Also, the fifth generation iPods have a TV out, so  
640x480 is useful for people who wish to use that feature.

As I recall, Baptiste wanted to write some generic atom setting  
capability for the mp4 multiplexer, rather than hacking in atoms for  
individual formats. This sounds like a good idea to me as such atom  
writing and their values could be specified in the preset.

Rob