[FFmpeg-user] ffmpeg in After Effects / AVID / IMX30 broadcasting environment

[Baptiste Coudurier]

Hi Christian,

On 04/28/2011 06:43 PM, christian fafard wrote:
> 
> Hi,
>  
> Is there a way to change the value of the metadata 'minor_version' when encoding a file?
> The first thing that comes to mind is -metadata minor_version="xxx" but it's not working.
> This value seems to be set automatically by ffmpeg.
>  
> Quicktime movie files created by AVID or after effects have a typical metadata block like this,
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'avid.mov':
>   Metadata:
>     major_brand     : qt
>     minor_version   : 537199360
>     compatible_brands: qt
>     creation_time   : 2011-04-21 17:47:25
>  
> and are imported in AVID correctly.
>  
>  
> ffmpeg encoded files give this
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'testout.mov':
>   Metadata:
>     major_brand     : qt
>     minor_version   : 512
>     compatible_brands: qt
>     creation_time   : 1970-01-01 00:00:00
>     encoder         : Lavf52.106.0
>  
> I'm pretty sure that this value of 512 is what's preventing an AVID system from
> importing correctly an ffmpeg encoded IMX30(D10) video file.
> Because once the good file re-wrap with a command line like this,
> ffmpeg -i avid.mov -metadata minor_version="537199360" -vcodec copy -acodec copy testout.mov.
> the minor_version field reset to 512 and the file doesn't get imported correctly.

Unfortunately it's more complicated than that. This won't work out of
the box because AVID uses some particular info in the .mov file that
AVID expects. FFmpeg does not recreate these currently.

-- 
Baptiste COUDURIER
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