[FFmpeg-devel] [RFC] set up targets for xdcam

[Dave Rice]

On Jun 27, 2014, at 6:21 AM, Gaullier Nicolas <nicolas.gaullier at arkena.com> wrote:

>> De : ffmpeg-devel-bounces at ffmpeg.org [mailto:ffmpeg-devel-bounces at ffmpeg.org] De la part de Derek Buitenhuis
>> Envoyé : mercredi 11 juin 2014 19:24
>> On 6/11/2014 6:22 PM, Dave Rice wrote:
>>> Hi,
>>> I was going to work on setting up targets for xdcam and imx formats. Since there are so many possibilities, particularly for xdcam, I was considering making one target per fourcc. Any comments on this approach before I >continue?
>> 
>> Have you checked how FFmbc does it?
>> 
>> - Derek
>> 
> 
> +1
> 
> I think FFMBC's way is a good start.
> - framerate specified as usual with -r
> - interlaced specified as usual with -tff
> - everything else (including chroma and bitrate) comes from the target name
> 
> Enhancements:
> - Fourcc/-vtag should be set by the template (ffmbc set the vtags for imx but fail to set them for xdcamhd)
> - Aspect-Ratio must be set to 16/9 for HD and a warning raised if not 4/3 nor 16/9 for SD.
> 
> At the end, a target would be rather represent a family of fourcc rather than a unique fourcc.
> Target names would be : imx30, imx40, imx50, xdcamhd422 (ie. the 50Mb/s variant, all other variants are becoming rare nowadays, I don't know if you intend to include them)

I had started including all of the xdcam variants but the results became too ugly. I think the approach of only focusing on the 50Mb/s variants is good. I'll should have some time to finish this over the weekend.
Dave Rice