[FFmpeg-devel] Select the right format

Mark Himsley mark at mdsh.com
Tue Nov 27 23:17:48 CET 2012

On 27/11/2012 00:21, Michael Niedermayer wrote:
> On Sun, Nov 25, 2012 at 04:41:12PM +0000, Mark Himsley wrote:
>> Suppose I wanted to add more 8 bit YUV formats to be accepted by the
>> overlay filter.
>> I don't see how I can do it right now.
>> Because, for YUV, the MAIN and OVERLAY inputs have to match:
>>  yuv420p (or yuva420p [1]) on the MAIN with yuva420p on the OVERLAY
>> I want to add:
>>  yuv422p (or yuva422p) on the MAIN with yuva422p on the OVERLAY
>>  yuv444p (or yuva444p) on the MAIN with yuva444p on the OVERLAY
>> The only way I can see to enable those is to pass a 'format' argument to
>> the overlay filter.
>> Can anyone think of a more elegant method, before I start coding a
>> 'format' argument method?
> MAIN == OUTPUT and supports all you want
> OVERLAY supports all you want
> if you get a OVERLAY type that cannot directly be used with what MAIN
> is set to then insert / call scale to convert

Thanks for this alternate idea. Is there an example of inserting a scale
filter from another?


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