[FFmpeg-user] How to set 3 specific metadata flags (ITU601/displayoffset) in FFmpegs IMX50 MXF-OP1a encoding?

[tim nicholson]

On 19/03/15 15:48, Christoph Gerstbauer wrote:
> 
>> Shame, don't understand the qmax issue. but if you look at:-
>>
>> tests/lavf_regression.sh line 90
>>
>> you will see an IMX30 example which uses -qmax 12 and my other other
>> parameters. However not sure what difference closed/open gop makes on I
>> frame only, but being purist I can see how you might want to set closed
>> gop! S356m makes no reference to it that I can see.
>>
>> Looks like we might need a patch for what you want.
>>
>>
> 
> In fact, the most important metadata flag is the
> 
> display y offset = 32 (high priority for patching, if possible)
> 

Having a quick scan through mxfenc.c it looks like that UL is missing,
as are some others. I have tracked them down in RP210 but am struggling
with the local_tag values at the moment.

It should be relatively straightformward to add in the relevant tag though.

> 
> Without it, some programs like GRass Valley Edius misinterpret the IMX
> files -> the VBI area is shown in the editing window:
> 
> [..]
> Best Regards
> Christoph
> [..]

-- 
Tim.
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