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

Christoph Gerstbauer christophgerstbauer at gmail.com
Fri Mar 20 19:29:40 CET 2015

Am 20.03.2015 um 16:21 schrieb tim nicholson:
> On 20/03/15 09:19, tim nicholson wrote:
>> 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.
> Attached is a quick hack that worked for me. Do you want to give it a  spin?
Hello Tim, thank you!

I have to wait for next week when I am in the office because I am not 
able to apply this patch (I have no expierience in doing that ;). A 
collegue of mine is able to compile. . I am just working with ffmpeg 
.exe files.

Best Regards

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