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)
Without it, some programs like GRass Valley Edius misinterpret the IMX files ->
the VBI area is shown in the editing window:
https://dl.dropboxusercontent.com/u/26129407/FFMPEGIMX.png
Adobe premiere does not care about that, it always displays it correct.
I tested the same GRASS VALLEY programm with a carbon generated IMX file:
https://dl.dropboxusercontent.com/u/26129407/CARBONIMX.png
It works.
Best Regards
Christoph
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