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SubjectRe: [PATCH v5 00/39] i.MX Media Driver
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On Sat, 2017-03-18 at 12:58 -0700, Steve Longerbeam wrote:
>
> On 03/18/2017 12:22 PM, Russell King - ARM Linux wrote:
> > Hi Steve,
> >
> > I've just been trying to get gstreamer to capture and h264 encode
> > video from my camera at various frame rates, and what I've discovered
> > does not look good.
> >
> > 1) when setting frame rates, media-ctl _always_ calls
> > VIDIOC_SUBDEV_S_FRAME_INTERVAL with pad=0.

To allow setting pad > 0:
https://patchwork.linuxtv.org/patch/39348/

> > 2) media-ctl never retrieves the frame interval information, so there's
> > no way to read it back with standard tools, and no indication that
> > this is going on...
>
> I think Philipp Zabel submitted a patch which addresses these
> in media-ctl. Check with him.

To read back and propagate the frame interval:
https://patchwork.linuxtv.org/patch/39349/
https://patchwork.linuxtv.org/patch/39351/

regards
Philipp

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