linux-kernel - Re: [PATCH v5 00/39] i.MX Media Driver

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Date:   Sat, 18 Mar 2017 20:43:24 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Steve Longerbeam <steve_longerbeam@...tor.com>
Cc:     Steve Longerbeam <slongerbeam@...il.com>, robh+dt@...nel.org,
        mark.rutland@....com, shawnguo@...nel.org, kernel@...gutronix.de,
        fabio.estevam@....com, mchehab@...nel.org, hverkuil@...all.nl,
        nick@...anahar.org, markus.heiser@...marIT.de,
        p.zabel@...gutronix.de, laurent.pinchart+renesas@...asonboard.com,
        bparrot@...com, geert@...ux-m68k.org, arnd@...db.de,
        sudipm.mukherjee@...il.com, minghsiu.tsai@...iatek.com,
        tiffany.lin@...iatek.com, jean-christophe.trotin@...com,
        horms+renesas@...ge.net.au, niklas.soderlund+renesas@...natech.se,
        robert.jarzmik@...e.fr, songjun.wu@...rochip.com,
        andrew-ct.chen@...iatek.com, gregkh@...uxfoundation.org,
        shuah@...nel.org, sakari.ailus@...ux.intel.com, pavel@....cz,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org
Subject: Re: [PATCH v5 00/39] i.MX Media Driver

On Sat, Mar 18, 2017 at 12:58:27PM -0700, Steve Longerbeam wrote:
> Can you share your gstreamer pipeline? For now, until
> VIDIOC_ENUM_FRAMESIZES is implemented, try a pipeline that
> does not attempt to specify a frame rate. I use the attached
> script for testing, which works for me.

It's nothing more than

  gst-launch-1.0 -v v4l2src ! <any needed conversions> ! xvimagesink

in my case, the conversions are bayer2rgbneon.  However, this only shows
you the frame rate negotiated on the pads (which is actually good enough
to show the issue.)

How I stumbled across though this was when I was trying to encode:

 gst-launch-1.0 v4l2src device=/dev/video9 ! bayer2rgbneon ! \
	videoconvert ! x264enc speed-preset=1 ! avimux ! \
	filesink location=test.avi

I noticed that vlc would always say it was playing the resulting AVI
at 30fps.

-- 
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