From: "Rémi Denis-Courmont" <remi@remlab.net>
To: <linux-media@vger.kernel.org>
Subject: UVC frame interval inconsistency
Date: Wed, 11 Apr 2012 12:27:08 +0200 [thread overview]
Message-ID: <c29fa93d58ec0a2289435bc92ac63e46@chewa.net> (raw)
Hello guys,
I have been reworking the V4L2 input in VLC and I hit what looks like a
weird bug in the UVC driver. I am using a Logitech HD Pro C920 webcam.
By default, VLC tries to find the highest possible frame rate (actually
smallest frame interval in V4L2), then the largest possible resolution at
that frame rate.
When enumerating the frame sizes and intervals on the device, the winner
is 800x600 at 30 f/s. But when setting 30 f/s with VIDIOC_S_PARM, the
system call returns 24 f/s. Does anyone know why it is so? Is this a
firmware bug or what?
--
Rémi Denis-Courmont
Sent from my collocated server
next reply other threads:[~2012-04-11 10:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-11 10:27 Rémi Denis-Courmont [this message]
2012-04-16 12:40 ` UVC frame interval inconsistency Laurent Pinchart
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