From: Sakari Ailus <sakari.ailus@iki.fi>
To: Paulo Assis <pj.assis@gmail.com>
Cc: "Rémi Denis-Courmont" <remi@remlab.net>,
"Grazvydas Ignotas" <notasas@gmail.com>,
"Linux Media Mailing List" <linux-media@vger.kernel.org>,
"Laurent Pinchart" <laurent.pinchart@ideasonboard.com>,
"Hans Verkuil" <hans.verkuil@cisco.com>,
"Mauro Carvalho Chehab" <mchehab@redhat.com>
Subject: Re: (bisected) Logitech C920 (uvcvideo) stutters since 3.9
Date: Wed, 05 Nov 2014 01:32:54 +0200 [thread overview]
Message-ID: <54596226.8040403@iki.fi> (raw)
In-Reply-To: <20141104153650.GO3136@valkosipuli.retiisi.org.uk>
Sakari Ailus wrote:
> yavta does, for example, print both the monotonic timestamp from the buffer
> and the time when the buffer has been dequeued:
>
> <URL:http://git.ideasonboard.org/yavta.git>
>
> $ yavta -c /dev/video0
>
> should do it. The first timestamp is the buffer timestamp, and the latter is
> the one is taken when the buffer is dequeued (by yavta).
Removing the uvcvideo module and loading it again with trace=4096 before
capturing, and then kernel log would provide more useful information.
--
Sakari Ailus
sakari.ailus@iki.fi
next prev parent reply other threads:[~2014-11-04 23:32 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-02 2:03 (bisected) Logitech C920 (uvcvideo) stutters since 3.9 Grazvydas Ignotas
2014-11-02 22:57 ` Sakari Ailus
2014-11-03 23:16 ` Grazvydas Ignotas
2014-11-04 11:58 ` Sakari Ailus
2014-11-04 12:42 ` Rémi Denis-Courmont
2014-11-04 15:02 ` Paulo Assis
2014-11-04 15:36 ` Sakari Ailus
2014-11-04 23:32 ` Sakari Ailus [this message]
2014-11-05 10:13 ` Paulo Assis
2014-11-05 14:05 ` Laurent Pinchart
2014-11-05 22:29 ` Paulo Assis
2014-11-05 16:11 ` Sakari Ailus
2014-11-05 16:12 ` [RFC 1/2] uvc: Add a quirk flag for cameras that do not produce correct timestamps Sakari Ailus
2014-11-05 16:12 ` [RFC 2/2] uvc: Use UVC_QUIRK_BAD_TIMESTAMP quirk flag for Logitech C920 Sakari Ailus
2015-11-09 16:18 ` [RFC 1/2] uvc: Add a quirk flag for cameras that do not produce correct timestamps Laurent Pinchart
2014-12-05 14:58 ` (bisected) Logitech C920 (uvcvideo) stutters since 3.9 Laurent Pinchart
2014-11-04 20:41 ` Rémi Denis-Courmont
2014-11-05 14:05 ` Laurent Pinchart
2014-11-05 22:29 ` Grazvydas Ignotas
2014-11-17 15:36 ` Grazvydas Ignotas
2014-11-18 8:39 ` Hans Verkuil
2014-12-05 11:46 ` Laurent Pinchart
2014-12-06 0:25 ` Grazvydas Ignotas
2014-12-07 19:23 ` Laurent Pinchart
2014-12-07 21:23 ` Grazvydas Ignotas
2015-03-29 20:59 ` Milos Ivanovic
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