From: Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
To: Jean-Francois Moine <moinejf@free.fr>
Cc: linux-media@vger.kernel.org
Subject: Re: [PATCH/RFC v2 3/4] gspca: sonixj: Add V4L2_CID_JPEG_COMPRESSION_QUALITY control support
Date: Sat, 14 Jan 2012 21:07:01 +0100 [thread overview]
Message-ID: <4F11E065.8080509@gmail.com> (raw)
In-Reply-To: <20120114192414.05ad2e83@tele>
On 01/14/2012 07:24 PM, Jean-Francois Moine wrote:
>
> Setting the JPEG quality in sonixj has been removed when automatic
> quality adjustment has been added (git commit b96cfc33e7). At this
> time, I let the JPEG get function, but it could have been removed as
> well: I don't think the users are interested by this quality, and the
> applications may find it looking at the quantization tables of the
> images.
>
> Otherwise, letting the users/applications to set this quality is
> dangerous: if the quality is too high, the images cannot be fully
> transmitted because their size is too big for the USB 1.1 channel.
>
> So, IMO, you should let the sonixj as it is, and I will remove the
> get_jepgcomp.
I see, indeed the quantization tables provide much more precise
information. I've dropped the sonixj patch from the series then.
--
Thanks,
Sylwester
next prev parent reply other threads:[~2012-01-14 20:07 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-12 19:46 [RFC] JPEG encoders control class Sylwester Nawrocki
2011-11-26 18:43 ` Sakari Ailus
2011-11-26 20:59 ` Sylwester Nawrocki
2011-11-28 12:20 ` Hans Verkuil
2011-11-28 12:51 ` Sylwester Nawrocki
2011-11-28 18:48 ` Luca Risolia
2011-11-29 17:53 ` Jean-Francois Moine
2011-12-27 19:43 ` [RFC/PATCHv1 0/4] JPEG codecs " Sylwester Nawrocki
2011-12-27 19:43 ` [PATCH 1/4] V4L: Add JPEG compression " Sylwester Nawrocki
2011-12-30 21:42 ` Sakari Ailus
2011-12-31 11:54 ` Sylwester Nawrocki
2011-12-27 19:43 ` [PATCH 2/4] V4L: Add the JPEG compression control class documentation Sylwester Nawrocki
2011-12-27 19:43 ` [PATCH 3/4] gspca: sonixj: Add V4L2_CID_JPEG_COMPRESSION_QUALITY control support Sylwester Nawrocki
2011-12-27 19:43 ` [PATCH 4/4] gspca: zc3xx: " Sylwester Nawrocki
2012-01-06 18:14 ` [PATCH/RFC v2 0/4] JPEG codecs control class Sylwester Nawrocki
2012-01-06 18:14 ` [PATCH/RFC v2 1/4] V4L: Add JPEG compression " Sylwester Nawrocki
2012-01-06 18:14 ` [PATCH/RFC v2 2/4] V4L: Add JPEG compression control class documentation Sylwester Nawrocki
2012-01-06 18:14 ` [PATCH/RFC v2 3/4] gspca: sonixj: Add V4L2_CID_JPEG_COMPRESSION_QUALITY control support Sylwester Nawrocki
2012-01-14 8:47 ` Jean-Francois Moine
2012-01-14 17:42 ` Sylwester Nawrocki
2012-01-14 18:24 ` Jean-Francois Moine
2012-01-14 19:35 ` [PATCH/RFC v3 0/3] JPEG codecs control class Sylwester Nawrocki
2012-01-14 19:35 ` [PATCH/RFC v3 1/3] V4L: Add JPEG compression " Sylwester Nawrocki
2012-01-14 19:35 ` [PATCH/RFC v3 2/3] V4L: Add JPEG compression control class documentation Sylwester Nawrocki
2012-01-14 19:35 ` [PATCH/RFC v3 3/3] gspca: zc3xx: Add V4L2_CID_JPEG_COMPRESSION_QUALITY control support Sylwester Nawrocki
2012-01-14 19:53 ` [PATCH/RFC v4 " Sylwester Nawrocki
2012-01-21 14:45 ` Sylwester Nawrocki
2012-01-25 11:49 ` Jean-Francois Moine
2012-01-14 20:07 ` Sylwester Nawrocki [this message]
2012-01-06 18:14 ` [PATCH/RFC v2 4/4] " Sylwester Nawrocki
2012-01-14 8:47 ` Jean-Francois Moine
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