From: Ming Liu <mliu@migmasys.com>
To: video4linux-list@redhat.com
Subject: a multichannel capture problem
Date: Mon, 08 Sep 2008 17:09:33 -0400 [thread overview]
Message-ID: <48C5948D.5030504@migmasys.com> (raw)
In-Reply-To: <20080908160012.574456184D5@hormel.redhat.com>
Hello,
As a newbie in V4L2, I am trying to capture two video channels
simultaneously (we can live with about 0.05s difference between two
channels). Currently, I am using PV-143 (a cheap card with one bt878
chip). After some research, I found:
1. bt878 can only handle one channel at one time, so I will not be able
to reach a speed higher than 15 frames/second per channel.
2. Since I can not synchronize the two cameras, I will have much lower
frame rate if I try to switch between two channels.
My problems are:
1. Is there any example codes that I can follow to estimate the frame
rates using switch channel approach? Can I do this by using standard
V4L2 APIs, or I will need to deal with the driver?
2. If I choose a multi-chip PCI based video capture card, is there any
limit from the bandwidth? Are there any sample codes available?
3. In the program point of view, is there difference between using
multi-chip card and several single chip cards?
Thank you in advance.
Sincerely yours
Ming
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next parent reply other threads:[~2008-09-08 21:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080908160012.574456184D5@hormel.redhat.com>
2008-09-08 21:09 ` Ming Liu [this message]
2008-09-09 16:05 ` a multichannel capture problem Ming Liu
2008-09-09 19:07 ` Daniel Glöckner
2008-09-09 19:51 ` Ming Liu
2008-09-30 8:25 ` Vinicius Kamakura
2008-09-30 12:12 ` Daniel Glöckner
2008-10-01 18:27 ` Vinicius Kamakura
2008-10-01 19:46 ` Daniel Glöckner
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