From: Sanfelici Claudio <sanfelici@pillar.it>
To: video4linux-list@redhat.com
Subject: Set Frequency Problem
Date: Mon, 22 Mar 2010 13:05:59 +0100 [thread overview]
Message-ID: <4BA75D27.10807@pillar.it> (raw)
Hello all,
it's first time I write to this mailing list, so I'm sorry if this
problem has been already discussed.
I'm writing an application in java tha use v4l2 through JNI layer (but I
have the same problem in a C test program)
When I call the VIDIOC_S_FREQUENCY the driver change the frequency, but
the video signal is 0 (according to the VIDIOC_G_TUNER) and the image is
black. I've to call some times the VIDIOC_S_FREQUENCY to get the signal on
The driver I'm using is the SAA7130.
Any ideas?
Just another question: at this time I'm working with userpointer and
read method to grab the images, but probably I will must use the video
overlay. I've tried to start the overlay following the v4l
documentation, but it doesn't work. I suspect that I must use the Xorg
library to get some information (such as the frame buffer address).
Could someone show me the way?
Thanks in advance
--
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di Sanfelici Claudio
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Sito: www.pillar.it
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next reply other threads:[~2010-03-22 12:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-22 12:05 Sanfelici Claudio [this message]
[not found] ` <9c4b1d601003220735i5af4be8bo8dc64138bb359f9b@mail.gmail.com>
[not found] ` <4BA7A993.2080008@pillar.it>
2010-03-22 18:29 ` Set Frequency Problem Adrian Pardini
2010-03-22 18:35 ` Adrian Pardini
2010-03-23 21:22 ` Sanfelici Claudio
2010-03-23 22:05 ` Adrian Pardini
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