Date: Sun, 14 Feb 2010 14:44:13 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: Jan Henrik Sylvester <me@janh.de> Cc: multimedia-list freebsd <freebsd-multimedia@freebsd.org> Subject: Re: DVB-T with Cuse4BSD: bad signal quality Message-ID: <201002141444.13674.hselasky@c2i.net> In-Reply-To: <4B77FC79.5040106@janh.de> References: <4B77FC79.5040106@janh.de>
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On Sunday 14 February 2010 14:36:57 Jan Henrik Sylvester wrote: > After I tried video4bsd last weekend for the first time and was able to > make my webcam work, but not my DVB-T device. This weekend, I found > Cuse4BSD on your homepage replacing video4bsd. > > Now my DVB-T stick basically work. Thanks a lot for all your effort! > > I wanted to complain about the firmware path being /, but since you > added the '-f' switch that comes down to the rather unimportant default > being / and not -- for example -- /boot/modules/. Having to call webcamd > twice, once to load the firmware and once to actually do its job is a > little counter intuitive. > > My major problem at the moment is the quality of the signal. That has > always been dependent on the location of the antenna in my apartment, > but I just tried Raaf's dvbusb driver under FreeBSD 7 without having any > distortions and immediately booted back into FreeBSD 8: The distortions > are so high that it is unwatchable and after a few seconds audio and > video are out of sync using Raaf's typhony (Kaffeine seems a little > better at keeping the streams at sync even with a bad signal). > > I already checked the system load on my atom based system: 15% user, 10% > system, 70% idle (8% python, 8% mplayer, 4% webcamd) or 15% user, 20% > system, 60% idle (20% kaffeine, 7% webcamd, 5% Xorg) -- that does not > seem problematic. (I thought with the driver now partially in user space > there might be higher load than before due to context switching.) > > I am currently on FreeBSD 8.0-RELEASE with the libusb patch you > advertised last week on your homepage. I would not like to bring my atom > based system to 8-STABLE or 9-CURRENT. Would that help? > > Any idea or fix for my distortions? It might be that the Linux driver is setting up to small buffers. I have some patches for some of the V4L drivers, but not all. What is the VID+PID of your device? usbconfig -u X -a Y dump_device_desc --HPS
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