On Sunday 03 October 2004 10:21am, Til Schubbe wrote:
> Hi,
>
> I can't find the Videocamera Sony DCR-TRV255E in the database of
> supported devices (http://www.qbik.ch/usb/devices/). Can I use it for
> vidoestreaming?
Til,
There was a thread ('USB stream from camcorder Sony DCR-HC40(E)') on this list
which began on 23 Jul 2004 that sounds a lot like your problem.
When I first saw that thread, I tried to stream live video over my Sony
DCR-TRV38 camcorder's USB port (under Slackware 9.1, 2.4.22 kernel) but had
no luck at all. My camcorder never showed up in the 'cat /proc/bus/usb/
devices' list, just like yours and just like Luc Dijon's (see below).
Unfortunately, that thread seemed to die out after a partial success based
upon a patch from Alan Stern. Here's some of the exchange that took place:
On Friday 23 July 2004 03:55pm, Alan Stern wrote:
> From your log messages, it looks like your camcorder is one of those
> devices that wants to be initialized (that is, have its address assigned
> and be enumerated) the way Windows does it, not the way Linux does. Other
> people have run into the same sort of problem with digital cameras.
>
> Here is an experimental patch for 2.6.7. It changes the hub driver so
> that on the second attempt to initialize a device it will use the Windows
> strategy.
On Sunday 25 July 2004 11:48am, Alan Stern wrote:
> On Sun, 25 Jul 2004, Luc Dijon wrote:
> > Alan,
> > This patch seems to shake the box in the right way :-)
> > I see that the audio device is detected, but not the Video device.
> > It seems that the audio is detected twice.
> > Here is the /proc/bus/usb/devices (which is not empty now :-).
> > + the syslog.
> > Thanks very much for your support,
> >
> > Luc
>
> That's very good news. It means that patch solved the problem of your
> device not being detected and initialized. I will discuss the patch with
> other USB developers, and we'll settle on a version to submit for the
> official kernel.
>
> The questions about why the video driver isn't loaded and whether the
> audio driver is being loaded correctly can now be worked on separately.
> From your log it looks like things are happening the way they should, but
> there might be some problems in the audio/video drivers or the hotplug
> system. Maybe someone else can try to solve those.
Although I'm not that intent on using my camcorder to stream video over USB,
I'm still interested in these threads and would try to contribute (testing,
etc) if needed.
>
> Currently I'm running 2.6.9-rc2 on a Debian testing/unstable.
>
> Could someone give me a hint, if and how I can record a videostream
> using this camera, please?
>
> TIA
> Til
Since you're using a recent kernel, I'm guessing Alan's patch is not in the
latest kernel(s).
Alan... Any more thoughts on this topic? Did that thread just sort of die out?
Did any patch ever make it into the kernel? I greatly appreciate any input
you might have.
Bill Marr
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