Re^2: Using Wx::MediaCtrl to display a live videofeed (eg a webcam)

Hi Anon,

Thanks for this. I didn't have LogWindow installed, so I just did that and I get:

21:56:14: Error: gst_error_callback
Error Message:Invalid URI "/dev/video0".
Debug:gstplaybasebin.c(1666): gen_source_element (): /GstPlayBin:play
 (error 0: Success)
21:56:14: Error: wxGStreamerMediaBackend::Load - Could not set initial
+ state to ready (error 0: Success)
[download]

I guess it doesn't like the /dev/video0. Maybe it really expects a URL, but assuming it means a URI, then should I just put my computer name in front of it like this? steve-desktop/dev/video0 because that doesn't work either.

Do you know what format is correct?

Thanks and regards

Steve.

PS I tried the strace, but it gave me pages and pages of info. I'll have a go at filtering it down, and post it here.

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Re^3: Using Wx::MediaCtrl to display a live videofeed (eg a webcam) by Anonymous Monk on Jul 21, 2010 at 02:35 UTC
`$ perl -MURI::file -le"die URI::file->new( shift )->canonical " /dev/v +ideo0 file:///dev/video0` [download]	[reply] [d/l]
Re^4: Using Wx::MediaCtrl to display a live videofeed (eg a webcam) by Steve_BZ (Chaplain) on Aug 03, 2010 at 01:15 UTC
Hi Monks, Well, I've now rebuilt the hardware and everything is cookin' nicely. I tried `$i_frame->{Ctl_Videos_Media}->LoadURI ('file:///dev/video0');` and I no longer get any errors in LogWindow but no picture in the media control. Update: Oookaaay, now my hardware is compliant with that age-old standard of plugging the webcam in, we have some progress! The progress bar on the application flickers (although not the image) and `print $i_frame->{Ctl_Videos_Media}->LoadURI ('file:///dev/video0');` returns "1" but gives error Gtk-CRITICAL : gtk_range_set_range: assertion `min < max' failed, so I guess it is accessing the URI, but maybe it is immediately hitting EOF, or something. Update 2:** According to Similar wxPython problem it may be missing GStreamer packages. This sounds like a possibility, so I'm going to try to track this down. If you know what the correct list is, please share :) Regards Steve.	[reply] [d/l] [select]
Re^5: Using Wx::MediaCtrl to display a live videofeed (eg a webcam) by Steve_BZ (Chaplain) on Aug 06, 2010 at 13:20 UTC
Hi Guys, Well I've tried all the GStreamer packages where they are mutually compatible, and in different combinations where they are not. Videos play nicely, URI's don't. Regards Steve	[reply]