ofVideoPlayer: opening video while still streaming data?

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#1

Hi there,

a tricky question regarding ofVideoPlayer: I’m trying to open a video fijle while still streaming TV capture data into it.
However, even if I wait a couple of seconds until the video is properly initialized, I either get gstreamer errors (“cannot seek position”) or the player shows me a “snapshot” of the video up to the point where ofVideoPlayer opened it.

Maybe this is more a gstreamer issue than an openframeworks issue…
Nevertheless, I would appreciate any help -

thanks a lot in advance,
adrian

#2

there’s a flag for streams that is only set if the name of the video is a url instead of a file, so if you’re opening a file it won’t work. you can try opening it with

file:///home/user/video.avi

or whatever the name of the video is to see what happens

also does totem plays it properly? you can also to open it with gst-launch and more or less the same pipelne that the videoplayer uses:

gst-launch-0.10 playbin uri=videofile.avi

#3

Hi,

thanks for the hints - unfortunately, I now ran into a different problem with some of regular video files (no streams).

The attached video ‘test.avi’ plays with mplayer, totem, and also with gst-launch:

gst-launch-0.10 playbin uri=file:///tmp/test.avi

When opening it with openframeworks, however, I get lots of these:

OF_WARNING: GStreamer: cannot query time duration
…
OF_ERROR: GStreamer: cannot query width and height
…

and the video does not play. Might re-encoding to a different format help here?

thanks in advance for your help!

cheers,
adrian

#4

you forgot the attachment : )

#5

grrr… sorry about that.
Anyway, I figured out that with using a local absolute path and not a URL it works.
Sorry for the confusion -

cheers,
adrian