is it possible your camera is capturing at 29.996 fps instead of 30 and pix_video still is capturing them as 30 or something similar?<div>is it a dv compressed camera?<br><div>could you measure the frequency of the black/white frames?</div>
<div><br></div><div>J<br><br><div class="gmail_quote">On Mon, Mar 22, 2010 at 1:54 AM, IOhannes m zmoelnig <span dir="ltr"><<a href="mailto:zmoelnig@iem.at">zmoelnig@iem.at</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
On 2010-03-22 09:48, Matteo Sisti Sette wrote:<br>
<div class="im">> IOHannes wrote:<br>
><br>
> I tried [print]ing the output from the 7th outlet, whose function is not<br>
> quite clear in the help patch: "list <newimage> <newfilm>". I guessed<br>
> either <newimage> or <newfilm> _may_ be a boolean meaning whether the<br>
> image is new (or the film, whatever it is), but even if I set the gemwin<br>
> at 30 or 50 fps, I _always_ get "1 0", and I don't think my webcam<br>
> captures 50 fps.......<br>
><br>
<br>
<br>
</div>that would have been the hint<br>
<br>
there are two possibilities why this is happening:<br>
- there is a bug in Gem that doesn't mark the images as "old" (was this<br>
on w32 or osx?)<br>
- there is a "bug" in the image acquisition backend (DirectShow,<br>
QuickTime,...) that just serves the same image twice as if it were new.<br>
<br>
<br>
in the former case, we can fix it.<br>
in the latter case we won't.<br>
<br>
of course you can use the "black" image to detect whether the same image<br>
was captured twice.<br>
<br>
fgasdr<br>
<font color="#888888">IOhannes<br>
<br>
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