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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>All,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I posted this in the VideoLAN forums without any response. I'm
trying to use VLC as part of a video snapshot tool but am experiencing problems
with VLC snapshots. In particular, I'm experiencing problems when trying to
take a snapshot of MPEG4 multicast video from an Optelecom hardware encoder. I
use an SDP file to define each video stream/connection information. The problem
is that VLC will occasionally save the wrong snapshot image to a file.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'><br>
For example, here's a typical setup that I use via telnet before starting any
snapshots:<o:p></o:p></span></font></p>
<p class=MsoNormal><code><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>new cam172_30_28_33 broadcast loop enabled</span></font></code><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_33
input etc/camera_configs/cam172_30_28_33.sdp</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_33
option vout=image</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_33
option image-out-format=jpeg</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_33
option image-out-prefix=/home/vlc/snapshots/cam172_30_28_33</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_33
option image-out-ratio=150</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_33
option image-out-replace</span></font></code><br>
<br>
<code><font face=Arial><span style='font-family:Arial'>new cam172_30_28_36
broadcast loop enabled</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_36
input etc/camera_configs/cam172_30_28_36.sdp</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_36
option vout=image</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_36
option image-out-format=jpeg</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_36
option image-out-prefix=/home/vlc/snapshots/cam172_30_28_36</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_36
option image-out-ratio=150</span></font></code><br>
<code><font face=Arial><span style='font-family:Arial'>setup cam172_30_28_36
option image-out-replace</span></font></code><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><br>
<br>
I then have a loop in my application, that communicates to VLC via telnet, that
starts one camera, then stops it, then starts the other, stops the other, and
continues in this loop forever. VLC will occasionally save the snapshot from
the 172.30.28.33 encoder as cam172_30_28_36.jpeg. I've read through the SDP
specification so that should be correct. <br>
<br>
My application (written in Java) runs on Debian and connects to VLC 0.8.6a. <br>
<br>
Anyone else have similar experiences or suggestions?<br>
<br>
Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Dave Irwin<o:p></o:p></span></font></p>
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