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<p class=MsoNormal>Hello everyone,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am attempting to stream frames that are generated live via
OpenGL and compressed into MPEG2 Video frames. I have created a class which
inherits from FramedSource and that class overrides doGetNextFrame(). I have
also created a function called deliverFrame() that is called by
doGetNextFrame() when a new frame is available. deliverFrame() copies the
compressed image into fTo and then calls FramedSource::afterGetting() (I’m
a bit confused as to how I should use the fDurationInMicroseconds and
fPresentationTime because the images do not occur at regular time intervals).
My problem is that when I try to view my stream using VLC I get only one or two
frames across before VLC stops updating. The two frames I get are not one right
after another but rather one and then a few seconds later another one, after
that VLC is stuck showing that frame. VLC does not freeze but it doesn’t
keep up with the streaming frames. If I press stop and play (or rewind or
fastforward) on VLC then I get one or two frames and the same thing happens
again. I have looked at the log for VLC and for the most part it says ‘Buffering
0%’. Sometimes it will say:<o:p></o:p></p>
<p class=MsoNormal><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:darkblue'><o:p> </o:p></span></i></p>
<p class=MsoNormal><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:darkblue'>libmpeg2</span></i><i><span style='font-size:12.0pt;font-family:
"Times New Roman","serif";color:red'> error: </span></i><span style='font-size:
12.0pt;font-family:"Times New Roman","serif";color:black'>DpbUnlinkPicture
called on an invalid picture</span><span style='font-size:12.0pt;font-family:
"Times New Roman","serif"'><o:p></o:p></span></p>
<p class=MsoNormal><i><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:darkblue'>main</span></i><i><span style='font-size:12.0pt;font-family:
"Times New Roman","serif";color:green'> warning: </span></i><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:black'>backward_pts
!= current_pts (-12913336635)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>but that message is rare. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>I am using the ‘testMPEG4VideoStreamer.cpp’ file for
initializing all my stuff, the only difference is that I am using my derived
FramedSource in the play() function. Any thoughts as to why this might be
happening? Thanks in advance for your help.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:black'>Dillon</span><o:p></o:p></p>
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