[CLOSED] I can't debug a program that uses PasLibVLC in the IDE.

[MarkMLl]

However, if my guess (timing) is right, gdbserver might still help. Gdb reports to the IDE via pipes, that takes time (especially on Win). GdbServer talks to gdb over tcp. That may or may not make a difference.

It can also help with ownership issues. My notes say

Code: Pascal  [Select][+][-]

1. (*  *   It may be debugged by being run like                                    *)
2. (*                                                                              *)
3. (*      # gdbserver :2345 ./Watchxxx-x86_64-linux-gtk2                          *)
4. (*                                                                              *)
5. (*      with the Lazarus IDE debugger backend set to remote/gdbserver.          *)
6.  

Note that in this case any parameters should be on the command line https://bugs.freepascal.org/view.php?id=37581

Remember to switch the IDE back to ordinary gdb when done :-)

MarkMLl

[pcurtis]

So far I've tried MarkMLI's, and the program still doesn't play videos.

[MarkMLl]

So far I've tried MarkMLI's, and the program still doesn't play videos.

Which: both standalone debugger and gdbserver+IDE?

If so I think it points very much to a general libvlc problem rather than something to do with the IDE or underlying tools, and I think it's something you could usefully write up in the wiki.

MarkMLl

[MarkMLl]

I've just checked that with program using the LCL etc., and also with he main VLC binary without obvious problems although I didn't go looking for a file to play.

It would be interesting if, in fact, it's possible to run vlc under gdb but not a program using libvlc.

MarkMLl

[pcurtis]

Guys, I have been side tracked the last couple of days,
but my result is this :
PasLibVlc (at least for me), is unusable. Without out of the box debugging (solving debugging issues for one component / application is not worth the effort) it is unusable, I also found that I can't seek in .ts files (not sure if this is a VLC or PasLibVLC problem). With these issues I decided to stick with MPV.

At least the issue has been half solved and I thank you for your assistance.

I will mark this post as CLOSED not SOLVED.

[MarkMLl]

OK, but for completeness (and the benefit of anybody who gets here via Google) this appears to be something to do with libvlc, and does not highlight a fault in the Lazarus IDE or the Pascal wrapper.

MarkMLl

[Fred vS]

I can't use PasLibVlc in the IDE. When I run the exe  out of the IDE all is OK.
This goes for the demo apps or my own.

Is there a setting I am missing?

Both VLC and PasLibVlc are the latest versions.

I noted that it is extremely difficult to debug a application that deals with audio (or video + audio).
This because debugging "eats" latency with his analysis and so disturbs the flow of samples to sound card.

To resume, debug is OK to detect errors but the result in your loudspeakers may be bad.

[MarkMLl]

I noted that it is extremely difficult to debug a application that deals with audio (or video + audio).
This because debugging "eats" latency with his analysis and so disturbs the flow of samples to sound card.

OTOH I think OP's said (although he's not explicitly confirmed) that he was able to run without breakpoints set, and even though Martin makes the point that the debugger silently intercepts various events I'd not have thought it would make that much difference on a modern CPU.

MarkMLl