Video Doesn't Seem to Play in AllegAVI

no-reply@allegro.cc (Dale M.A. Johnson) — Sun, 19 Mar 2006 21:35:10 +0000

I'm toying around with AllegAVI and can't seem to get it to work. I've compiled the library and successfully linked it to my program, and when I load the clip, it doesn't give me any error returns. However, when I go to play the clip, it doesn't do anything, and just skips on to the next part of the program. I'm guessing I'm doing something wrong somewhere...

I've tried the demo files included with AllegAVI as well as ones of my own, but still to no avail. I'm using Visual C++ .NET Express Edition if it makes a difference...

no-reply@allegro.cc (A J) — Mon, 20 Mar 2006 01:26:58 +0000

show us the code.

i use AllegAVI and it works good.

no-reply@allegro.cc (Dale M.A. Johnson) — Mon, 20 Mar 2006 02:02:13 +0000

   AllegAVI avi;
2 
  scare_mouse();

  switch(avi.Open("video/intro.avi"))
  {
  case -1:
      allegro_message("The video file isn't there.");
      exit(1);
  case -2:
      allegro_message("The video codec appears to be missing.");
      exit(1);
  case -3:
      allegro_message("There was an error while trying to open the file.");
      exit(1);
  }
17 
  avi.Play(screen, 0, 0, true, false);
  avi.Close();

Am I not importing the clip right, or am I trying to play it the wrong way?

no-reply@allegro.cc (Oscar Giner) — Mon, 20 Mar 2006 06:00:56 +0000

It's a weird error. I'd say the same as always: "it's an old lib that uses VfW and you may not have VfW codecs", but in that case Open should fail.

Are you setting/changing the video mode after calling Open?

Do the examples work for you?
Have you tried loading your movie with example1?

no-reply@allegro.cc (Dale M.A. Johnson) — Mon, 20 Mar 2006 07:59:36 +0000

I never could get the examples to compile correctly.

And--This is wierd--On a whim, I replaced

avi.Play(screen, 0, 0, true, false);

with:

avi.PlayStart();
while (playing && !key[KEY_ENTER] && !key[KEY_ESC])
{
    playing = avi.PlayStep(screen, 0, 0, false, true);
}
avi.PlayEnd();

And... It works perfectly? Video shows up, plays sound, and everything. Doesn't make a lick of sense to me, since that's basically all avi.play did for me, right? Now I'm just confused, but it does work now, so I guess it's all good.

no-reply@allegro.cc (A J) — Mon, 20 Mar 2006 10:54:50 +0000

which version are you using ?

no-reply@allegro.cc (Dale M.A. Johnson) — Mon, 20 Mar 2006 21:02:52 +0000

AllegAVI 1.2

1	AllegAVI avi;
2
3	scare_mouse();
4
5	switch(avi.Open("video/intro.avi"))
6	{
7	case -1:
8	allegro_message("The video file isn't there.");
9	exit(1);
10	case -2:
11	allegro_message("The video codec appears to be missing.");
12	exit(1);
13	case -3:
14	allegro_message("There was an error while trying to open the file.");
15	exit(1);
16	}
17
18	avi.Play(screen, 0, 0, true, false);
19	avi.Close();