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| Allegro video addon |
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Kamil Biały
Member #15,049
April 2013
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Hi! I have a little problem ( at least I think so ), so... I have no idea how to play video with allegro video streaming addon. I try something like this. 1#include <stdio.h>
2#include <allegro5/allegro.h>
3#include <allegro5/allegro_audio.h>
4#include <allegro5/allegro_acodec.h>
5#include <allegro5/allegro_video.h>
6
7int main(int argc, char **argv){
8
9 ALLEGRO_DISPLAY *display = NULL;
10 ALLEGRO_MIXER *mixer = NULL;
11 ALLEGRO_VIDEO *video = NULL;
12 ALLEGRO_BITMAP *bitmap = NULL;
13 int x = 0;
14
15 if(!al_init()) {
16 fprintf(stderr, "failed to initialize allegro!\n");
17 return -1;
18 }
19
20 al_install_audio( );
21 al_init_acodec_addon( );
22
23 mixer = al_create_mixer(44100, ALLEGRO_AUDIO_DEPTH_FLOAT32, ALLEGRO_CHANNEL_CONF_2);
24 video = al_open_video("video.ogg");
25 al_set_new_bitmap_flags( ALLEGRO_VIDEO_BITMAP );
26 bitmap = al_create_bitmap( al_get_video_width( video ), al_get_video_height( video ) );
27
28 display = al_create_display(al_get_video_width( video ), al_get_video_height( video ));
29 if(!display) {
30 fprintf(stderr, "failed to create display!\n");
31 return -1;
32 }
33
34
35 al_clear_to_color(al_map_rgb(0,0,0));
36
37 al_flip_display();
38 al_start_video(video,mixer);
39 /*
40 for( x = 0; x < 100; ++x )
41 {
42 bitmap = al_get_video_frame(video);
43
44 printf("%d", al_get_video_position(video, 0));
45 }
46 */
47 bitmap = al_get_video_frame( video );
48 al_draw_bitmap( bitmap, 0, 0, 0 );
49
50 al_rest( 5.0 );
51
52 al_destroy_display(display);
53 al_destroy_mixer( mixer );
54 al_destroy_bitmap( bitmap );
55 al_close_video( video );
56
57 return 0;
58}
But when i try to draw bitmap, it flush me an error to console: 1Assertion failed: bitmap, file C:\allegro\src\bitmap_draw.c, line 137
2
3This application has requested the Runtime to terminate it in an unusual way.
4Please contact the application's support team for more information.
5
6Process returned 3 (0x3) execution time : 9.499 s
7Press any key to continue.
Please, help. |
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SiegeLord
Member #7,827
October 2006
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That should work, I think. Try opening the video (we really should rename it to load_video) after you create the display. Also, check to make sure your video is loaded fine (al_open_video will return NULL if not). "For in much wisdom is much grief: and he that increases knowledge increases sorrow."-Ecclesiastes 1:18 |
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Kamil Biały
Member #15,049
April 2013
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It doesn't work. I try to add image addon, but it doesn't help... |
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SiegeLord
Member #7,827
October 2006
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Looks like the first couple frames are NULL for whatever reason... just trudge along until you get a non-NULL one. Another couple of things about your code... you are leaking memory when you create the bitmap yourself... you don't need to do that, al_get_video_frame handles the bitmap it returns automatically. Along the same lines, do not call al_destroy_bitmap on the bitmap returned by al_get_video_frame. Lastly, you don't need to create a default mixer unless you really have to. You can get a default one via al_get_default_mixer(). Your mixer wasn't working anyway as you didn't attach it to a voice. Here's the fixed code if you want to try it: 1#include <stdio.h>
2#include <allegro5/allegro.h>
3#include <allegro5/allegro_audio.h>
4#include <allegro5/allegro_video.h>
5
6int main(int argc, char** argv)
7{
8 ALLEGRO_DISPLAY* display = NULL;
9 ALLEGRO_VIDEO* video = NULL;
10 ALLEGRO_BITMAP* bitmap = NULL;
11 int x = 0;
12
13 if(!al_init())
14 {
15 fprintf(stderr, "failed to initialize allegro!\n");
16 return -1;
17 }
18
19 al_install_audio();
20 al_reserve_samples(1);
21
22 display = al_create_display(al_get_video_width(video), al_get_video_height(video));
23
24 if(!display)
25 {
26 fprintf(stderr, "failed to create display!\n");
27 return -1;
28 }
29
30 al_clear_to_color(al_map_rgb(0, 0, 0));
31 al_flip_display();
32
33 video = al_open_video("video.ogg");
34 al_start_video(video, al_get_default_mixer());
35
36 for(x = 0; x < 100; ++x)
37 {
38 bitmap = al_get_video_frame(video);
39
40 if(bitmap)
41 al_draw_bitmap(bitmap, 0, 0, 0);
42 else
43 printf("NULL\n");
44
45 printf("%f\n", al_get_video_position(video, 0));
46 al_flip_display();
47 al_rest(0.01);
48 }
49
50 al_destroy_display(display);
51 al_close_video(video);
52 return 0;
53}
"For in much wisdom is much grief: and he that increases knowledge increases sorrow."-Ecclesiastes 1:18 |
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Kamil Biały
Member #15,049
April 2013
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It... works! Wow Thank you for help |
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