有没有办法在 pygame 中一次播放多个 mp3 文件？

Question

I'm trying to play 2 mp3 files, but every time the other one plays, the first one stops. Whenever I use channel, the game ends up crashing.

Here is my code:

pygame.mixer.music.load('music.mp3')
pygame.mixer.music.play(-1)
#insert generic if statement here
pygame.mixer.music.load("differentmusic.mp3')
pygame.mixer.music.play()

is there any way to allow 2 mp3 files to be playing at the same time, or do I have to convert them all to wav?

Answer 1

Just so there's a formal answer to this question...

It's not possible to play multiple MP3 sound files simultaneously using channels with PyGame. They can be played singularly with the pygame.mixer.music set of functions.

However, it's absolutely possible to convert your sound-files to OGG sound format - which is compressed much the same as MP3, or the uncompressed WAV format. Obviously this is not a solution if you want to write an MP3 music player, but for a game it's a minor a requirement. Free software such as Audacity is easily able to convert sound formats.

I have adapted the example from the comment link to not use the var module. Like the linked code it continuously plays a rain-sound , and pressing h adds a car horn meep-meep into the output.

import pygame

# Window size
WINDOW_WIDTH    = 400
WINDOW_HEIGHT   = 400
WINDOW_SURFACE  = pygame.HWSURFACE|pygame.DOUBLEBUF|pygame.RESIZABLE

DARK_BLUE = (   3,   5,  54)

### initialisation
pygame.init()
pygame.mixer.init()
window = pygame.display.set_mode( ( WINDOW_WIDTH, WINDOW_HEIGHT ), WINDOW_SURFACE )
pygame.display.set_caption("Multi Sound")

### sound
# create separate Channel objects for simultaneous playback
channel1 = pygame.mixer.Channel(0) # argument must be int
channel2 = pygame.mixer.Channel(1)

# Rain sound from: https://www.freesoundslibrary.com/sound-of-rain-falling-mp3/ (CC BY 4.0)
rain_sound = pygame.mixer.Sound( 'rain-falling.ogg' )
channel1.play( rain_sound, -1 )   # loop the rain sound forever

# Car Horn sound from: https://www.freesoundslibrary.com/car-horn-sound-effect/ (CC BY 4.0)
horn_sound = pygame.mixer.Sound( 'car-horn.ogg' )

### Main Loop
clock = pygame.time.Clock()
done = False
while not done:

    # Handle user-input
    for event in pygame.event.get():
        if ( event.type == pygame.QUIT ):
            done = True
        elif ( event.type == pygame.KEYUP ):
            if ( event.key == pygame.K_h ):
                if ( not channel2.get_busy() ):                          # play horn if not already playing
                    channel2.play( horn_sound )
                    print( 'meep-meep' )

    # Window just stays blue
    window.fill( DARK_BLUE )
    pygame.display.flip()

    # Clamp FPS
    clock.tick_busy_loop(60)

pygame.quit()