I've got two mp3 files that are exactly the same length, and line up pretty well musically. The intended effect is that, when a button is pressed, the song playing switches from one song to the other. My implementation looks like this:
import pygame
import sys
framerate = 30
from mutagen.mp3 import MP3
audio = MP3("foo.mp3")
songleng = audio.info.length*1000
songpos = 0
pygame.mixer.pre_init(44100, -16, 1, 512)
pygame.init()
clock = pygame.time.Clock()
size = [10, 10]
screen = pygame.display.set_mode(size)
char = 'foo'
pygame.mixer.music.load('foo.mp3')
pygame.mixer.music.play(-1)
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.display.quit()
sys.exit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_RETURN:
songpos += pygame.mixer.music.get_pos()%songleng
pygame.mixer.music.stop()
print(songpos)
if char == 'bar':
pygame.mixer.music.load('foo.mp3')
char = 'foo'
else:
pygame.mixer.music.load('bar.mp3')
char = 'bar'
try:
pygame.mixer.music.play(-1, songpos/1000)
except Exception as e:
print(str(e))
print(pygame.mixer.music.get_pos())
pygame.display.flip()
clock.tick(framerate)
Now, while this does seem to work some of the time, sometimes the audio gets very watery, and sometimes the whole thing just hangs, not responding to keyboard interrupt. Very rarely, I get a segmentation fault. Pdb gives me a different error every time. I've tried rounding songpos, which doesn't seem to help, and I've tried calling pygame.mixer.music.set_pos(), which has the same effects. I should also mention that the mp3 frequency, 44100, is correct.
I haven't tried it on any other computers, so if this works on your system that'll be the first step to figuring out the problem. I've got a pretty clean install of Ubuntu 16.04.3.
