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Bug 2649

Summary: SDL2_mixer 2.0.0 ogg playback is partly broken?
Product: SDL_mixer Reporter: Tomas Ukkonen <nop>
Component: miscAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED DUPLICATE QA Contact: Ryan C. Gordon <icculus>
Severity: normal    
Priority: P2 CC: philipp.wiesemann
Version: 2.0.0   
Hardware: x86_64   
OS: Linux   

Description Tomas Ukkonen 2014-07-17 12:37:09 UTC 
SDL2_mixer ogg playback do not work correctly when a playback frequency is different from the sampling rate. 

Wav files encoded with oggenc play ok with mplayer but have lots of noise if played with SDL2_mixer. The exactly same code works ok with mp3 files or with ogg files when the sampling frequency is same as the playback frequency.

The code I use for playback is:

(init)

Mix_OpenAudio(44100, MIX_DEFAULT_FORMAT, 2, 4096);
tracks[track] = Mix_LoadMUS(sounds[track].c_str());
Mix_FadeInMusic(tracks[track], -1, 1000);

(deinit)

The difference with oggs that play OK are that they have 44100 sampling frequency and ogg's that play incorrectly have 48000 sampling frequency. Now, if I change playback frequency to 48000 in Mix_OpenAudio() the playback is now ok with oggs having sampling frequency 48000 but garbled with 44100.

Platform:
VirtualBox (3 core intel i7, 1 GB RAM)
Linux 3.2.0-4-amd64 #1 SMP Debian (testing) 3.2.60-1+deb7u1 x86_64 GNU/Linux (64bit)

SDL2_mixer build from the tarball.
Comment 1 Ryan C. Gordon 2016-01-03 21:01:30 UTC 
This is a bug in SDL, not SDL_mixer. We intend to fix this for SDL 2.0.5.

--ryan.

*** This bug has been marked as a duplicate of bug 58 ***