Using GstAppSrc source leads to jerky sound on OpenSuSE 43.2 (PulseAudio)

[George Yunaev]

Hi all,

When playing sound from GstAppSrc, seekable stream, my application 
sounds weird on my machine. Sound is played only half of each second; 
the other half no sound is played.

No error messages of any kind are printed in the console.

I assumed that it was due to some kind of strange input buffer underrun, 
so I rewrote the application pushing buffers in a separate thread 
indefinitely (ignoring enough-data). It fills it up fully even before 
the sound is heard, but the output is the same - jerky sound which turns 
off every half seconds.

The same pipeline plays regular music files from disk (opened through 
'url' source) fine.

If needed, the player source is here: 
https://github.com/gyunaev/spivak/blob/master/src/mediaplayer.cpp - it 
handles both video and audio and thus is pretty complex. in 
setupSource() the audio sink is set up, and the callbacks read the data 
from QIODevice.

Thank you in advance!

-- 
With best regards, George.
Senior Software Security Engineer
http://www.ulduzsoft.com/about-me/resume/