Best Python 3.5 library for playing mp3 file on Raspberry pi 0 W

Question

I've already tried VLC library but the cpu reach 100% usage frequently during file playing, I've also the necessity to track the state of the playing so to know when the file is ended etc., Any ideas?

Answer 1

You might experience better performance using omxplayer:

Omxplayer is a video player specifically made for the Raspberry Pi's GPU made by Edgar (gimli) Hucek from the XBMC/Kodi project. It relies on the OpenMAX hardware acceleration API, which is the Broadcom's VideoCore officially supported API for GPU video/audio processing.

If you're using Raspbian, omxplayer will already be installed. To output to HDMI, just run:

omxplayer -o hdmi <filename>

For further information, check the link above or use man omxplayer to read the manual page.

The Pi Zero uses a BCM2835 SoC, which supports Broadcom's proprietary media acceleration features. omxplayer can take advantage of this to gain better performance than software-accelerated playback.

To track whether playback has ended, you can use the os.system() function in Python. Presumably, when playback is complete, the function will return 0 (exit code 0 implies success, generally, on Unix systems). The call is synchronous so your script will wait until playback is complete until moving to the next line.