search

schreibfaul1 / ESP32-audioI2S

Play mp3 files from SD via I2S
GNU General Public License v3.0
1.16k stars 292 forks source link

stream preparation takes a lot of time #243

Closed unregistered33 closed 2 years ago

unregistered33 commented 2 years ago

As the code became more complex, the audio started playing with a long delay (about 3-5 seconds). The audio playback code has not changed, but a Web server (+ css / js / images) has been added. What could be causing the delay? Potentially out of memory problems?

Serial log: info PSRAM found, inputBufferSize: 283615 bytes info buffers freed, free Heap: 175256 bytes info Reading file: "/bells/castle1.mp3" info MP3Decoder has been initialized, free Heap: 151624 bytes --------------------------------------------------------------------------> delay ~3-5 sec info stream ready info Content-Length: 111203 info ID3 framesSize: 54

unregistered33 commented 2 years ago

It looks like magic. I started to turn off all the functionality (AsyncWebServer, ArduinoJSON, WiFi) step by step, and when I turned off WiFi, the delay disappeared. I thought I had found the problem, but when I plugged everything back in for an additional test, everything is also fine and works! I don't know how to explain this...

seife commented 2 years ago

For me AsyncWebServer was not working well together with ESP32-audioI2S. I thought I need it for AsyncElegantOTA until I found ElegantOTA which works without the AsyncWebServer. I did not investigate further back then, unfortunately.

unregistered33 commented 2 years ago

Oh, no! It's work very well! I found problem - NTP synchronization via standart way. GetLocalTime() - blocks main loop and i have long delay. Now im using async ESPNTPClient (with a little modification for core 2.0.1) and all fine

seife commented 2 years ago

Ok, then disregard my comment ;-) I was seeing AsyncElegantOTA being unreliable when sound was playing at the same time, so switching away from it to ElegantOTA (and to normal webserver code) fixed that for me :-)

stale[bot] commented 2 years ago

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.