AAC VBR stream quality drops after a few seconds
FlintEastwood opened this issue · 7 comments
Hello,
I have this problem with this station:
frontend.streamonkey.net/radioc-live
When the stream starts, everything sounds fine, but after 15-20 seconds the sound quality drops and stays that way. It sounds like a really low bitrate.
When I switch to another station and then back, it sounds fine again for 15-20 seconds and then quality drops again.
The serial monitor doesn't show anything special:
22:04:45.440 -> D: Command: downpreset with parameter 1
22:04:45.487 -> D: Preset is now 0
22:04:45.487 -> D: STOP requested
22:04:45.487 -> D: Stopping client
22:04:45.956 -> D: New preset/file requested (0/0) from frontend.streamonkey.net/radioc-live
22:04:46.003 -> D: New station request
22:04:46.003 -> D: Connect to new host frontend.streamonkey.net/radioc-live
22:04:46.003 -> D: Connect to frontend.streamonkey.net on port 80, extension /radioc-live
22:04:46.050 -> D: Connected to server
22:04:46.144 -> D: Song stopped correctly after 20 msec
22:04:47.082 -> D: Switch to HEADER
22:04:47.082 -> D: Headerline: Access-Control-Allow-Origin: *
22:04:47.082 -> D: Headerline: Cache-Control: no-cache
22:04:47.082 -> D: Headerline: Content-Type: text/html; charset=utf-8
22:04:47.082 -> D: text/html; charset=utf-8 seen.
22:04:47.082 -> D: Headerline: Location: http://edge60.streamonkey.net/radioc-live
22:04:47.082 -> D: Headerline: Server: streaMonkey streaming Server Loadbalancer Native
22:04:47.082 -> D: Headerline: Content-Length: 64
22:04:47.082 -> D: Switch to DATA, bitrate is 0, metaint is 0
22:04:47.082 -> D: New station request
22:04:47.082 -> D: Connect to new host edge60.streamonkey.net/radioc-live
22:04:47.129 -> D: Connect to edge60.streamonkey.net on port 80, extension /radioc-live
22:04:47.176 -> D: Connected to server
22:04:48.160 -> D: Switch to HEADER
22:04:48.160 -> D: Headerline: Access-Control-Allow-Credentials: true
22:04:48.207 -> D: Headerline: Access-Control-Allow-Origin: *
22:04:48.207 -> D: Headerline: Access-Control-Expose-Headers: SessionId, icy-name, icy-description, icy-pub, icy-genre, icy-url, X-Websocket-Url
22:04:48.207 -> D: Headerline: Cache-Control: no-cache
22:04:48.207 -> D: Headerline: Connection: close
22:04:48.207 -> D: Headerline: Content-Type: audio/aac
22:04:48.207 -> D: audio/aac seen.
22:04:48.207 -> D: Headerline: Expires: Mon, 26 Jul 1997 05:00:00 GMT
22:04:48.207 -> D: Headerline: Pragma: no-cache
22:04:48.207 -> D: Headerline: Server: streaMonkey streaming Server Native
22:04:48.207 -> D: Headerline: Sessionid: 6270395e6324be439287f870
22:04:48.241 -> D: Headerline: Set-Cookie: streamingsession=6270395e6324be439287f870; Path=/; Domain=streamonkey.net; Max-Age=9999999999; SameSite=Lax
22:04:48.241 -> D: Headerline: Set-Cookie: sm_websocket_url=wss://edge60.streamonkey.net:443/wstitleupdate/6270395e6324be439287f870; Path=/; Domain=streamonkey.net; Max
22:04:48.241 -> D: Headerline: X-Websocket-Url: wss://edge60.streamonkey.net:443/wstitleupdate/6270395e6324be439287f870
22:04:48.287 -> D: Headerline: icy-audio-info: channels=2;samplerate=44100
22:04:48.287 -> D: Headerline: icy-description: Radio C Luxembourg
22:04:48.287 -> D: Headerline: icy-genre: Rock
22:04:48.287 -> D: Headerline: icy-metaint: 8192
22:04:48.287 -> D: Headerline: icy-name: Radio C Luxembourg
22:04:48.287 -> D: Headerline: icy-pub: 1
22:04:48.287 -> D: Headerline: icy-url: https://radioc.eu
22:04:48.287 -> D: Switch to DATA, bitrate is 0, metaint is 8192
22:04:48.287 -> D: Metadata block 32 bytes
22:04:48.287 -> D: Streamtitle found, 22 bytes
22:04:48.287 -> D: StreamTitle='Radio C';
22:04:48.475 -> D: Metadata block 32 bytes
22:04:48.475 -> D: Streamtitle found, 22 bytes
22:04:48.475 -> D: StreamTitle='Radio C';
22:04:49.342 -> D: Metadata block 32 bytes
22:04:49.342 -> D: Streamtitle found, 22 bytes
22:04:49.342 -> D: StreamTitle='Radio C';
22:04:50.072 -> D: Metadata block 32 bytes
22:04:50.072 -> D: Streamtitle found, 22 bytes
22:04:50.120 -> D: StreamTitle='Radio C';
No problem here. But I used the V2 version of the radio.
The test-button shows:
Free memory is 113792, chunks in queue 395, bitrate 58 kbps
sorry, Ed, copy & paste put in some HTML coding, this should be better:
I tested the station frontend.streamonkey.net/radioc-live with Winamp and saw the bitrate varying from less than 50kbps to more than 150 kbps. I could not hear any loss in quality.
With V1, quality is as in Winamp but the diplay of the bitrate does not follow the variable bitrate, looks that the data for display is not refreshed evry second as Winamp does.
Rainer
Just tested with V2 and I2S output: no problem.
Just tested with V2 and VS1053 output: no problem.
What do you mean by the display of the bitrate? This is only displayed in the web interface for test purposes. It is the bitrate averaged over 10 seconds. Not intended to give a precise real-time measurement.
Hello Ed,
Thank you for your reply.
I needed two evenings to get Platformio running.
Yesterday I loaded V2 into my Esp32.
But the problem with "Radio C" is still the same.
I'm using a AZ Delivery Esp32 Dev Kit v4 (changed board setting in the Platformio.ini) and one of those green square Vs1053 pcb's. But that should work, shouldn't it?
There is a Test button in the Web interface? I need to check this tonight.
Greetings, Stefan
Why don't you install PlatformIO in 5 minutes? That saves some time ;)
The board usually does not matter. Be sure there is a real VS1053 chip on it, There are lots of boards sold with the wrong chip.
Haha yes, install was fast, but for me getting used to, took a bit more time. ;)
The chip on my green PCB is a real VS1053B .
I modified your code just for testing (should I fork this?). I made a similar function as the Timer10sec function called Timer2sec, but executed every two seconds to calculate the bitrate and print it via "mbitreq=true" to the serial monitor.
Now you can see that the bitrate drops after a few seconds and that is what I hear.
The same chunk recorded with streamwriter on PC has an average bitrate of 87kbps. Much higher than the ESP32radio reports.
Is it possible, that the streamonkey link has multiple streams with different bitrates and the ESP32radio switches (or is forced) to a lower bitrate? I really have no knowledge about such things.
D: IR code 50AF received. Will execute downpreset = 1
D: updateNr 1 <= 7 to -1, relative is 1
D: updateNr result is 0
D: nextPreset is 0
D: Preset is now 0
D: Radiofuncs cmd is 1
D: Stopping client
D: Connect to host frontend.streamonkey.net/radioc-live
D: send GET command
D: Switch to HEADER
D: Headerline: Access-Control-Allow-Origin: *
D: Headerline: Cache-Control: no-cache
D: Headerline: Content-Type: text/html; charset=utf-8
D: Headerline: Location: http://edge63.streamonkey.net/radioc-live
D: Headerline: Server: streaMonkey streaming Server Loadbalancer Native
D: Headerline: Content-Length: 64
D: Redirect
D: Switch to HEADER
D: Radiofuncs cmd is 1
D: Connect to host edge63.streamonkey.net/radioc-live
D: send GET command
D: Song stopped correctly after 20 msec
D: Switch to HEADER
D: Headerline: Access-Control-Allow-Credentials: true
D: Headerline: Access-Control-Allow-Origin: *
D: Headerline: Access-Control-Expose-Headers: SessionId, icy-name, icy-description, icy-pub, icy-genre, icy-url, X-Websocket-Url
D: Headerline: Cache-Control: no-cache
D: Headerline: Connection: close
D: Headerline: Content-Type: audio/aac
D: Headerline: Expires: Mon, 26 Jul 1997 05:00:00 GMT
D: Headerline: Pragma: no-cache
D: Headerline: Server: streaMonkey streaming Server Native
D: Headerline: Sessionid: 62762e18e0654511db2c3b5e
D: Headerline: Set-Cookie: streamingsession=62762e18e0654511db2c3b5e; Path=/; Domain=streamonkey.net; Max-Age=9999999999; SameSite=Lax
D: Headerline: Set-Cookie: sm_websocket_url=wss://edge63.streamonkey.net:443/wstitleupdate/62762e18e0654511db2c3b5e; Path=/; Domain=streamonkey.net; Max-Age=9999999999; SameSite=Lax
D: Headerline: X-Websocket-Url: wss://edge63.streamonkey.net:443/wstitleupdate/62762e18e0654511db2c3b5e
D: Headerline: icy-audio-info: channels=2;samplerate=44100
D: Headerline: icy-description: Radio C Luxembourg
D: Headerline: icy-genre: Rock
D: Headerline: icy-metaint: 8192
D: Headerline: icy-name: Radio C Luxembourg
D: Headerline: icy-pub: 1
D: Headerline: icy-url: https://radioc.eu
D: Switch to DATA, bitrate is 0, metaint is 8192
D: Streamtitle found, 40 bytes
D: StreamTitle='Wir sind Helden - Denkmal';
D: Streamtitle found, 40 bytes
D: StreamTitle='Wir sind Helden - Denkmal';
D: Free memory is 69620, chunks in queue 400, bitrate 4294611 kbps
D: Streamtitle found, 40 bytes
D: StreamTitle='Wir sind Helden - Denkmal';
D: Streamtitle found, 40 bytes
D: StreamTitle='Wir sind Helden - Denkmal';
D: Free memory is 67572, chunks in queue 400, bitrate 69 kbps
D: Streamtitle found, 40 bytes
D: StreamTitle='Wir sind Helden - Denkmal';
D: Free memory is 67572, chunks in queue 400, bitrate 71 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 64 kbps
D: Free memory is 69620, chunks in queue 400, bitrate 72 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 66 kbps
D: Free memory is 65524, chunks in queue 400, bitrate 79 kbps
D: Free memory is 69620, chunks in queue 400, bitrate 69 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 53 kbps <-- Here drops the quality!
D: Free memory is 67572, chunks in queue 400, bitrate 50 kbps
D: Free memory is 69620, chunks in queue 400, bitrate 49 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 49 kbps
D: Free memory is 69620, chunks in queue 400, bitrate 48 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 49 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 51 kbps
D: Free memory is 69620, chunks in queue 400, bitrate 46 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 48 kbps
D: Free memory is 67572, chunks in queue 400, bitrate 49 kbps
Greetings, Stefan