Flood records in console window: `[server] WARN: Colud not get any audio timestamp`

[mihmig]

Environment

• OS: Windows 10 x64
• scrcpy version: 2.0
• installation method: Windows release.
• device model: Motorola G9 Play
• Android version: 11

Flood records in console window (several lines per second(!)): [server] WARN: Colud not get any audio timestamp

[rom1v]

Thank you for your report.

https://github.com/Genymobile/scrcpy/blob/1a80333747de602b03ca7ae6b8e58790eeefc3dc/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java#L125

So this means that audioRecord.read() always returns 0, which is unexpected.

According to the documentation, this happens when the buffer is not a direct buffer, which is also unexpected (it's a buffer from MediaCodec).

Could you please paste the output of scrcpy -Vdebug (with just the beginning and the firsts warnings, not the thousand ones :wink:)?

[rom1v]

I can reproduce on my Android 11 device by disabling some workarounds:

diff --git a/server/src/main/java/com/genymobile/scrcpy/Server.java b/server/src/main/java/com/genymobile/scrcpy/Server.java
index 5800487da..3e5985ac8 100644
--- a/server/src/main/java/com/genymobile/scrcpy/Server.java
+++ b/server/src/main/java/com/genymobile/scrcpy/Server.java
@@ -83,11 +83,6 @@ public final class Server {
         //  - <https://github.com/Genymobile/scrcpy/issues/994>
         boolean mustFillAppInfo = Build.BRAND.equalsIgnoreCase("meizu");
 
-        // Before Android 11, audio is not supported.
-        // Since Android 12, we can properly set a context on the AudioRecord.
-        // Only on Android 11 we must fill app info for the AudioRecord to work.
-        mustFillAppInfo |= audio && Build.VERSION.SDK_INT == Build.VERSION_CODES.R;
-
         if (mustFillAppInfo) {
             Workarounds.fillAppInfo();
         }

On dev branch, commit 337d6c2fd351226ede8b7b2b164ffd3d67a6953f avoids to flood the console, but does not fix the audio problem.

[mihmig]

Here are the required log entries: scrcpy_debug_log.txt

[rom1v]

Oh, these logs show a different issue, it's not "Could not get any audio timestamp" but "Buffering threshold exceeded".

See #3793.

In particular, replace this binary: https://github.com/Genymobile/scrcpy/issues/3793#issuecomment-1465713098 And run scrcpy --audio-output-buffer=10.