Audio capture fails on BlueStacks Android 11 #4054
Comments
Let's add more logs: diffdiff --git a/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java b/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java
index 9228e3d71..1e2a071ad 100644
--- a/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java
+++ b/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java
@@ -137,10 +137,12 @@ public final class AudioCapture {
// - an estimation from the previous PTS and the packet size as a fallback.
//
// Therefore, the property that PTS are monotonically increasing is no guaranteed in corner cases, so enforce it.
+ Ln.i("=== Estimated");
pts = previousPts + 1;
}
previousPts = pts;
+ Ln.i("=== PTS: " + pts);
outBufferInfo.set(0, r, pts, 0);
return r;
}Replace this binary in your scrcpy v2.0 folder:
And retry your last command. |
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Forget about the previous comment, I added one more log, please test with this version instead: diffdiff --git a/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java b/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java
index 9228e3d71..1e2a071ad 100644
--- a/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java
+++ b/server/src/main/java/com/genymobile/scrcpy/AudioCapture.java
@@ -137,10 +137,12 @@ public final class AudioCapture {
// - an estimation from the previous PTS and the packet size as a fallback.
//
// Therefore, the property that PTS are monotonically increasing is no guaranteed in corner cases, so enforce it.
+ Ln.i("=== Estimated");
pts = previousPts + 1;
}
previousPts = pts;
+ Ln.i("=== PTS: " + pts);
outBufferInfo.set(0, r, pts, 0);
return r;
}
diff --git a/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java b/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java
index 24d685c52..b6dd8d177 100644
--- a/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java
+++ b/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java
@@ -107,6 +107,7 @@ public final class AudioEncoder implements AsyncProcessor {
OutputTask task = outputTasks.take();
ByteBuffer buffer = mediaCodec.getOutputBuffer(task.index);
try {
+ Ln.i("=== output PTS: " + task.bufferInfo.presentationTimeUs);
streamer.writePacket(buffer, task.bufferInfo);
} finally {
mediaCodec.releaseOutputBuffer(task.index, false);
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Here's the new output: |
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Thank you, but in that capture:
You did not reproduce the problem, which was:
|
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OK, I was able to reproduce it this time. |
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OK, the culprit is here: So the encoder produces invalid timestamps. Here is a branch which should fix it: Here is a full release (based on
Please confirm that it fixes the problem for you. |
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Unfortunately, it still produces the same error. |
Oh, it wants the PTS strictly increasing! This branch should fix it: Here is a full release:
|
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Still the same :( |
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WTF 🤔 With more logs: diffdiff --git a/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java b/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java
index 460017d4d..1b57def69 100644
--- a/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java
+++ b/server/src/main/java/com/genymobile/scrcpy/AudioEncoder.java
@@ -105,17 +105,20 @@ public final class AudioEncoder implements AsyncProcessor {
private void outputThread(MediaCodec mediaCodec) throws IOException, InterruptedException {
streamer.writeAudioHeader();
- long lastPts = 0;
+ long lastPts = -1; // so that it the test works also when presentationTimeUs == 0
while (!Thread.currentThread().isInterrupted()) {
OutputTask task = outputTasks.take();
if (task.bufferInfo.presentationTimeUs <= lastPts) {
// Fix PTS if not strictly monotonically increasing
+ Ln.i("=== pts=" + task.bufferInfo.presentationTimeUs + "; lastPts=" + lastPts);
task.bufferInfo.presentationTimeUs = ++lastPts;
+ Ln.i("=== newPts=" + task.bufferInfo.presentationTimeUs);
} else {
lastPts = task.bufferInfo.presentationTimeUs;
}
+ Ln.i("PTS=" + task.bufferInfo.presentationTimeUs);
ByteBuffer buffer = mediaCodec.getOutputBuffer(task.index);
try {
streamer.writePacket(buffer, task.bufferInfo);Replace this binary in your
|
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Here you go: |
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Thank you, so now the PTS look good (strictly increasing) on the server side. Let's add some logs on the client side: diffdiff --git a/app/src/recorder.c b/app/src/recorder.c
index be1cbe719..604b7de99 100644
--- a/app/src/recorder.c
+++ b/app/src/recorder.c
@@ -387,8 +387,11 @@ sc_recorder_process_packets(struct sc_recorder *recorder) {
}
if (audio_pkt) {
+ sc_tick pts = audio_pkt->pts;
audio_pkt->pts -= pts_origin;
audio_pkt->dts = audio_pkt->pts;
+ LOGI("RECORD PTS=%"PRIi64", relPTS=%"PRIi64", dts=%"PRIi64,
+ pts, audio_pkt->pts, audio_pkt->dts);
bool ok = sc_recorder_write_audio(recorder, audio_pkt);
if (!ok) {
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Here it is: |
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Thank you. I think I get it, it's due to PTS rescaling. I will fix it soon. |
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Should be fixed on branch Here is a binary:
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I can confirm that it's fixed now. Thanks! |
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Thank you for your tests (and the report). Fix merged: 323ea2f |
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Environment
Describe the bug
I'm trying to record the screen of a BlueStacks Android 11 (beta) instance.
First I've tried:
Then:
And then:
So I can capture video but not audio.
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