Log av_write_frame failure

Refs #2218 <https://github.com/Genymobile/scrcpy/issues/2218>

BUILD.md

@@ -208,8 +208,8 @@ make it avaliable from the `PATH`:
 
 ```bash
 brew tap homebrew/cask-versions
-brew install adoptopenjdk/openjdk/adoptopenjdk11
+brew cask install adoptopenjdk/openjdk/adoptopenjdk8
-export JAVA_HOME="$(/usr/libexec/java_home --version 1.11)"
+export JAVA_HOME="$(/usr/libexec/java_home --version 1.8)"
 export PATH="$JAVA_HOME/bin:$PATH"
 ```
 

README.md

@@ -127,7 +127,11 @@ brew install scrcpy
 You need `adb`, accessible from your `PATH`. If you don't have it yet:
 
 ```bash
-brew install android-platform-tools
+# Homebrew >= 2.6.0
+brew install --cask android-platform-tools
+
+# Homebrew < 2.6.0
+brew cask install android-platform-tools
 ```
 
 You can also [build the app manually][BUILD].

app/src/recorder.c

@@ -252,7 +252,13 @@ recorder_write(struct recorder *recorder, AVPacket *packet) {
     }
 
     recorder_rescale_packet(recorder, packet);
-    return av_write_frame(recorder->ctx, packet) >= 0;
+    int ret = av_write_frame(recorder->ctx, packet);
+    if (ret < 0) {
+        LOGE("Could not write frame: %d\n", ret);
+        return false;
+    }
+
+    return true;
 }
 
 static int