Make --audio-codec=raw the default

Encoding and decoding the audio stream adds latency, which is not ideal
for real-time mirroring.

PR #3757 <https://github.com/Genymobile/scrcpy/pull/3757>

app/scrcpy.1

@@ -35,7 +35,7 @@ Default is 0 (no buffering).
 .BI "\-\-audio\-codec " name
 Select an audio codec (raw, opus or aac).
 
-Default is opus.
+Default is raw.
 
 .TP
 .BI "\-\-audio\-encoder " name

app/src/cli.c

@@ -133,7 +133,7 @@ static const struct sc_option options[] = {
         .longopt = "audio-codec",
         .argdesc = "name",
         .text = "Select an audio codec (raw, opus or aac).\n"
-                "Default is opus.",
+                "Default is raw.",
     },
     {
         .longopt_id = OPT_AUDIO_CODEC_OPTIONS,

app/src/options.c

@@ -16,7 +16,7 @@ const struct scrcpy_options scrcpy_options_default = {
 #endif
     .log_level = SC_LOG_LEVEL_INFO,
     .video_codec = SC_CODEC_H264,
-    .audio_codec = SC_CODEC_OPUS,
+    .audio_codec = SC_CODEC_RAW,
     .record_format = SC_RECORD_FORMAT_AUTO,
     .keyboard_input_mode = SC_KEYBOARD_INPUT_MODE_INJECT,
     .mouse_input_mode = SC_MOUSE_INPUT_MODE_INJECT,

app/src/server.c

@@ -238,7 +238,7 @@ execute_server(struct sc_server *server,
         ADD_PARAM("video_codec=%s",
                   sc_server_get_codec_name(params->video_codec));
     }
-    if (params->audio_codec != SC_CODEC_OPUS) {
+    if (params->audio_codec != SC_CODEC_RAW) {
         ADD_PARAM("audio_codec=%s",
             sc_server_get_codec_name(params->audio_codec));
     }

server/src/main/java/com/genymobile/scrcpy/Options.java

@@ -11,7 +11,7 @@ public class Options {
     private boolean audio = true;
     private int maxSize;
     private VideoCodec videoCodec = VideoCodec.H264;
-    private AudioCodec audioCodec = AudioCodec.OPUS;
+    private AudioCodec audioCodec = AudioCodec.RAW;
     private int videoBitRate = 8000000;
     private int audioBitRate = 196000;
     private int maxFps;