Fix --encoder documentation

Mention that it depends on the codec provided by --codec (which is not
necessarily H264 anymore).

app/data/zsh-completion/_scrcpy

@@ -18,7 +18,7 @@ arguments=(
     '--display=[Specify the display id to mirror]'
     '--display-buffer=[Add a buffering delay \(in milliseconds\) before displaying]'
     {-e,--select-tcpip}'[Use TCP/IP device]'
-    '--encoder=[Use a specific MediaCodec encoder \(must be a H.264 encoder\)]'
+    '--encoder=[Use a specific MediaCodec encoder]'
     '--force-adb-forward[Do not attempt to use \"adb reverse\" to connect to the device]'
     '--forward-all-clicks[Forward clicks to device]'
     {-f,--fullscreen}'[Start in fullscreen]'

app/scrcpy.1

@@ -82,7 +82,7 @@ Also see \fB\-d\fR (\fB\-\-select\-usb\fR).
 
 .TP
 .BI "\-\-encoder " name
-Use a specific MediaCodec encoder (must be a H.264 encoder).
+Use a specific MediaCodec encoder (depending on the codec provided by \fB\-\-codec\fR).
 
 .TP
 .B \-\-force\-adb\-forward

app/src/cli.c

@@ -175,7 +175,8 @@ static const struct sc_option options[] = {
         .longopt_id = OPT_ENCODER_NAME,
         .longopt = "encoder",
         .argdesc = "name",
-        .text = "Use a specific MediaCodec encoder (must be a H.264 encoder).",
+        .text = "Use a specific MediaCodec encoder (depending on the codec "
+                "provided by --codec).",
     },
     {
         .longopt_id = OPT_FORCE_ADB_FORWARD,