Tweak: add ability to disable audio recording

Signed-off-by: Vasiliy Doylov <nekocwd@mainlining.org>

README.md

@@ -10,7 +10,8 @@ Mostly made for PostmarketOS phones
   - `DOWNSCALE_VIDEO` = `640` - Int, maximum image dimension in video mode (0 to disable downscale)
   - `DOWNSCALE_PHOTO` = `0` - Int, maximum image dimension in photo mode (0 to disable downscale)
   - `VIDEO_ENCODE` = `x264enc tune=zerolatency speed-preset=ultrafast bitrate=8192` - String, video encode pipeline
-
+  - `AUDIO_ENABLED` = `true` - Bool, is audio record enabled (`false` to disable)
+  - `AUDIO_PROFILE` = `audio/x-ac3` - String - audio encoding
 ## Project TODO:
   - [ ] Fix cam/mode switching? (I can't reproduce errors)
   - [ ] Simplify customization

src/gst.vala

@@ -141,9 +141,11 @@ public class EyeNeko.Gstreamer : Object {
     private void add_enc_profile () {
         var cp = new Gst.PbUtils.EncodingContainerProfile (null, null, Gst.Caps.from_string ("video/quicktime"), null);
         var vp = new Gst.PbUtils.EncodingVideoProfile (Gst.Caps.from_string ("video/x-h264"), null, null, 0);
-        var ap = new Gst.PbUtils.EncodingAudioProfile (Gst.Caps.from_string ("audio/x-ac3"), null, null, 0);
+        if (bool.parse (Env.get_variable_or ("AUDIO_ENABLED", "true"))) {
+            var ap = new Gst.PbUtils.EncodingAudioProfile (Gst.Caps.from_string (Env.get_variable_or ("AUDIO_PROFILE", "audio/x-ac3")), null, null, 0);
+            cp.add_profile (ap);
+        }
         cp.add_profile (vp);
-        cp.add_profile (ap);
         camerabin.set_property ("video-profile", cp);
     }