msgconv/from-matrix: only convert voice formats WhatsApp doesn't accept

pkg/connector/capabilities.go

@@ -52,7 +52,7 @@ func (wa *WhatsAppConnector) GetCapabilities() *bridgev2.NetworkGeneralCapabilit
 }
 
 func (wa *WhatsAppConnector) GetBridgeInfoVersion() (info, caps int) {
-	return 1, 10
+	return 1, 11
 }
 
 const WAMaxFileSize = 2000 * 1024 * 1024
@@ -67,7 +67,7 @@ func supportedIfFFmpeg() event.CapabilitySupportLevel {
 }
 
 func capID() string {
-	base := "fi.mau.whatsapp.capabilities.2026_10_01"
+	base := "fi.mau.whatsapp.capabilities.2026_11_10"
 	if ffmpeg.Supported() {
 		return base + "+ffmpeg"
 	}
@@ -119,6 +119,7 @@ var whatsappCaps = &event.RoomFeatures{
 			MimeTypes: map[string]event.CapabilitySupportLevel{
 				"audio/ogg; codecs=opus": event.CapLevelFullySupported,
 				"audio/ogg":              event.CapLevelUnsupported,
+				"audio/webm":             supportedIfFFmpeg(),
 			},
 			Caption: event.CapLevelDropped,
 			MaxSize: WAMaxFileSize,

pkg/msgconv/from-matrix.go

@@ -700,7 +700,14 @@ func (mc *MessageConverter) reuploadFileToWhatsApp(
 			// Hopefully it's opus already
 			mime = "audio/ogg; codecs=opus"
 		default:
-			return nil, nil, mime, fmt.Errorf("%w %s in audio message", bridgev2.ErrUnsupportedMediaType, mime)
+			if content.MSC3245Voice == nil || !ffmpeg.Supported() {
+				return nil, nil, mime, fmt.Errorf("%w %s in audio message", bridgev2.ErrUnsupportedMediaType, mime)
+			}
+			data, err = ffmpeg.ConvertBytes(ctx, data, ".ogg", []string{}, []string{"-vn", "-c:a", "libopus"}, mime)
+			if err != nil {
+				return nil, nil, mime, fmt.Errorf("%w (voice to ogg): %w", bridgev2.ErrMediaConvertFailed, err)
+			}
+			mime = "audio/ogg; codecs=opus"
 		}
 		mediaType = whatsmeow.MediaAudio
 	case event.MsgFile: