Add FFmpeg MP3 to OGG Opus conversion for native voice notes

whatsapp-gateway/baileys-client.js

@@ -311,6 +311,30 @@ async function disconnectSession(session_key) {
     }
 }
 
+const { exec } = require('child_process');
+const os = require('os');
+
+function convertToOggOpus(base64Audio) {
+    return new Promise((resolve, reject) => {
+        const timeId = Date.now() + Math.random().toString(36).substring(7);
+        const inputPath = path.join(os.tmpdir(), `input_${timeId}.tmp`);
+        const outputPath = path.join(os.tmpdir(), `output_${timeId}.ogg`);
+
+        fs.writeFile(inputPath, Buffer.from(base64Audio, 'base64'), (err) => {
+            if (err) return reject(err);
+            exec(`ffmpeg -i ${inputPath} -c:a libopus -y ${outputPath}`, (execErr) => {
+                fs.unlink(inputPath, () => {});
+                if (execErr) return reject(execErr);
+                fs.readFile(outputPath, (readErr, data) => {
+                    fs.unlink(outputPath, () => {});
+                    if (readErr) return reject(readErr);
+                    resolve(data.toString('base64'));
+                });
+            });
+        });
+    });
+}
+
 /**
  * Send a message using an active session
  */
@@ -324,14 +348,29 @@ async function sendMessage(session_key, phone, message, mediaUrl = null, audioBa
     let sentMsg;
 
     if (audioBase64) {
-        const buffer = Buffer.from(audioBase64, 'base64');
-        const mime = mimetype || 'audio/mp4';
-        const isMp3 = mime.includes('mpeg') || mime.includes('mp3');
+        let finalAudioBase64 = audioBase64;
+        let finalMime = mimetype || 'audio/mp4';
+        
+        // If it's MP3, convert to OGG Opus to ensure iPhone PTT compatibility
+        if (finalMime.includes('mpeg') || finalMime.includes('mp3')) {
+            try {
+                console.log(`[Baileys] Converting MP3 to OGG Opus for native PTT...`);
+                finalAudioBase64 = await convertToOggOpus(audioBase64);
+                finalMime = 'audio/ogg; codecs=opus';
+            } catch (err) {
+                console.error(`[Baileys] FFmpeg conversion failed:`, err.message);
+                // Fallback to sending as normal audio if conversion fails
+                finalMime = 'audio/mp4'; 
+            }
+        }
+        
+        const buffer = Buffer.from(finalAudioBase64, 'base64');
+        const isMp3 = finalMime.includes('mpeg') || finalMime.includes('mp3');
         
         sentMsg = await sock.sendMessage(jid, {
             audio: buffer,
-            mimetype: mime,
-            ptt: !isMp3 // Disable PTT for MP3 to prevent iOS playback errors
+            mimetype: finalMime,
+            ptt: !isMp3 // PTT enabled for OGG/MP4, disabled for raw MP3
         });
     } else if (mediaUrl) {
         const ext = mediaUrl.split('.').pop().toLowerCase();