diff --git a/README.md b/README.md
index 958a9f9..de1335b 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ To properly test and run this project, you will need to prepare your environment
    - Ensure Node.js (v18+) is installed.
    - Install **FFmpeg** on your system and make sure it is available in your PATH environment variable. The Node.js library `fluent-ffmpeg` requires it.
    - If you plan to use Rockchip hardware encoding, make sure your FFmpeg build includes `h264_rkmpp` / `hevc_rkmpp` support and the device has the Rockchip MPP runtime available.
+   - By default, RKMPP mode uses `/usr/lib/jellyfin-ffmpeg/ffmpeg`. You can override that path with `RKMPP_FFMPEG_PATH`.
 
 2. **AWS S3 / MinIO Configuration**:
    - Modify the `.env` file (copy from `.env.example`).
diff --git a/server.js b/server.js
index 984b5a1..3c2848e 100644
--- a/server.js
+++ b/server.js
@@ -15,6 +15,7 @@ const app = express();
 const PORT = process.env.PORT || 3000;
 const HOST = process.env.HOST || process.env.LISTEN_ADDRESS || '0.0.0.0';
 const server = http.createServer(app);
+const RKMPP_FFMPEG_PATH = process.env.RKMPP_FFMPEG_PATH || '/usr/lib/jellyfin-ffmpeg/ffmpeg';
 
 app.use(cors());
 app.use(express.json());
@@ -110,6 +111,26 @@ const createFfmpegOptions = (encoderName) => {
     return options;
 };
 
+const isRkmppCodec = (codecName) => /_rkmpp$/.test(codecName);
+
+const getRkmppDecoderName = (metadata) => {
+    const videoStream = (metadata?.streams || []).find((stream) => stream.codec_type === 'video');
+    const codecName = (videoStream?.codec_name || '').toLowerCase();
+    const decoderMap = {
+        av1: 'av1_rkmpp',
+        h263: 'h263_rkmpp',
+        h264: 'h264_rkmpp',
+        hevc: 'hevc_rkmpp',
+        mjpeg: 'mjpeg_rkmpp',
+        mpeg1video: 'mpeg1_rkmpp',
+        mpeg2video: 'mpeg2_rkmpp',
+        mpeg4: 'mpeg4_rkmpp',
+        vp8: 'vp8_rkmpp',
+        vp9: 'vp9_rkmpp'
+    };
+    return decoderMap[codecName] || null;
+};
+
 const parseFpsValue = (fpsText) => {
     if (typeof fpsText !== 'string' || !fpsText.trim()) {
         return 0;
@@ -531,6 +552,10 @@ app.get('/api/stream', async (req, res) => {
                 .outputOptions(streamingOptions)
                 .format('mp4');
 
+            if (isRkmppCodec(encoderName) && typeof ffmpegCommand.setFfmpegPath === 'function') {
+                ffmpegCommand.setFfmpegPath(RKMPP_FFMPEG_PATH);
+            }
+
             if (startSeconds > 0) {
                 if (typeof ffmpegCommand.seekInput === 'function') {
                     ffmpegCommand.seekInput(startSeconds);
@@ -543,6 +568,11 @@ app.get('/api/stream', async (req, res) => {
                 ffmpegCommand
                     .inputOptions(['-vaapi_device', '/dev/dri/renderD128'])
                     .videoFilters('format=nv12,hwupload');
+            } else if (isRkmppCodec(encoderName)) {
+                const rkmppDecoder = getRkmppDecoderName(sourceMetadata);
+                if (rkmppDecoder) {
+                    ffmpegCommand.inputOptions(['-c:v', rkmppDecoder]);
+                }
             }
 
             transcodeProcesses.set(progressKey, { command: ffmpegCommand, streamSessionId });