Calling the rest video intelligence API in JAVA

I've been trying to call the rest API of video intelligence through a java program to annotate a local file. Here is my code:

        byte[] data = Files.readAllBytes(path);
        byte[] encodedBytes = Base64.encodeBase64(data);

        URIBuilder builder = new URIBuilder("https://videointelligence.googleapis.com/v1beta2/videos:annotate");
        URI uri = builder.build();
        HttpPost request = new HttpPost(uri);
        request.setHeader("Content-Type", "application/json");
        request.setHeader("X-Goog-Api-Key",MyKey);

        JSONObject json = new JSONObject();
        JSONArray jsonArray = new JSONArray();
        jsonArray.put("LABEL_DETECTION");
        json.put("inputContent", encodedBytes);
        json.put("features", jsonArray);

        StringEntity reqEntity = new StringEntity(json.toString());
        request.setEntity(reqEntity);
        HttpResponse response = httpclient.execute(request);
        HttpEntity entity = response.getEntity();

I'm getting this error: "error": { "code": 400, "message": "Invalid JSON payload received. Unknown name \"input_content\": Proto field is not repeating, cannot start list.

Could anyone help me with this error please? thank you

The error message is not really helpful. Problem here is that "inputContent" should be String instead of byte[]. This worked for me:

String str = new String(encodedBytes, "UTF-8");
requestJson.put("inputContent", str);