PHP curl POST for Watson Video Enrichment - php

Question

Am trying to use PHP 7.2 to submit a new job to the Watson Video Enrichment API.
Here's my code:
//set some vars for all tasks
$apiUrl = 'https://api-dal.watsonmedia.ibm.com/video-enrichment/v2';
$apiKey = 'xxxxxxxx';
//vars for this task
$path = '/jobs';
$name = 'Test1';
$notification_url = 'https://example.com/notification.php';
$url = 'https://example.com/video.mp4';
$data = array(
"name" => $name,
"notification_url" => $notification_url,
"preset" => "simple.custom-model",
"upload" => array(
"url" => $url
)
);
$data_string = json_encode($data);
$ch = curl_init();
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_URL, $apiUrl.$path );
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json',
'Content-Length: ' . strlen($data_string),
'Authorization: APIKey '.$apiKey
));
$result = curl_exec($ch);
echo $result;
But I can't get it to work, even with varying CURLOPTs, like:
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
I keep getting the response: Bad Request.
Here's the API docs.
Am I setting up the POST CURL all wrong? Is my $data array wrong? Any idea how to fix this?

Answer 1

Reading their API documentation, it looks like the field preset is not of type string. Rather it has a schema defined here. This appears similar to how you are using the upload schema.
You should change your data array to look like this:
$data = array(
"name" => $name,
"notification_url" => $notification_url,
"preset" => array(
"video_url" => "https://example.com/path/to/your/video"
),
"upload" => array(
"url" => $url
)
);

Answer 2

Ok, I figured it out. Thanks to #TheGentleman for pointing the way.
My data array should look like:
$data = array(
"name" => $name,
"notification_url" => $notification_url,
"preset" => array(
"simple.custom-model" => array(
"video_url" => $url,
"language" => "en-US"
)
),
"upload" => array(
"url" => $url
)
);