Is it possible to encode AVI video to MP4 using Azure function?

Question

Since Azure Media Service is being retired next year, I was thinking to try different approach to encode a video to MP4 and this approach includes Azure Function. The flow would be like this

1. Get BlobInputStream by calling blobClient.openInputStream() on BlobClient.
2. Get byte[] from BlobInputStream.
3. Use some library to perform encoding like JAVE2 or FFMPEG.(This is where my confusion is how to do this).
4. Hopig above would result in byte[], create InputStream from byte[].
5. Write encoded video to storage account container by calling upload(InputStream data) on BlobClinet.

In theory sounds simple but the problem I am running into here is JAVE2 and other similar libraries accepts java.io.File object for input and output but azure-storage-blob library does not exposes any api to get File object. Now option left is to open inputstream to get byte[] but then how to encode a byte array.

Update: Input file size is max 100MB.

Answer 1

I accomplished this with Java azure function and JAVE2 library. I got the SAS Url of source file, then fed that to MultimediaObject

Sample Code:

private File encoded = null;

MultimediaObject multimediaObject = new MultimediaObject(new URL(blobSasUrl));

VideoAttributes video = new VideoAttributes();
video.setCodec(LIBX264_CODEC);
video.setFrameRate(FRAME_RATE);

EncodingAttributes attrs = new EncodingAttributes();
attrs.setOutputFormat(ENCODE_FORMAT);
attrs.setVideoAttributes(video);

Encoder encoder = new Encoder();
encoder.encode(multimediaObject, encoded, attrs);