How add webjobs input and output path to the existing storage contain

Question

The below code i was using video resize using webjobs on my application. I want to configure(use) input and output path on my existing storage image container in Azure to the below code. Please advice. thanks in advance

public static void ProcessQueueMessage(
[QueueTrigger("blobcopyqueue")] string filename, TextWriter log,
[Blob("textblobs/{queueTrigger}", FileAccess.Write)] Stream blobOutput
)
{
//set the input file path
string inputfile = string.Format(@"D:\home\site\wwwroot\video\{0}", filename);
//set the input file path
string outputFile = string.Format(@"D:\home\site\wwwroot\video-compress\{0}", filename);
using (var engine = new Engine(@"D:\home\site\wwwroot\compress\ffmpeg.exe"))
{
string command = string.Format(@"-i {0} -vcodec h264 -b:v 250k -acodec mp2 {1}", inputfile, outputFile);
//you could change the command value as what you want to use
engine.CustomCommand(command);
}
using (var fileStream = System.IO.File.OpenRead(outputFile))
{
fileStream.CopyTo(blobOutput);
}
}