CODEWITHSUNDEEP
c#uwpmedia
Roofkiller
Roofkiller

Reputation: 31

UWP MediaTranscoder throws NullReferenceException

I want to convert a .avi video file to a .mp3 audio file and used the following code:

var folder = ApplicationData.Current.LocalFolder;
var video = await folder.GetFileAsync("video.avi");
var targetFile = await folder.CreateFileAsync("audio.mp3");
var profile = MediaEncodingProfile.CreateMp3(AudioEncodingQuality.Auto);
var transcoder = new MediaTranscoder();
var prepareTask = transcoder.PrepareFileTranscodeAsync(video, targetFile, profile);

However transcoder.PrepareFileTranscodeAsync(video, targetFile, profile);throws a NullReferenceException despite neither transcoder, video, targetFile or profile is null.

Upvotes: 1

Views: 102

Answers (1)

Roofkiller
Roofkiller

Reputation: 31

Nevermind found the issue AudioEncodingQuality.Auto is not working when the target file is empty. Using AudioEncodingQuality.High or something else works fine.

Upvotes: 1

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