I try to input a .aac in .mp4
as we known
ffmpeg cmd
ffmpeg -i audio.mp3 -i video.mp4 -c copy output
How to do it in c# uwp, i have search in google i not see this any result regarding this issue , everyone has posted converting issue.
But how to merge it with c# any sample prj or information will be great
C# universal platform audio merge or input in video
UWP provide APIs about this requirement. This feature can be implemented in uwp by BackgroundAudioTracks method of MediaComposition class. Details for how to do please reference Add a background audio track to a composition. And you can find a sample from scenario 3 of MediaEditing official sample.
For example:
// Create the original MediaComposition
var clip = await MediaClip.CreateFromFileAsync(pickedFile);
composition = new MediaComposition();
composition.Clips.Add(clip);
// Add background audio
var picker = new Windows.Storage.Pickers.FileOpenPicker();
picker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.MusicLibrary;
picker.FileTypeFilter.Add(".mp3");
picker.FileTypeFilter.Add(".wav");
picker.FileTypeFilter.Add(".flac");
var audioFile = await picker.PickSingleFileAsync();
if (audioFile == null)
{
rootPage.NotifyUser("File picking cancelled", NotifyType.ErrorMessage);
return;
}
var backgroundTrack = await BackgroundAudioTrack.CreateFromFileAsync(audioFile);
composition.BackgroundAudioTracks.Add(backgroundTrack);
// Render to MediaElement
mediaElement.Position = TimeSpan.Zero;
mediaStreamSource = composition.GeneratePreviewMediaStreamSource((int)mediaElement.ActualWidth, (int)mediaElement.ActualHeight);
mediaElement.SetMediaStreamSource(mediaStreamSource);
The MediaComposition is created from the video file. The BackgroundAudioTrack is created from the Mp3 or other audio files you want to merge to the video. At last, we need to render the MediaComposition to file(the sample is render to MediaElement for playing).
MediaComposition.RenderToFileAsync has several overload methods, with this one, you may assign MediaEncodingProfile to what you want to keep quality. If you still have issue when you using these parameters, you can open a new thread. thanks for understanding.public async Task<StorageFile> MergeVideoAudioAsync(StorageFile videoFile, StorageFile audioFile, string finalFileName, StorageFolder destinationFolder)
{
MediaComposition composition = new MediaComposition();
var file = await destinationFolder.CreateFileAsync(finalFileName, CreationCollisionOption.GenerateUniqueName);
var clip = await MediaClip.CreateFromFileAsync(videoFile);
composition.Clips.Add(clip);
var backgroundTrack = await BackgroundAudioTrack.CreateFromFileAsync(audioFile);
composition.BackgroundAudioTracks.Add(backgroundTrack);
await composition.RenderToFileAsync(file);
return file;
}
