Windows 10: Using FFmpeg in Windows Applications

Brink · Jun 4, 2015

It is important to Microsoft that developers can leverage open-source software when building apps for Windows. As part of this effort we’re very pleased to announce FFmpeg support for Window 8.1, Windows Phone 8.1, and Windows 10 applications.

What is FFmpeg?
FFmpeg is a free, open-source multimedia framework that includes a set of tools which can be used by end users for transcoding, streaming, and playing, as well as a set of libraries for developers to use in applications. These libraries are valuable to developers as they add support for virtually all media formats including .mkv, .flv, and .mov. Projects that use FFmpeg libraries include Google Chrome, VLC, and many more.

What’s new?
We have released a set of Compilation Instructions for a WinRT compatible build of FFmpeg. Typically, after including FFmpeg libraries, developers have to go through the costly effort of rendering audio and video frames themselves. To solve this issue, we have released an open-source project, FFmpegInterop library for Windows. This project includes the FFmpegInterop WinRT component which processes media with FFmpeg and then leverages the Windows Media Framework for playback. This approach works well because the Windows Media Framework automatically renders and synchronizes media samples while reaping the benefits of hardware acceleration.

To demonstrate this we have also included three sample Media Player applications in C#, C++, and JavaScript.

CompilationGuide/WinRT – FFmpeg

Microsoft/FFmpegInterop

Compilation Instructions
In order to leverage the powerful and diverse multimedia features of FFmpeg, we have contributed a set of compilation instructions for Windows 8.1, Windows Phone 8.1, and Windows 10 applications. After following the compilation instructions, developers can include FFmpeg libraries in their applications, enabling apps to play or stream almost any video format.

FFmpegInterop Object
FFmpegInterop is a WindowsRuntime Component that produces a MediaStreamSource which can be assigned to a XAML MediaElement or HTML5 video component for playback of any media file format supported by FFmpeg. This FFmpegInterop component can be used as a template to utilize further functionality of the FFmpeg libraries. Moreover the FFmpegInterop object can be accessed by multiple programming languages including C#, CX/C++, and JavaScript.

Media Player Application Samples
Also included with the FFmpegInterop library for Windows are sample Media Player applications in C#, C++, and JavaScript for Windows 8.1, Windows Phone 8.1, and Windows 10. They demonstrate how to achieve the following:

Create a FFmpegInterop object that plugs easily into a XAML MediaElement or WinJS HTML5 Video component

Open a local file using FileOpenPicker and pass it as a stream to FFmpegInterop

Project the API to the different Windows Runtime languages (CX/C++, C#, and JavaScript)

Example: Using the FFmpeg MediaStreamSource Object in a XAML Media Element.

C++
Code: // Instantiate FFmpeg object and pass the stream from opened file IRandomAccessStream^ readStream = stream.get(); FFmpegMSS = FFmpegInteropMSS::CreateFFmpegInteropMSSFromStream(readStream, false, false); // Pass MediaStreamSource to Media Element mediaElement->SetMediaStreamSource(FFmpegMSS->GetMediaStreamSource);
Click to expand...

C#
Code: // Instantiate FFmpeg object and pass the stream from opened file IRandomAccessStream readStream = await file.OpenAsync(FileAccessMode.Read); FFmpegMSS = FFmpegInteropMSS.CreateFFmpegInteropMSSFromStream(readStream, false, false); // Pass MediaStreamSource to Media Element mediaElement.SetMediaStreamSource(mss);[/quote] To submit feedback, pull-requests, or issues, please check out the GitHub repo: Microsoft/FFmpegInterop

If you have a suggestion for other open source projects that would help you make great applications, please let us know in the comments.

For more information about Microsoft’s involvement with open source check out these sites:

https://msopentech.com/

http://azure.microsoft.com/en-us/com...urce-software/

[/quote]
Source: http://blogs.windows.com/buildingapp...-applications/

:)

Abi99 (2) · Jun 4, 2015

mp4 recordings with E72 need converting

Nokia E72 » Menu » Media » Recorder » Options » Settings » Recording quality

MMS compatible: AMR

Standard: 8 kHz 16 bit PCM in a WAV file

High: MPEG-4 with a 48 kHz AAC audio stream in a MP4 container/file

To use this in Audacity, you need FFmpeg, and you need FFmpeg with MPEG-4 enabled (which is disabled by default normally). I have not tried but
this FFmpeg installer has MPEG-4 on board – not sure if Audacity is compatible with that particular version. Anyway, more about
this
here …

At the end, you might have to compile FFmpeg yourself because you need not just ‘FFmpeg’ but ‘FFmpeg including MPEG-4’. Anyway, I guess this is the best route because you do not need any additional conversions steps or tools which might reduce quality –
and it is free.

Sam___ · Jun 4, 2015

Saving audio files in .WAV format

Any way around it?

Not that I know of. By default it saves in the mpeg-4 audio format. If you need the files in PCM you'll need to convert them using a 3rd party application such as VLC Player, Winamp or ffmpeg.

-Sam

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