I'm using MediaPlayer to open a video and DrawingContext.DrawVideo() to get a specific frame from a video source.
The problem is that I can't know if the MediaPlayer is positioned at the right place.
Therad.Sleep(500) is a hack.
Is there another easy way of getting frames from a video source? Or should I start looking for a DirectShow solution?
There's a somewhat elderly but potentially useful implementation of frame grabbing with a MediaPlayer here:
dlaa.me/blog/post/8921665
Here is the simple structure of the media grabber:
LoadVideo();
//Add event handler to the Changed event.
GetFirstFrame();
//Change video Position.
//When the Changed event fires:
GetCurrentFrame();
Related
I have a WPF application which dynamically loads video or image files(depending on user's choice, to a MediaElement control.
It is working fine when it is a video and gets the MediaEnded event fired on ending the video.
But when I load an image, the MediaEndedevent is fired within 5 seconds.
Is it a default value? or can I change it programmatically?
Is there any property to change this interval or disable such an option?
Is it possible to make it paused until a specific action?
I have set the following properties as follows
MediaControl1.LoadedBehavior = MediaState.Manual;
MediaControl1.UnloadedBehavior = MediaState.Manual;
MediaElement is a (very thin) wrapper around Windows Media Player (or rather - uses the same framework which is used by Windows Media Player). If you open an image in Windows Media Player - you will see it will "play" it like a slideshow (even for 1 image), for about 5 seconds. That's why you get MediaEnded event in 5 seconds - Windows Media Player plays slideshow with your image for that duration. I doubt there is a way to change this from WPF (because it's behavior of external program\framework, not related to MediaElement itself) and I'm not aware of the way to change this for Windows Media Player (and even if there is such a way - it will have global effect and you probably don't want to modify your clients computer in such a way).
To solve your problem - just don't use MediaElement for displaying images - use something like Image control. If you have really strong reasons to do that - you can pause MediaElement with Pause method after your "slideshow" has been loaded, then it will not fire MediaEnded event. All in all - I cannot imagine any use case where you really have to use MediaElement for images.
You can repeat the media when you load image. Handle MediaEnded event like this:
void me_MediaEnded(object sender, EventArgs e)
{
//play video again
mediaElement.Position = new TimeSpan(0, 0, 1);
mediaElement.Play();
}
Additionally see this. It may help:
https://stackoverflow.com/a/3406857/5675763
I'm writing a UWP application which contains the MediaPlayer object. I am wanting to program a stop button which stops the media and sets the media to black however I can't find an approach to do it short of loading a short 'black' clip as an internal asset or hiding the element via the compositor.
The MediaPlayer does not have a function for stop, only play/pause and further, setting the media source to null simply pauses playback and freezes on the last frame shown rather than dropping to black.
Any suggestions would be much appreciated.
I recently had a related problem that boiled down to unloading media from a MediaPlayerElement.
If you navigate away from a page when playback is active, the MediaPlayerElement would not suspend or unload a playback in progress so the user would keep hearing the audio. If you re-open player's page, a new instance of a player control will be created and user may hear multiple audio tracks at once (although this requires different media sources). So it was essential to unload the media at some place like player's Unloaded event handler, page Unloaded handler, or OnNavigatingFrom/OnNavigatedFrom overrides.
Anyway, the code below stops and unloads a video/clip/media from the MediaPlayerElement.
MyMediaPlayerElement.MediaPlayer.Pause();
MyMediaPlayerElement.Source = null;
Actually, a null assignment line works just fine as a stop-and-unload, but since as of now (3/19/2018), MS documentation doesn't seem to cover how nullifying the source supposed to work, I prefer to keep an otherwise unnecessary call to Pause() here as well.
The MediaPlayer does not have a function for stop, only play/pause
As you known, MediaPlayerElement doesn't have stop method at default. Since MediaPlayerElement is newly for version 1607, for earlier version of Windows 10 we use MediaElement instead, so you can simply use MediaElement instead. MediaElement has Stop method, and after you invoke the stop method, the MediaElement will show black and set the media to begin which is just what you want. Code as follows:
<MediaElement x:Name="mediaelement" AreTransportControlsEnabled="True" Height="400" Width="400" AutoPlay="True" Source="http://distribution.bbb3d.renderfarming.net/video/mp4/bbb_sunflower_1080p_30fps_normal.mp4"></MediaElement>
<Button x:Name="btnstop" Click='btnstop_Click' Content="stop"></Button>
Code behind:
private void btnstop_Click(object sender, RoutedEventArgs e)
{
mediaelement.Stop();
}
I want to play a video from the Internet in WPF. I used the code below. It can play the video but it always breaks down and the speed is very slow. I don't know how to solve this problem.
mediaElement.MediaFailed += mediaElement_MediaFailed;
mediaElement.LoadedBehavior = MediaState.Play;
mediaElement.Source = new Uri(#"http://media2.neu6.edu.cn/hls/cctv6hd.m3u8", UriKind.Absolute);
As I understand this is a long term issue with Media Element itself. Try using WPFMediaKit
instead.
I'm using the Video Source Player control from AForge.Controls to play a few video clips within a winforms application.
The code is something like this.
string fileName = #"C:\path\to\file.example";
videoSourcePlayer.VideoSource = new AForge.Video.AsyncVideoSource(new FileVideoSource(fileName), true);
videoSourcePlayer.Start();
The video file includes both audio and video streams, however as far I'm aware the control only handles video and not audio.
How can I then play the audio stream in a synchronous fashion with the video source player control?
Thank you.
EDIT:
The Video Source Player control has a event named NewFrame, which allows to determine the precise video position which could be useful to keep the audio being played synchronized with the video.
Since you mentioned:
I'm only looking for other alternative in which is possible to
reproduce the audio contained the video file and somehow keep it
synchronized with the video player control...
Maybe you can have a better luck by using a ElementHost and using WPF media control.
If this solution is eligible for you follow this steps:
Create a new WPF UserControl and add to your WindowsForms app.
In this UserControl add a media element and configure the way you want.
Build the solution.
Now in the toolbox must appear YourSolutionName Controls and you controls must be there.
Just drag it to your WindowsForms app and it must create an ElementHost.
I've created the UserControl as follow:
<MediaElement Name="VideoMediaElement"
Source="Media/Wildlife.wmv"
LoadedBehavior="Manual"/>
Just remember in this example this file must be side-by-side with your app in a Media folder. If you miss this step it will give you the strange and not helpful error 0xC00D11B1.
The loaded behavior Manual will give you the chance to control de video more freely.
After that you can do whathever you want in this UserControl like create Play and Pause:
internal void Play()
{
this.VideoMediaElement.Play();
}
And to access them in WindowsForms do this:
private void WindowsFormsButton_Click(object sender, EventArgs e)
{
var videoControl = this.MyElementHost.Child as VideoUserControl;
videoControl.Pause();
}
Hope this helps. WPF MediaElement is much more easy to seach for than other libs.
How can I use trackview or timeline in Naudio in C#?
Here is my code and it's not working.
I want to see my line going as track is playing.
NAudio.Wave.WaveStream pcm = NAudio.Wave.WaveFormatConversionStream.CreatePcmStream(new NAudio.Wave.Mp3FileReader(open.FileName));
customWaveViewer2.WaveStream = pcm;
stream = new NAudio.Wave.BlockAlignReductionStream(pcm);
trackView1.NowTime = stream.CurrentTime;
Unfortunately, TrackView and TimeLine are not completed controls, and you would be better off writing your own custom control to place a vertical line at a position that represents the now playing time.
You would probably be best using a timer to invalidate your custom wave viewer, and in the Paint method, drawing a vertical line that represents the current play time.