I'm trying to play a HDHomeRun Connect Video source from a url in the following format: http://x.x.x.x:xxxx/auto/v4.1. This video source is an MPEG2 video encoding and AC3 audio encoding.
I've tried using the Samsung Tizen.TV .NET sample with the following source but the video never plays.
_player = new Tizen.Multimedia.Player();
var mediaSource = new Multimedia.MediaUriSource(uri);
_player.SetSource(mediaSource);
var display = new Multimedia.Display(Window.Instance);
_player.Display = display;
await _player.PrepareAsync();
The player state gets stuck in preparing, and the await _player.PrepareAsync() call never finishes. It is worth noting that I'm using the Tizen Samsung TV Emulator. Do I need to transcode the stream from the HDHomeRun to be playable? Are there any other measures I might be missing for the Video to play?
Ultimately, the Display property of the player wasn't being set correctly. The property that worked for me (found from investigating the JuvoPlayer code was this:
var display = new Multimedia.Display(((FormsApplication)Forms.Context).MainWindow);
_player.Display = display;
When you are to develop a Tizen .NET application, please be aware of which UI framework your project is targetted for among 3 different types: Xamarin.Forms, (pure) ElmSharp, and Tizen.NUI.
Unless your project is based on the Tizen.NUI framework, you shouldn't use Tizen.NUI.Window.Instance and types in Tizen.NUI namespace in any case. Instead, you will have to use types of ElmSharp or Xamarin.Forms.Platform.Tizen namespace for platform-specific code in your application.
Since the internal implementation of Xamarin.Forms for Tizen is based on ElmSharp, FormsApplication.MainWindow will return a ElmSharp.Window instance which can be used to instantiate a Tizen.Multimedia.Display object. That's why the code in your answer worked.
Related
An alternative title could be: What happened to PIN_CATEGORY_STILL?
I am currently comparing images that were captured using DirectShow and PIN_CATEGORY_STILL with images that were captured using UWP MediaCapture.
On the device I am testing/playing around with DirectShow and MediaCapture, DirectShow detects a PIN_CATEGORY_STILL but I am not able to initialize an instance of MediaCapture with anything other than PhotoCaptureSource.VideoPreview.
MediaCaptureInitializationSettings settings = new()
{
VideoDeviceId = someDeviceId,
PhotoCaptureSource = PhotoCaptureSource.Photo
};
MediaCapture capture = new();
// this throws an exception
// "The capture source does not have an independent photo stream."
await capture.InitializeAsync(settings);
At this point I'm not even sure if PhotoCaptureSource.Photo is meant to be used as an equivalent to PIN_CATEGORY_STILL.
Images captured with PIN_CATEGORY_STILL are way brighter in a dark environment and have a much better quality (in file size and resolution) (which is clear to me, since I am using PhotoCaptureSource.VideoPreview for MediaCapture).
Considering this resource Win32 and COM for UWP apps, it seems like UWP MediaCapture does not use DirectShow underneath but MediaFoundation (which is meant to be a successor for DirectShow).
This article led me to this StackOverflow question Media Foundation is incorrectly marking still image capture stream descriptors as video capture, which basically states that MediaFoundation has no PIN_CATEGORY_STILL but returns 1 FPS as video capability for such devices (or profiles).
Since I am not directly using MediaFoundation nor C++, I tried testing this by querying GetAvailableMediaStreamProperties:
private void Foo()
{
var videoPreviewProperties = GetEncodingProperties(MediaStreamType.VideoRecord);
var photoProperties = GetEncodingProperties(MediaStreamType.Photo);
var videoRecordProperties = GetEncodingProperties(MediaStreamType.VideoPreview);
}
private List<VideoEncodingProperties> GetEncodingProperties(MediaStreamType streamType)
{
// MediaCapture was previously initialized with PhotoCaptureSource.VideoPreview
return MediaCapture.VideoDeviceController
.GetAvailableMediaStreamProperties(streamType)
.OfType<VideoEncodingProperties>()
.ToList();
}
None of these returns a VideoEncodingProperties with only 1 FPS.
To test MediaCapture any further I tried some of the sample applications from here UWP sample. I tried CameraAdvancedCapture, CameraOpenCV and CameraManualControls, but the results were not nearly as good as good old PIN_CATEGORY_STILL.
What happened to PIN_CATEGORY_STILL?
Is there any way to capture images without DirectShow/PIN_CATEGORY_STILL and still keeping this level of quality?
Any enlightenment is much appricated.
I'm trying to find a solution to play 'HLS/TS' content from URI.
I'm coding on VS (xamarin forms/cross platform) but can't found a way or Renderer for my Tizen project.
at the moment I have this function ( But it's not compatible with updated version of xamarin.forms) and it can't play HLS/TS stream (just video content 'like mp4/mkv'):
public async Task PrepareAsync()
{
State = PlayerState.Preparing;
var display = new Multimedia.Display(Forms.Context.MainWindow);
_player.Display = display;
await _player.PrepareAsync();
State = PlayerState.Prepared;
}
Thank you
It may be possible that ExoPlayer can help you.
ExoPlayer is an open source library that exposes the lower-level Android audio APIs. ExoPlayer supports high-performance features like DASH and HLS streaming that are not available in MediaPlayer. You can customize the ExoPlayer code, making it easy to add new components. ExoPlayer can only be used with Android version 4.1 and higher.
To make use of ExoPlayer, add the following code to your MainActivity (Xamarin):
((MediaManagerImplementation)CrossMediaManager.Current).MediaSessionManager = new MediaSessionManager(Application.Context, typeof(ExoPlayerAudioService));
var exoPlayer = new ExoPlayerAudioImplementation(((MediaManagerImplementation)CrossMediaManager.Current).MediaSessionManager);
CrossMediaManager.Current.AudioPlayer = exoPlayer;
and also have a visit here:
Run iptv & ts urls in android
https://github.com/google/ExoPlayer
https://blog.xamarin.com/play-audio-and-video-with-the-mediamanager-plugin-for-xamarin/
Hello I displayed 1 webcam preview in UWP and that was a success.
But now I want to use 2 camera's preview on my program or be able to choose between the two cameras while connected 2 cameras on computer.
When I run 1 webcam preview, I referred to documentation on using MediaCapture and it was good.
But now I don't know how to display 2 camera previews or select a one between cameras.
Is it impossible?
Yes, it is possible :-) . The MediaCapture class takes the default camera when you call the InitializeAsync method without parameters, but there is another overload that allows you to specify the device ID.
The documentation shows how to discover video capture devices:
DeviceInformationCollection devices =
await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);
Now you can initialize multiple MediaCapture instances like this:
foreach ( var device in devices )
{
var mediaInitSettings =
new MediaCaptureInitializationSettings { VideoDeviceId = device.Id };
MediaCapture mediaCapture = new MediaCapture();
mediaCapture.InitializeAsync(mediaInitSettings);
//do something with the media capture
}
Naturally, when you want to display multiple previews, you will need to have multiple CaptureElements, each set to the specific MediaCapture instance you want.
However this approach is quite simplified. To make sure the concurrent capture and preview is supported, you must first ensure to query only cameras that support device profile using MediaCapture.IsVideoProfileSupported method as shown in the documentation and then also check find a concurrency-enabled profile common for both cameras - MediaCapture.FindConcurrentProfiles, see docs. Only then you can safely create the two previews and know the app will not crash.
I'm trying to play a video using the AVPlayer and an AVPlayerItem.
Im using following code:
asset = AVAsset.FromUrl(new NSUrl(GalleryURL));
playerItem = new AVPlayerItem(asset);
playerItem.AddObserver(this, (NSString)"status", NSKeyValueObservingOptions.OldNew, IntPtr.Zero);
player = new AVPlayer(playerItem);
the property GalleryURL is one of the following:
1.) When saving a video to the gallery, i get this url from the ALAssetsLibrary instance call: WriteVideoToSavedPhotosAlbum(url, (galleryPath, error) => { ... });
where "galleryPath" is something like this:
file:///var/mobile/Containers/Data/Application/0D510365-4A63-425B-840C-A4E18BD870A8/Documents/...
this works fine, I can create the AVAsset and retrieve the AVPlayerItemStatus, especially the status "ReadyToPlay", via the added Observer.
2.) However when I retrieve a Video from the gallery, the url looks different:
assets-library://asset/asset.MOV?id=EB9FC214...
and in this case I'm not able to retrieve a working AVAsset
How can I get part 2 to create a working AVAsset, which I can use for video playback? I believe this works in iOS versions prior to iOS 11.
Landu Lu - MSFT helped me to find the answer:
He told me that there are 2 paths that I receive from the UIImagePickerController:
The asset-library path could not be used, maybe I have to remove the "assets-library:" part? but the path beginning with "file://" could be used. The problem of the plugin was, that the start of the url was cut off, there was no "file://" at the beginning. I manually added this string and it works! Thanks alot!
I have been fiddling with the Veridis sdk 5.0. I need to get the ANSI 378 template from a fingerprint image file. Here is a sample code for that.
var r = VeridisLicense.InstallLicense(myKey, string.Empty);
var bitmap = Bitmap.FromFile(imagePath) as Bitmap;
var sample = new BiometricSample(bitmap, 500);
var bioTemplate = new BiometricTemplate(sample, BiometricTemplateFormat.Ansi);
var data = bioTemplate.GetData();
However, the app crashes with ntdll heap corruption error after executing the InstallLicense line. If I omit that, I get Veridis.Biometric.BiometricException "Not started (Error #-4)" from BiometricTemplate constructor.
Can someone tell me what is going on here? I have the same problem while installing license with the dot net sample that comes with it. However, the demo application inside veridis sdk package does not give any error while installing the license.
I believe you forgot to call the static function BiometricCapture.StartSDK(eventListener)
You also will need a class that inherit from ICaptureListener. That new class will be your Event listener.