I am using AudioStreamer by mattgallagher to stream MP3 from server to iPhone app. I know how to get the progress of playing content, but how can I get the total duration of the media?
You need to use the duration property of the AudioStreamer object
AudioStreamer *audio = [[AudioStreamer alloc] init];
NSLog(#"%f", audio.duration);
Related
I am looking for the duration of a Video just recorded.
Code:
String file = Capture.captureVideo();
Media m = MediaManager.createMedia(file, true);
m.getDuration();
returns 0 on (PC, IOS, Android)
Thoughts?
Duration isn't available for most cases until after media playback was started since the media might be streamed this can take time but normally just playing the media will make duration return a valid value.
I have an app on the app store which plays a selection of videos. Currently all of the videos are in the .mov file format but this makes the size of the app rather large so i'm trying to use a different file format to reduce the overall size of the app.
I am trying to use the mp4 format as this is reducing the size of each video by more than a half but when I do, the app crashes when I try to play the video with the following error message:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[NSURL initFileURLWithPath:]: nil string parameter
I have used the following code for each video in my implementation file and changed the file name and type to match the new video so I don't understand why there should be a problem with the file path.
- (IBAction)playDaresWins:(id)sender {
NSURL *url = [NSURL fileURLWithPath:[[NSBundle mainBundle]
pathForResource:#"DaresWins" ofType:#"mov"]];
_moviePlayer =
[[MPMoviePlayerController alloc]
initWithContentURL:url];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayBackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:_moviePlayer];
_moviePlayer.controlStyle = MPMovieControlStyleNone;
_moviePlayer.shouldAutoplay = YES;
[self.view addSubview:_moviePlayer.view];
[_moviePlayer setFullscreen:YES animated:NO];
}
Am I missing something?
.mov isn't a video format or codec, it's a container. The developer documentation provides a list of supported video codecs, bit rates, and resolution (link here - I won't post them here as they can change from OS version to OS version).
However, I don't think that's the problem, because it looks as if you're getting an exception when you're creating the NSURL, not when you're playing the video. That suggests that the path you're providing for your video doesn't exist. Are you sure you have a) the right filename, b) the right extension (perhaps it's MP4 instead of MOV), or c) have added the movie file into your project correctly?
I'm migrating to use the UIActivityViewController for sharing in iOS6, but I can't figure out how to create email attachment objects to be included when sharing by email.
The corresponding code in iOS5 is:
MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
[picker addAttachmentData:data mimeType:#"application/XXX" fileName:fileName];
You have very limited control over UIActivityViewController, but if you're attaching well-know mime types, I found you can get it to work correctly by providing the associated file extension in a file URL. For example, if your attachment is a vCard, use the ".vcf" extension in the file URL:
NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
// The file extension is important so that some mime magic happens!
NSString *filePath = [docsPath stringByAppendingPathComponent:#"vcard.vcf"];
NSURL *fileUrl = [NSURL fileURLWithPath:filePath];
[data writeToURL:fileUrl atomically:YES]; // save the file
// Now pass the file URL in the activity items array
UIActivityViewController *avc = [[UIActivityViewController alloc] initWithActivityItems:
#[#"Here's an attached vCard", fileUrl] applicationActivities:nil];
[vc presentModalViewController:avc animated:YES];
For anyone wondering why their files aren't being shared using UIActivityViewController to apps like DropBox and other generic file handling applications, what you really want is a UIDocumentInteractionController.
Use it something like this:
class ViewController {
var openInController:UIDocumentInteractionController!
init() {
openInController = UIDocumentInteractionController(URL: docURL)
}
func shareDoc {
openInController.presentOptionsMenuFromRect(CGRectZero, inView: self.view, animated: true)
}
}
From what I can tell you can't do this with the UIActivityViewController -- I can't even manage to make it present HTML content for the message body -- so you may be better off using SLComposeViewController.
Our company has an application that receives bitonal TIFF images via fax or scanner and saves them to a database; currently, we display the images from the database using an ActiveX control, but now we want to use a Silverlight control to display those images instead. However, we are not able to display or save the images as bitonal TIFF images; using the following code in our ashx handler, we get a blank image:
pageno = Convert.ToInt32(context.Request.QueryString("page"))
'Get image data from database
Dim bmp() As Byte = ShowDocumentImage(documentID)
'Get current page of TIFF image as bitmap
Dim newBmp As Bitmap = GetTifPage(bmp, pageno)
Dim info As Imaging.ImageCodecInfo = Nothing
Dim ice As Imaging.ImageCodecInfo
For Each ice In Imaging.ImageCodecInfo.GetImageEncoders()
If ice.MimeType = "image/tiff" Then
info = ice
End If
Next
Dim enc As Imaging.Encoder = Imaging.Encoder.SaveFlag
Dim ep As New Imaging.EncoderParameters(2)
ep.Param(0) = New Imaging.EncoderParameter(enc, CLng(Imaging.EncoderValue.MultiFrame))
ep.Param(1) = New Imaging.EncoderParameter(enc, CLng(Imaging.EncoderValue.CompressionCCITT4))
If newBmp IsNot Nothing Then
newBmp.Save(context.Response.OutputStream, info, ep)
newBmp.Dispose()
End If
Instead, we have to save them as JPEG, which does display to the user but which also increases the bit depth and the size of the files; it also increases the time it takes to save the image. It takes about 6 seconds to convert a 1728x2079 JPEG to a byte array so that it can be uploaded to the database.
Is there a way to display and save the image as a bitonal TIFF, and/or a faster way to convert the image to a byte array?
As far as I know, support for TIFF images in Silverlight is very limited.
There are 3-rd party libraries that can help you with your task. I am personally recommend you to try LibTiff.Net library. The library is completely free (even for commercial use) and open source.
Source code package of LibTiff.Net contains Silverlight Test Application that shows how to asynchronously load and display TIFF images in a Silverlight app. It can display various TIFF flavors including bitonal ones.
You might find this answer to a similar question useful too.
I'm working with a ComponentOne (C1) silverlight PDF viewer control.
It has a "LoadDocument" method that accepts a "Stream".
I'm making an HTTP get call from my client app to get a PDF document.
This document, on the server side, has been streamed in through File.ReadAllBytes(), then converted to a base64 string using Convert.ToBase64String().
This string is sent across the wire back to my silverlight app where it's then reversely converted back into a byte array with Convert.FromBase64String(val).
Then I'm creating a MemoryStream with that byte array and passing "LoadDocument()" that memory stream.
The viewer is rendering nothing. It shows the toolbar and scrollbars, but the contents are blank and the save button is grayed out, suggesting that no document loaded.
I know for certain the file made it across because the byte array size on the client matches teh byte array pre-conversion on the server side.
Here's my code: (in the interest of time/space, i've truncated, removing validation, etc.)
SERVERSIDE
string sendingToClient = Convert.ToBase64String(File.ReadAllBytes(filePath))
CLIENTSIDE
byte[] image = null;
image = Convert.FromBase64String(stringFromServerCall);
MemoryStream stream = new MemoryStream(image);
docViewer.LoadDocument(stream);
edit As a potential workaround, I attempted to save the file into isolated storage with a ".pdf" extension. Then I use the IsolatedStorageFileStream to send to LoadDocument().
I've come to an actual error, it now says "PdfParserException was unhandled by user code: invalid file format (missing pdf header)"
Can anyone shed some light on this PDF header?
Here is an experiment I would conduct.
Add a button to your Xaml and on click use OpenFileDialog to get a FileInfo. From that FileInfo use its Open method to get a stream and pass that to docViewer.LoadDocument.
Now run it, click the button and select the same PDF document you are trying to send from the server.
If that succeeds you need to continue investigating your server streaming strategy. On the other hand if you still have the same problem, well it doesn't get more raw than that. Try other PDF files and start investigating the PDF component. Have you ever actually used it successfully, if so how does this current usage differ.
you should get the stream pointer back to 0 ,so this should do the trick
byte[] image = null;
image = Convert.FromBase64String(stringFromServerCall);
MemoryStream stream = new MemoryStream(image);
stream.Position = 0;
docViewer.LoadDocument(stream);