My question is if there is any built-in interpretation of metadata by the video player in iOS. I know one can add meta-data to a video and interpret it within a custom application as shown here.
In iOS on ipod or iphone, an HTML video is opened within the native player. I would like to display a message above or below the video for a short duration at the beginning. Since I cannot control the native player I thought there might be some built in metadata interpretation that could be used to perform this. I have not been able to find any information on this.
Any help is appreciated.
The blog you've posted includes details on using the native player MPMoviePlayerController to display meta data, which is pretty cool actually. You learn something new every day! If you're making a Phonegap App I suppose you could write a plugin to do this?
Or alternatively, have a look at this other OS question which appears to suggest that it is possible - though not seemingly with metadata embedded in the actual video. Apparently this works on iOS.
Reading metadata from the <track> of an HTML5 <video> using Captionator
Related
I have a question about video stream processing. Is it possible to get access and modify real time video stream during recording (f.e. I want to add some text to video)? I can do this as a preview by getting separate frames, but I'm looking for tool which will allow me to store video with my text in video frames.
Probably there is already some libraries/tools available (but I haven't found any yet).
Try GPUIMAGE library. It can help you.
You should check AVCam sample code by apple. That might be a starting point.
I'm doing a project where we want to create a video inside an iPhone app and upload it to YouTube. I've seen the you upload the video using Google's Data API (http://code.google.com/p/gdata-objectivec-client/).
However it seems that you need to upload the movie as an actual movie. Has anyone got any experience on making a movie in a format that YouTube will accept via the Data API and care to give me a few pointers on what would work?
(Just a quick note, I cannot use hidden APIs for this project)
Many thanks
Youtube accepts a broad range of formats. Just try it yourself, use any free video editing software to create a short movie and upload that movie to youtube, you're almost guaranteed that youtube would be able to process that.
The second part of your question is whether ios is able to produce a movie from still frames, then the answer is - yes - and you want to look at AVFoundation, particularly at AVAssetWriter
I have a number of music tracks which I would like the user to be able to preview a small clip of each.
These tracks are on a server.
How is media streamed into the app and which player is used? Can a custom player be created to play the clips within the view, without e.g. quicktime player opening?
Thanks
If you don't want to use QuickTime, the matter is rather complex, as far as I know. Fortunately, a lot of work already has been done for you by Matt Gallagher. See this excelent post for further information. The code, that he provides works perfectly in my application.
I am working on an application that will stream music from a server of mine from an iPhone application.
This is my first iPhone app so I am a bit confused :
What would be the best way to do
this?
Is there something already built in
that I could use, like a MP3 player
that I just need to point toward the
correct server?
Do I need a streaming server to do
so?
I'm relatively new to Objective-C/Cocoa (touch), but I have read an article on the cocoawithlove site titled "Streaming and playing an MP3 stream" and tested the sample code on my iPhone and it works perfectly. I don't know about the licensing or anything, if you would be able to use it, but I'm sure someone or even you can figure that out.
Sorry again for not being able to provide any more information or even a link. This is my first answer on SO and cannot post hyperlinks :(
(edit: Here's the link: Streaming and playing an MP3 stream)
I am looking for alternatives to the MPMoviePlayerController on the iPhone. As a video player its functionality is very limited. According to the class reference there is no way to get the current play back time or set a new time, for example. It's just play and stop.
Are there any middleware solutions out there for iPhone video playback that offer more functionality? CRI has something in development but it has not been released. I haven't been able to find anything else.
Thanks.
Keep in mind that even though a project is GPL, that does not mean you can't contact the author's about an LGPL option on the underlying code.
A possible roll your own solution would be to use openGL as a compositing surface for the video and obtain a behind the scenes library like ffmpeg if you need to process specific video types.
NeHe has an example of rendering AVI's to openGL: http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=35
FFMpeg has recently been ported to iPhone and is an LGPL based product: http://geek.thinkunique.org/2008/03/05/ffmpeg-on-the-iphone/
(Note: There is some debate over the commercial use of LGPL on iPhone because the license references the phrase "dynamic" when referring to library linkage, which iPhone doesn't allow. I have not seen any project teams balk at their code being used on the iPhone statically, but you should contact the authors directly for clarification.)
Another (though GPL) version of an OpenGL video player is: http://code.google.com/p/glover/
What your getting through a solution like this is basically a bypass on the iPhone/Mac/CALayer specific technical details and leveraging an existing knowledge base of video through OpenGL which although not extensive, is still broadly supported.
If you are dealing with a specific video style, then you may want to see if a library is avaiable for the specific video format direct from the vendor instead of using a multi-purpose tool like FFMpeg. Once you have the compositing working, the video can come from most any library.
Barney
You could use AVPlayer. See the documentation
You can then get the current playback time with currentTime and seek to a specified time with seekToTime:.
You have to direct the visual output of an AVPlayer instance to an AVPlayerLayer object (subclass of CALayer). See the first listing here.
VLC has been ported to iPhone but not using the official SDK.