I know the iPhone can play video on an external screen if you have the Apple component output cable. I also know you can write an app that plays video. Is there a way to put those two things together and write an app that will play video specifically on an external screen?
This is currently not possible with the iPhone API. I have heard of apps that have done it on jail-broken phones, but there is not Apple-approved way of doing it at this time.
This can be done using private private APIs, but it won't get in the store. This guy wrote a class to do it here: http://dragonforged.com/DFVideoOut.shtml Haven't used it myself, but it looks very simple.
Related
I'd like to record what the iPhone is currently outputting. So I'm thinking about recording audio from Apps like Music (iPod), Skype, any Radio Streaming App, Phone, Instacast... I don't want to record my own audio or the mic input.
Is there an official way to do this? How do I do it? It seems like AVAudioRecorder does not allow this, can somebody confirm?
Officially you can't. The audio stream belongs to the app playing it ,and iOS.
The Sandbox paradigm means that a resource owned by your App can't be used by another App. Resource here means Audio/Video stream or file. Exceptions are when a mediator like Document interaction controller are used.
If you want to do this you'd have to start with deducing AVFoundation's private methods and find out if theres a way there. Needless to say this it wouldn't be saleable on the App store and will probably only be possible on a jailbreak.
Good Luck.
TLDR;
This is only feasible only from time to time, as it's a time expensive process.
You can record the screen while listening your songs on Spotify, Music or whatever music application.
This will generate a video on your Photos application. That video can be converted on MP3 from your computer.
Actually, this is not true. The screen recordings will not actually have the audio from Apple Music at all, as it blocks it. Discord also uses this pipe as well, so you cannot record Discord audio either this way.
I am developing a cocos2d app.
It's almost completed but now I want to record the activities of my app as a video file, including sound produced by the app.
How can I implement this?
Anybody can help me.
Please suggest a way to implement this.
Thanks in advance.
The question isn't new, but since it isn't answered I thought I'd pitch in:
We provide an SDK called "Everyplay" that allows you to do exactly what you're looking for. It's free to use, and is lightweight.
We provide out-of-the-box integrations for Unity3D, cocos2d (1.x, 2.x), cocos2d-x, and you can of course integrate to a custom OpenGL-based game engine.
The documentation is available at https://developers.everyplay.com/doc
The documentation contains an example app key to use when developing, but you can of course sign up for your own client key at https://developers.everyplay.com/
There are many options - and the fact that your app is cocos2d doesn't matter much.
iSimulate works well. You can actually play the app on your device and record the gameplay as well as the touch events. This is important if you want to show user interaction in your app. You run the app in the simulator but you control it from your device.
If you just want to record the app interaction without caring about showing users the touch events, you can use Screenflow or Jing or some other recording software. I used to use Jing (free) but Screenflow works better for me and it also lets you create more advanced video like a trailer with effects. edit You should be able to capture touch events through the simulator with Screenflow too. You can choose to show them or not. And can use different indicators for those events.
Search on google for mac or iphone recording software. There are many options. I had the best experience with Screenflow because I wanted to make a trailer and gameplay video.
I'm developing similar application which allow user record the activity within cocos2d-x activity.
I'm using screen capture method and then combine it using FFMPEG. The performance wasn't too good thought but is the easiest way to achieve.
I'm not very well versed in the iPhone and Android API, so please bear with me if this is a stupid question.
As I understand it, Square's card reader works by converting the magnetic information on the card stripe into an audio tone that its software can then process. [1]
In a similar way, is there a way to somehow read what exactly is being displayed on the device screen simply through a small device inserted into the audio jack on that device?
[1] http://www.quora.com/How-does-Squares-hardware-work
It's not quite clear what you wish to achieve. You can indeed make an app that would output a representation (perhaps audio frequency-shift keying?) of the screen's contents to the iPhone's audio jack.
The iPhone (and other iOS-based devices) use TRRS connectors for bi-directional audio (and hence arbitrary modulated data) communication and there are well-supported publicly-documented APIs for using these interfaces.
That said, if you're writing your own app: why would you want to output the contents of the screen? If you are developing the app in question, why not transmit the salient data in a more effective manner? Which leads me to my next assumption:
You want to read what's being displayed on the device's screen at any time, not just when an app of your creation is open. In this case, the answer is that it is not possible, with the possible exception of a jailbroken solution. That said, I can't imagine a jailbroken solution being useful much longer on account of iOS 5 introduced "display mirroring" by means of AirPlay.
On Android, I have no idea. :-)
No. The screen is not connected to the audio jack.
I think you can make an app to take a screenshot and then encode that photo as music to play it.
It won't sound good though :)
For this kind of task, there is built in camera
I'd like to stream video from the camera on an iOS device to a receiver via wifi, in effect turning the device into a wireless webcam. Is there a way to build a small app that captures video input on an iOS app and sends it via an RTSP stream or similar?
As this is an ad hoc experiment, I'm not concerned about App Store guidelines and can jailbreak if necessary.
If I interpret your question correctly you more or less need to solve four problems:
Get the camera feed.
Convert/encode this to the right format.
Stream the data.
Prevent the phone from locking itself and going into deep sleep.
The first one is fairly simple and Apple has as always provided good documentation and examples -> API link. Make sure you check out their example in the end as you will get a CMSampleBufferRef data object back.
For the second and third part, you should check out the CFNetwork framework and specially CFFTPStream for streaming using FTP.
If your are only building this for yourself then you can always turn off the Auto-Lock feature in the settings. If you on the other hand would like to distribute this to other users you could use a trick to play a mute sound every 10 seconds. This is more or less how all the alarm clocks work in the App Store. Here's a tutorial. =)
I hope I helped a little bit at least.
Good luck and best regards!
I'm 70% of the way to doing the same thing. Here's how I did it:
Capture content from video input
Chop video into files for use in HTML Live Streaming.
Spin up a web server on the iPhone and make the video files available.
Connect to the IP address of the phone and viola! you've got live streaming video.
Last time I touched the code I was trying to debug my Live Streaming not working. I'll try and get my source code posted on github this weekend, if you'd like to take a look.
I have run into a bit of a problem. I built an iPhone app that streams my podcasts via the MPMoviePlayerController. Apple will not approve it because it can use too much bandwidth over the Carrier Network. So their workaround is to use a Stream Segmenter. I am unable to install a stream segmenter on my server. Are their ANY other solutions people have come up with that can help me stream my podcast to iPhone devices? Even if I have to make it a Web Application as opposed to a native application.
Thanks,
John
You could use a simple service like Encoding.com to create iphone segmented ondemand versions of your files for multi bitrate adaptive playback. You could also provide a high and low quality and only display the high when the reachability class shows that your using wifi. I had to do the second option to get one of my apps to pass approval. Hope this helps!
Well if you don't want a native app, I think you can just put a video link on a webpage and when the user clicks it Quicktime will take over and play the file. It will play the file as it downloads it.
I don't have any experience streaming large files over the iPhone, so I can't help guide you on alternatives and keeping it a native app.