I need to show some text on the running video in my iPhone application. I am using AVFOUNDATION.FRAMEWORK to stream my videos. What exactly I need is that, for example, if my video length is about 5 minutes then I want to show text on the video from minute 3 to minute 4 then at the end of the video for few seconds.
I have placed a UIView with UILabel on the video view, which is properly showing the text on it but it is constantly there. I want to limit this text so that whenever I want to show it on my video it comes up.
Is it possible?
I think you should set a NSTimer with delay and fire it when you want to show the label and again use another timer to hide it and so on. ie, set timer according, you will have to manually set it.
Related
hi i want to play a video and it pause after a fixed time like 3:12 mm at the same time i want to show one view to user where form is there and when user fill form and submit the button then again play the video.
My Suggestion is use two instance of videoPlayer object. so when pausing first one make it 2nd player to play the video.
And Please use hidden property.
I have a ~30 minute mp3 file being played by an AVAudioPlayer. Sometimes, audioPlayerDidFinishPlaying:successfully is called (with the successfully flag set to TRUE), even when it is only 5 minutes into the clip. It happens infrequently, but it can happen at any position in the clip.
I've only noticed that it happens when the user is pressing a button on the user interface, or moving a slider. And the more quickly they press buttons on the user interface, the more likely it is to happen it seems.
Any ideas what could be causing this, or how to fix it?
MORE INFO:
Only 1 sound is played at a time. No sounds are played for button actions. The AVAudioPlayer is declared locally in my main ViewController. I've tested on an iPhone 3GS and an iPhone 4s. The problem happens very very rarely on the iPhone 4s. It's much more frequent on the 3GS.
OK, I had the same problem starting yesterday. Don't whether we were having the same problem but I will throw it here
In the slider ValueChanged event handler, I tried to update the view elements based on the new position of the slider. But within the updateViewMethod, I called another
slider.value = self.player.currentTime;
Removing that solved my problem.
So in short, your timer's callback should update the slider, but slider valuechanged handler should not redo the work.
I am trying to see if it is possible to record a video from the iPhone's camera and write this to a file. I then want the video to start playing on the screen a set time after. This all needs to happen continuously. For example, I want the video on the screen to always be 20 seconds behind what the camera is recording.
Some background:
I have a friend who is a coach and would like for his players to be able to see their last play. This could be accomplished by a feed going to a TV from an iPad always 20 seconds behind what is recorded. This needs to continually run until practice is over. (I would connect the iPad to the TV either with a cable or AirPlay to an Apple TV). The video would never need to be saved and should just be discarded after playing.
Is this even possible with the APIs AVFoundation offers? Will the iPhone let you write to a file and read from a file at the same time to accomplish this? Any other better way to accomplish this?
Thanks for your time.
Instead of writing to a file, how about saving your frames in a circular buffer big enough to hold X seconds of video?
The way I would start to do this would be to look at what's provided in AVCaptureVideoDataOutput and its delegate methods (where you can get the frame data from).
I'm using AVPlayer to show a live stream. Works fine. Part of my app requires a modal view to appear over the video. Actually, it flips the video view to show the modal view. I want the video's audio to keep playing, which it does fine.
However, the problem is when I return to the video. The video's visuals speed up for a few seconds, Benny Hill style, to compensate for the period they were off the screen. Then the video starts playing normally. Is there a way to stop this speed up? If not, can I remove the visual element until the speeded up bit stops.
I want to add a "subtitles" to a video played in an iPhone app. I don't want those subtitles encoded into the video itself - ideally I'd love to have a view showing the video (with pause, play, volume and such standard controls) together with a view displaying the text that changes together with movie time changing.
If I drawn that, it's something like this,
So, basicly, I would need a way to get a method called when movie is playing, and then synchronize the text displayed on the label with the movie timing.
Anyone used a solution that was able to do it?
I've recently done something that syncs graphics to times in an audio track. The way I did it was by using the currentPlaybackTime property of the MPMediaPlayback interface (which the MoviePlayer controller should also conform to). This returns the seconds elapsed in the media, in a double (typedef'ed as NSTimeInterval). The actual synchronisation in my app was not done in notifications, as I couldn't find any resembling a "tick", but instead I created a timer, calling a function queried the currentPlaybackTime, and updated the graphics based on this.
In terms of your implementation, I would assume you have some kind of system for associating label text (subtitles) with a particular time. You could then compare the text's time range with the time returned from currentPlaybackTime to find the correct text to display.