I want to show preview like youtube when we seek the seek bar on av player but i didn't get any appropriate solution for this. How i can achieve this. any help would be appriciated.
I found myself in a situation where I need to simulate audio playback to trick OS controls and MPNowPlayingInfoCenter into thinking that an audio is being played. This is because I am building a player that plays multiple audio tracks, with pauses in-between creating one, continuous "audio" track. I have already everything setup inside the app itself, and the lock screen controls are working correctly but the only problem I am facing is while the actual audio stops and a pause is being "played", the lock screen info center stops the timer, and it only continues with showing correct time and overall state once another audio track starts playing.
Here is the example of my audio track built from audio files and pause items:
let items: [AudioItem] = [
.audio("part-1.mp3"),
.pause(duration: 5), // value of type: TimeInterval
.audio("part-2.mp3"),
.pause(duration: 3),
... // the list goes on
]
then in my custom player, once AVAudioPlayer finishes its job with current item, I get the next one from the array and play either a .pause with a scheduled Timer or another .audio with AVAudioPlayer.
extension Player: AVAudioPlayerDelegate {
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
playNextItem()
}
}
And here lies the problem, once the AVAudioPlayer stops, the Now Playing info center automatically stops too, even tho I keep feeding it fresh nowPlayingInfo. Then when it hits another .audio item, it resumes correctly and shows current time, etc.
And here lies the question
how do I trick the MPNowPlayingInfoCenter into thinking that audio is being played while I "play" my .pause item?
I realise that it may still not be clear, what I am trying to achieve but I am happy to share more insight if needed. Thanks!
Some solutions I am currently thinking about:
A. Keeping 1s long empty audio track that would play on loop for as long as the pause is needed to play.
B. Creating programatically empty audio track with appropriate lenght and playing it instead of using Timer for keeping track of pause duration/progress and relying completely on AVAudioPlayer for both .audio and .pause items. Not sure this is possible though.
C. Maybe there is a way to tell the MPNowPlayingInfoCenter that the audio keeps playing without the need of using AVAudioPlayer but some API I am not familiar with?
AVAudioPlayer is probably the wrong tool here. You want AVAudioPlayerNode, which is slightly lower-level. Create an AVAudioEngine, and attach an AVAudioPlayerNode. You can then call scheduleFile(_:at:completionHandler:) to play the audio at the times you want.
Much of the Apple documentation on AVAudioEngine appears broken right this moment, but the links hopefully will be available again shortly in the links for Audio Engine Building Blocks. (If it stays down and you have trouble finding docs, leave a comment and I'll hunt down the WWDC videos and other tutorials on using AVAudioEngine. It's not particularly difficult for simple problems.)
If you know in advance how you want to compose these items (and it looks like you may), see also AVMutableComposition, which lets you glue together assets very efficiently, including adding empty segments of silence. See Media Composition and Editing for the various tools in that space.
Can anyone please tell me how to play and pause youtube videos? I mean to say when I pause one video it should hide and exactly at the same position another video should come . And when I pause this then again the previous video would come.Remeber - each time I toggle, the previous video must pause.
I am using You tube API and need to embed two videos over there.
I am having trouble resolving this ... please help...
I am trying to make a video player with custom audio effects. To perform an effect I've written an audio unit. To play video stream I use AVPlayer with muted sound. The problem is that audio and video are out of sync. And it gets awful when I pause and resume the playback.
Could you please suggest any ideas about how to sync the two things? Maybe use something else instead of AVPlayer?
Thanks in advance.
I shall answer my own question.
There is a thing called MTAudioProcessingTap. It allows for doing audio manipulation stuff just like an audio unit but inside AVPlayer.
There's a link for more details: https://chritto.wordpress.com/2013/01/07/processing-avplayers-audio-with-mtaudioprocessingtap/.=
I am working on a kids ABC learning app which will be somewhat like this app.
Petting Zoo
The user can do these gestures... Swipe UP, DOWN, LEFT , RIGHT and TOUCH and each gesture has a small animation clip (approx duration 1 -3 secs each ) linked to it like the character jumping on Swipe UP, etc. There will also be an IDLE loopable movie which will be playing continuously when there is no input from user.
So I am trying to use videos in MP4 and M4V format for these gestures but the problem is that the videos are lagging just before playing. Means they dont play instantly upon doing a gesture but take a time of say micro second to load and play.
I am looking for output like the video above. You can see that the animations are so responsive and do not hang even for little time.
My developer once achieved such smooth output with the MP4 video clips but those clips didnt have audio embedded in them and then when he used videos with audio embedded in them, they were lagging again.
Can audio be the issue for lag here ? Or anything else you experts will like to suggest.
Please help guys. Yours inputs will be very valuable for me.
You can use - (void)replaceCurrentItemWithPlayerItem:(AVPlayerItem *)item of AVPlayer.
This methods helps you to load the new item to an existing AVPlayer.
Here is the important reference for playing multiple videos using single AVPlayer.