I'm making an app that uses AVPlayer. In one of my views I have a UISlider with which the user should be able to scrub forward and backward. I'm having some trouble getting seekToTime to work as I want. When I try to change time the playback starts from 0, and I'm not sure how to solve this. My current implementation looks like this:
[self.progressSlider addTarget:self action:#selector(sliderValueChanged) forControlEvents:UIControlEventValueChanged];
[self.progressSlider addTarget:self action:#selector(sliderReleased) forControlEvents:UIControlEventTouchUpInside];
- (void)sliderValueChanged {
[...]
[player pause];
}
- (void)sliderReleased {
float timeInSecond = self.progressSlider.value;
timeInSecond *= 1000;
// I have trie to hard code this value, but I get the same result.
CMTime cmTime = CMTimeMake(timeInSecond, NSEC_PER_SEC);
[player.currentItem seekToTime:cmTime toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero completionHandler:^(BOOL finished) {
if (finished) {
[player play];
}
}];
}
Any ideas on what I'm doing wrong?
Can mention that I stream audio using AVPlayer's: playerItemWithURL if that makes any difference.
One problem is that NSEC_PER_SEC is 1,000,000,000, so CMTimeMake(timeInSecond, NSEC_PER_SEC) is going to be a really tiny number (unless timeInSecond is ridiculously huge) - in fact, it will be arbitrarily close to zero, which is exactly what you are experiencing.
Just to be clear: CMTimeMake defines a rational number. You are giving a numerator and a denominator. If your denominator is huge, the rational number will be tiny.
Related
I want to make part of video slow down while rest of it are normal speed, just like the slow mode video taken by iOS camera. How to do that? I've search AVFoundation but found nothing.
Thanks!
If you are only talking about creating this effect during playback (and not exporting it), you should be able to do so by just changing the rate property of AVPlayer at specific times. Use addBoundaryTimeObserverForTimes:queue:usingBlock: to get notified when it's time to change the rate.
CMTime interval = CMTimeMake(10, 1);
NSArray *times = #[[NSValue valueWithCMTime:interval]];
_boundaryTimeObserver = [_avPlayer addBoundaryTimeObserverForTimes:times
queue:nil
usingBlock:^{
[_weakPlayer setRate:0.5];
}];
The rate property works as follows:
rate = 0.0; // Stopped
rate = 0.5; // Half speed
rate = 1.0; // Normal speed
For slow motion playback, the AVPlayer property canPlaySlowForward must be set to true.
Remember to remove the time observer when you're finished with it, and make sure to use an unretained reference to self or to the player within the block in order to avoid retain cycles.
I am working on video app and playing video on AVPlayer. But problem is when I seek the video to particular time with the help of UISlider. The player seekToTime method get time value in integer but I want that it gets in float. Please help
Here is my code
Float32 sliderValue = (float) avPlayerSlider.value;
[mPlayer seekToTime:CMTimeMake(sliderValue, 1) toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];
You can set proper time scale.
CMTimeMake(12345, 10000); //This is 1.2345 seconds
Or use defined time scales
#define NSEC_PER_USEC 1000ull /* nanoseconds per microsecond */
#define USEC_PER_SEC 1000000ull /* microseconds per second */
#define NSEC_PER_SEC 1000000000ull /* nanoseconds per second */
#define NSEC_PER_MSEC 1000000ull /* nanoseconds per millisecond */
In my player app, I'm using such conversations:
CMTime thumbTime = CMTimeMakeWithSeconds(self.currentPlaybackTime, NSEC_PER_SEC);
I have also been plagued by this problem, fix it and the code below:
[_playerItem cancelPendingSeeks];
[_player seekToTime:CMTimeMakeWithSeconds(leftPosition, NSEC_PER_SEC) toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];
leftPosition(CGFloat) is the time of the asset, the unit is a second.
I hope can help to you
in my app i want to add feature . swipe on video take the video to next 2 sec from current playback time. but my player not doing this accurate and exact according to time which i pass to function it jump the current play back time at any where else. i already search a lot and found may be this is due to key-frame of my video i think i need to increase key-frame of video if yes
then (1) what is the best way to increase key-frame of video?
if this issue can solve without increasing key-frame then
(2) how can i do this ?
here is my code
-(void) handleOneFingerSwipeRight
{
if(labelTimer.isValid)
[labelTimer invalidate];
[NSObject cancelPreviousPerformRequestsWithTarget:self selector:#selector(signleTap) object:nil];
[videoPlayer pause];
double d = 0;
d = floor([videoPlayer currentPlaybackTime]);
d = d+2.0;
NSLog(#"current time %f",floor([videoPlayer currentPlaybackTime]));
NSLog(#"new time %f",d);
[videoPlayer setCurrentPlaybackTime:d];
[videoPlayer play];
[self setLable:[NSString stringWithFormat:#"Adaptive Forward %f",d]];
}
I use use AVPlayer to implement a custom player.
Some video playerItem provide the current time and wrong duration. After to seek time use slide to seek time many times. Call the API
When I seek to zero, some video can not be precisely seeked.
[self.player seekToTime:CMTimeMakeWithSeconds(time, NSEC_PER_SEC)
toleranceBefore:CMTimeMake(1, 1)
toleranceAfter:CMTimeMake(1, 1)
completionHandler:^(BOOL finished) {
if (finished) {
IVCLogV(#"seek finish!");
}
else
{
IVCLogV(#"seek interrupted");
}
if (completionHandle) {
completionHandle(finished);
}
}];
I change the codes according the mediaTime.timeScale. Now I discover the video stream have changed the video duration and current time after several play.
Make sure that the Timescale of the media being played matches with your timescale. I can see you have used NSEC_PER_SEC as timescale. You may have to scale your CMTime input to seelTo method.
CMTime timeAccordingToMediaTimescale = CMTimeConvertScale(time, mediaTime.timescale, CMTimeRoundingMethod);
I am using AVPlayer, and its working good.
I put slider and it is progression according to player duration.
But i want if user drags slider then play time changes accordingly. i.e. Song forwards or backwards according to slider position.
I have tried
-(IBAction)sliderChange:(id)sender{
[player pause];
CMTime t = CMTimeMake(slider.value,1);
[player seekToTime:t];
[player play];
}
But it again takes slider to starting point. Any help would be much appreciated.
EDIT (WORKING WITH BELOW LINK)
AVPlayer Video SeekToTime
-(IBAction) valueChangeSliderTimer:(id)sender{
[avplayer pause];
isPlaying = FALSE;
[btnPauseAndPlay setTitle:#"Play" forState:UIControlStateNormal];
float timeInSecond = sliderTimer.value;
timeInSecond *= 1000;
CMTime cmTime = CMTimeMake(timeInSecond, 1000);
[avplayer seekToTime:cmTime toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];
}
Edited Code .
And try this link as well :
Try this link