how to get thumbnail of video url ios - objective-c

Question

i have tried below code. As result its gets image some time, not in every call of this method.
is there any solution.
-(UIImage *)thumbnailFromVideoAtURL:(NSString *)urlstr
{
NSURL *url = [NSURL URLWithString:urlstr];
AVAsset *asset = [AVAsset assetWithURL:url];
// Get thumbnail at the very start of the video
CMTime thumbnailTime = [asset duration];
thumbnailTime.value = 0;
// Get image from the video at the given time
AVAssetImageGenerator *imageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
CGImageRef imageRef = [imageGenerator copyCGImageAtTime:thumbnailTime actualTime:NULL error:NULL];
UIImage *thumbnail = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
return thumbnail;
}

Answer 1

CustomMoviePlayerVC.h
#interface CustomMoviePlayerVC : UIViewController {
#public
MPMoviePlayerController *mp;
NSURL *movieURL;
}
#property (weak, nonatomic) UIView *playBtn;
- (id)initWithPath:(NSString *)moviePath tag:(int)tag;
- (void)startPlayer;
- (void)pausePlayer;
- (void)stopPlayer;
- (BOOL)isFullScreen;
- (UIImage *)getVideoThumbnail;
- (MPMoviePlaybackState)getVideoPlaybackState;
- (MPMovieLoadState)getVideoLoadState;
- (void)enterFullScreenAnimated:(BOOL)animated;
- (void)exitFullScreenAnimated:(BOOL)animated;
- (void)prepare;
#end
CustomMoviePlayerVC.m
#import "CustomMoviePlayerVC.h"
#interface CustomMoviePlayerVC ()
#end
#implementation CustomMoviePlayerVC
- (BOOL)isFullScreen
{
return mp.isFullscreen;
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (id)initWithPath:(NSString *)moviePath tag:(int)tag
{
// Initialize and create movie URL
if (self = [super init]) {
movieURL = [NSURL URLWithString:moviePath];
mp = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
// Set movie player layout
if(tag == 1) {
[mp setControlStyle:MPMovieControlStyleNone];
}
[mp setShouldAutoplay:NO];
[mp setFullscreen:NO];
// May help to reduce latency
[mp prepareToPlay];
// Register that the load state changed (movie is ready)
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlayerLoadStateChanged:)
name:MPMoviePlayerLoadStateDidChangeNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector: #selector(MoviePlayerThumbnailImageRequestDidFinish:)
name: MPMoviePlayerThumbnailImageRequestDidFinishNotification
object: nil];
// registering for playback state change notification
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlaybackStateDidChange:)
name:MPMoviePlayerPlaybackStateDidChangeNotification
object:nil];
// registering for playback finish notification
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlaybackDidFinish:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
// registering for playback finish notification
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlaybackWillEnterFullscreen:)
name:MPMoviePlayerWillEnterFullscreenNotification
object:nil];
// registering for playback finish notification
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(moviePlaybackDidExitFullscreen:)
name:MPMoviePlayerDidExitFullscreenNotification
object:nil];
}
return self;
}
- (void)MoviePlayerThumbnailImageRequestDidFinish:(NSNotification*)not
{
}
- (void)enterFullScreenAnimated:(BOOL)animated
{
[mp setFullscreen:YES animated:animated];
}
- (void)exitFullScreenAnimated:(BOOL)animated
{
[mp setFullscreen:NO animated:animated];
}
- (void)moviePlayerLoadStateChanged:(NSNotification *)notification
{
[mp setControlStyle:MPMovieControlStyleEmbedded];
// Unless state is unknown, start playback
if ([mp loadState] != MPMovieLoadStateUnknown) {
// Set frame of movie player
[[mp view] setFrame:self.view.frame];
// Add movie player as subview
[[self view] addSubview:[mp view]];
}
}
- (void)moviePlaybackDidFinish:(NSNotification *)notification
{
[self exitFullScreenAnimated:YES];
if (mp.currentPlaybackTime <= 0.1) {
dispatch_async(dispatch_get_main_queue(), ^{
[mp stop];
[mp play];
[mp pause];
});
}
}
- (void)moviePlaybackStateDidChange:(NSNotification *)notification
{
switch ([self getVideoPlaybackState]) {
case MPMoviePlaybackStatePlaying:
[self.playBtn setHidden:YES];
[self.playBtn setUserInteractionEnabled:NO];
break;
case MPMoviePlaybackStatePaused:
[self.playBtn setHidden:NO];
[self.playBtn setUserInteractionEnabled:YES];
break;
case MPMoviePlaybackStateStopped:
[self.playBtn setHidden:NO];
[self.playBtn setUserInteractionEnabled:YES];
break;
default:
break;
}
}
- (void)moviePlaybackWillEnterFullscreen:(NSNotification *)notification
{
}
- (void)moviePlaybackDidExitFullscreen:(NSNotification *)notification
{
}
- (void)startPlayer
{
[self.playBtn setHidden:YES];
[self.playBtn setUserInteractionEnabled:NO];
if (mp.loadState != MPMovieLoadStateUnknown) {
[mp play];
}
}
- (void)pausePlayer
{
[self.playBtn setHidden:NO];
[self.playBtn setUserInteractionEnabled:YES];
if (mp.loadState != MPMovieLoadStateUnknown) {
[mp pause];
}
}
- (void)stopPlayer
{
[self.playBtn setHidden:NO];
[self.playBtn setUserInteractionEnabled:YES];
if (mp.loadState != MPMovieLoadStateUnknown) {
[mp stop];
}
}
- (UIImage *)getVideoThumbnail
{
if (mp && mp.loadState != MPMovieLoadStateUnknown) {
return [mp thumbnailImageAtTime:0.3 timeOption:MPMovieTimeOptionExact];
}
return nil;
}
- (MPMoviePlaybackState)getVideoPlaybackState
{
return mp.playbackState;
}
- (MPMovieLoadState)getVideoLoadState
{
return mp.loadState;
}
- (void)prepare
{
[mp prepareToPlay];
}
#end
Use getVideoThumbnail to get image from video.