是否可以配置MPMoviePlayerController来显示字幕？我试着查看文档，但找不到与之相关的任何内容。感谢
答案 0 :(得分：2)
字幕/隐藏式字幕可以使用各种应用程序（如QuickTime Pro或Handbrake）直接烘焙到媒体文件中。然后需要在设置＆gt;＆gt;视频中打开隐藏式字幕，以便MPMoviePlayerController为CC烘焙的媒体文件启用CC。
答案 1 :(得分：2)
我知道这是迟到的答案，但有效答案。查看this MPMoviePlayerController-Subtitles链接。我正在更新这个以帮助未来的其他人。
<强>的MPMoviePlayerController + Subtitles.h
//
// MPMoviePlayerController+Subtitles.h
// MPMoviePlayerControllerSubtitles
//
// Created by mhergon on 03/12/13.
// Copyright (c) 2013 mhergon. All rights reserved.
//
#import <MediaPlayer/MediaPlayer.h>
@interface MPMoviePlayerController (Subtitles)
#pragma mark - Methods
- (void)openSRTFileAtPath:(NSString *)localFile completion:(void (^)(BOOL finished))success failure:(void (^)(NSError *error))failure;
- (void)showSubtitles;
- (void)hideSubtitles;
@end
<强>的MPMoviePlayerController + Subtitles.m
//
// MPMoviePlayerController+Subtitles.m
// MPMoviePlayerControllerSubtitles
//
// Created by mhergon on 03/12/13.
// Copyright (c) 2013 mhergon. All rights reserved.
//
#import "MPMoviePlayerController+Subtitles.h"
#import <objc/runtime.h>
static NSString *const kIndex = @"kIndex";
static NSString *const kStart = @"kStart";
static NSString *const kEnd = @"kEnd";
static NSString *const kText = @"kText";
@interface MPMoviePlayerViewController ()
#pragma mark - Properties
@property (strong, nonatomic) NSMutableDictionary *subtitlesParts;
@property (strong, nonatomic) NSTimer *subtitleTimer;
@property (strong, nonatomic) UILabel *subtitleLabel;
#pragma mark - Private methods
- (void)showSubtitles:(BOOL)show;
- (void)parseString:(NSString *)string parsed:(void (^)(BOOL parsed, NSError *error))completion;
- (NSTimeInterval)timeFromString:(NSString *)yimeString;
- (void)searchAndShowSubtitle;
#pragma mark - Notifications
- (void)playbackStateDidChange:(NSNotification *)notification;
- (void)orientationWillChange:(NSNotification *)notification;
- (void)orientationDidChange:(NSNotification *)notification;
@end
@implementation MPMoviePlayerController (Subtitles)
#pragma mark - Methods
- (void)openSRTFileAtPath:(NSString *)localFile completion:(void (^)(BOOL finished))success failure:(void (^)(NSError *error))failure {
// Error
NSError *error = nil;
// File to string
NSString *subtitleString = [NSString stringWithContentsOfFile:localFile
encoding:NSUTF8StringEncoding
error:&error];
if (error && failure != NULL) {
failure(error);
return;
}
// Parse and show text
[self parseString:subtitleString
parsed:^(BOOL parsed, NSError *error) {
if (!error && success != NULL) {
// Register for notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(playbackStateDidChange:)
name:MPMoviePlayerPlaybackStateDidChangeNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(orientationWillChange:)
name:UIApplicationWillChangeStatusBarFrameNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(orientationDidChange:)
name:UIDeviceOrientationDidChangeNotification
object:nil];
success(YES);
} else if (error && failure != NULL) {
failure(error);
}
}];
}
- (void)showSubtitles:(BOOL)show {
// Hide label
self.subtitleLabel.hidden = !show;
}
- (void)showSubtitles {
[self showSubtitles:YES];
}
- (void)hideSubtitles {
[self showSubtitles:NO];
}
#pragma mark - Private methods
- (void)parseString:(NSString *)string parsed:(void (^)(BOOL parsed, NSError *error))completion {
// Create Scanner
NSScanner *scanner = [NSScanner scannerWithString:string];
// Subtitles parts
self.subtitlesParts = [NSMutableDictionary dictionary];
// Search for members
while (!scanner.isAtEnd) {
// Variables
NSString *indexString;
[scanner scanUpToCharactersFromSet:[NSCharacterSet newlineCharacterSet]
intoString:&indexString];
NSString *startString;
[scanner scanUpToString:@" --> " intoString:&startString];
[scanner scanString:@"-->" intoString:NULL];
NSString *endString;
[scanner scanUpToCharactersFromSet:[NSCharacterSet newlineCharacterSet]
intoString:&endString];
NSString *textString;
[scanner scanUpToString:@"\r\n\r\n" intoString:&textString];
textString = [textString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
// Regular expression to replace tags
NSError *error = nil;
NSRegularExpression *regExp = [NSRegularExpression regularExpressionWithPattern:@"[<|\\{][^>|\\^}]*[>|\\}]"
options:NSRegularExpressionCaseInsensitive
error:&error];
if (error) {
completion(NO, error);
return;
}
textString = [regExp stringByReplacingMatchesInString:textString
options:0
range:NSMakeRange(0, textString.length)
withTemplate:@""];
// Temp object
NSTimeInterval startInterval = [self timeFromString:startString];
NSTimeInterval endInterval = [self timeFromString:endString];
NSDictionary *tempInterval = @{
kIndex : indexString,
kStart : @(startInterval),
kEnd : @(endInterval),
kText : textString ? textString : @""
};
[self.subtitlesParts setObject:tempInterval
forKey:indexString];
}
completion(YES, nil);
}
- (NSTimeInterval)timeFromString:(NSString *)timeString {
NSScanner *scanner = [NSScanner scannerWithString:timeString];
int h, m, s, c;
[scanner scanInt:&h];
[scanner scanString:@":" intoString:NULL];
[scanner scanInt:&m];
[scanner scanString:@":" intoString:NULL];
[scanner scanInt:&s];
[scanner scanString:@"," intoString:NULL];
[scanner scanInt:&c];
return (h * 3600) + (m * 60) + s + (c / 1000.0);
}
- (void)searchAndShowSubtitle {
// Search for timeInterval
NSPredicate *initialPredicate = [NSPredicate predicateWithFormat:@"(%@ >= %K) AND (%@ <= %K)", @(self.currentPlaybackTime), kStart, @(self.currentPlaybackTime), kEnd];
NSArray *objectsFound = [[self.subtitlesParts allValues] filteredArrayUsingPredicate:initialPredicate];
NSDictionary *lastFounded = (NSDictionary *)[objectsFound lastObject];
// Show text
if (lastFounded) {
// Get text
self.subtitleLabel.text = [lastFounded objectForKey:kText];
// Label position
CGSize size = [self.subtitleLabel.text sizeWithFont:self.subtitleLabel.font
constrainedToSize:CGSizeMake(CGRectGetWidth(self.subtitleLabel.bounds), CGFLOAT_MAX)];
self.subtitleLabel.frame = ({
CGRect frame = self.subtitleLabel.frame;
frame.size.height = size.height;
frame;
});
self.subtitleLabel.center = CGPointMake(CGRectGetWidth(self.view.bounds) / 2.0, CGRectGetHeight(self.view.bounds) - (CGRectGetHeight(self.subtitleLabel.bounds) / 2.0) - 15.0);
} else {
self.subtitleLabel.text = @"";
}
}
#pragma mark - Notifications
- (void)playbackStateDidChange:(NSNotification *)notification {
switch (self.playbackState) {
case MPMoviePlaybackStateStopped: {
// Stop
if (self.subtitleTimer.isValid) {
[self.subtitleTimer invalidate];
}
break;
}
case MPMoviePlaybackStatePlaying: {
// Start timer
self.subtitleTimer = [NSTimer scheduledTimerWithTimeInterval:1.0
target:self
selector:@selector(searchAndShowSubtitle)
userInfo:nil
repeats:YES];
[self.subtitleTimer fire];
// Add label
if (!self.subtitleLabel) {
// Add label
CGFloat fontSize = 0.0;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
fontSize = 40.0;
} else {
fontSize = 20.0;
}
self.subtitleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 0.0, CGRectGetWidth(self.view.bounds) - 30.0, 100.0)];
self.subtitleLabel.center = CGPointMake(CGRectGetWidth(self.view.bounds) / 2.0, CGRectGetHeight(self.view.bounds) - (CGRectGetHeight(self.subtitleLabel.bounds) / 2.0) - 15.0);
self.subtitleLabel.backgroundColor = [UIColor clearColor];
self.subtitleLabel.font = [UIFont boldSystemFontOfSize:fontSize];
self.subtitleLabel.textColor = [UIColor whiteColor];
self.subtitleLabel.numberOfLines = 0;
self.subtitleLabel.textAlignment = NSTextAlignmentCenter;
self.subtitleLabel.layer.shadowColor = [UIColor blackColor].CGColor;
self.subtitleLabel.layer.shadowOffset = CGSizeMake(6.0, 6.0);
self.subtitleLabel.layer.shadowOpacity = 0.9;
self.subtitleLabel.layer.shadowRadius = 4.0;
self.subtitleLabel.layer.shouldRasterize = YES;
self.subtitleLabel.layer.rasterizationScale = [[UIScreen mainScreen] scale];
[self.view addSubview:self.subtitleLabel];
}
break;
}
default: {
break;
}
}
}
- (void)orientationWillChange:(NSNotification *)notification {
// Hidden label
self.subtitleLabel.hidden = YES;
}
- (void)orientationDidChange:(NSNotification *)notification {
// Label position
CGSize size = [self.subtitleLabel.text sizeWithFont:self.subtitleLabel.font
constrainedToSize:CGSizeMake(CGRectGetWidth(self.subtitleLabel.bounds), CGFLOAT_MAX)];
self.subtitleLabel.frame = ({
CGRect frame = self.subtitleLabel.frame;
frame.size.height = size.height;
frame;
});
self.subtitleLabel.center = CGPointMake(CGRectGetWidth(self.view.bounds) / 2.0, CGRectGetHeight(self.view.bounds) - (CGRectGetHeight(self.subtitleLabel.bounds) / 2.0) - 15.0);
// Hidden label
self.subtitleLabel.hidden = NO;
}
#pragma mark - Others
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)setSubtitlesParts:(NSMutableDictionary *)subtitlesParts {
objc_setAssociatedObject(self, @"subtitlesParts", subtitlesParts, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSMutableDictionary *)subtitlesParts {
return objc_getAssociatedObject(self, @"subtitlesParts");
}
- (void)setSubtitleTimer:(NSTimer *)timer {
objc_setAssociatedObject(self, @"timer", timer, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSTimer *)subtitleTimer {
return objc_getAssociatedObject(self, @"timer");
}
- (void)setSubtitleLabel:(UILabel *)subtitleLabel {
objc_setAssociatedObject(self, @"subtitleLabel", subtitleLabel, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (UILabel *)subtitleLabel {
return objc_getAssociatedObject(self, @"subtitleLabel");
}
@end
导入上面的类并使用以下方法：
- (IBAction)showVideoAction:(UIButton *)sender {
// Video file
NSString *filePathStr = [[NSBundle mainBundle] pathForResource:@"example" ofType:@"mp4"];
NSURL *fileURL = [NSURL fileURLWithPath:filePathStr];
// Subtitles file
NSString *subtitlesPathStr = [[NSBundle mainBundle] pathForResource:@"example" ofType:@"srt"];
// Create MoviePlayer
MPMoviePlayerViewController *player = [[MPMoviePlayerViewController alloc] initWithContentURL:fileURL];
[player.moviePlayer openSRTFileAtPath:subtitlesPathStr
completion:^(BOOL finished) {
// Activate subtitles
[player.moviePlayer showSubtitles];
// Show video
[self presentMoviePlayerViewControllerAnimated:player];
} failure:^(NSError *error) {
NSLog(@"Error: %@", error.description);
}];
}
答案 2 :(得分：0)
我认为你不能将字幕移植到它上面，但是你可以使用UILabel并将其添加为子视图，也许只需要做一些工作，在特定时间将标签文本设置为特定文本并充当副标题。
答案 3 :(得分：0)
实际上，字幕有内置功能。您可以使用iSubtitle将软代码编码为视频文件。