我或多或少使用这里的代码:AVPlayer Video SeekToTime
但是,当我尝试滚动时,似乎锁定到了某些时间点(基本上是每帧位于第二个时间标记上),因此当我通过滑动器进行擦洗时,会不断在手指所在的位置和最后一秒钟之间来回射击。通过,并且视频仅在第二秒标记处更改。

现在,我做了一个“大”更改,因为我们想要平滑滚动,是在任何存在“seekToTime”的地方,我都将其替换为seekToTime:toleranceBefore:kCMTimeZeroleranceAfter:kCMTimeZero。

如果您需要更多信息,请告诉我!提前致谢!

最佳答案

请参阅以下代码:此代码是Apple示例代码的一部分

AVPlayerDemo

如果您尝试实现流播放器,请引用下面的示例代码。

StitchedStreamPlayer

另外,要完全擦洗的完整工具是使用下面的类似滑块。
因为出色的Video Player应该考虑使用UX。如您所知,运行默认的Video App。进行擦洗时,如果向下拖动滑块,则必须进行微调。

CPSlider
| OBSlider

/* The user is dragging the movie controller thumb to scrub through the movie. */
- (IBAction)beginScrubbing:(id)sender
{
    mRestoreAfterScrubbingRate = [mPlayer rate];
    [mPlayer setRate:0.f];

    /* Remove previous timer. */
    [self removePlayerTimeObserver];
}

/* Set the player current time to match the scrubber position. */
- (IBAction)scrub:(id)sender
{
    if ([sender isKindOfClass:[UISlider class]])
    {
        UISlider* slider = sender;

        CMTime playerDuration = [self playerItemDuration];
        if (CMTIME_IS_INVALID(playerDuration)) {
            return;
        }

        double duration = CMTimeGetSeconds(playerDuration);
        if (isfinite(duration))
        {
            float minValue = [slider minimumValue];
            float maxValue = [slider maximumValue];
            float value = [slider value];

            double time = duration * (value - minValue) / (maxValue - minValue);

            [mPlayer seekToTime:CMTimeMakeWithSeconds(time, NSEC_PER_SEC)];
        }
    }
}

/* The user has released the movie thumb control to stop scrubbing through the movie. */
- (IBAction)endScrubbing:(id)sender
{
    if (!mTimeObserver)
    {
        CMTime playerDuration = [self playerItemDuration];
        if (CMTIME_IS_INVALID(playerDuration))
        {
            return;
        }

        double duration = CMTimeGetSeconds(playerDuration);
        if (isfinite(duration))
        {
            CGFloat width = CGRectGetWidth([mScrubber bounds]);
            double tolerance = 0.5f * duration / width;

            mTimeObserver = [[mPlayer addPeriodicTimeObserverForInterval:CMTimeMakeWithSeconds(tolerance, NSEC_PER_SEC) queue:NULL usingBlock:
            ^(CMTime time)
            {
                [self syncScrubber];
            }] retain];
        }
    }

    if (mRestoreAfterScrubbingRate)
    {
        [mPlayer setRate:mRestoreAfterScrubbingRate];
        mRestoreAfterScrubbingRate = 0.f;
    }
}

关于iphone - iOS AVPlayer seektotime锁定在某些点,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/7663994/

10-09 21:05