11
में कैप्चर किए गए वीडियो घुमाए गए वीडियो मैंने वीडियो पर छवि ओवरले जोड़ने के लिए कोड का उपयोग किया है और फिर दस्तावेज़ जेनरेट करने के लिए नए जेनरेट किए गए वीडियो को निर्यात किया है। लेकिन आश्चर्यजनक रूप से, वीडियो 90 डिग्री से घूर्णन हो जाता है।AVMutableVideoComposition पोर्ट्रेट मोड
- (void)buildTransitionComposition:(AVMutableComposition *)composition andVideoComposition:(AVMutableVideoComposition *)videoComposition
{
CMTime nextClipStartTime = kCMTimeZero;
NSInteger i;
// Make transitionDuration no greater than half the shortest clip duration.
CMTime transitionDuration = self.transitionDuration;
for (i = 0; i < [_clips count]; i++) {
NSValue *clipTimeRange = [_clipTimeRanges objectAtIndex:i];
if (clipTimeRange) {
CMTime halfClipDuration = [clipTimeRange CMTimeRangeValue].duration;
halfClipDuration.timescale *= 2; // You can halve a rational by doubling its denominator.
transitionDuration = CMTimeMinimum(transitionDuration, halfClipDuration);
}
}
// Add two video tracks and two audio tracks.
AVMutableCompositionTrack *compositionVideoTracks[2];
AVMutableCompositionTrack *compositionAudioTracks[2];
compositionVideoTracks[0] = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
compositionVideoTracks[1] = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
compositionAudioTracks[0] = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
compositionAudioTracks[1] = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
CMTimeRange *passThroughTimeRanges = alloca(sizeof(CMTimeRange) * [_clips count]);
CMTimeRange *transitionTimeRanges = alloca(sizeof(CMTimeRange) * [_clips count]);
// Place clips into alternating video & audio tracks in composition, overlapped by transitionDuration.
for (i = 0; i < [_clips count]; i++) {
NSInteger alternatingIndex = i % 2; // alternating targets: 0, 1, 0, 1, ...
AVURLAsset *asset = [_clips objectAtIndex:i];
NSValue *clipTimeRange = [_clipTimeRanges objectAtIndex:i];
CMTimeRange timeRangeInAsset;
if (clipTimeRange)
timeRangeInAsset = [clipTimeRange CMTimeRangeValue];
else
timeRangeInAsset = CMTimeRangeMake(kCMTimeZero, [asset duration]);
AVAssetTrack *clipVideoTrack = [[asset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
[compositionVideoTracks[alternatingIndex] insertTimeRange:timeRangeInAsset ofTrack:clipVideoTrack atTime:nextClipStartTime error:nil];
/*
CGAffineTransform t = clipVideoTrack.preferredTransform;
NSLog(@"Transform1 : %@",t);
*/
AVAssetTrack *clipAudioTrack = [[asset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0];
[compositionAudioTracks[alternatingIndex] insertTimeRange:timeRangeInAsset ofTrack:clipAudioTrack atTime:nextClipStartTime error:nil];
// Remember the time range in which this clip should pass through.
// Every clip after the first begins with a transition.
// Every clip before the last ends with a transition.
// Exclude those transitions from the pass through time ranges.
passThroughTimeRanges[i] = CMTimeRangeMake(nextClipStartTime, timeRangeInAsset.duration);
if (i > 0) {
passThroughTimeRanges[i].start = CMTimeAdd(passThroughTimeRanges[i].start, transitionDuration);
passThroughTimeRanges[i].duration = CMTimeSubtract(passThroughTimeRanges[i].duration, transitionDuration);
}
if (i+1 < [_clips count]) {
passThroughTimeRanges[i].duration = CMTimeSubtract(passThroughTimeRanges[i].duration, transitionDuration);
}
// The end of this clip will overlap the start of the next by transitionDuration.
// (Note: this arithmetic falls apart if timeRangeInAsset.duration < 2 * transitionDuration.)
nextClipStartTime = CMTimeAdd(nextClipStartTime, timeRangeInAsset.duration);
nextClipStartTime = CMTimeSubtract(nextClipStartTime, transitionDuration);
// Remember the time range for the transition to the next item.
transitionTimeRanges[i] = CMTimeRangeMake(nextClipStartTime, transitionDuration);
}
// Set up the video composition if we are to perform crossfade or push transitions between clips.
NSMutableArray *instructions = [NSMutableArray array];
// Cycle between "pass through A", "transition from A to B", "pass through B", "transition from B to A".
for (i = 0; i < [_clips count]; i++) {
NSInteger alternatingIndex = i % 2; // alternating targets
// Pass through clip i.
AVMutableVideoCompositionInstruction *passThroughInstruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
passThroughInstruction.timeRange = passThroughTimeRanges[i];
AVMutableVideoCompositionLayerInstruction *passThroughLayer = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:compositionVideoTracks[alternatingIndex]];
/*
CGAffineTransform rotationTransform = CGAffineTransformMakeRotation(M_PI_2);
CGAffineTransform rotateTranslate = CGAffineTransformTranslate(rotationTransform,320,0);
[passThroughLayer setTransform:rotateTranslate atTime:kCMTimeZero];
*/
passThroughInstruction.layerInstructions = [NSArray arrayWithObject:passThroughLayer];
[instructions addObject:passThroughInstruction];
if (i+1 < [_clips count]) {
// Add transition from clip i to clip i+1.
AVMutableVideoCompositionInstruction *transitionInstruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
transitionInstruction.timeRange = transitionTimeRanges[i];
AVMutableVideoCompositionLayerInstruction *fromLayer = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:compositionVideoTracks[alternatingIndex]];
AVMutableVideoCompositionLayerInstruction *toLayer = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:compositionVideoTracks[1-alternatingIndex]];
if (self.transitionType == SimpleEditorTransitionTypeCrossFade) {
// Fade out the fromLayer by setting a ramp from 1.0 to 0.0.
[fromLayer setOpacityRampFromStartOpacity:1.0 toEndOpacity:0.0 timeRange:transitionTimeRanges[i]];
}
else if (self.transitionType == SimpleEditorTransitionTypePush) {
// Set a transform ramp on fromLayer from identity to all the way left of the screen.
[fromLayer setTransformRampFromStartTransform:CGAffineTransformIdentity toEndTransform:CGAffineTransformMakeTranslation(-composition.naturalSize.width, 0.0) timeRange:transitionTimeRanges[i]];
// Set a transform ramp on toLayer from all the way right of the screen to identity.
[toLayer setTransformRampFromStartTransform:CGAffineTransformMakeTranslation(+composition.naturalSize.width, 0.0) toEndTransform:CGAffineTransformIdentity timeRange:transitionTimeRanges[i]];
}
transitionInstruction.layerInstructions = [NSArray arrayWithObjects:fromLayer, toLayer, nil];
[instructions addObject:transitionInstruction];
}
}
videoComposition.instructions = instructions;
}
कृपया मदद करें, क्योंकि मैं उचित मोड में पोर्ट्रेट वीडियो निर्यात करने में सक्षम नहीं हूं। किसी भी मदद की सराहना की। धन्यवाद।
मैंने कोशिश की इस पद्धति है, लेकिन execution.Can के दौरान अपनी नहीं बुलाया जा रहा है आप विस्तृत कृपया इसका उपयोग थोड़ा सा है। धन्यवाद। :) – Dhruv
यह मेरा वीडियो पूरी तरह से काला बारी। क्या आप कृपया मेरी मदद कर सकते हैं क्यों? – itsji10dra
यह अच्छा होगा अगर आप इसके लिए स्विफ्ट 3 कोड दे सकें। –