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Médias (91)
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Spitfire Parade - Crisis
15 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Wired NextMusic
14 mai 2011, par
Mis à jour : Février 2012
Langue : English
Type : Video
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
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Sintel MP4 Surround 5.1 Full
13 mai 2011, par
Mis à jour : Février 2012
Langue : English
Type : Video
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Carte de Schillerkiez
13 mai 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (93)
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On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
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Sur d’autres sites (8773)
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failed to read iv from the auxiliary info
9 décembre 2017, par diSPassing encryption key and kid to mp4 muxer to encrypt the dash segments. With
ffmpeg
command generating dash single file for playback. But when I play using ffplay I seefailed to read the IV from auxiliary info
ffmpeg -y -f mp4 -i SampleVideo_1280x720_20mb.mp4 -map 0:v:0 -c copy -f dash -encryption_scheme cenc-aes-ctr -encryption_key <key> -encryption_kid <kid> -min_seg_duration 4000000 -use_timeline 1 -use_template 1 -single_file 1 ./enc.mpd
ffplay enc-stream0.m4s -decryption_key <key>
</key></kid></key>I get the error
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fa3040008c0] failed to read iv from the
auxiliary infoOn side note : don not see playback error when single file generated using mp4 muxer alone. Any inputs ? thanks...
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avformat/http: add "Opening" info logging to ff_http_do_new_request
13 décembre 2017, par Aman Gupta -
use AVMutableVideoComposition rotate video after ffmpge can't get rotate info
29 janvier 2018, par ladengbefore the video is not rotated, I can use FFmpeg command get rotate information, command like this :
ffprobe -v quiet -print_format json -show_format -show_streams recordVideo.mp4
or
ffmpeg -i recordVideo.mp4.
when I use AVMutableVideoComposition rotate video, the video lost video rotate information, rotate video simple : RoatetVideoSimpleCode,
code below :-(void)performWithAsset:(AVAsset*)asset complateBlock:(void(^)(void))complateBlock{
AVMutableComposition *mutableComposition;
AVMutableVideoComposition *mutableVideoComposition;
cacheRotateVideoURL = [[NSURL alloc] initFileURLWithPath:[NSString pathWithComponents:@[NSTemporaryDirectory(), kCacheCertVideoRotate]]];
AVMutableVideoCompositionInstruction *instruction = nil;
AVMutableVideoCompositionLayerInstruction *layerInstruction = nil;
CGAffineTransform t1;
CGAffineTransform t2;
AVAssetTrack *assetVideoTrack = nil;
AVAssetTrack *assetAudioTrack = nil;
// Check if the asset contains video and audio tracks
if ([[asset tracksWithMediaType:AVMediaTypeVideo] count] != 0) {
assetVideoTrack = [asset tracksWithMediaType:AVMediaTypeVideo][0];
}
if ([[asset tracksWithMediaType:AVMediaTypeAudio] count] != 0) {
assetAudioTrack = [asset tracksWithMediaType:AVMediaTypeAudio][0];
}
CMTime insertionPoint = kCMTimeZero;
NSError *error = nil;
// CGAffineTransform rotateTranslate;
// Step 1
// Create a composition with the given asset and insert audio and video tracks into it from the asset
if (!mutableComposition) {
// Check whether a composition has already been created, i.e, some other tool has already been applied
// Create a new composition
mutableComposition = [AVMutableComposition composition];
// Insert the video and audio tracks from AVAsset
if (assetVideoTrack != nil) {
AVMutableCompositionTrack *compositionVideoTrack = [mutableComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, [asset duration]) ofTrack:assetVideoTrack atTime:insertionPoint error:&error];
}
if (assetAudioTrack != nil) {
AVMutableCompositionTrack *compositionAudioTrack = [mutableComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
[compositionAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, [asset duration]) ofTrack:assetAudioTrack atTime:insertionPoint error:&error];
}
}
// Step 2
// Translate the composition to compensate the movement caused by rotation (since rotation would cause it to move out of frame)
// t1 = CGAffineTransformMakeTranslation(assetVideoTrack.naturalSize.height, 0.0);
// Rotate transformation
// t2 = CGAffineTransformRotate(t1, degreesToRadians(90.0));
CGFloat degrees = 90;
//--
if (degrees != 0) {
// CGAffineTransform mixedTransform;
if(degrees == 90){
//90°
t1 = CGAffineTransformMakeTranslation(assetVideoTrack.naturalSize.height,0.0);
t2 = CGAffineTransformRotate(t1,M_PI_2);
}else if(degrees == 180){
//180°
t1 = CGAffineTransformMakeTranslation(assetVideoTrack.naturalSize.width, assetVideoTrack.naturalSize.height);
t2 = CGAffineTransformRotate(t1,M_PI);
}else if(degrees == 270){
//270°
t1 = CGAffineTransformMakeTranslation(0.0, assetVideoTrack.naturalSize.width);
t2 = CGAffineTransformRotate(t1,M_PI_2*3.0);
}
}
// Step 3
// Set the appropriate render sizes and rotational transforms
if (!mutableVideoComposition) {
// Create a new video composition
mutableVideoComposition = [AVMutableVideoComposition videoComposition];
mutableVideoComposition.renderSize = CGSizeMake(assetVideoTrack.naturalSize.height,assetVideoTrack.naturalSize.width);
mutableVideoComposition.frameDuration = CMTimeMake(1, 30);
// The rotate transform is set on a layer instruction
instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
instruction.timeRange = CMTimeRangeMake(kCMTimeZero, [mutableComposition duration]);
layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:(mutableComposition.tracks)[0]];
[layerInstruction setTransform:t2 atTime:kCMTimeZero];
// [layerInstruction setTransform:rotateTranslate atTime:kCMTimeZero];
} else {
mutableVideoComposition.renderSize = CGSizeMake(mutableVideoComposition.renderSize.height, mutableVideoComposition.renderSize.width);
// Extract the existing layer instruction on the mutableVideoComposition
instruction = (mutableVideoComposition.instructions)[0];
layerInstruction = (instruction.layerInstructions)[0];
// Check if a transform already exists on this layer instruction, this is done to add the current transform on top of previous edits
CGAffineTransform existingTransform;
if (![layerInstruction getTransformRampForTime:[mutableComposition duration] startTransform:&existingTransform endTransform:NULL timeRange:NULL]) {
[layerInstruction setTransform:t2 atTime:kCMTimeZero];
} else {
// Note: the point of origin for rotation is the upper left corner of the composition, t3 is to compensate for origin
CGAffineTransform t3 = CGAffineTransformMakeTranslation(-1*assetVideoTrack.naturalSize.height/2, 0.0);
CGAffineTransform newTransform = CGAffineTransformConcat(existingTransform, CGAffineTransformConcat(t2, t3));
[layerInstruction setTransform:newTransform atTime:kCMTimeZero];
}
}
// Step 4
// Add the transform instructions to the video composition
instruction.layerInstructions = @[layerInstruction];
mutableVideoComposition.instructions = @[instruction];
//write video
if ([[NSFileManager defaultManager] fileExistsAtPath:cacheRotateVideoURL.path]) {
NSError *error = nil;
BOOL removeFlag = [[NSFileManager defaultManager] removeItemAtURL:cacheRotateVideoURL error:&error];
SPLog(@"remove rotate file:%@ %@",cacheRotateVideoURL.path,removeFlag?@"Success":@"Failed");
}
AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetMediumQuality] ;
exportSession.outputURL = cacheRotateVideoURL;
exportSession.outputFileType = AVFileTypeMPEG4;
exportSession.videoComposition = mutableVideoComposition;
exportSession.shouldOptimizeForNetworkUse = YES;
exportSession.timeRange = CMTimeRangeMake(kCMTimeZero, asset.duration);
[exportSession exportAsynchronouslyWithCompletionHandler:^{
SPLog(@"cache write done");
AVAsset* asset = [AVURLAsset URLAssetWithURL: cacheRotateVideoURL options:nil];
SPLog(@"rotate recrod video time: %lf",CMTimeGetSeconds(asset.duration));
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:cacheRotateVideoURL
completionBlock:^(NSURL *assetURL, NSError *error) {
if (error) {
NSLog(@"Save video fail:%@",error);
} else {
NSLog(@"Save video succeed.");
}
}];
complateBlock();
}];}
can anyone tell me why this is so?
how can I write rotate information when I rotate the video ?