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• 2D video to VR 360° "wall of TV's" ?

  1er septembre 2020, par ƬƦƖƝƛ

  What would be involved in creating a 360° "wall of TV's" style VR video from a bunch of 2d videos ? (surrounding the viewer)

  


  Is that complexity of rendering even possible using typical software (ffmpeg ?) on an average home computer ?

  


  
  
[okay, maybe not THAT complex !]

  


• Fastest Way to Compress Video Size Using Library or Algo

  3 août 2016, par Muhammd Hassan

  I’m trying to compress high quality video into less size and I’m able to reduce the size of video that I’ve compressed using the following objective-c code :

   - (BOOL)convertMovieToMP4:(NSString ) originalMovPath andStoragePath:(NSString ) compMovPath
  
          {
  
              NSURL *tmpSourceUrl = [NSURL fileURLWithPath:originalMovPath];
  
  
  
              compMovPath = [compMovPath stringByReplacingOccurrencesOfString:[compMovPath pathExtension] withString:@"mp4"];
  
              NSURL *tmpDestUrl = [NSURL fileURLWithPath:compMovPath];
  
  
  
              AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:tmpSourceUrl options:nil];
  
              AVMutableComposition* mixComposition = [AVMutableComposition composition];
  
  
  
              AVMutableCompositionTrack *compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo  preferredTrackID:kCMPersistentTrackID_Invalid];
  
  
  
              AVAssetTrack *clipVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
  
              [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
  
                                             ofTrack:clipVideoTrack
  
                                              atTime:kCMTimeZero error:nil];
  
  
  
              [compositionVideoTrack setPreferredTransform:[[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] preferredTransform]];
  
  
  
              CGSize videoSize = [[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] naturalSize];
  
  
  
              CATextLayer *titleLayer = [CATextLayer layer];
  
              titleLayer.string = @"Ojatro";
  
              titleLayer.font = (_bridge CFTypeRef Nullable)(@"Helvetica");
  
              titleLayer.fontSize = videoSize.height / 8;
  
              titleLayer.shadowOpacity = 0.2;
  
              titleLayer.alignmentMode = kCAAlignmentCenter;
  
              titleLayer.bounds = CGRectMake(0, 0, videoSize.width, videoSize.height / 6);
  
              titleLayer.position=CGPointMake(videoSize.width/2, videoSize.height/2);
  
  
  
              CALayer *parentLayer = [CALayer layer];
  
              CALayer *videoLayer = [CALayer layer];
  
              parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
  
              videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
  
              [parentLayer addSublayer:videoLayer];
  
              [parentLayer addSublayer:titleLayer];
  
  
  
              AVMutableVideoComposition* videoComp = [AVMutableVideoComposition videoComposition];
  
              videoComp.renderSize = videoSize;
  
              videoComp.frameDuration = CMTimeMake(1, 30);
  
              videoComp.animationTool = [AVVideoCompositionCoreAnimationTool      videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];
  
  
  
              AVMutableVideoCompositionInstruction *instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
  
              instruction.timeRange = CMTimeRangeMake(kCMTimeZero, [mixComposition duration]);
  
  
  
              AVAssetTrack *videoTrack = [[mixComposition tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
  
  
  
              AVMutableVideoCompositionLayerInstruction* layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:videoTrack];
  
  
  
              instruction.layerInstructions = [NSArray arrayWithObject:layerInstruction];
  
              videoComp.instructions = [NSArray arrayWithObject: instruction];
  
  
  
              AVAssetExportSession* _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetMediumQuality];//AVAssetExportPresetPasst
  
              _assetExport.videoComposition = videoComp;
  
              //NSString* videoName = @"mynewwatermarkedvideo.mov";
  
              NSString *tmpDirPath = [compMovPath stringByReplacingOccurrencesOfString:[compMovPath lastPathComponent] withString:@""];
  
              if ([Utility makeDirectoryAtPath:tmpDirPath])
  
              {
  
                  NSLog(@"Directory Created");
  
              }
  
              //exportPath=[exportPath stringByAppendingString:videoName];
  
              NSURL    *exportUrl = tmpDestUrl;
  
  
  
              if ([[NSFileManager defaultManager] fileExistsAtPath:compMovPath])
  
              {
  
                  [[NSFileManager defaultManager] removeItemAtPath:compMovPath error:nil];
  
              }
  
  
  
              _assetExport.outputURL = exportUrl;
  
              _assetExport.shouldOptimizeForNetworkUse = YES;
  
              _assetExport.outputFileType = AVFileTypeMPEG4;
  
  
  
              //[strRecordedFilename setString: exportPath];
  
  
  
              [_assetExport exportAsynchronouslyWithCompletionHandler:
  
               ^(void ) {
  
                   switch (_assetExport.status)
  
                   {
  
                       case AVAssetExportSessionStatusUnknown:
  
                           NSLog(@"Export Status Unknown");
  
  
  
                           break;
  
                       case AVAssetExportSessionStatusWaiting:
  
                           NSLog(@"Export Waiting");
  
  
  
                           break;
  
                       case AVAssetExportSessionStatusExporting:
  
                           NSLog(@"Export Status");
  
  
  
                           break;
  
                       case AVAssetExportSessionStatusCompleted:
  
                           NSLog(@"Export Completed");
  
                           totalFilesCopied++;
  
                           [self startProgressBar];
  
  
  
                           break;
  
                       case AVAssetExportSessionStatusFailed:
  
                           NSLog(@"Export failed");
  
  
  
                           break;
  
                       case AVAssetExportSessionStatusCancelled:
  
                           NSLog(@"Export canceled");
  
  
  
                           break;
  
                   }
  
               }
  
               ];
  
              return NO;
  
          }

  But my main problem is that when I compress the 500MB video (i.e average video) file and it takes approximately 20 to 30+ minutes. It reduce the video size to approximately 130MB. I’m using the Native AVFoundation Library to compress the video to reduce its size.

  I need to compress the video size very fast just like Apple Compressor application, it compresses the 500MB file within 30 seconds only...

  https://itunes.apple.com/en/app/compressor/id424390742?mt=12

  I’ve also used FFMPEG library for that, but that is also slow I did not found that library anymore useful.

  I’ve also tried to find the solution using other languages like, java, python. but did not found any solution was found.

  If anyone has the solution for this particular problem, or has some libraries (i.e Paid library or Open Source Library) that can do the compression with less time at least 1 minute... Please do share with me. Or some other piece of code that can overcome the compression time problem from 20 - 30 minutes to at least 1 minute.

  Thanks...

• Use Google Analytics and risk fines, after CJEU ruling on Privacy Shield

  27 août 2020, par Joselyn Khor — Privacy
  EU websites using Google Analytics and Facebook are being targeted by European privacy group noyb after the invalidation of the Privacy Shield. They filed a complaint against 101 websites for continuing to send data to the US. 

  “A quick analysis of the HTML source code of major EU webpages shows that many companies still use Google Analytics or Facebook Connect one month after a major judgment by the Court of Justice of the European Union (CJEU) - despite both companies clearly falling under US surveillance laws, such as FISA 702. Neither Facebook nor Google seem to have a legal basis for the data transfers.”

  

  The Privacy Shield previously allowed for EU data to be transferred to the US. However, this was invalidated by the Court of Justice of the European Union (CJEU) on July 16, 2020. The CJEU deemed it illegal for any websites to transfer the personal data of European citizens to the US. 

  They also made it clear in a press release that “data subjects can claim compensation for inadmissible data exports (marginal no. 143 of the judgment). This should in particular include non-material damage (“compensation for pain and suffering”) and must be of a deterrent amount under European law.” Which puts extra financial pressure on websites to take the new ruling seriously.

  Immediate action is required after Google Privacy Shield invalidation

  The Berlin Commissioner for Data Protection and Freedom of Information therefore calls on all those responsible under its supervision to observe the decision of the ECJ [CJEU]. Those responsible who transfer personal data to the USA - especially when using cloud services - are now required to immediately switch to service providers in the European Union or in a country with an adequate level of data protection.

  As the ruling is effective immediately, there’s a pressing need for websites using Google Analytics to act, or face getting fined.

  What does this mean for you ?

  If you’re using Google Analytics the safest bet is to stop using it immediately. 

  "Neither Google Analytics nor Facebook Connect are necessary for the operation of these websites and could therefore have been replaced or at least deactivated in the meantime."

  If you still need to use it, then you’ll need to inform your visitors via a clear consent screen. This banner needs to make clear their personal data will be sent to the US, and to educate them about any potential risk related to this. They will then need to explicitly agree to this. 

  Another downside of cookie consent screens is that you may also suffer a damaging loss of visitors. After implementing cookie consent best practices, the UK’s data regulator the Information Commissioner’s Office (ICO) found a 90% drop in traffic, “implying a ninety percent drop in opt-in rates.”

  With an acceptance rate for such consent screens being lower than 10% your analytics becomes guesswork rather than science. 

  Looking for a privacy-respecting alternative to Google Analytics ?

  Privacy compliant Matomo Analytics is one of the best Google Analytics alternatives availalble. 

  With Matomo you’re able to continue using analytics without facing the wrath of both the GDPR and the CJEU. Matomo On-Premise lets you choose where your data is stored, so you can ensure no data is processed in the US. 

  Matomo is privacy-friendly and can be tweaked to comply with all privacy laws. Including the GDPR, HIPAA, CCPA and PECR. The benefits of this include : not needing to use tracking or cookie consent screens (like with GA) ; and avoiding fines because no personal data is collected. You also get 100% accurate data and the ability to protect your user’s privacy.

  Download Matomo

  

  Is your EU business at risk of being fined for using Google Analytics ?

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