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• Validation failed : Video Paperclip::Errors::NotIdentifiedByImageMagickError

  28 mars 2017, par ACIDSTEALTH

  I have a model with an attached video. I want to create a scaled version of the video along with a series of thumbnails. I have the following setup :

  has_attached_file :video,
  
      styles: {
  
          original: { format: 'mp4', processors: [:transcoder] },
  
          large: { geometry: "720x720", format: 'jpg', processors: [:thumbnail] },
  
          medium: { geometry: "540x540", format: 'jpg', processors: [:thumbnail] },
  
          thumb: { geometry: "180x180", format: 'jpg', processors: [:thumbnail] }
  
      },
  
      default_url: ""

  When I test this in my development environment it works perfectly. The video and all images are correctly sized. When I deploy to Heroku however, I get the following error :

  Validation failed: Video Paperclip::Errors::NotIdentifiedByImageMagickError
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/validations.rb:78:in `raise_validation_error'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/validations.rb:50:in `save!'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/attribute_methods/dirty.rb:30:in `save!'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/transactions.rb:324:in `block in save!'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/transactions.rb:395:in `block in with_transaction_returning_status'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/connection_adapters/abstract/database_statements.rb:232:in `block in transaction'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/connection_adapters/abstract/transaction.rb:189:in `within_new_transaction'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/connection_adapters/abstract/database_statements.rb:232:in `transaction'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/transactions.rb:211:in `transaction'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/transactions.rb:392:in `with_transaction_returning_status'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/transactions.rb:324:in `save!'
  
  /app/vendor/bundle/ruby/2.3.0/gems/activerecord-5.0.2/lib/active_record/suppressor.rb:45:in `save!'
  
  /app/app/models/concerns/snapshot_methods.rb:37:in `copy_from_ziggeo!'
  
  /app/app/workers/snapshot_transcoder.rb:16:in `perform'
  
  /app/vendor/bundle/ruby/2.3.0/gems/resque-status-0.5.0/lib/resque/plugins/status.rb:161:in `safe_perform!'
  
  /app/vendor/bundle/ruby/2.3.0/gems/resque-status-0.5.0/lib/resque/plugins/status.rb:137:in `perform'

  What am I missing here ? I’ve searched for NotIdentifiedByImageMagickError and scanned numerous other questions on this issue, but have not had any success fixing my problem.

  Most of the solutions I’ve seen involve setting Paperclip.options[:command_path] = "/usr/bin/identify" in development. Since my problem is only on production, I tried applying this to production, subbing in the correct path for my production environment, like so :

  Paperclip.options[:command_path] = "/app/vender/imagemagick/bin/identify"

  This had no effect. Neither did /app/vender/imagemagick/bin.

• How to improve the performance of Audio Queue Services when playing audio ?

  11 décembre 2014, par 谢小进

  I want to play RTMP’s H.264/AAC using FFmpeg for decoding and playing video, Audio Queue Services for playing audio. I have successfully done them all, but still some tough issues, for example high memory allocation when playing audio. I have debugged and found that Audio Queue Services lead to high memory allocation, and then crash ! Does anybody know how to improve the memory performance ? Here is my code for Audio Queue Services playing audio.

  //
  
  //  RTMPAudioPlayer.h
  
  //
  
  
  
  #import <foundation></foundation>Foundation.h>
  
  #import <audiotoolbox></audiotoolbox>AudioToolbox.h>
  
  
  
  @interface AQBuffer : NSObject
  
  
  
  @property (nonatomic) AudioQueueBufferRef buffer;
  
  
  
  @end
  
  
  
  
  
  @interface RTMPAudioPlayer : NSObject {
  
      AudioQueueRef queue;
  
      AudioStreamBasicDescription dataFormat;
  
      NSMutableArray *buffers;
  
      NSMutableArray *reusableBuffers;
  
  }
  
  
  
  - (id)initWithSampleRate:(int)sampleRate channels:(int)channels bitsPerChannel:(int)bitsPerChannel;
  
  - (void)start;
  
  - (void)stop;
  
  - (void)putData:(NSData *)data;
  
  
  
  @end
  
  
  
  
  
  
  
  
  
  //
  
  //  RTMPAudioPlayer.m
  
  //
  
  
  
  #import "RTMPAudioPlayer.h"
  
  
  
  static const int kNumberBuffers = 3;
  
  static const int kBufferSize    = 0xA000;
  
  
  
  @implementation AQBuffer
  
  
  
  @end
  
  
  
  
  
  @implementation RTMPAudioPlayer
  
  
  
  void AQOutputCallback(void *inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inCompleteAQBuffer) {
  
      RTMPAudioPlayer *THIS = (__bridge RTMPAudioPlayer *)inUserData;
  
      [THIS handleAQOutputCallback:inAQ buffer:inCompleteAQBuffer];
  
  }
  
  
  
  - (void)handleAQOutputCallback:(AudioQueueRef)audioQueue buffer:(AudioQueueBufferRef)buffer {
  
      for (int i = 0; i &lt; [buffers count]; ++i) {
  
          if (buffer == [buffers[i] buffer]) {
  
              [reusableBuffers addObject:buffers[i]];
  
              break;
  
          }
  
      }
  
  }
  
  
  
  - (id)initWithSampleRate:(int)sampleRate channels:(int)channels bitsPerChannel:(int)bitsPerChannel {
  
      self = [super init];
  
      if (self) {
  
          memset(&amp;dataFormat, 0, sizeof(dataFormat));
  
          dataFormat.mSampleRate = sampleRate;
  
          dataFormat.mFormatID = kAudioFormatLinearPCM;
  
          dataFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsPacked;
  
          dataFormat.mBitsPerChannel = bitsPerChannel;
  
          dataFormat.mChannelsPerFrame = channels;
  
          dataFormat.mFramesPerPacket = 1;
  
          dataFormat.mBytesPerFrame = (dataFormat.mBitsPerChannel / 8) * dataFormat.mChannelsPerFrame;
  
          dataFormat.mBytesPerPacket = dataFormat.mBytesPerFrame * dataFormat.mFramesPerPacket;
  
      }
  
      return self;
  
  }
  
  
  
  - (void)start {
  
      OSStatus status = AudioQueueNewOutput(&amp;dataFormat, AQOutputCallback, (__bridge void *)self, NULL, NULL, 0, &amp;queue);
  
      if (status == noErr) {
  
          buffers = [NSMutableArray array];
  
          reusableBuffers = [NSMutableArray array];
  
          for (int i = 0; i &lt; kNumberBuffers; i++) {
  
              AudioQueueBufferRef buffer;
  
              status = AudioQueueAllocateBuffer(queue, kBufferSize, &amp;buffer);
  
              if (status == noErr) {
  
                  AQBuffer *bufferObj = [[AQBuffer alloc] init];
  
                  bufferObj.buffer = buffer;
  
                  [buffers addObject:bufferObj];
  
                  [reusableBuffers addObject:bufferObj];
  
              } else {
  
                  AudioQueueDispose(queue, true);
  
                  queue = NULL;
  
                  break;
  
              }
  
          }
  
  
  
          AudioQueueStart(queue, NULL);
  
      } else {
  
          queue = NULL;
  
      }
  
  }
  
  
  
  - (void)stop {
  
      if (queue) {
  
          AudioQueueStop(queue, true);
  
      }
  
  }
  
  
  
  - (void)putData:(NSData *)data {
  
      AQBuffer *bufferObj = [reusableBuffers firstObject];
  
      [reusableBuffers removeObject:bufferObj];
  
      AudioQueueBufferRef buffer;
  
      OSStatus status = AudioQueueAllocateBuffer(queue, kBufferSize, &amp;buffer);
  
      if (status == noErr) {
  
          bufferObj = [[AQBuffer alloc] init];
  
          bufferObj.buffer = buffer;
  
  
  
          memcpy(bufferObj.buffer->mAudioData, [data bytes], [data length]);
  
          bufferObj.buffer->mAudioDataByteSize = [data length];
  
  
  
          AudioQueueEnqueueBuffer(queue, bufferObj.buffer, 0, NULL);
  
      }
  
  }
  
  
  
  @end

• avformat/mxfdec : Don't pretend array to be bigger than it is

  11 septembre 2023, par Andreas Rheinhardt

  avformat/mxfdec : Don't pretend array to be bigger than it is
  mxf_match_uid() accepts two const UID and a len parameter.
  
  UID is a typedef for an array of 16 uint8_t, so the const UID
  
  parameter is actually a pointer to const uint8_t.
  The point of mxf_match_uid() is to check whether the initial
  
  part of two UIDs match ; the length of said part is given
  
  by the len parameter. Once an incomplete UID has been passed
  
  to mxf_match_uid() (albeit with the correct len, so safe),
  
  which makes GCC emit -Wstringop-overread warnings.
  Fix this by using a const uint8_t[] as type ; it is more
  
  natural for incomplete UIDs.
  Reviewed-by : Tomas Härdin <git@haerdin.se>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/mxfdec.c