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• FFmpeg conversion to Photo-JPEG is blocky [duplicate]

  26 mai 2017, par Richard210363

  This question already has an answer here :

  • ffmpeg generate higher quality images for MJPEG encoding
    
    1 answer
    

  I am converting .mp4 files to .mov with the Photo-JPEG codec to use in After Effects to reduce render times.

  I have looked up the FFmpeg commands to do this and come up with :

  ffmpeg -i tower-bridge.mp4 -an -pix_fmt yuvj420p -vcodec mjpeg -f mov -y tower-bridge.mov 

  This works but when I look at the output video it is quite blocky ; like a mosaic.

  During the conversion I get this message :

  [swscaler @ 0000000008c97fe0] deprecated pixel format used, make sure you did set range correctly

  Research on-line suggests I can ignore this message.

  What can I do to improve the output quality ?

  MediaInfo report on Input file :

  Complete name : F :\london-tower-bridge.mp4
  Format : MPEG-4
  Format profile : Base Media
  Codec ID : isom (isom/avc1/mp42)
  File size : 18.7 MiB
  Duration : 13 s 625 ms
  Overall bit rate : 11.5 Mb/s
  

  ID : 1
  Format : AVC
  Format/Info : Advanced Video Codec
  Format profile : Baseline@L4
  Format settings, CABAC : No
  Format settings, ReFrames : 3 frames
  Codec ID : avc1
  Codec ID/Info : Advanced Video Coding
  Duration : 13 s 625 ms
  Bit rate : 11.5 Mb/s
  Maximum bit rate : 26.8 Mb/s
  Width : 1 920 pixels
  Height : 1 080 pixels
  Display aspect ratio : 16:9
  Frame rate mode : Constant
  Frame rate : 24.000 FPS
  Color space : YUV
  Chroma subsampling : 4:2:0
  Bit depth : 8 bits
  Scan type : Progressive
  Bits/(Pixel*Frame) : 0.231
  Stream size : 18.7 MiB (100%)
  Writing library : Zencoder Video Encoding System
  

  MediaInfo report on Output file :

  Complete name : F :\london-tower-bridge.mov
  Format : MPEG-4
  Format profile : QuickTime
  Codec ID : qt 0000.02 (qt )
  File size : 16.1 MiB
  Duration : 13 s 625 ms
  Overall bit rate mode : Variable
  Overall bit rate : 9 912 kb/s
  Writing application : Lavf57.72.101
  

  ID : 1
  Format : JPEG
  Codec ID : jpeg
  Duration : 13 s 625 ms
  Bit rate mode : Variable
  Bit rate : 9 910 kb/s
  Width : 1 920 pixels
  Height : 1 080 pixels
  Display aspect ratio : 16:9
  Frame rate mode : Constant
  Frame rate : 24.000 FPS
  Color space : YUV
  Chroma subsampling : 4:2:0
  Bit depth : 8 bits
  Scan type : Progressive
  Compression mode : Lossy
  Bits/(Pixel*Frame) : 0.199
  Stream size : 16.1 MiB (100%)
  Language : English
  

• Malformed header from CGI script

  13 janvier 2014, par user3188518

  This message is driving me crazy :

  Malformed header from CGI script:
  
  ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on May 10 2013 16:31:05 with gcc 4.8.0 (GCC) 20130502 (prerelease)
  
    configuration: --prefix=/usr --disable-debug --disable-static --enable-avresample --enable-dxva2 --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-postproc --enable-runtime-cpudetect --enable-shared --enable-vdpau --enable-version3 --enable-x11grab
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, wav, from '/projekt/aplikacja/app/92ed9478ecfa4a4dfb176f417d4ef66c/2014-01-12-220148_sample_1.wav':
  
    Duration: 00:02:35.62, bitrate: 1411 kb/s
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
  
  Output #0, wav, to '/projekt/aplikacja/app/webroot/files/preview/2014-01-12-234038_52d327f6b2939.wav':
  
    Metadata:
  
      ISFT            : Lavf54.63.104
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, 1411 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
  Press [q] to stop, [?] for help
  
  size=     864kB time=00:00:05.01 bitrate=1411.3kbits/s    
  
  video:0kB audio:864kB subtitle:0 global headers:0kB muxing overhead 0.009042%
  
  Status: 302
  
  Location: http://www.example.org/
  
  Content-type: text/html

  After executing this function :

     public function createpreview(){
  
           if ($this->request->is('post')) {
  
             foreach($this->request->data['TrackId'] as $key => $value){
  
                  $TrackId[] = $key;
  
              }
  
              $this->Track->recursive = -1;
  
              $view =  $this->Track->find('all', array(
  
                                'conditions' => array(
  
                                "Track.id" => $TrackId
  
                                 )));
  
              ini_set('date.timezone', 'Europe/London');
  
  
  
             foreach ($view as $v){
  
                $comand_1 = 'ffmpeg -i '.APP.'92ed9478ecfa4a4dfb176f417d4ef66c'.DS. $v['Track']['filename'].' 2>&1';
  
                $time_data = shell_exec($comand_1);
  
                $search = '/Duration: (.*?),/';
  
                $duration = preg_match($search, $time_data, $matches, PREG_OFFSET_CAPTURE, 3);
  
                $time = explode('.', $matches[1][0]);
  
                $time = explode(":", $time[0]);
  
                $seconds = $time[0]*3600 + $time[1]*60 + $time[2];
  
                if ($seconds >= 30){
  
  
  
               $now = date('Y-m-d-His');
  
                   $prew_file_name = $now .'_'. uniqid().'.wav';
  
                   $comand_2 = 'ffmpeg  -ss 00:00:25.000 -analyzeduration 99999999  -i '.APP.'92ed9478ecfa4a4dfb176f417d4ef66c'.DS. $v['Track']['filename'].' -t 5 -c:v copy -c:a copy '.WWW_ROOT.'files'.DS.'preview'.DS.$prew_file_name;
  
                      $t = shell_exec($comand_2);
  
                      $this->Track->updateAll(array('Track.preview' => "'.$prew_file_name.'"), array('Track.id' => $v['Track']['id']));
  
                    }
  
                 }
  
  
  
          }
  
           header('Location: http://www.example.org/');
  
         // $this->redirect(array('controller'=>'albums', 'action'=>'menage_index'));
  
     }

  As far as i know this shell_exec($comand_2) couses error (after i comment it out, it redirects me correctly).Googling this didn't gave me answers, the wierd part is previews aka shell_exec($comand_2) are made and fine, i just can't get it to redirect me. I tried non cake way but it doesn't work either.

  What I'm doing wrong ?

• Spotlight : Alwaysdata.com the company behind Piwik.org web hosting [Interview]

  11 avril 2013, par matt — About, Community

  Piwik is the result of the work of many talented individuals and companies. Today we’d like to showcase Alwaysdata.com, the awesome web hosting company providing managed hosting for all Piwik.org websites and services.

  I recently met and asked a few questions to Cyril, co-founder of Alwaysdata.com and Piwik core developer. Learn more in the interview below !

  

  1. What is Alwaysdata ?
  2. Who are your customers and what kind of work do you do ?
  3. What sets Alwaysdata apart from the large web hosting competition ?
  4. Are you using Piwik internally or with customers ? If so, how are you using Piwik ?
  5. What is the next big thing for Alwaysdata ?
  6. Learn more

  What is Alwaysdata ?

  We are a French web hosting company created in 2006. If you need to host a website — a Piwik installation, for example — or even your domains/emails, we provide infrastructure and maintenance services.

  Who are your customers and what kind of work do you do ?

  We have several types of clients :

  • Individuals who need hosting for their personal site and who benefit from storage space with direct SSH access.
  • Web agencies who need hosting for their clients’ sites.
  • The largest customers, often on dedicated servers, for hosting their site/infrastructure.

  Our work falls into three categories :

  1. Support (via administration, telephone, Twitter, IRC, etc.)
  2. Development (in Python), primarily to add new features
  3. System administration, either for maintenance (e.g. adding servers), or for preparing new features

  What sets Alwaysdata apart from the large web hosting competition ?

  Two things :

  • Availability. We are a small team and often know our customers quite well. We are all on IRC, so you can contact us directly if you need any assistance.
  • Features. We are halfway between traditional web hosting and the cloud, combining the advantages of both.

  Are you using Piwik internally or with customers ? If so, how are you using Piwik ?

  All of our customers can view statistics for their sites via our global Piwik installation, without having to configure anything.

  To provide these analytics reports to our customers, we implemented import of the raw access logs in Piwik. The Log import toolkit is now a feature included in Piwik.

  What is the next big thing for Alwaysdata ?

  We are going to upgrade our pricing : instead of fixed costs, each of our clients will now pay exactly what they consume. This allows our clients the benefit of a very high quality service for the lowest possible price.

  We are also going to add native support for more technologies : Java, Node.js, ZeroMQ, etc.

  Thank you for your time and all the best to Alwaysdata for the future !

  —

  Note from Matt, Piwik founder : Cyril and the team at Alwaysdata.com have been consistently great in their system administration work for Piwik.org services, providing a fast and reliable web hosting experience with top notch support and security practises. They also handled the migration of all services from our old servers with total piece of mind.

  Alwaysdata contributed to Piwik the popular Log Analytics toolkit. They are great software developers and system administrators with a passion for their work. Since 2006, they have been maintaining optimized hosting services for the entire web infrastructure (websites, domains, emails, databases, etc.), from the simplest to the most exotic. We do recommend their managed hosting services.

  Learn more

  • Visit their website at Alwaysdata.com
  • Learn more about their Managed hosting on dedicated servers
  • Learn more about other companies and individuals who make a difference in Piwik.