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• How to create a thumbnail from the middle of a video with FFmpeg

  3 août 2016, par Arman

  how to generate thumbnail from the middle of video using ffmpeg..

  e.g i have a video of duration 1 minute i want to generate thumbnail on 30th second

  i have used the following code but it generate thumbnail at 59th second. i because i mention -ss 59 how can we make it dynamic to the middle of video duration.

  ffmpeg -i input.mp4 -deinterlace -an -ss 59 -f mjpeg -t 1 -r 1 -y -s 256x160 output.jpg

  i tried that but i am getting error no directory found.

  ffmpeg -i input.mp4 -vcodec mjpeg -vframes 1 -an -f rawvideo -ss `ffmpeg -i clip.mp4 2>&1 | grep Duration | awk '{print $2}' | tr -d , | awk -F ':' '{print $3/2}'` output.jpg

  thanks in advance.

• Minimum PHP/Server Requirements for Yii 2

  12 avril 2015, par Future King

  I tried to run my yii2 app on my web hosting (It has PHP5.4 and Linux Server). But when I tried to upload files then it showed me error that Fileinfo extension is not installed. I asked the server guys and they told me that they can not enable that extension because it is a shared hosting.

  I tried the same app on some other hosting. I received this error :

  PHP Startup : Unable to load dynamic library ’/usr/local/lib/php/extensions/no-debug-non-zts-20100525/ffmpeg.so’ - /usr/local/lib/php/extensions/no-debug-non-zts-20100525/ffmpeg.so : cannot open shared object file : No such file or directory

  I want to know, what are the minimum server requirements (or required PHP extensions) for Yii2, so that I can find another host according to that.

• Container does not reflect MediaReader setting

  8 mars 2014, par Mondain

  I would like my reader to be able to handle audio, when it does not start with the video ; hence the setting of "AddDynamicStreams". How do I get the container to recognize the setting of the reader from which it originated ? Is there a flag or some other property that I need to set ?

  String inputUrl = "rtmp://127.0.0.1:1935/myapp/mystream live=1 buffer=1";
  
  IMediaReader reader = ToolFactory.makeReader(inputUrl);
  
  reader.setCloseOnEofOnly(false);
  
  reader.setQueryMetaData(false);
  
  // we want dynamic addition of streams
  
  reader.setAddDynamicStreams(true);
  
  // this shows "true"
  
  log.debug("Reader can dynamically add streams: {}", reader.canAddDynamicStreams());
  
  // get the container
  
  IContainer container = reader.getContainer();
  
  // this shows "false"
  
  log.debug("Container can dynamically add streams: {}", container.canStreamsBeAddedDynamically());