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• PHP&FFMPEG, How to make sure the result video is suitable for web browsers ?

  30 juillet 2016, par Drupalist

  I need to split a section of a video, paste a logo and also blur a video online. I know how to do these but the problem is, I don’t know how to make sure that the result video is suitable for web. For example there is a mp4 video in my website which is playing via the browser, and using this code I cut a section of it :

  exec("ffmpeg -i ".$source." -ss ".$start." -to ".$end."  -c copy ".$newVideo);

  The problem is, when the distance between $start and $end is more than a few minutes, the split operation is done but it is not played via browser.

  What codec or library do I need to add as filter to make sure that the result video is always playing on all modern browsers ?

• FFmpeg Flags for generating fixed amount of images related to video length

  27 octobre 2015, par Sutekh

  I am using this command :

  ffmpeg -i file.mp4 -vf fps=1/60 -s 274x175  thumb%d.png

  to extract 1 frame from video for every minute of it.
  What i want to learn how to do is :
  Extract a total of 10 images from video regardless of its length that are relative to distance of video.

  Example :

  1.If video length is 15 minutes (900 seconds) it will extract one image from every 90 seconds of video.
  2.If video length is 22 minutes (1320 seconds) it will extract one image from every 132 seconds of video.

  And one more thing , is it possible to use ffmpeg to set output quality of those images or limit maximum size(as in file size , not dimensions) for each image that is going to get outputted ?

• CaptionManager - easily add and remove captions from QT movies

  18 février 2010

  Cough. Yeah. Remember this blog ? Right then.

  Here’s a new little app to add and remove caption tracks (SCC files) from Quicktime files. In theory you can do this with Quicktime Pro, but it doesn’t seem to work so well anymore.

  This zip file includes the source for the app, Xcode project, and a compiled build.

  Basically, you can open a quicktime movie, and it’ll detect whether there are already captions or not. Then you can strip the captions if they already exist (plus an associated TC track) or add new captions from an SCC file. You’ll either need to be on Snow Leopard or have the Caption Component installed. The built version is Intel only, though you could probably compile a PPC version if you were so inclined.

  The app writes out a new file, rather than updating in place, due to some limitations in QTKit.

  For the command line, running ./CaptionManager.app/Contents/MacOS/CaptionManager -help will give you the relevant info.

  No license attached, because I still don’t understand the implications of BSDing stuff created on the University’s dime.

  CaptionManager.zip

  Oh also, the GUI leaks a little memory. Deal. I’ve also posted a screencast of the app.