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• "FFMPEG not found" even though ffmpeg-binaries have been added to the package.json

  17 août 2018, par Xyvyrianeth

  I keep my bot online using Heroku, so installing FFMPEG to my computer wouldn’t really help me any.

  The issue is that I’m still getting this error despite having the npm ffmpeg-binaries added to my package.json’s dependencies. I’ve also tried using git URLs from Github and the official FFMPEG website, as well as trying to install the git directly using the run-command option in Heroku’s application page, but I keep getting this same error. Am I missing something ?

• Is it possible to merge two or more videos in real-time like this ?

  25 février 2015, par Marko

  Is it possible to play video online that’s made of two or more video files ?

  Since my original post wasn’t clear enough, here’s expanded explanation and question.

  My site is hosted on Linux/Apache/PHP server. I have video files in FLV/F4V format. I can also convert them to other available formats if necessary. All videos have same aspect ratio and other parameters.

  What I want is to build (or use if exist) online video player that plays video composed of multiple video files concatenated together in real-time, i.e. when user clicks to see a video.

  For example, visitor comes to my site and sees video titled "Welcome" available to play. When he/she clicks to play that video, I take video files "Opening.f4v", "Welcome.f4v" and "Ending.f4v" and join/merge/concatenate them one after another to create one continuous video on the fly.

  Resulting video looks like one video, with no visual clues, lags or even smallest observable delay between video parts. Basically what is done is some form of on-the-fly editing or pre-editing, and user sees the result. This resulting video is not saved on the server, it’s just composed and played that way real-time.

  Also, if possible, user shouldn’t be made to wait for this merging to be over before he/she sees resulting video, but to be able to get first part of the video playing immediately, while merging is done simultaneously.

  Is this possible with flash/actionscript, ffmpeg, html5 or some other online technology ? I don’t need explanation how it’s possible, just a nod that it’s possible and some links to further investigate.

  Also, if one option is to use flash, what are alternatives for making this work when site is visited from iphone/ipad ?

• vf_showinfo : minimum widths for some early fields

  15 janvier 2015, par Peter Cordes

  vf_showinfo : minimum widths for some early fields
  Depending on FPS, the pts_time string often changes length :
  
  ... pts_time:36.1 ...
  
  ... pts_time:36.1333 ...
  
  etc.
   The length changes make the output bounce around horribly, making it
  
  hard to scan down a column farther right than pts_time.
  The solution is to set minimum widths for n, pts, pts_time, and pos.
  
  This patch doesn’t touch any of the fields in mean / stddev.
   The widths aren’t intended to be wide enough that they’re never
  
  exceeded, but you’ll see only an occasional ripple to a new alignment,
  
  rather than bouncing.  (Some fields, like pos, increase monotonically,
  
  which is why I left the minimum width for the field be smaller than it
  
  often gets to.)
  Signed-off-by : Peter Cordes <peter@cordes.ca>
  

  • [DH] libavfilter/vf_showinfo.c