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• Ffmpeg command to most efficiently merge mp3 audio file and jpeg image file to a video file [closed]

  25 juin 2020, par Eugen

  I'm looking for an efficient way to merge a large .mp3 file and a single .jpg image to a video format for youtube. If I use :

  



  ffmpeg -loop 1 -i image.jpg -i audio.mp3 -c:v libx264 -c:a aac -strict experimental -b:a 192k -shortest output.mp4


  



  the result is very slow, especially for large .mp3 files. Is it possible to do it more efficiently with ffmpeg ? I know there must be a way to do it much more efficiently, like all the online converters are doing it.

  


• php auto FFmeg encoding shell scrip failing - but command works in cmd [closed]

  11 mars 2020, par altruios

  $dateString = strtotime("now");
  
  $cmd = 'C:\xampp\htdocs\gameOfLife\images>ffmpeg -r 19 -f image2  -i image_%d.png output_'.$dateString.'.mov';
  
  shell_exec($cmd);

  the above works in the command line-but when trying to execute in php it does nothing.
  I am not getting errors, just no result.
  but when I navigate to the folder in the command line, and run that line - it creates a video correctly.
  I’ve checked that shell_exec() is in fact available to use.
  the string outputs fine - so it’s not the date.
  is the start of the cmd correct ?
  I’m a bit green on the command line in general, and could use some clarification on where I’m going wrong.

  EDIT1 : shell_exe() executes stuff, but is not executing ffmpeg ;

  shell_exec("C:/xampp/htdocs/gameOfLife/images/image_1.png");

  opens the image.
  so the shell_exec as been changed to :

  shell_exec("C:/xampp/htdocs/gameOfLife/images/ffmpeg -r 19 -f image2  -i image_%d.png output_t2.mov");

  I’ve tried static names instead of having any date variable in there to keep things simple.

  when that text runs in the console : it works.

  however, when running it though php and the server - I can’t access ffmpeg, where I can access the calc and the image just fine through php.
  So I think I ruled out the path and access issues...

  and i can type the above and get an encoded video back if i do it though the console.
  but I can’t seem to make it run via php.

• ffmpeg - How to auto crop Harry Potter moving newspaper style video ?

  18 mai 2019, par hahahhhhhha

  The Harry Potter moving newspaper is like a video overlay on a static background. Here is an example youtube video :
  https://youtu.be/qQUUNmd3aco?t=1m17s the video starting from 1min, 17sec.

  HOWTO crop only the video part ? I have an image to show what i mean by the moving newspaper and what area does the video locate and what is the static background part. Please refer to the image. The area I draw by pink is where i mean by real video and any area except the video, is the static part.

  here is an illustration image :
  https://imgur.com/s6vRqek

  I understand if the frame size of the video does not change, I can specify the w, h, x, y to crop. But what if the frame size changes ? ie. w, h, x, y changes.(w, h : width, height of the video. x, y： Coordinate system starting point ) Is there a way to autodetect the static part and only crop the real video part ? like ffmpeg cropdetect for letterboxing. I tried cropdetect but failed. Any suggestion is welcome and I prefer using ffmpeg but any other softwares are welcome !