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• Android video encoding with fr and resolution manipulation

  24 février 2017, par apSTRK

  I want to be able to take a video recorded with an Android device and encode it to a new Resolution and Frame Rate using my app. The purpose is to upload a much smaller version of the original video (in size), since this will be videos 30 min long or more.

  So far, I’ve read of people saying FFmpeg is they way to go. However, the documentation seems to be lacking.

  I have also considered using http opencv http://opencv.org/platforms/android.html

  Considering I need to manipulate the video resolution and frame rate, which tool do you think can do such things better ? Are there any other technologies to consider ?

  An important question is, since this will be long videos, is it reasonable to do the encoding in an android device (Consider power resources, time, etc.)

  Thanks in advance !

• How to put watermak on video with FFMPEG,without resizing the watermark because of video resolution ?

  22 mai 2014, par Shahbaz Younis

  I’m looking for a way that the watermark picture does not get resized,if the video resolution is high or less. Right now I have this problem, if I upload a video like 720p the watermark is really small and when I upload a video that is 240p the watermark is really big. I would just like it to be only one size. Can it do that automatically ? So no matter what the resolution is the of the video the image does not resizes and stays where I put it ? Here’s the code I’m using right now

  if ($ffmpeg_ver == "old") {
  
                      $watermark = '-vf "movie='.$tv_logo_path.' [watermark]; [in][watermark] overlay=10:10 [out]" ';
  
              } else { 
  
                      $watermark = '-i '.$tv_logo_path.' -filter_complex "overlay=10:10" ';
  
              }

• batch converting in ffmpeg from jgp to gif while changing the resolution

  15 janvier 2018, par zlbooth

  Hi this is my first post - excuse how basic it is !

  I’ve got a line for batch converting jpg to gif in Mac

  for i in *.JPG; do 
  
     ffmpeg -i "$i" "${i%.*}.gif"
  
  done

  This line is from Lord Neckbeard’s answer to this post. How do you convert an entire directory with ffmpeg ?

  I just want to add one more parameter which is batch converting the resolution as well as the file type.
  inputting this doesn’t work :

  for i in *.JPG; do 
  
     ffmpeg -i "$i" -s:v 640x480 "${i%.*}.gif"
  
  done

  Any solutions much appreciated !