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• Find video resolution and video duration of remote mediafile

  22 février 2012, par osgx

  I want to write an program which can find some metainformation of mediafile. I'm interested in popular video formats, such as avi, mkv, mp4, mov (may be other popular too). I want basically to get :

  • Video size (720, 1080, 360 etc)
  • Total runtime of video (may be not very exact)
  • Number of audio streams
  • Name of video codec
  • Name of audio codec

  There is already the mediainfo, but in my program I want to get information about remote file, which may be accessed via ftp, http, samba ; or even torrent (there are some torrent solutions, which allows to read not-yet downloaded file).

  MediaInfo library have no support of samba (smb ://) and mkv format (for runtime).

  Also, I want to know, how much data should be downloaded to get this information. I want not to download full videofile because I have no enough disk space.

  Is this information in the first 1 or 10 or 100 KiloBytes of the file ? Is it at predictable offset if I know the container name and total file size ?

  PS : Platform is Linux, Language is C/C++

• How to create video with dynamic pictures like Facebook Friend's Day video

  21 février 2019, par Vinicius

  How to create a video with pictures from a user just like Facebook does with their Facebook Friend’s day video ?

  Example : https://www.youtube.com/watch?v=mNWJ_XxfQfU

  The intention is to generate this sort of video with images that a visitor will upload to a website. FFMPEG does support images animation but it seems that a bit of 3d animations like the above needs ages to be done with FFMPEG. I wonder if there is an alternative to FFMPEG that can generate this sort of animations, or maybe a software like After Effects that can either generate a template that can be used on ffmpeg (or any command line alternative) or has its own command-line interface that can be executed in a linux machine to do such thing.

  Basically, the user would upload the pictures, the server would crop them to have the same size and then it would convert it to a video like the one mentioned above.

• How to reduce the file size during conversion of video from any video to mp4 using ffmpeg &mp4box in PHPmotion ?

  6 mars 2016, par Balaji Kandasamy

  I am using ffmpeg & mp4box in my PHPmotion site to convert videos to mp4 format. When I convert a 50MB video to mp4, the file size remain same. So Its affecting the video streaming in my site. So I want to reduce the file size of the video in conversion. This is my code example, that I’ve used the site for converting m4v videos in PHPmotion.

  $ffmpeg_cmd2_2 = "$config[path_to_ffmpeg] -i $raw_video_path -vcodec libx264 -vpre veryfast -crf 15 -b 5120000 -threads 0 -acodec libfaac -ac 2 -ab 128k -ar 44100 -f mp4 $new_flv_1";
  
  $mp4box_cmd = "$mp4box_path -add $new_flv_1 $new_flv_2" 

  When I use this command,it converts the m4v file to mp4 format, but the filesize doesn’t change. What command I should use in this to reduce the filesize during video conversion in PHPmotion ? Can anyone write a ffmpeg command to reduce the filesize during conversion ?