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• ffmpeg quality with watermark

  17 juin 2012, par trialgod

  i want to add a watermark to a video with ffmpeg. At this time nearly all things are computing properly, except the quality of the new video is massively lower than in the one of the original video.

  I also use ffmpeg-php and tried to set the minrate to the Bitrate of the original, but then i get an Error. Code seems like this at the moment.

  $video     = new ffmpeg_movie('hot_wheels_for_adults.flv');
  
  $watermark = 'path/to/watermark.png';
  
  $width     = $video->getFrameWidth();
  
  $height    = $video->getFrameHeight();
  
  $exec = 'ffmpeg -i hot_wheels_for_adults.flv ' .
  
          '-y -vf "movie=' . $watermark . ' ' .
  
          '[watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" ' .
  
          '-f flv -s ' . $width . 'x' . $height . ' ' .
  
          '-minrate ' . $video->getBitRate() . ' ' .
  
          'bla2.flv';

  Thats it. Without the '-minrate' line the quality isnt good.
  Originalrate = 630615,
  Rate of new Video = 328000.

  With the '-sameq' flag i got a good quality, but it is raised from 6,5MB to nearly 30MB...

  What can i do now ?

• Merge filename.mp4.tmp with filename.mp4

  10 janvier 2017, par Sathish

  How to merge a abc.mp4.tmp swap file with actual abc.mp4 file. I was trying to recording a live event using Wowza Media server 3.6 and the recorded file was not muxed properly at final moment. The abc.mp4.tmp swap file was not merged with actual abc.mp4 file. So could someone tell me how to merge the abc.mp4.tmp and abc.mp4 file and creates a new file and I can able to play with vlc

  Here is the mediainfo of the files

  [root@ip-ss-21-98-2 content]# mediainfo 03_03_2014_12_03_08.mp4
  
  General
  
  Complete name                            : 03_03_2014_12_03_08.mp4
  
  Format                                   : MPEG-4
  
  Format profile                           : Adobe Flash
  
  Codec ID                                 : f4v 
  
  File size                                : 5.20 GiB
  
  
  
  
  
  [root@ip-ss-21-98-2 content]# mediainfo 03_03_2014_12_03_08.mp4.tmp
  
  General
  
  Complete name                            : 03_03_2014_12_03_08.mp4.tmp
  
  File size                                : 38.3 MiB

• Joining and cutting mpeg 2 video files

  4 janvier 2012, par D.Rosado

  I have multiple mpeg2 video files. What I need to do is get a clip of video that is contained in several of these mpeg2 videos. What I'm doing at the moment is :

  • Join them using the command :

        copy /b file1.mpg + ... + fileN.mpg output.mpg

  • The ouput.mpg duration is wrong so I'm using FFMpeg to fix that :

        ffmpeg -y -i output.mpeg -target pal-dvd outputFixed.mpg

  The problem is when I try to extract only one portion of this output.mpg, at the same time I "fix" it, with the -ss and -t FFMpeg commands becouse the video duration is wrong as i said.

  So the question is :

  • Is there any way to combine Mpeg2 files without getting the duration wrong ?
  • Is there any way to fix the duration of a Mpeg2 file and extract one portion at the same time ?

  Any suggestion would be appreciated.