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• FFmpeg - Putting a Lower bitrate of my video stream in my current mp4 container

  10 avril 2014, par Campiador

  Sorry if my question is too noobish, this is my first FFmpeg experience.

  What I have is :

  An mp4 movie with a video stream and an audio stream.

  What I want in the output :

  Is an mp4 file containing : the same video stream + the same audio stream + the same video stream with a lower bit-rate

  Can anyone please tell me the appropriate ffmpeg command ?

• "playback error" in Powerpoint using FFMEG conversion

  3 avril 2014, par John Du

  I tried the following command to convert a mov to wmv to play back in powerpoint

  ffmpeg -i movie.mov -b 1500k -vcodec wmv2 -acodec wmav2 -f asf movie.wmv

  I am constantly plaugued with "playback error"s no other information

  any help would be appreciated what settings to use that will not cause this error

• How to join two ffmpeg commands

  26 novembre 2012, par Ambrose Bwangatto

  i have a script which uses this ffmpeg command's parameters for encoding videos.

  ffmpeg -i inputfile -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 outputfile

  and i have a custom command i would like to add to it, is like this

  ffmpeg -i inputfile -vf "movie=watermark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile

  so i replaced main command like this

   ffmpeg -i inputfile -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 -vf "movie=watermark1.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile

  and tried it in command line, but this doesnt do anything, the output is nothing like this

  [root@www test1]#  ffmpeg -i test1800.mp4 -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 -vf "movie=watermark1.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile.mp4
  
  [root@www test1]#

  how do i solve this ?

  Thanks for your time.

  UPDATE
  My ffmpeg command details

  [root@www test1]# ffmpeg
  
  ffmpeg version N-47061-gbe2c0bc Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Nov 25 2012 09:32:08 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-52)
  
    configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
  
    libavutil      52.  9.100 / 52.  9.100
  
    libavcodec     54. 77.100 / 54. 77.100
  
    libavformat    54. 37.100 / 54. 37.100
  
    libavdevice    54.  3.100 / 54.  3.100
  
    libavfilter     3. 23.102 /  3. 23.102
  
    libswscale      2.  1.102 /  2.  1.102
  
    libswresample   0. 17.101 /  0. 17.101
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
  
  
  
  Use -h to get full help or, even better, run 'man ffmpeg'

  thanks