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• Horizontally show two videos side by side and export to one video

  15 juin 2015, par Michael Liberman

  What I am trying to achieve :
  Programmatically (using some kind of script) combine two different videos to one video where the videos are shown side by side and sound from both videos is played simultaneously.

  I found at least two ways I could display two videos side by side but in each one I have a different problem that makes it difficult to complete the process :

  1. Avisyth and Avs2Avi :
     Avisyth really makes the process easy. With a simple Avisyth script like this you should be able to play two videos side by side :

     video1=AVISource("d:\file1.avi")<br />
video2=AVISource("d:\file2.avi")<br />
StackHorizontal(video1,video2)

     The creation of a new output file can be done with avs2avi.
     The problem here is that i am not able to play even one avi file with avisyth because I get "AviSource couldn’t locate a decompressor for fourcc xvid" message. I googled for the solutions to that problem but nothing helped. GSpot says that i have all the codecs needed and it seems I can not do anything. Because I can not get to running real videos, I dont know if the final video plays sounds from both videos. Avisyth installed correctly and I am able to run the following script StackHorizontal(version ,version).

  2. ffmpeg
     Works like a charm with two videos and the final file BUT i do not get the sounds from both videos but only the first one. I found out that the solution to add sound from the second video will be by using the libfaac in the command line, like that :
     

     ffmpeg.exe -i video1.mp4 -vf "[in] scale=iw/2:ih/2, pad=2*iw:ih [left]; movie=video2.mp4, scale=iw/3:ih/3 [right]; [left][right] overlay=main_w/2:0 [out]" -c:a libfaac -b:v 768k Output.mp4

  but i always get an error that the encoder libfaac can not be found. I downloaded the libfaac.dll but still no result.

  Is there a solution to any of these problems ? Is there another way to programmatically make one video from two videos that are played side by side ? Thanks in advance.

• Show watermark at the beginning of the video

  19 mars 2013, par mente

  Need to add watermark for first 3 seconds the video using ffmpeg. Here's what I got right now :

  ffmpeg -y -i '255871.mov' -qscale:v 0 -qscale:a 0 -vf '[in] transpose=1 [out];movie=watermark.png , select=lte(t\,3) [bg]; [out][bg] overlay=x=20:y=main_h-60 [out]' output.mp4

  It rotates video to the right and adds watermark at the bottom of the video for first 3 seconds. The problem is watermark is visible during the whole video.

  Thought that select doesn't work at all. Tried following command

  ffmpeg -y -i '255871.mov' -qscale:v 0 -qscale:a 0 -vf '[in] transpose=1 [out];movie=watermark.png , select=0 [bg]; [out][bg] overlay=x=20:y=main_h-60 [out]' output.mp4

  Watermark is not visible. This is correct and proves that select filter works as expected. As I understand this is how ffmpeg works : it leaves last frame of the shortest video visible.

  How can I force ffmpeg to discard show watermark after N seconds ?

• ffmpeg doesn't show download progress [closed]

  10 mars 2013, par Siddharth Ramakrishnan

  I run a mp3 site which converts video to mp3 from youtube and i have working script which works well on my another server. Recently changed my server and found that it is not showing download progress when downloading song from youtube instead it shows white page untill in downloads and then display the conversion progress. Confirmed with my site coder and he said that it is not php error. Error with ur server.

  You can check it here http://mp3world.mobi/details.php?code=jVl5s1e0Oo4&name=Chester+See+-+God+Damn+You%27re+Beautiful+%28Official+Music+Video%29

  I am unable to figure it out. Can anyone help me in this.