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• Problem when adding background music to video without sound

  27 avril 2020, par Nguyễn Trọng

  I am trying to cut a piece of background music and loop them into a video and change the speed of the video with the command below.

  



   String[] cmd = {"-y", "-i", input, "-i", shortsound,
            "-filter_complex",
            "[0:v]trim=0:120,setpts=1/2*(PTS-STARTPTS)[v1]," +
                    "[0:v]trim=120:240,setpts=1/2*(PTS-STARTPTS)[v2];" +
                    "[1:a]atrim=0:6,asetpts=PTS-STARTPTS," +
                    "asetrate=44100,aloop=-1:2e+09," +
                    "aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo,volume=1.0[bg];" +
                    "[0:a]atrim=0:120,asetpts=PTS-STARTPTS,atempo=2.0" +
                    ",aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo[a1]," +
                    "[0:a]atrim=120:240,asetpts=PTS-STARTPTS,atempo=2.0," +
                    "aformat=sample_fmts=fltp:sample_rates=44100:channel_layouts=stereo[a2];" +
                    "[v1][a1][v2][a2]concat=n=2:v=1:a=1[video][audio];[audio]volume=0.5[avolume];" +
                    "[avolume][bg]amerge=2,pan=stereo|c0code>

  



  Everything was fine until I tried with a video without sound, it didn't work.
How when input is a video without sound ?

  


• Use ffmpeg to create a music video with the cover on a black background

  21 septembre 2020, par user6329530

  I am trying to use this tutorial to create youtube videos with ffmpeg
https://trac.ffmpeg.org/wiki/Encode/YouTube

  


  When using this example, I get a video that works however the background is white

  


  ffmpeg -loop 1 -framerate 2 -i albumcover.png -i audio.wav -c:v libx264 -preset medium -tune stillimage -crf 18 -c:a copy -shortest -pix_fmt yuv420p output.mkv


  


  I tried to add a color filter but that makes the whole video output black :

  


  ffmpeg -loop 1 -framerate 2 -i albumcover.png -filter_complex "color=s=1920x1080:c=black" -i audio.wav -c:v libx264 -preset medium -tune stillimage -crf 18 -c:a copy -shortest -pix_fmt yuv420p output.mkv


  


  I find it very difficult to find something about this on the internet as most ask for just a black video or a transparent background for a gif ect.

  


  So how do I get the albumcover.png on a black background ?

  


  EDIT : I just realized that the video format is of course the image format (square) and therefore it's white on youtube. The question therefore is now how do I create a black background 16:9 and put the albumcover centered on it...

  


• Video with music taking long time

  1er octobre 2020, par Konduri Sai Aditya

  Hi I am rendering video with filters and adding audio at the end. But while running it is taking a long time and rendering continuously. Can anyone help me where I am wrong ? below is the command

  


   ffmpeg -i test.png -i test.mp4 -i test.mp3  -y -filter_complex "[1:v]scale=1422:800[scale1],[scale1]rotate=0:c=black@0:ow=rotw(0):oh=roth(0)[rotate0],[0:v][rotate0]overlay=258.04:107.71[mediaoverlayout0],color=black@0:451x137[c1],[c1]setsar=1,drawtext=fontfile='/Windows/fonts/Peddana-Regular.ttf':text='ADITYA':fontsize=121.199:fontcolor=#1e8bc3:line_spacing=16.91,rotate=0:ow=rotw(0):oh=roth(0):c=black@0[rottext1],[mediaoverlayout0][rottext1]overlay=x=544.63:y=263.076[out]" -vcodec libx264 -map "[out]" -map 2:a -preset veryfast -c:a copy -pix_fmt yuv420p op.mp4