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• Pydub dir error . dynamic file path dosent play sound but with specific file path the code works fine

  20 avril 2021, par anshul raj

  hello developers idk whats wrong with this code it works fine when i give exact file path to the music file but if i pass it in dynamic way it doesnt work . actually my code is that user give a music file name it get downloaded then with the meta id it find the file in downloads dir then play it

  


   def songplayer(self,meta):
        def playmmusic(name):
            from pydub.playback import play
            from pydub import AudioSegment
            AudioSegment.converter = "C:\\ffmpeg\\bin\\ffmpeg.exe"
            AudioSegment.ffmpeg = "C:\\ffmpeg\\bin\\ffmpeg.exe"
            AudioSegment.ffprobe = "C:\\ffmpeg\\bin\\ffprobe.exe"
            sound = AudioSegment.from_file(name)
            play(sound)

        print(colored("Currently Playing : " + meta['title'],'yellow'))
        r=meta['id']
        tt='./downloads/'+r
        playmmusic(tt)


  


• Pydub dir error . dynamic file path doesn't play sound but with specific file path the code works fine

  20 avril 2021, par anshul raj

  I don't know what's wrong with this code - it works fine when I provide an exact file path to the music file, but if I pass it in a dynamic way, it doesn't work.

  


  Actually my code is that user give a music file name it get downloaded then with the meta id it find the file in downloads dir then play it

  


   def songplayer(self,meta):
        def playmmusic(name):
            from pydub.playback import play
            from pydub import AudioSegment
            AudioSegment.converter = "C:\\ffmpeg\\bin\\ffmpeg.exe"
            AudioSegment.ffmpeg = "C:\\ffmpeg\\bin\\ffmpeg.exe"
            AudioSegment.ffprobe = "C:\\ffmpeg\\bin\\ffprobe.exe"
            sound = AudioSegment.from_file(name)
            play(sound)

        print(colored("Currently Playing : " + meta['title'],'yellow'))
        r=meta['id']
        tt='./downloads/'+r
        playmmusic(tt)


  


• Creating a smooth animation with ffmpeg filters

  30 mai 2021, par user1503606

  I am trying to add a watermark to a video using ffmpeg and have it animated from left to right in the center of the video.

  


  I have it working with the following command.

  


  ffmpeg -y -i Volkswagen.mp4 -loop 1 -i logo.png -filter_complex overlay=x='W/30*mod(t,30):enable=gt(mod(t,60),0)':y=main_h/2-overlay_h/2:shortest=1 Volkswagen_watermarked.mp4


  


  It works but the outcome looks like this.

  


  https://www.youtube.com/watch?v=M31wG2ub1Lg

  


  The video is from here : https://gist.github.com/jsturgis/3b19447b304616f18657

  


  http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/VolkswagenGTIReview.mp4

  


  As you can see its not very smooth. I am just trying to get my head around the ffmpeg filter functions this is the first time I have used them so would appreciate some advise or is this as good as it gets ?

  


  I have looked at a few other posts but cant find any that can help with this maybe there is another filter I should be using ?

  


  I can run a draw filter command like this and the animation is smoother.

  


  ffmpeg -y -i Volkswagen.mp4 -vf "drawtext=fontfile=/Montserrat-Medium.ttf:text='Text':x=200:y=h-20*t: fontsize=36:fontcolor=yellow@0.9: box=1: boxcolor=black@0.6" -c:a copy VolkswagenText.mp4


  


  But it is obviously not looping.

  


  https://www.youtube.com/watch?v=wdANCWUHaMc

  


  I dont really understand whats happening here.

  


  w*mod(t\,10):enable=gt(mod(t\,60)\,0)

w = width of text
t = time in seconds


  


  I understand if I just have this.

  


  -filter_complex "overlay=x=w*t:y=main_h/2-overlay_h/2:shortest=1"

w*t = every second the x position is incremented by the text width * time


  


  so if the text width is 100px it would be something like this.

  


  1x100 = 100;
2x100 = 200;
etc


  


  What does the mod() function do ? I cant find any help really here https://ffmpeg.org/ffmpeg-filters.html

  


  is this saying when x is greater than the width of the viewport start again ?

  


  enable=gt(mod(t\,60)\,0)


  


  Thanks