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Sur d’autres sites (8095)

  • Why my youtube video made with ffmpeg only shows 360P and 1080P on mobile devices but works fine on desktop ?

    1er janvier 2020, par CheeseWithMe

    I am trying to create a video from an image and sound file with ffmpeg.

    This is what I use :

    ffmpeg -y -loop 1 -r 6  -i current_image.png -i current_audio.wav -shortest -c:v libx264 -preset ultrafast -tune stillimage -pix_fmt yuv420p -c:a aac out.mp4

    But uploading this on youtube will display only in 360P and 1080P on mobile devices while on Desktop I have all the resolutions up to 1080P.

    It has the same effect with the command from FFmpeg wiki on enconding from youtube

    ffmpeg -loop 1 -framerate 2 -i input.png -i audio.m4a -c:v libx264 -preset medium -tune stillimage -crf 18 -c:a copy -shortest -pix_fmt yuv420p output.mkv

    I have no idea why is this happening, I could use some guidance.

  • Unexpected pause in video after concatenating multiple mp4 files using ffmpeg

    21 janvier 2019, par Ajit Maurya

    I am trying to concatenate more than 90 small MP4 videos for a single MP4 file.
    i got code reference from here
    , i successfully got an output.mp4 file, but i tried to play video, there is a long pause between videos, searched and got this here is the link, but failed.

    CMD CODE : ffmpeg -y -f concat -i inputs.txt -c copy output.mp4

    inputs.txt is like
    

    file video_1.mp4
    
duration 17
    
file video_2.mp4
    
duration 25
    
file video_3.mp4
    
duration 45
    
file video_4.mp4
    
duration 15
    
file video_5.mp4
    
duration 10
    
file video_6.mp4
    
duration 20
    
file video_7.mp4
    
duration 25
    
file video_8.mp4
    
duration 20
    
file video_9.mp4
    
duration 15
    
file video_10.mp4
    
duration 12

    Please help me.

  • ffmpeg unknown keyword invalid data found when processing input

    16 novembre 2020, par Adriaan

    I have a file ffmpeg_list_of_files.txt with the content

    



    file '.\Output_0\forces_vs_radii.pdf'
file '.\Output_1\forces_vs_radii.pdf'
file '.\Output_2\forces_vs_radii.pdf'
file '.\Output_3\forces_vs_radii.pdf'
file '.\Output_4\forces_vs_radii.pdf'
and so on...


    



    and then run ffmpeg -f concat -i ffmpeg_list_of_files.txt -c copy output.mkv as is stated at

    



    http://trac.ffmpeg.org/wiki/Concatenate

    



    I, unfortunately, get the error

    



    Line 1: unknown keyword ' ■f'
.\ffmpeg_list_of_files.txt: Invalid data found when processing input


    



    in Windows PowerShell in Windows 10.

    



    What am I doing wrong ?

    


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