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Sur d’autres sites (11266)

  • how to add overlay at the end of video without knowing time duration of video file - ffmpeg

    13 décembre 2019, par Luka mikic

    I have a bunch of video files to which I add animated overlay at the beginning of video, but I would like to add it again at the end of it t-13 seconds. This is my bash script :

    do
    
   ffmpeg -i "${f}" -i /app/logo/lower.mov -i /app/logo/logo.png -filter_complex \
    
      "[0:v]scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:x=(1280-iw)/2:y=(720-ih)/2:color=black[bg0]; \
    
      [bg0][1:v]overlay=10:10[bg1]; \
    
      [bg1][2:v]overlay=10:10,drawtext=fontfile=/app/logo/Courier Prime.ttf:text=$(basename "${f}" | cut -f 1 -d '.'): \
    
      fontcolor=white:fontsize=25:x=256:y=h-th-130:alpha=1:enable='between(t,2,15)'" \
    
      -c:v libx264 -crf 21 -preset ultrafast "${f%.*}.mp4" -y
    
done

    Is there any way to do this ? I know how to extract the duration with FFProbe, but do not know how to add duration dynamically to a variable and then apply it to code I have.

  • Using ffmpeg to cut up video into smaller video with exactly 30 frames

    30 mars 2018, par MonsieurBeilto

    I need to cut a video with >300 frames into ten videos, where the first video comprises the first 30 frames, the second video comprises frames from 31 to 60 and so on.

  • ffmpeg encoded video has video/audio sync delay when uploading to Facebook & WhatsApp

    13 décembre 2019, par royherma
        "fluent-ffmpeg": "^2.1.2",
    
    "ffmpeg": "^0.0.4",
    
    node : 8

    Code to reproduce

    let command = ffmpeg()
    
        .input(tempFilePath)
    
        .input(watermarkFilePath)
    
        .complexFilter([
    
            "[0:v][1:v]overlay=W-w-20:H-h-20"
    
        ])
    
        .videoBitrate(2500)
    
        .videoCodec('libx264')
    
        .audioCodec('aac')
    
        .format('mp4')
    
        .output(targetTempFilePath)

    When applying the ffmpeg encoding command on the attached video, it plays fine on a local device - the issue however is when uploading to Facebook/WhatsApp the audio/video becomes out of sync

    Any ideas on what i need to change in terms of the video/audio settings so that the audio + video are in sync, even when uploaded to the various social networks ?

    Here’s a link to the 3 video files (original, post ffmpeg, post whatsapp upload that includes delay) if you want to get a better idea !

    https://wetransfer.com/downloads/445dfaf0f323a73c56201b818dc0267b20191213052112/24e635

    Thank you and appreciate any help !!

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