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17 results

MIDI.aps

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  • video.html 1.48 KiB
    <html>
    <body>
    <pre>
    
    HTML5 MP4 ffmpeg encoding
    
    codecs
       H.264: good compression, widely supported
       H.265: better compression, less widely supported
    
    ~megabytes/minute compression for Web
    
    variable bit rate 1080p MP3:
    
       ffmpeg -i input_video -vcodec libx264 -crf 25 -preset medium -vf scale=-2:1080 -acodec libmp3lame -q:a 4 -ar 48000 -ac 2 output_video.mp4
    
    fixed bit rate 1080p MP2:
    
       ffmpeg -i input_video -vcodec libx264 -b:v 1000k -vf scale=-2:1080 -acodec mp2 -b:a 256k -ar 48000 -ac 2 output_video.mp4
    
    no audio:
    
       ffmpeg -i input_video -vcodec libx264 -b:v 1000k -vf scale=-2:1080 -an output_video.mp4
    
    crop size (width:height:xoffset:yoffset):
    
       ffmpeg -i input_video -vf crop=1500:800:200:100 -vcodec libx264 -b:v 1000k -an output_video.mp4
    
    trim time (-ss start time, -t duration):
    
       ffmpeg -i input_video -vcodec libx264 -b:v 1000k -an -ss 00:00:10 -t 00:00:10 output_video.mp4
    
    mix audio and video:
    
       ffmpeg -i input_video -vcodec libx264 -b:v 1000k -vf crop=1120:876:0:100 -i input_audio -acodec mp2 -b:a 256k -ar 48000 -ac 2 -ss 00:00:20 -t 00:00:20 output_video.mp4
    
    crop, pan, composite:
    
       ffmpeg -i input_video_1 -i input_video_2 -filter_complex '[1:v]crop=175:95:930:860[cropout];[cropout]scale=350:190[scaleout];[0:v][scaleout]overlay=10:10[outv]' -map '[outv]' -vcodec libx264 -b:v 1000k -map 0:a -acodec mp2 -b:a 256k -ac 2 -t 00:00:05 output_video.mp4
    
    numbered images to video:
    
       ffmpeg -r 30 -i %04d.jpg -vcodec libx264 -b:v 1000k -vf scale=-2:1080 -an output_video.mp4