lwc:multimedia_and_graphics:transcoding

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lwc:multimedia_and_graphics:transcoding [2021/01/06 19:54] – [ffmpeg] John Harrisonlwc:multimedia_and_graphics:transcoding [2024/02/13 19:50] (current) – John Harrison
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   * transcode a video file so it is playable through Windows Media Player (Windows) and Quicktime (MacOS): ffmpeg -i INPUT_FILE -b 1500 -ab 384k -cropleft 20 -cropright 20 OUTPUT.mpg   * transcode a video file so it is playable through Windows Media Player (Windows) and Quicktime (MacOS): ffmpeg -i INPUT_FILE -b 1500 -ab 384k -cropleft 20 -cropright 20 OUTPUT.mpg
   * find framerate: ffmpeg -i $file 2>&1 | sed -n "s/.*, \(.*\) fp.*/\1/p"   * find framerate: ffmpeg -i $file 2>&1 | sed -n "s/.*, \(.*\) fp.*/\1/p"
 +  * make video from single image (example): ''ffmpeg -loop 1 -i image.png -c:v libx264 -t 15 -pix_fmt yuv420p -vf scale=320:240 out.mp4'' ([[https://stackoverflow.com/questions/25891342/creating-a-video-from-a-single-image-for-a-specific-duration-in-ffmpeg|source]])
 +  * make video from a series of images (not necessarily numbered from 0000): ''cat *.jpeg | ffmpeg -f image2pipe -i - output.mkv'' then ''ffmpeg -i output.mkv -codec copy output.mp4'' //from [[https://stackoverflow.com/questions/22965569/convert-from-jpg-to-mp4-by-ffmpeg|this source]]// 
 +
 ==== filters ==== ==== filters ====
  
  • lwc/multimedia_and_graphics/transcoding.1609984469.txt.gz
  • Last modified: 2021/01/06 19:54
  • by John Harrison