Vicfred/ffmpeg.md

## ffmpeg.md

      
    Raw
  

              ffmpeg.md
            
          
    metadata
ffprobe input.mp4

(no export)
INPUT_VIDEO=input.mp4

default crf is 28 (lower = better quality), default preset is medium, preserve metadata, re-encode audio
HALF THE SIZE OF DEFAULT ANDROID ENCODING
ffmpeg -i $INPUT_VIDEO -c:v libx265 -map_metadata 0 -movflags use_metadata_tags -c:a aac -b:a 128k output.mp4

crf 26 (lower = better quality), slow preset, preserve metadata, re-encode audio
ffmpeg -i $INPUT_VIDEO -c:v libx265 -map_metadata 0 -movflags use_metadata_tags -crf 26 -preset slow -c:a aac -b:a 128k output.mp4

downsize to half
ffmpeg -i $INPUT_VIDEO -c:v libx265 -vf scale="iw/2:ih/2" -map_metadata 0 -movflags use_metadata_tags -c:a aac -b:a 128k output.mp4

remove audio
ffmpeg -i $INPUT_VIDEO -c:v libx265 -map_metadata 0 -movflags use_metadata_tags -an output.mp4

batch.sh
#!/bin/bash
for video_file in *.mp4; do
  ffmpeg -i $video_file -c:v libx265 -map_metadata 0 -movflags use_metadata_tags -c:a aac -b:a 128k compressed/$video_file
done