ffprobe -v error -show_format -show_streams input.mp4

ffmpeg -hide_banner -i input.mkv

Informace o video kodeku

ffprobe -v error -select_streams v -show_entries stream=codec_name,codec_type,codec_long_name,codec_tag_string -of default=noprint_wrappers=1 file.avi

#!/bin/bash -x 

fromBR=`ffprobe -v error -show_entries format=bit_rate -of default=noprint_wrappers=1:nokey=1 "$1"`
toBR=`awk "BEGIN {print $fromBR*0.60}"`
maxBR=`awk "BEGIN {print $fromBR*1.0}"`
toFILE=`echo ${1%.*}`
CRF=23


echo FROM:$fromBR
echo TO:  $toBR
echo MAX: $maxBR
echo $CRF


# TWO WAY METHOD
ffmpeg -y -i "$1" -c:v libx265 -preset medium -b:v $toBR -maxrate $maxBR -x265-params pass=1 -an -f mp4 /dev/null 
   ffmpeg -i "$1" -c:v libx265 -preset medium -b:v $toBR -maxrate $maxBR -x265-params pass=2 -c:a copy -c:s copy "$toFILE.BR$toBR.h265.MIML.mkv"


#ONE WAY CRF METHOD
#ffmpeg -i "$1" -c:v libx265 -preset slow -crf $CRF -c:a copy -c:s copy "$toFILE.CRF$CRF.h265.MIML.mkv"

ffmpeg -i ./input.mkv -map 0 -c:a copy -c:s copy -c:v libx264 output.mkv

ffmpeg -i "concat:input1.ts|input2.ts|input3.ts" -c copy output.ts

ffmpeg -i input1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i input2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc output.mp4

ffmpeg -i The.Orville.S02E01.720p.mkv   -f srt -i The.Orville.S02E01.720p.srt  -c:v copy -c:a copy -c:s srt The.Orville.S02E01.720p+sub.mkv