ffmpeg video convert from mts format

1_mts_to_mp4.sh

#!/bin/sh

# for Macbook (MacOS)
# prereq.:
# - custom ffmpeg installation:
#   brew tap justinmayer/tap
#   brew install justinmayer/tap/ffmpeg --with-fdk-aac --with-libvidstab --with-webp
# - brew install exiftool

function mts_to_mp4_h265_cpu() {
  mts_file="$1"
  vbitrate="${2:-15000k}"
  preset="${3:-medium}" # ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow
  abitrate="${4:-256k}"
  mp4_file="${mts_file%.*}.mp4"
  ffmpeg -hide_banner -y -i "$mts_file" -vf yadif -c:v libx265 -b:v "$vbitrate" -preset "$preset" -x265-params pass=1 -an -f mp4 /dev/null
  ffmpeg -hide_banner    -i "$mts_file" -vf yadif -c:v libx265 -b:v "$vbitrate" -preset "$preset" -x265-params pass=2 -tag:v hvc1 -c:a aac -b:a "$abitrate" "$mp4_file"
  exiftool -overwrite_original -TagsFromFile "$mts_file" "$mp4_file"
  touch -r "$mts_file" "$mp4_file"
}

function mts_to_mp4_h265_gpu() {
  mts_file="$1"
  vbitrate="${2:-15000k}"
  abitrate="${3:-256k}"
  mp4_file="${mts_file%.*}.mp4"
  ffmpeg -hide_banner -y -i "$mts_file" -vf yadif -c:v hevc_videotoolbox -b:v "$vbitrate" -f mp4 -tag:v hvc1 -c:a aac -b:a "$abitrate" "$mp4_file"
  exiftool -overwrite_original -TagsFromFile "$mts_file" "$mp4_file"
  touch -r "$mts_file" "$mp4_file"
}

function mts_to_mp4_h265_gpu_vidstab() {
  mts_file="$1"
  bitrate="${2:-15000k}"
  shakiness="${3:-5}"
  smoothing="${4:-10}"
  zoom="${5:-0}"
  mp4_file="${mts_file%.*}.mp4"
  stab_stat="transforms.trf"
  detect_opts="shakiness=${shakiness}:result='${stab_stat}'"
  transform_opts="smoothing=${smoothing}:interpol=bicubic:zoom=${zoom}:input='${stab_stat}'"
  ffmpeg -hide_banner    -i "$mts_file" -vf "vidstabdetect=${detect_opts}" -f null -
  ffmpeg -hide_banner -y -i "$mts_file" -vf "yadif, vidstabtransform=${transform_opts}, unsharp=5:5:0.8:3:3:0.4" \
         -c:v hevc_videotoolbox -b:v "$bitrate" -f mp4 -tag:v hvc1 -c:a aac -b:a 256k "$mp4_file"
  exiftool -overwrite_original -TagsFromFile "$mts_file" "$mp4_file"
  touch -r "$mts_file" "$mp4_file"
  rm "$stab_stat"
}

function convert_all() {
  # Convert all MTS files in current directory
  where="${1:-gpu}"
  for mts_file in *.MTS; do
    mts_to_mp4_h265_${where} "$mts_file"
  done
  rm -f x265_2pass.* || :
}

function for_tg_mp4_720_gpu() {
  ifile="$1"
  bitrate="${2:-3000k}"
  ofile="${ifile%.*}_720.mp4"
  ffmpeg -hide_banner -y -i "$ifile" -vf scale=-1:720 -c:v hevc_videotoolbox -b:v "$bitrate" -f mp4 -tag:v hvc1 -c:a aac -b:a 128k "$ofile"
  touch -r "$ifile" "$ofile"
}

2_mts_to_mp4.ps1

$ffmpeg = "C:\Program Files\ffmpeg\bin\ffmpeg.exe"
$exiftool = "C:\Program Files\exiftool.exe"

. $exiftool -d '%Y%m%d_%H%M%S' '-Filename<%f_${DateTimeOriginal}.%le' -ext mts .

Get-ChildItem ".\*.MTS" | % {
  $InName = $_.Name
  $OutName = ([io.fileinfo]$InName).basename + ".mp4"
  . $ffmpeg -hide_banner -y -i $InName -vf yadif -c:v libx265 -b:v 1500K -preset medium -x265-params pass=1 -an -f mp4 NUL
  . $ffmpeg -hide_banner    -i $InName -vf yadif -c:v libx265 -b:v 1500K -preset medium -x265-params pass=2 -tag:v hvc1 -c:a aac -b:a 256k $OutName
  . $exiftool -overwrite_original -TagsFromFile $InName $OutName
  $OutMeta = Get-Item $OutName
  $OutMeta.CreationTime = $_.CreationTime
  $OutMeta.LastWriteTime = $_.LastWriteTime
  $OutMeta.LastAccessTime = $_.LastAccessTime
}
Remove-Item ".\ffmpeg2pass*"