Scale, re-encode and add hardsubs to video files using ffmpeg

convert.sh

#!/bin/bash
# Args: ./convert.sh <file glob> <output folder>
# Don't forget to escape the wildcards used in the file glob.
#
# This is a bash script I wrote to convert my high-quality videos to
# lower-quality ones that can be played in my car's player. As it
# (unfortunately) doesn't support softsubs, I also have to encode hardsubs into
# the videos. The only format supported by the player is mp4, so I always convert
# to that by default.
#
# To add hardsubs and re-encode files to mp4 when they have multiple sources of
# audio / subtitles, first use the Copy command to map only the sources you want
# to another file, and then convert using scaling from it.

for filename in ${1}; do
  if [[ -f "${2}/${filename}" ]]; then
    continue
  fi
  name=$(basename "${filename}")
  name_no_extension="${name%.*}"

  # Copy
  # Change the maps to the sources you want to keep. Only one source per video, audio and subtitle.
  #ffmpeg -y -i "${filename}" -map 0:v:0 -map 0:a:1 -map 0:s:1 -c:v copy -c:a copy -c:s copy "${2}/${name_no_extension}.mkv"

  # Best quality/speed with hardsubs
  #ffmpeg -y -i "${filename}" -vf "subtitles='${filename}'" "${2}/${name_no_extension}.mp4"

  # Scaling to 720p
  #ffmpeg -y -i "${filename}" -vf 'subtitles="${filename}"' scale="-1:720" -c:v libx264 -c:a copy "${2}/${name_no_extension}.mp4"

  # Scaling to 720p + aac
  ffmpeg -y -i "${filename}" -vf "subtitles='${filename}'",scale=-1:720 -c:v libx264 -c:a aac -b:a 160k "${2}/${name_no_extension}.mp4"
done

Hi. I'm wondering how you call your benchmark function.
What are the arguments: void func(void *, size_t), void *data, size_t numBytes, int numBenchmarks

Great !
How i can do it for Bulk files ?
ex: i have 50 video and 50 subtitles ?
can i do it automatically ?
Thanks