#!/usr/bin/env bash if which tput >/dev/null 2>&1; then ncolors=$(tput colors) fi if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then RED="$(tput setaf 1)" GREEN="$(tput setaf 2)" YELLOW="$(tput setaf 3)" BLUE="$(tput setaf 4)" MAGENTA="$(tput setaf 5)" CYAN="$(tput setaf 6)" BOLD="$(tput bold)" NORMAL="$(tput sgr0)" else RED="" GREEN="" YELLOW="" BLUE="" MAGENTA="" CYAN="" BOLD="" NORMAL="" fi use_gpu=0 if [[ "$#" < 3 || "$#" > 6 ]]; then printf "${BOLD}${RED}Usage: $0 \n\nIf you want to encode a range of CRF values then use -1 as the crf value.${NORMAL}\n" exit 1 fi use_crf=$1 filename=$(basename -- "$2") extension="${filename##*.}" filename="${filename%.*}" output_name="$3" if [[ "$#" > 3 ]]; then use_gpu=$4 if [[ "$#" > 4 ]]; then start_time="$5" if [[ "$#" > 5 ]]; then end_time="$6" fi fi fi if [[ $use_gpu -ne 0 && $use_gpu -ne 1 ]]; then printf "${BOLD}${RED}Invalid use_gpu value. Got $use_gpu, but expected either 0 or 1${NORMAL}\n" exit 1 fi function encode() { crf=$1 output="${output_name}.$extension" printf "\n${YELLOW}${BOLD}Encoding '$filename.$extension' | GPU: $use_gpu | CRF $crf | output: $output | start: $start_time | end: $end_time${NORMAL}\n" timing_args="" if [[ $start_time != "" ]]; then timing_args+="-ss $start_time -to $end_time" fi if [[ $use_gpu -eq 1 ]]; then # File will be slightly larger than CPU encoding, but it's much faster to transcode and doesn't max out the CPU cores. ffmpeg -y -stats -loglevel level+error $timing_args -vsync 0 -hwaccel cuda -hwaccel_output_format cuda -i "$filename.$extension" -c:a copy -c:v h264_nvenc -profile:v high -rc:v vbr_hq -cq:v $crf -b:v 5M -maxrate 5M -max_muxing_queue_size 9999 "$output" else ffmpeg -y -stats -loglevel level+error $timing_args -i "$filename.$extension" -c:v libx264 -crf $crf -preset veryfast -profile:v high -level 3.0 -strict -2 "$output" fi printf "\n${GREEN}${BOLD}Finished encoding '$filename.$extension' (CRF $crf) | output name '$output'${NORMAL}\n\n" } if [[ $use_crf -ne -1 ]]; then encode $use_crf else printf "\n${YELLOW}${BOLD}Encoding using a range of CRF values.${NORMAL}\n" # Bigger crf values == bigger compression. for crf in {25..28} do encode $crf done fi