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Improve some video encoding scripts, making use of the GPU again

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Michael Campagnaro
2025-08-16 16:22:47 -04:00
parent 240d38eea0
commit 121d451982
11 changed files with 366 additions and 69 deletions
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37
dotfiles/bin/join-video
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@@ -1,6 +1,7 @@
#!/usr/bin/env bash
# Re-encodes the video to get a more accurate timeline. If you want fast video joining at the expense of accuracy then use join-video-fast.
# Re-encodes the video to get a more accurate timeline. Same settings as trim-video-vbr.
# If you want fast video joining at the expense of accuracy then use join-video-fast.
if which tput >/dev/null 2>&1; then
ncolors=$(tput colors)
@@ -26,18 +27,40 @@ else
fi
filename=$(basename -- "$1")
output_name="$2"
output="$2"
target_crf="$3"
max_bitrate_mb="$4"
if [[ $filename == "" || $output_name == "" ]]; then
printf "${BOLD}${RED}Usage: create a text file that lists the input video paths on separate lines using the format: file '/path/to/video'. Then call:\n\n$0 <list name> <output name>${NORMAL}\n"
default_crf="20"
default_max_bitrate="6"
if [[ $filename == "" || $output == "" ]]; then
printf "${BOLD}${RED}Usage: create a text file that lists the input video paths on separate lines using the format: file '/path/to/video'. Then call:\n\njoin-video <list filename> <output name> <optional: crf (quality, w/ lower = more compression) - defaults to $default_crf, use 0 for no value> <optional: max bitrate in MB - defaults to ${default_max_bitrate}M><${NORMAL}\n"
exit 1
fi
output="${output_name}.mp4"
extension="${output##*.}"
if [[ $extension == $output ]]; then
printf "${BOLD}${RED}output arg should have an extension!\n\nUsage: join-video <list filename> <output name> <optional: crf (quality, w/ lower = more compression) - defaults to $default_crf, use 0 for no value> <optional: max bitrate in MB - defaults to ${default_max_bitrate}M><${NORMAL}\n"
exit 1
fi
printf "\n${YELLOW}${BOLD}Joining contents of '$filename'| output: $output${NORMAL}\n"
if [[ $target_crf == "" || $target_crf == "0" ]] then
target_crf=$default_crf
fi
ffmpeg -y -stats -loglevel level+error -f concat -safe 0 -accurate_seek -i "$filename.$extension" -c:v libx264 -c:a copy "$output"
if [[ $max_bitrate_mb == "" ]] then
max_bitrate_mb=$default_max_bitrate
fi
# bufsize is typically double the maxrate
bufsize=$((max_bitrate_mb * 2))
bufsize="${bufsize}M"
max_bitrate="${max_bitrate_mb}M"
printf "\n${YELLOW}${BOLD}Joining contents of '$filename' | output: $output | crf: $target_crf | max rate: $max_bitrate | buffer size: $bufsize ${NORMAL}\n"
time ffmpeg -y -stats -loglevel level+error -hwaccel cuda -hwaccel_output_format cuda -f concat -safe 0 -accurate_seek -i "$filename" -c:v h264_nvenc -profile:v high -preset 3 -rc:v vbr -cq:v $target_crf -maxrate:v $max_bitrate -bufsize:v $bufsize -c:a copy -movflags +faststart "$output"
printf "\n${GREEN}${BOLD}Finished joining${NORMAL}\n\n"