DVR post processing script for Jellyfin

post-process.sh

#!/usr/bin/env bash

set -o errexit
set -o pipefail
set -o nounset
# set -o xtrace

PWD="$(pwd)"

die () {
	echo >&2 "$@"
	cd "${PWD}"
	exit 1
}

# Colors
GREEN='\033[0;32m'
NC='\033[0m' # No Color

__path="${1:-}"

# verify a path was provided
[ -n "$__path" ] || die "path is required"
# verify the path exists
[ -f "$__path" ] || die "path ($__path) is not a file"

__dir="$(dirname "${__path}")"
__file="$(basename "${__path}")"
__base="$(basename "${__path}" ".ts")"

# Debbuging path variables
# printf "${GREEN}path:${NC} ${__path}\ndir: ${__dir}\nbase: ${__base}\n"

# Try to find local version of ffmpeg, defaults to the path used in docker if not found
__ffmpeg="$(which ffmpeg || echo '/usr/lib/jellyfin-ffmpeg/ffmpeg')"

# Change to the directory containing the recording
cd "${__dir}"

# Extract closed captions to external SRT file
printf "[post-process.sh] %bExtracting subtitles...%b\n" "$GREEN" "$NC"
$__ffmpeg -f lavfi -i movie="${__file}[out+subcc]" -map 0:1 "${__base}.srt"

# Transcode to mp4, crf parameter can be adjusted to change output quality
printf "[post-process.sh] %bTranscoding file..%b\n" "$GREEN" "$NC"
$__ffmpeg -i "${__file}" -vcodec libx264 -vf yadif=parity=auto -crf 20 -preset veryslow "${__base}.mp4"

# Remove the original recording file
printf "[post-process.sh] %bRemoving originial file...%b\n" "$GREEN" "$NC"
rm "${__file}"

# Return to the starting directory
cd "${PWD}"

Any way to get the original file removed after the conversion is done.

@MapGuy11 👍 I have updated the script to remove the original file and added some comments about what each step is doing.

Wow Thank you!

i got a windows jellyfin server, would this work on that? I cant seem to get it working

No , this script is linux based. If you are stuck on Windows use Windows Subsystem for Linux to install Jellyfin on Linux with Windows OS Install.

I whipped together a very quick and dirty windows version for myself, figured I'd link it here for people that stumble across this (like I did) but need it in Windows.

Windows DVR PostProcess Batch Script for Jellyfin

Any plans to add comskip?

It’s something that I have considered, but I haven’t had a chance to try it yet.

Found this, might help debug the character ecaping issue

http://underpop.online.fr/f/ffmpeg/help/quoting-and-escaping.htm.gz

The function av_get_token defined in 'libavutil/avstring.h' can be used to parse a token quoted or escaped according to the rules defined above.

The tool 'tools/ffescape' in the FFmpeg source tree can be used to automatically quote or escape a string in a script.

I found this awkward quoting process (inspiration from ffmpeg#5896) helped with normal escaping, plus the extra touches the filter parameter requires for single ticks (') and colons (:) in filenames for the subtitle extraction command:

$__ffmpeg -f lavfi -i movie="$(printf %q "${__file//\'/\\\'}" | sed "s#\:#\\\\\\\\:#")[out+subcc]" -map 0:1 "${__base}.srt"

I'm also poking at muxing to mkv instead of mp4, and detecting whether the incoming TS needs transcoding at all, or just remuxing:

+# Decide whether we need to transcode video or audio
+VCODEC=$(ffprobe -loglevel error -select_streams v -show_entries stream=codec_name -of default=nw=1:nk=1 "${__file}" | sort -u)
+ACODEC=$(ffprobe -loglevel error -select_streams a -show_entries stream=codec_name -of default=nw=1:nk=1 "${__file}" | sort -u)
+
+ENCODE_ARGS=""
+if [[ "$VCODEC" != "h264" ]]; then
+       ENCODE_ARGS="$ENCODE_ARGS -c:v libx264"
+else
+       ENCODE_ARGS="$ENCODE_ARGS -c:v copy"
+fi
+if [[ "$ACODEC" != "ac3" ]]; then
+       ENCODE_ARGS="$ENCODE_ARGS -c:a aac"
+else
+       ENCODE_ARGS="$ENCODE_ARGS -c:a copy"
+fi
 # Transcode to mp4, crf parameter can be adjusted to change output quality
 printf "[post-process.sh] %bTranscoding file..%b\n" "$GREEN" "$NC"
-$__ffmpeg -i "${__file}" -vcodec libx264 -vf yadif=parity=auto -crf 20 -preset veryslow "${__base}.mp4"
+$__ffmpeg -i "${__file}" -map 0 $ENCODE_ARGS "${__base}.mkv"

However, ffprobe cannot be found @bwarden

could be totally missing something, but how do you have this set in DVR settings? I keep getting an exit code of 1 in JF logs: set up like

Post-processing application:
/bin/bash
Post-processor command line arguments:
/Scripts/livetv_postprocess.sh {path}

Your script is awesome! Could you help me with the encode syntax to enable intel quick sync? I am unfortunately running Jellyfin on a lower powered CPU and QSV helps a ton. Thanks!!

It’s something that I have considered, but I haven’t had a chance to try it yet.

Had a chance to try it out yet?