Docker postprocessing script

[aTF6i]

OK, yes so it was a combination of trying different folders. (it isn't /app/data/scripts (there is a file that says it is)), case sensitivity, script errors, cancelling early etc

For future use:

The folder to use is /config/scripts/
As stated above, cancelling a recording triggers PostCancel.sh. (You will want this one for testing) (NOTE CASE ON FILE - ALSO CHMOD +X)
Completed recordings trigger PostProcessing.sh (NOTE CASE ON FILE - ALSO CHMOD +X)

Here is my script to process differently based on resolution

Code:

#!/bin/bash

RECORDING_PATH="$1"
OUTPUT_PATH="$(dirname "$RECORDING_PATH")"

LOG()
{
    logLoc=/config/scripts/script.log
    echo "$(date '+%d-%m-%Y %H:%M:%S') - $1" >> $logLoc
}

LOG "Post-processing started for file: $RECORDING_PATH"

# Get video resolution width
WIDTH=$(ffprobe -v error -select_streams v:0 -show_entries stream=width -of csv=p=0 "$RECORDING_PATH" | head -n 1)
LOG "Resolution width: $WIDTH"

# Define output file path
OUTPUT_FILE="$OUTPUT_PATH/$(basename "${RECORDING_PATH%.*}").mkv"
LOG "OUTPUT FILE: $OUTPUT_FILE"

# Remove commercials
comskip "$RECORDING_PATH"

# Check resolution width and apply different processing
if [[ "$WIDTH" -eq 1920 ]]; then
    LOG "Processing HD video"
    ffmpeg -i "$RECORDING_PATH" -c:v libx264 -preset veryfast -crf 26 -c:a copy "$OUTPUT_FILE"
elif [[ "$WIDTH" -eq 1280 ]]; then
    LOG "Processing 720p video"
    ffmpeg -i "$RECORDING_PATH" -c:v libx264 -preset fast -crf 25 -c:a copy "$OUTPUT_FILE"
else
    LOG "Processing SD video"
    ffmpeg -i "$RECORDING_PATH" -c:v libx264 -preset medium -crf 24 -c:a copy "$OUTPUT_FILE"
fi

# Check if transcoding was successful
if [[ $? -eq 0 && -f "$OUTPUT_FILE" ]]; then
    LOG "Transcoding successful, removing original file"
    rm "$RECORDING_PATH"
else
    LOG "Transcoding failed, keeping original file"
fi

# Send notification
LOG "Recording processed: $(basename "$RECORDING_PATH")"

I have yet to test comskip - Any input appreciated on that
I will monitor transcode times/quality and adjust as needed

Your input is apprecated as always, Martin

[aTF6i]

...

[aTF6i]

updated script if anyone wants it

It seems to be working well

Code:

#!/bin/bash

RECORDING_PATH="$1"
OUTPUT_PATH="$(dirname "$RECORDING_PATH")"

LOG()
{
    logLoc=/config/scripts/script.log
    echo "$(date '+%d-%m-%Y %H:%M:%S') - $1"
    echo "$(date '+%d-%m-%Y %H:%M:%S') - $1" >> $logLoc
}

# Function to convert duration to seconds
duration_to_seconds() {
    local DURATION=$1
    local HOURS=$(echo $DURATION | cut -d':' -f1)
    local MINUTES=$(echo $DURATION | cut -d':' -f2)
    local SECONDS=$(echo $DURATION | cut -d':' -f3 | cut -d'.' -f1)
    local MILLISECONDS=$(echo $DURATION | cut -d':' -f3 | cut -d'.' -f2)
    echo $((10#$HOURS * 3600 + 10#$MINUTES * 60 + 10#$SECONDS))
}

# Function to calculate absolute difference
abs_diff() {
    local DIFF=$(( $1 - $2 ))
    if (( DIFF < 0 )); then
        DIFF=$(( -DIFF ))
    fi
    echo $DIFF
}


LOG "Post-processing started for file: $RECORDING_PATH"

# Get video resolution width
WIDTH=$(ffprobe -v error -select_streams v:0 -show_entries stream=width -of csv=p=0 "$RECORDING_PATH" | head -n 1)
LOG "Resolution width: $WIDTH"

# Define output file path
OUTPUT_FILE="$OUTPUT_PATH/$(basename "${RECORDING_PATH%.*}").mkv"
LOG "OUTPUT FILE: $OUTPUT_FILE"

START_TIME=$(date +%s)
# Check resolution width and apply different processing
if [[ "$WIDTH" -eq 1920 ]]; then
    LOG "Processing HD video"
    ffmpeg -i "$RECORDING_PATH" -c:v libx264 -preset veryfast -crf 26 -c:a copy -sn -y "$OUTPUT_FILE"
elif [[ "$WIDTH" -eq 1280 ]]; then
    LOG "Processing 720p video"
    ffmpeg -i "$RECORDING_PATH" -c:v libx264 -preset fast -crf 25 -c:a copy -sn -y "$OUTPUT_FILE"
else
    LOG "Processing SD video"
    ffmpeg -i "$RECORDING_PATH" -c:v libx264 -preset medium -crf 24 -c:a copy -sn -y "$OUTPUT_FILE"
fi
END_TIME=$(date +%s)

# Calculate and log the transcode time
TRANSCODE_TIME=$((END_TIME - START_TIME))
LOG "Transcoding time: $TRANSCODE_TIME seconds"

# Check if transcoding was successful
if [[ -f "$OUTPUT_FILE" ]]; then
    LOG "Transcoded file present"    
else
    LOG "Transcoding - File check failed,  keeping original file"
    exit
fi

# Verify the duration of the input and output files
INPUT_DURATION=$(ffmpeg -i "$RECORDING_PATH" 2>&1 | grep "Duration" | awk '{print $2}' | tr -d ,)
OUTPUT_DURATION=$(ffmpeg -i "$OUTPUT_FILE" 2>&1 | grep "Duration" | awk '{print $2}' | tr -d ,)

INPUT_SECONDS=$(duration_to_seconds $INPUT_DURATION)
OUTPUT_SECONDS=$(duration_to_seconds $OUTPUT_DURATION)

TOLERANCE=15 # Allowable difference in seconds
DIFF=$(abs_diff $INPUT_SECONDS $OUTPUT_SECONDS)

LOG "Input duration (seconds): $INPUT_SECONDS"
LOG "Transcode duration (seconds): $OUTPUT_SECONDS"
LOG "Duration difference (seconds): $DIFF"

if (( DIFF <= TOLERANCE )); then
    LOG "Transcoding successful, removing original file"
    rm "$RECORDING_PATH"
    
   #Remove commercials
    LOG "Processing comskip..."
    comskip --ini=/config/scripts/comskip.ini "$OUTPUT_FILE"

    # Send notification
    LOG "Recording processed: $(basename "$RECORDING_PATH")"
else
    LOG "Transcoding - Duration check failed, keeping original file"
    exit
fi