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Danube from Passau to Vienna

Summary: Flew into Munich, took train to Passau, rented bikes in Passau, rode to Vienna, dropped off bikes, took train back to Munich, experienced Oktoberfest, and then flew home.

danube01 danube02 danube03

Video Editing

I use ffmpeg on IGEL OS (Linux) to clip / trim .mp4 files.

Script to clip / trim mp4 files

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#!/bin/bash

# MP4 Clip Extractor
# Requires: zenity, ffmpeg

set -e

########################################
# Select input MP4
########################################

INPUT=$(zenity --file-selection \
    --title="Select MP4 Video" \
    --file-filter="MP4 files | *.mp4")

[ -z "$INPUT" ] && exit 0

########################################
# Single dialog for clip settings
########################################

RESULT=$(zenity --forms \
    --title="Create MP4 Clip" \
    --text="Enter the clip settings" \
    --separator="|" \
    --width=500 \
    --add-entry="Start Time (HH:MM:SS)" \
    --add-entry="End Time (HH:MM:SS)" \
    --add-entry="Output Filename" )

[ $? -ne 0 ] && exit 0

IFS="|" read -r START END OUTFILE <<< "$RESULT"

########################################
# Validate input
########################################

if [[ -z "$START" || -z "$END" || -z "$OUTFILE" ]]; then
    zenity --error \
        --text="All fields are required."
    exit 1
fi

# Add .mp4 if needed
[[ "$OUTFILE" != *.mp4 ]] && OUTFILE="${OUTFILE}.mp4"

OUTPUT="$(dirname "$INPUT")/$OUTFILE"

########################################
# Run ffmpeg
########################################

(
    echo "10"
    echo "# Extracting video..."

    ffmpeg -y \
        -ss "$START" \
        -to "$END" \
        -i "$INPUT" \
        -c copy \
        "$OUTPUT" >/tmp/ffmpeg.log 2>&1

    echo "100"

) | zenity \
    --progress \
    --title="Creating Clip" \
    --text="Processing..." \
    --percentage=0 \
    --auto-close \
    --no-cancel

########################################
# Show result
########################################

if [[ -f "$OUTPUT" ]]; then
    zenity --info \
        --title="Complete" \
        --text="Clip successfully created:\n\n$OUTPUT"
else
    zenity --error \
        --title="Error" \
        --text="ffmpeg failed.\n\nSee /tmp/ffmpeg.log"
fi

Merge multiple mp4 files

  • Create a text file named files.txt:
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file 'part1.mp4'
file 'part2.mp4'
file 'part3.mp4'
  • Combine the files
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ffmpeg -f concat -safe 0 -i files.txt -c copy output.mp4