Video Metadata Parser

This script (video_metadata_parser.sh) uses ExifTool to parse dates, times and titles from a directory of video files on the desktop. Info is saved on the desktop into a dated text file named something like VideoInfo-2017-07-25.txt:

find -E "Desktop/Videos" -type f -iregex ".*\.(M4V|MOV)$" |\
  while read full_video_filepath
  do

    # Break up the full audio filepath stuff into different directory and filename components.
    video_dirname=$(dirname "${full_video_filepath}");
    video_basename=$(basename "${full_video_filepath}");
    video_filename="${video_basename%.*}";
    video_extension="${video_basename##*.}";

    # Get the video metadata.
    video_date=$(exiftool -s -s -s -CreationDate "${full_video_filepath}");
    video_title=$(exiftool -s -s -s -Title "${full_video_filepath}");

    # Reformat the file creation date to be Flickr friendly.
    if [ ! -z "${video_date}" ]; then
      video_date_formatted=$(date -jf"%Y:%m:%d %k:%M:%S" "${video_date%-*}" +"%m/%d/%Y %k:%M:%S");
    else
      video_date_formatted="";
    fi

    # Reformat the file creation date to be Flickr friendly.
    echo "${video_filename} | ${video_date_formatted} | ${video_title}" >> "Desktop/VideoInfo-$(date +%Y-%m-%d).txt";

  done

Extract MP4 Videos Out of an MKV File

Simple script traverse a directory filled with MKV files and extract the MP4 inside without transcoding:

find -E 'Desktop/Movies' -type f -iregex '.*\.(MKV)$' |\
  while read FULL_PATH
  do
    PATH_SANS_EXTENSION="${FULL_PATH%.*}"
    ffmpeg -i "${FULL_PATH}" -codec copy "${PATH_SANS_EXTENSION}".mp4
  done

Extract ASS Subtitles Out of an MKV File

Simple script traverse a directory filled with MKV files and extract the ASS formatted subitles out of them:

find -E 'Desktop/Movies' -type f -iregex '.*\.(MKV)$' |\
  while read FULL_PATH
  do
    PATH_SANS_EXTENSION="${FULL_PATH%.*}"
    ffmpeg -y -v quiet -i "${FULL_PATH}" -codec:s ass -c copy "${PATH_SANS_EXTENSION}".ass & task_pid=(`jobs -l | awk '{print $2}'`);
    wait ${task_pid};
  done

Add SRT Subtitles to MP4 Files

Simple script traverse a directory filled with MKV files and extract the ASS formatted subitles out of them:

find -E 'Desktop/Movies' -type f -iregex '.*\.(MP4)$' |\
  while read FULL_PATH
  do
    PATH_SANS_EXTENSION="${FULL_PATH%.*}"
    ffmpeg -y -v quiet -i "${FULL_PATH}" -i "${PATH_SANS_EXTENSION}".srt -c:v copy -c:a copy -c:s mov_text -metadata:s:s:0 language=eng "${PATH_SANS_EXTENSION}".srt.mp4 & task_pid=(`jobs -l | awk '{print $2}'`);
    wait ${task_pid};
  done    

Batch Convert MOV and DV files to an x265 MP4

Simple script traverse a directory filled with MOV and/or DV files and convert the contents to an x265 MP4 at a height of 480 pixels:

find -E 'Desktop/Movies' -type f -iregex '.*\.(DV|MOV|MKV)$' |\
  while read FULL_PATH
  do
    PATH_SANS_EXTENSION="${FULL_PATH%.*}"
    caffeinate ffmpeg -y -v quiet -i "${FULL_PATH}" -map_metadata -1 -vf scale=-2:480 -c:v libx265 -x265-params log-level=error -crf 20 -c:a aac -b:a 128k -ac 2 -vol 384 -tag:v hvc1 -sn "${PATH_SANS_EXTENSION}".mp4  < /dev/null;
  done

Batch Extract MP4 Video From Video Files

Simple script traverse a directory filled with DV, MOV and MKV files and extract the audio and video into a new file. Useful in cases wher Handbrake adds excessive duplicate frames; FFmpeg seems to be smart enought drop them:

find -E 'Desktop/Movies' -type f -iregex '.*\.(DV|MKV|MOV|MP4)$' |\
  while read FULL_PATH
  do
    PATH_SANS_EXTENSION="${FULL_PATH%.*}"
    caffeinate ffmpeg -y -v quiet -i "${FULL_PATH}" -map_metadata -1 -c:v copy -c:a copy -map 0:0 -map 0:1 "${PATH_SANS_EXTENSION}"_content.mp4 < /dev/null;
  done

Strip Metadata Out of Video Files

A simple script to traverse a directory filled with MKV or MP4 files strips the metadata out of them:

find -E 'Desktop/Movies' -type f -iregex '.*\.(MKV|MP4)$' |\
    while read full_video_filepath
    do
    
        # Break up the full audio filepath stuff into different directory and filename components.
        video_dirname=$(dirname "${full_video_filepath}");
        video_basename=$(basename "${full_video_filepath}");
        video_filename="${video_basename%.*}";
        video_extension="${video_basename##*.}";
        
        # Run the command.
        ffmpeg -y -v quiet -i "${full_video_filepath}" -map_metadata -1 -map 0 -c:v copy -c:a copy -c:s copy "${video_dirname}"/"${video_filename}"_new."${video_extension}" & task_pid=(`jobs -l | awk '{print $2}'`);
        wait ${task_pid};
    
    done

Trim Seconds Off of the End of Video Files

A simple script to traverse a directory filled with MP4 files and trim 7 seconds (adjustable) off of the end of them:

find -E 'Desktop/Movies' -type f -iregex '.*\.(MP4)$' |\
  while read full_video_filepath
  do

    # Set the duration of the trim.
    trim_duration=7

    # Break up the full audio filepath stuff into different directory and filename components.
    video_dirname=$(dirname "${full_video_filepath}");
    video_basename=$(basename "${full_video_filepath}");
    video_filename="${video_basename%.*}";
    video_extension="${video_basename##*.}";

    # The duration of the video.
    video_duration=$(ffprobe -v error -show_entries format=duration -of csv=p=0 "${full_video_filepath}");
    video_duration_new=$(echo "$video_duration - $trim_duration" | bc);

    # echo ${full_video_filepath} - ${video_duration} - ${video_duration_new};

    # Run the command.
    ffmpeg -y -v quiet -ss 00:00:00 -i "${full_video_filepath}" -to ${video_duration_new} -c copy -copyts "${video_dirname}"/"${video_filename}"_new."${video_extension}" & task_pid=(`jobs -l | awk '{print $2}'`);
    wait ${task_pid};

  done