README

subtitlegen creates SRTs from CSVs.

SRT is perhaps the most basic of all subtitle formats. (http://www.matroska.org/technical/specs/subtitles/srt.html)

1. Create the subtitles from csv via subtitlegen.py:

    $ python subtitlegen.py --long sample.csv > sample.srt
   

   The expected CSV format is as follows (note that the time format is MM:SS:Milliseconds, although full milliseconds would need three digits):

    $ cat sample.csv
    0,34:39:00
    1,34:52:00
    2,35:01:00
    3,35:55:00
    ...
   

   The resulting srt looks like (the time format here is HH:MM:SS,milliseconds):

    $ cat sample.srt
    0
    00:34:39,000 --> 00:34:51,999
    ~ 0 m [00:34:39,000 | 13.0]
   
    1
    00:34:52,000 --> 00:35:00,999
    ~ 1 m [00:34:52,000 | 9.0]
   
    2
    00:35:01,000 --> 00:35:54,999
    ~ 2 m [00:35:01,000 | 54.0]
   
    3
    00:35:55,000 --> 00:36:11,999
    ~ 3 m [00:35:55,000 | 17.0]
   
    ...
   

2. Optional. Downcase all filenames (MOV to mov); (might only be a problem on HFS+):

    $ find 1-20-S-2-38-S -name "*.MOV" \
        -exec sh -c 'mv "$1" "${1%.MOV}.mov"' _ {} \;
   

3. Concatenate videos via ffmpeg and MPEG transport stream:

    $ ffmpeg -i 1-20-S-2-38-S/VIDE0001.mov -c copy -bsf h264_mp4toannexb a.ts
    $ ffmpeg -i 1-20-S-2-38-S/VIDE0002.mov -c copy -bsf h264_mp4toannexb b.ts
    $ ffmpeg -i "concat:a.ts|b.ts" -c copy -bsf aac_adtstoasc ab.mp4
   

4. Test the subtitles with mplayer:

    $ mplayer -sub sample.srt ab.mp4
   

5. Create a new file that has a dedicated subtitle track with MP4Box:

    $ MP4Box -add ab.mp4#audio -add ab.mp4#video \
        -add test.srt:hdlr=sbtl:lang=en:group=2:layer=-1 -new output.m4v
   

As a picture

Thanks vak for makefile2dot.

Failed attempts

Just some things that seemed to work, but don't.

$ # mencoder -oac copy -ovc copy \
    1-20-S-2-38-S/VIDE0001.mov 1-20-S-2-38-S/VIDE0002.mov \
    -o 1-20-S-2-38-S.mov

$ # mencoder -oac copy -ovc copy \
    -of avi -o output.avi \
    1-20-S-2-38-S/VIDE0001.mov 1-20-S-2-38-S/VIDE0002.mov

$ # MP4Box -cat 1-20-S-2-38-S/VIDE0001.mov -cat 1-20-S-2-38-S/VIDE0002.mov \
    output.m4v