toonverter

A set of scripts to convert cartoons for my kids' old DVD player.

This old DVD player has a few limitations (that I learnt about by toying with it):

• DIVX/XVID video streams
• MP3 audio streams
• Not sure it supports 800 pixels across. 640 works well. The vertical size seems to be an integer that is a multiple of 8.
• 25fps

So what I do is usually:

• Take video in any modern format
• Convert it to 640px making sure the vertical size is a multiple of 8, trying to minimize aspect ratio changes
• Do a two-pass conversion

Using it

How to run the scripts:

./convert_all.sh substring

Converts all the files that contain substring (case-sensitive) to .avi's.

./convert_xvid.sh filename

Converts one single file to file.avi, having a size which is no more than 640px across, and the correct number of vertical pixes, as the closest multiple of 8.

Special tweaks

• How do I change the screen width? edit optsize.pl
• How do I choose a specific audio-video stream? uncomment and set the MAPS variable. How? see below.
• How do I add subtitles?

Working with multiple audio streams

If you want to choose the audio stream to be included, you first have to map which streams are present in the file using "ffmpeg -i".

Output #0, matroska, to 'output.mkv':
Stream #0:0: Video 
Stream #0:1: Audio EN
Stream #0:2: Audio IT
Stream #0:3: Subtitle EN

Say we want to keep only the video stream and the Italian audio. We would edit the line MAPS to

MAPS="-map 0:0 -map 0:2"

to tell ffmpeg to process the file 'as-if' it only contained the video stream and the IT audio stream.

See also

See also: https://wiki.archlinux.org/index.php/FFmpeg

On quality: http://stackoverflow.com/questions/25569180/ffmpeg-convert-without-loss-quality

On audio streams: http://ffmpeg.gusari.org/viewtopic.php?f=25&t=611