pickstreams
===========

a frontend to ffprobe that:

1. produces less-verbose output with only the fields you need
2. optionally filters by audio and subtitle languages

Usage:

pickstreams.py <file> <audio_lang> <sub_lang> <hi_preferred>

If audio_lang is left empty, all audio strrams are shown. If sub_lang is
left empty, all subtitle streams are shown.  If hi_preferred is set to "hi",
hearing-impaired subtitle tracks will be preferred; if left empty, regular
subtitle tracks will be preferred.