rg3/youtube-dl — pull request #1012 by thesues (2013-07-09 02:05:38+00:00)
Title: Add flv file merger

some website,such as www.youku.com, usually splits large video into several parts. So we need to merge all the parts after finishing the download.

add new option "-m"/"--merge-video" to merge flv/f4v videos.