Sorry, I am back. Hi, I want to play MSS2 format video in Debian with VLC, but it can't. I found this : https://trac.videolan.org/vlc/ticket/750 It said the bug fixed, so i complied VLC from git, but it still can not play MSS2 video. So what should i do? Thanks! Sorry, I don't konw how to update libavcodec.