how to extract video and audio meta data?

How can I extract meta data from various video file formats?

• How can I extract meta data from various video file formats, especially the Resolution and the type of codec used. (But also all other stuff like author). I was not able to find a library for that.

• Answer:

  I have found MediaInfo (http://mediainfo.sourceforge.net/) which supplies dozens of technical and tag information about a video or audio file. There is a JNI wrapper for MediaInfo in http://code.google.com/p/subs4me/ http://code.google.com/p/subs4me/source/browse/trunk/Subs4me/src/net/sourceforge/filebot/mediainfo/?r=93 that I find very useful. Here are some code snippets that show how to extract some information from a media file: String fileName = "path/to/my/file"; File file = new File(fileName); MediaInfo info = new MediaInfo(); info.open(file); String format = info.get(MediaInfo.StreamKind.Video, i, "Format", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name); int bitRate = info.get(MediaInfo.StreamKind.Video, i, "BitRate", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name); float frameRate = info.get(MediaInfo.StreamKind.Video, i, "FrameRate", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name); short width = info.get(MediaInfo.StreamKind.Video, i, "Width", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name); int audioBitrate = info.get(MediaInfo.StreamKind.Audio, i, "BitRate", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name); int audioChannels = info.get(MediaInfo.StreamKind.Audio, i, "Channels", MediaInfo.InfoKind.Text, MediaInfo.InfoKind.Name);