When you download video or audio files using a BitTorrent application, you get to see some information while you are downloading. This includes all files included in the download for example, which can be useful in determining if you can run them on your system or if you need extra programs or codecs for that.
As far as video files go, you get to see the file name and extension, which may provide you with all the information needed to play them. Or, if you run a program like VLC Media Player or SMPlayer, you do not really need to take extra care of that, as you know that the video player will play all media files just fine and without the need to go codec hunting.
While the extension may give you an indication, you may still run into issues when you try to play a video file that you have just downloaded depending on which codec it requires to play.
One of the features of uTorrent is the ability to display the codecs required to play video files. While I cannot vouch that it will identify all codecs in all files correctly, it did a good job during tests.
Note: After some more testing, it turns out that only select codecs will be identified properly. A basic example is a music release. If the files are offered in mp3 and ogg format, only the codec required to play the mp3 file are displayed, while nothing is displayed for ogg files.
Here is how this works.
While that may not be that spectacular for audio files, it may be helpful in regards to video files that you want to play on your system, especially if you favor a media player that requires external codecs to play most media files.
It may still be necessary to do some research on the codec after you found out what it is. The best course of action is obviously to wait until the download has completed, play it to see if it is compatible, and if not, start to research which codec you need to play it properly on the system.
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