Cars.2006.1080p.bluray.x264.aac-etrg -

, the file size is significantly smaller than a full Blu-ray disc (which can be 25–40 GB). They used the

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AAC generally provides better sound quality than MP3 at the same bitrate. It is also a highly versatile format, capable of supporting everything from mono and stereo to multi-channel surround sound like 5.1. As a result, AAC is the standard audio format for platforms such as YouTube, iTunes, and many mobile devices. In the context of the -ETRG release, it's safe to assume the audio is a high-quality surround sound mix, perhaps a downmix of the original Blu-ray's pristine LPCM 5.1 or Dolby TrueHD track.

: This specifies the original source material used for the encode. It means the file was ripped directly from a physical Blu-ray Disc, ensuring high-quality source video and audio compared to rips from television broadcasts (HDTV) or streaming sites (WEB-DL).

This indicates the release year of the film.