IMAX Pre Show 2015 and Pre Show 2014 — DD 5.1 and DTS-HD MA 5.1 MKV
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IMAX Pre Show 2014 and Pre Show 2015 — lossless and extended
Only two files on this page, but between them they cover the two most practical use cases for IMAX demo material at home: lossless codec verification and extended spatial evaluation.
Pre Show 2015 pulls 10,790 downloads in DD 5.1 only. At 1 minute 11 seconds and 39.9MB it’s the longest file in the HD IMAX library — nearly 30 seconds longer than any other trailer in the section. Running a demo file for over a minute exposes things a short clip cannot — channel balance drift, subwoofer integration at sustained levels, and rear surround consistency over time rather than just at the opening transient. Pre Show 2015 was put together for the IMAX pre-show slot, so the audio decisions were made with a giant screen in mind. Bringing that into a home setup creates a useful stress test: what sounds right in a 100-foot screen environment tends to reveal calibration gaps at home listening distances.
Pre Show 2014 comes in two versions — DTS-HD MA 5.1 lossless at 8,060 downloads and DD 5.1 at 5,730. Combined that’s 13,790 downloads, which puts 2014 ahead of 2015 in total volume when both tracks are counted together. At 45 seconds and up to 120MB for the lossless version it’s the more compact option, but the DTS-HD MA track makes it the better file for bitstream verification and lossless codec testing on this page. The difference in file size between the DD 5.1 version at 101MB and the lossless at 120MB is relatively small, which reflects the efficient encoding of the 2014 production compared to the higher-bitrate Cliffhanger material on page 1.
For a complete evaluation of what the IMAX library offers, both files on this page serve a different purpose. Pre Show 2015 is the sustained spatial test. Pre Show 2014 lossless is the codec verification. Running them in sequence gives a more complete picture of system performance than either file alone.