So, refers to a very specific Hindi audio stream attached to a particular high-definition rip of the movie. The "39" suggests that the file containing this audio was likely a massive "remux" (a direct copy of Blu-ray video) that included dozens of global audio tracks, with Hindi arriving near the end of the list. Why Version 39? The Sweet Spot of Quality Over the years, several Hindi dubs of Inception have been released. The official theatrical Hindi dub (done by Splash Entertainment for Warner Bros. India) is excellent, but it was only released on DVD and television broadcasts. The quality was limited to 192kbps AC3.
Then came the fan-edited "Collector's Edition" remuxes around 2015-2018. Among these, a specific release—often labeled Inception.2010.1080p.BluRay.REMUX.AVC.DTS-HD.MA.5.1-EPSiLON or a similar variant—included a rare, re-synced Hindi audio source taken from a later broadcast. That track was indexed as . inception hindi audio track 39
Streaming services use "adaptive bitrate streaming." To save money, they compress audio down to 128kbps HE-AAC. Additionally, the Hindi track on streaming services is a different dub—often re-recorded in 2020 for a wider PG-13 audience, changing key voice actors for Leonardo DiCaprio and Joseph Gordon-Levitt. So, refers to a very specific Hindi audio