Hi! This has been driving me crazy. I've recorded a dark video using my phone Sony Z3. Played perfectly (just dark because of low lighting). Trimmed it using ffmpeg, still perfect. So I tried HitFilm 3 Express to make it brighter, all cool, but the video is a tiny bit faster than audio! Adobe Premiere - same thing. It starts in sync but after 3 minutes there's a difference of sth like 0.5s. I've been using the project sample rate for audio and frame rate for video as in the source (48KHz and 29.97fps respectively). Also tried exporting in constant bitrate - to no effect. The discrepancy is present already in the preview in the editing software. Ridiculously enough, in HitFilm, both the video clip and the audio clip are the same in length... but the audio is cut off when the video clip ends, leaving the final bit unplayed, and there is no way to expand the audio clip beyond that point. Is there anything I can do other than spending the next 5 years all days improving my programming skills to write my own video editing software?