[audio] Bug: Loud sound glitches on right channel after rendering with Hitfilm
There's another bug in Hitfilm (15.2.10619.40501) that has been ruining the audio of all the videos I've rendered, and has been taking me hours of work to correct the audio manually, each time it happens.
Randomly across the video, there are very high-pitched and loud sound artifacts appearing on the right channel of my audio. The left channel is always immaculate. If I do a spectrum analysis of the audio before (source file), and after rendering with HitFilm, this is what I see:
The top 2 of those 3 audio artifacts cannot be heard (by me at least), but the one on the bottom (15KHz) can be heard as a very sharp BEEP on my right ear; when loud enough, it even hurts.
This problem happens in any render from Hitfilm: MP4 with AAC audio, MP3 audio, or WAV audio directly; all of them have these glitches at exactly the same moments in time. If I play back the video within HitFilm in the preview window, I can also hear the BEEPs at those moments. If I render the same project multiple times, the moments when this happens are also always the same. But different source videos will have audio glitches at different moments.
To reproduce this problem, I do the following:
- Record an .mkv using OBS, capturing a single source of audio from a video game (in this case, doom)
- Use HandBrake to transcode the video into .mp4 (with CFR)
- Create a new HitFilm project, import and add the .mp4 video into the project timeline
- Without editing or adding effects, I immediately render a .WAV file with the audio only
Attachment - ZIP with source .mp4 and HitFilm project to create the problem and the resulting .WAV file with the glitches (they happen at several moments; I can hear the ones at: 12s, 20s, and 35s):
Attachment - MediaInfo of the source file:
Because I can hear these audio glitches when previewing inside HitFilm, I believe this might be an audio-decoding problem; but I'm not sure what exactly is the cause.
Has anyone else had this problem? Am I doing something wrong to cause this problem? Is there something wrong with Hitfilm's audio processing?
Any help in understanding/solving this problem is greatly appreciated.
Specs: Win10-64bit (bug happened in Win7-64bit too). Intel i7 7700K @ 4.2GHz. 16GB of RAM. GeForce 1080ti. Samsung SSD 850 EVO, and two other Western-Digital HDD drives for storage. Creative X-Fi Titanium PCI-e sound card.