No audio in Davinci Resolve

Topaz Video Bugs and Issues
1

My Tools: Topaz Video 1.3.1 / Davinci Resolve 20.3.1 / Windows 11

After exporting a video with pcm audio, the audio is missing in Davinci.
The audiotrack is visible in Davici with no content, but is playing fine in other tools.
Mediainfo or ffprobe shows no difference between input and output of the audiostream.
The original video-file is also playing fine in Davinci

I’ve tried various videos, and they all behave the same way, but if I use MKV as container it works!!
Input: h264 / PCM / .mov
Input: h264 / AAC / .mp4
Input: ffv1 / PCM / .mov

output: h264 / PCM convert or COPY PCM / .mov → no audio in Davinci
output: h264 / PCM convert or COPY PCM / .mp4 → no audio in Davinci
output: h264 / PCM convert or COPY PCM / .mkv → audio is fine in Davinci
output: h264 / AAC / .mov → audio is fine in Davinci

2

All those file containers with h264 and pcm audio, exported from Topaz Video, normally work fine with Davinci Resolve Studio (I’ve used them all). Possible sticking points:

  1. The PCM format used (signed 24bit little-endian is usually ok).
  2. Davinci Resolve Free vs Studio (uncertain of codec limitations).
3

To be clear… something in Topaz is wrong.
The original files are playing fine in Davinci..
A simple “Copy Audio from pcm“ to a MOV-Container is enought that Davinci does not read it.

4

To also be clear, PCM in a MOV container, exported from Topaz Video, does work in Davinci Resolve.

If the exports from Topaz play fine everywhere else, but not Davinci Resolve, then you’ve found a limitation with Resolves MOV compatibility, which may or may not be the fault of Topaz Video.

Wherever the fault lies, a small sample would be needed for testing.

5

Can you share the logs for review into the file export settings? This way we can try and replicate the situation and see how the app is encoding the audio file and everything. help@topazlabs.com

To gather logs, please select Help > Logging > Get Logs for Support and attach the zip file to your reply.

Here is a video to help with the steps of how to collect the logs.

6

Have send you the logs and sample files… I also tried other files with the same result.

7

It might an issue with what audio track is set as default. The fact that it works with MKV is a clue, since MKV allows any track to be the default audio track. Most other formats just use the first track found. If you have VLC available, check the Audio option to see if you have more than one audio track in the file.