On a hunch, I rendered the same 10-second video project as above, using every available Voukoder audio format. The only thing that I changed was the audio format; video settings are identical to the clip posted above. All tests done with Vegas Pro 20.0 / Voukoder 13.2beta1.
Results varied widely, and none worked properly except Uncompressed PCM. All PCM bit depths work, 16/24/32-bit.
Rendering using AAC, AC3, MP3, EAC-3 (DD+), and Vorbis yields files where the video does not move on the screen, although the audio plays.
ALAC format gives a video that plays, but no audio except the last 1 second.
Dolby TrueHD crashes Vegas after 39 rendered frames. See screenshot.
DTS yields a 1m50s file (remember the project is only 10s) that will never stop playing in VLC. Video plays, but picture stops moving at 10s. No audio except brief blips at ~6.5s and ~9.5s.
FLAC yields a 1m50s file. Video plays but picture stops moving at 10s. Brief (~0.5s) audio at beginning of track, then no audio until last 10s of file (i.e., audio plays from about 1m40s to 1m50s).
MP2 audio format gives a video that plays, but no audio except the last 2 seconds.
WAVPACK format gives a video that plays, but no audio except the last 1 second.
Log files: Voukoder logs 20230710.zip
Update: All of the above formats tested and working properly in Voukoder 13.0.2 except Dolby TrueHD which still crashes Vegas, and DTS which produces a 10s (not 1m50s as above) infinitely-playing track where the video stops after 10s and with no audio except brief blips from time to time.
