Did you read and follow the instructions on section 1 here Downloads & Instructions ?
You need to install FFmpeg first. This package is doing the actual encoding work. Due to licensing (and software patent) reasons this can't be bundeled anymore.
It is not supported yet.
This might not help, but I'll investigate it.
Can you try version 2.0.11 and re-test?
Die Fehlermeldung meldet dass er die FFmpeg 7.1 DLLs nicht finden kann. Voukoder Pro nutzt die EXE Datei nicht, sondern rein die DLLs.
Maybe you should continue using CRF 17. And if it's not good enough use a value lower than 17. The lower the value the better is the visual quality (and bigger the file size).
Normally Voukoder Pro picks the audio layout that gets exported from Premiere / Media Encoder. I will investigate this.
What error did you get? Did you check the Voukoder Pro log file?
Didn't hear about this issue anymore with the latest version.
For all future reports of this issue. This is a generic error message if something/anything is not correct. Most likely an incorrect encoder or an invalid parameter of it.
There will be a better error reporting in the next version 3.0!
Please send a Voukoder Pro Logfile or a perform a scene test and copy the log here.
I don't have access to the 2020 version of After Effects anymore, but with the 2025 version its working:
It depends on the implementation.
ChatGPT explains it like this:
Yes, technically: The MP4 container supports AV1 using the AV1 ISO-BMFF format, and tools like FFmpeg can place the moov atom at the beginning even for AV1.
However, support depends on the muxer and player:
- FFmpeg with -movflags +faststart works, but you must use libaom, libsvtav1, or other AV1 encoders that output compatible streams.
- The AV1 stream must be correctly formatted according to the AV1 codec ISO Media File Format Binding specification (ISO/IEC 14496-15:2017 + amendments).
- Some older players or browsers may not fully support AV1-in-MP4 yet, especially for streaming.
This has been added.
That's not how it works. Please run either the GPL or LGPL installer MSI file. It will copy the files to the right location and do also the required additional steps.
What FFmpeg libraries / package(s) did you install?
Please try rounding the value to 2S as I asked above. I don't know if FFmpeg rounds it down to the nearest integer value.
Ah, maybe the thousands of this value is correct. Can you try 2S (2 Samples) (as it is actually 1.98912S) for 48KHz?
Correct! But don't forget the uppercase S at the end.
It's the return of this issue. It's a VEGAS bug, not a Voukoder Pro bug. The audio is delayed by 0.0444 seconds (Vegas Pro: Audio Shift in rendered video).
Voukoder Classic added a hidden filter with this specification:
const float delay = 44.4F;
std::stringstream ss;
if (strlen(config.audio.filters) > 0)
ss << config.audio.filters << ",";
ss << "filter.adelay#delays=";
ss << std::round(((float)m_pTemplate->Audio.Render.wfx.nSamplesPerSec * delay) / 1000.0F);
ss << "S:all=1";
strcpy(config.audio.filters, ss.str().c_str());This is not present in Voukoder Pro anymore because the filter chain has been entirely reworked, but you can add a filter after the audio input node:
This is currently untested, but you can give it a try.
Currently this is not possible. But it's on my list to finish this for the 2026 release.
Some older versions had issues with the "profile" option. I had to update my FFmpeg to fix that issue.