Rendered files from Vegas Pro 20/22 not uploading to Instagram or Telegram

Hello,

I've installed the classic Voukoder plugin for Magix Vegas Pro (versions 20 and 22). I'm getting much better quality renders with it, for both H.264 and H.265 codecs.

However, I've run into a problem I can't solve. No matter which preset or settings I choose for rendering, the final video file won't upload to two key social media platforms: Instagram and Telegram. The platforms simply don't recognize or process the file.

I've tried everything I can think of:

• Changing the container from .MP4 to .MOV.
• Switching between AVC (H.264) and HEVC (H.265) codecs.
• Rendering with different hardware encoders (NVIDIA NVENC, Intel QSV) and the main CPU (software render).
• Changing the bit depth from 8-bit to 10-bit.

In every case, the resulting video plays perfectly on my computer, but it is rejected by Instagram and Telegram. YouTube supports voukoder h.264, but some voukoder h.265 uploads result in heavy artifacting and pixelation. This is also an issue in our case.
What could be wrong here? What can I do to fix this?

Zitat von Vouk

The reason for getting different qualities could be that you don't change the default quality.

In case of the "constant rate factor" and "constant quality" the lower the value, the better the quality. 0 should even mean lossless video.

Yes, I'm aware of the quality issue, that's a simple point, but the problem is completely different. The issue is that no matter what settings I use when rendering with the Voukoder (including h264 8-bit), the social networks I mentioned (Telegram and Instagram) don't recognize the video file. However, if I use Vegas's standard renderer, the video file is recognized and uploads just fine.