Live production issue SDI+AUX to HDMI

Hi guys, We have camcorder with 3g-sdi video output, audio comes from AUX feed, we need to combine sdi feed and aux feed to HDMI signal, because we have qam modulator, so in order to get qam rf output we need to have hdmi input. It would be easier if we had embedded sdi audio, but it seams from AUX. Are there any solutions for SDI+AUX → HDMI ? Thank you!

Audacity doesn’t directly interface with video services. Under some conditions, Audacity will open a video file and play the audio parts, but it doesn’t edit or produce video at all.