How I make radio reception videos without excessive video or audio quality loss

  • Wednesday the 23rd of March, 2022


Today I felt like telling you all how I make my YouTube radio reception videos, from editing the audio to cutting the video without ever re-rendering the video or audio leading to any quality loss.

I start by setting up SDR# with the best settings for the content I want to record. I use 52dB on SDR#s volume setting.
I then use to make some transparent PNG graphics that have the thumbnail and demodulation information in them.

Next I setup 3 scenes in OBS that are SDR# on its own, SDR# + thumbnail overlay and SDR# + demodulation information overlay. The OBS recording settings I use are 5000kbps CBR video in “Ultrafast” preset and 320kbps audio set to the correct resolution for my screen in a .ts container file.

Now I start the recording with OBS in the thumbnail scene and start SDR#. I wait for a good moment to switch the scene to the SDR# + overlay and then finally the bare SDR# scene and leave it to record the rest of the broadcast.

Now that I have a video file created, I use VideoReDo to add cuts to the video. VideoReDo edits the video stream deleting unwanted data without having to re-render the entire video! I use the audio sync settings in VideoReDo to synchronise the audio to the waterfall for a nicer viewing experience.

Next I drag the cut file into Audacity, use the “Amplify” option to lower the volume by about 6dB before applying my custom EQ for the broadcast lastly using the normalise option to bring the volume back up to peak at -0.2dB.I save this as a .wav for no extra loss.

To finnish off, I use a program called “mkvtoolnix-gui” to add the wav into the video file that VideoReDo made, making sure to put it above the AAC audio and to mark it as forced & default. I like to add notes of what settings I used on the audio at this point too.

The final mkv file that mkvtoolnix-gui makes can then be uploaded to YouTube ready for the world to enjoy without ever re-rendering the audio or video in a lossless codec!