I've used MeGUI with a screen capture and PCM audio. The muxed output MP4 has no audio. Aften and ffmpeg will create a stereo AC3 file at 128k and 22050 which match the original PCM source. I tried to mux that audio with the MeGUI-created video using mkvmerge. End result is a muxed file but the audio does not play because it is unrecognized. MeGUI's muxer drops the audio file, writing only the video portion.
Is there a required audio sampling rate? Do I need to resample? If so, is mono supported?
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