Opus recording (opus directly or after conversion...)?

[golemusu]

Hi. How is opus recording functionality working.

I have tested now several recording apps. I am doing very long recordings (8 - 48 hours) to monitor Sleep Apnea and also security surveillance.

Because of the length to keep file sizes reasonable I am using very low bitrates, typically 32kbps.

At this bitrate there is usually only 2 alternatives, M4A (AAC) or Opus. Id of course prefer opus because it is more advanced and open source.

BUT what I have noticed is that when you choose opus as recording format it seems that recording is actually done to some different format and then converted to opus after recording. When length of recording is 24 hours this conversion can take extremely long and often crashes the recording app. Some apps when you choose M4A aac seem to not do after conversion.

So how does Fossify recorder work? When is encoding done real time to end format and when it is done afterwards?

Opus has been designed for teleconference/telephone (among many other things) so real-time encoding should be trivial IMO.

[naveensingh]

Whatever format you choose is encoded on-the-fly. There is no conversion in place.

Maybe what you are observing is FossifyOrg/Voice-Recorder#80