On Wed, Jul 1, 2020 at 12:22 PM Nicolas George <[email protected]> wrote:
> Simon Roberts (12020-07-01): > > Magic! plughw:1,0 works a treat. Are there any limitations, or caveats, > > that I should be aware of? Is this a risk or tradeoff of any sort? I note > > that the recording seems to be 16le, so I have no immediate evidence of > it > > being in any way less than optimal, but since I'm afraid I had never come > > across this, I don't know what I don't know. > > With hw, you are talking directly with the sound device, you have to > provide parameters that it accepts, exactly: correct format, correct > number of channels, correct sample rate. > > With plughw, you tell ALSA to insert the "plug" plugin before the actual > device, to do automatic conversion. Therefore, it accepts any format, > number of channels, sample rate, but there is a conversion happening and > you do not know what it is. > > > Ah, so it will be (a little?) less efficient, right, and it could conceivably lose some qualtiy. I guess I should persevere with trying to work out how to use hw: directly then. Thanks that's good to know. _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
