On Wed, Jul 1, 2020 at 5:00 AM Nicolas George <geo...@nsup.org> wrote:
> Simon Roberts (12020-06-30): > > I get: > > [alsa @ 0x55ac7254fd80] cannot set sample format 0x10000 2 (Invalid > > argument) > > hw:1,0: Input/output error > > This message could be made better. This is s16le, which should be the > most common format, but we never know. > Interesting. Yes, when I (as you suggested below) use the plughw, it does indeed record in 16le, but even setting this manually, still rejects. Ah well. > > But I'm not sure where to start with configuring this sample format. Can > > someone point me in the right direction? I didn't find much in the alsa > > section of the online manual. > > ALSA can be tricky. I suggest you try first to use the card with aplay, > fiddling with -f to find what format it supports. And then, when it > works, transpose this into ffmpeg options. > > Or you could let ALSA make automatic conversions by using plughw instead > of hw. > 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. Many thanks! Simon _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".