Le nonidi 29 pluviôse, an CCXXV, christina zou a écrit : > 1. ffmpeg -f alsa -acodec pcm_s32le -i mic_sv temp.wav > > 2. arecord -Dmic_sv -c2 -r48000 -fS32_LE -twav temp.wav > > Command 1 takes 95% CPU and produces stuttery, clicky unusable audio. > > Command 2 takes 5% CPU and produces perfect audio. > > I'm on a Pi Zero. I compiled FFMPEG with ALSA support. > > After a long chat in FFMPEG IRC, we believe there is something wrong with > the way FFMPEG waits for ALSA packets. At the very least, FFMPEG waits for > ALSA packets differently than arecord does.
Could you show us the output of the following command: time ffmpeg -i temp_arecord.wav temp_ffmpeg.wav ... where temp_arecord.wav is the correct, non-stuttering file produced by arecord? And then the output of this one: time ffmpeg -i temp_arecord.wav -c copy temp_ffmpeg2.wav Regards, -- Nicolas George
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