Livio Tenze (12021-02-15): > -The audio source comes from alsa: here I see really strange behaviour. The > pts value of the second packet with respect to the first pts packet seems > to be "delayed" from 0.4s to 1.8s. I don't understand this behaviour: I > checked the time from start to the second packet and the elapsed time > cannot be justified (ms and not s).
Can you observe the same phenomenon using ffprobe? ffprobe -f alsa -i default -show_packets -of compact | head -n 50 | less -S would be a good way to look. Do you observe warnings on the console? How does your application handle parallelism between encoding and reading from devices? > -Finally, when I write audio and video in the output MP4 stream (I use > libx264 and libfdk_aac for video and audio respectively) the audio stream > is delayed. Do the timestamps between audio and video match before encoding? Regards, -- Nicolas George
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