I'm using FFmpeg to save screencasts to disk. I start FFmpeg and pause,
continue or stop the screencast by sending signals to the process. I found out
that in recorded screencasts with pauses the audio does not pause and continues
as if FFmpeg was actively running. Because of that, after resuming the
recording the audio is out of sync. The audio between the interruption and the
resuming is included in the recording. While interrupted ffmpeg's
status is Tt as printed by ps. On the other hand pw-top shows ffmpeg's node
with status R (running). My OS is openSUSE Tumbleweed 20240202. The
command I'm executing is as follows: ffmpeg -device /device/dri/card1
-framerate 50 -f kmsgrab -i - -f pulse -i $(pactl get-default-sink).monitor
-filter_complex "[0:v]
setpts=N/(FR*TB),hwmap=derive_device=vaapi,fps=fps=50,scale_vaapi=format=nv12;[1:a]
asetpts=N/(SR*TB);" -ac 2 -c:a libopus -b:a 128k -c:v hevc_vaapi -bf:v 8
-rc_mode:v CQP -profile:v main -tier:v main -level:v 4.0 -global_qualit
y:v 24 -qmin:v 20 -y output.mkv & Then I send to ffmpeg signals
as needed, with kill. kill -SIGINT ${pid}, kill -SIGSTOP ${pid}, kill -SIGCONT
${pid}. I want to know if it is possible to stop recording sound
while the process is paused (stopped in signal terms).
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