[FFmpeg-user] Issue timelapse fps slowing down until reach 0 fps - thread_queue_size

[Ivan Junckes Filho]

Hi guys, I am generating a timelapse of images, with a logo at the start
and audio.

I am having an issue with fps going down to almost 0 and not finishing the
processing. I also get this message:

[image2 @ 0x1cc28c0] Thread message queue blocking; consider raising the
thread_queue_size option (current value: 8)
frame=  388 fps=0.8 q=28.0 size=   13819kB time=00:00:16.50
bitrate=6860.9kbits/s dup=0 drop=142365

The command I use is:
ffmpeg -r 20 -i
/home/timelapse/clientes/ctech_live/camera1/fotos/convert/frame%04d.jpg
 -framerate 20000/1001  -loop 1 -i
/home/timelapse/clientes/ctech_live/config/logo.png -i
/home/timelapse/config/audios/audio2.wav  -filter_complex "[1:v]
fade=out:st=3:d=1:alpha=1 [ov]; [0:v][ov]
overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2 [v]" -map "[v]"
 -filter:a "[2:a] afade=t=in:ss=0:d=5, afade=t=out:st=25:d=5" -map 2:a
 -strict -2 -t 30
/home/timelapse/clientes/ctech_live/camera1/timelapse/timelapse22-11-2019-21-44-57.mp4

Anyone can help?