I'm trying out encoding video with ffmpeg using
x264 on a NAS machine with a 2.4 GHz processor. This yields a terminal output that has a high number in the
frame= 236 fps=0.2 q=29.0 size= 1038kB time=00:00:08.82 bitrate= 963.4kbits/
When I encode using
x265 on my standard computer, I get something that looks like this:
frame=67350 fps=0.7 q=-0.0 size= 416991kB time=00:37:28.41 bitrate=1519.3kbits/
It is my understanding that
q= stands for quality, and should probably be as close to
0 as possible, while a low number close to
q=31 indicates poor quality and that ffmpeg has difficulties reaching an acceptable bitrate.
Is this something specific to
x264 or is it that my settings for the NAS machine are too demanding? The video sources are 1080p at 30 fps.
ffmpeg -i "$i" -c:v libx264 -preset veryslow -crf 23 -af "volume=25dB, highpass=f=200, equalizer=f=50:width_type=h:width=100:g=-15" -c:a aac -strict experimental -b:a 192k
Should I be concerned about this, and what can be done about it?