The "black crash" for the Hauppauge is so minor I wouldn't even touch it.
If you decode to RGB there is at the most one component (typically the Blue) which goes to zero. The others are still positive. Crop the black borders and head switching crud off and apply blur(1.5).blur(1.5) to see that even these excursions disappear, so the occasional infra-blacks are just noise as I see it.
(I refer to the file 'HR-J668-DMRES10-HauppaugeLive2.avi' which IMO is just perfect).
Edit:
Or run jagabo's commandline to visualize the waveform:
Code:
"ffplay.exe" -hide_banner -loglevel 24 -stats -loop 0 -i "HR-J668-DMRES10-HauppaugeLive2.avi" -an -sn -color_range 2 -vf "split=2[a0][b0];[a0]waveform=filter=lowpass:scale=digital:graticule=green:flags=numbers+dots:components=1:display=stack:envelope=instant[a0o];[b0][a0o]vstack[out]"