x264 Quantizer Debug

[albesp77]

Hi to all, i want to know if is possible to know frame-by-frame quantizer value after x264 encoding, because i want to manual see the worst compressed frame, to evaluate with my eyes how worst really is, is possible ?

[poisondeathray]

Did you mean average mb quantizer per frame ?

One way to visualize this this is ffdshow's osd. You can enable "frame mean quantizer". It's possible to print out a csv that you can search in a spreadsheet or text editor. You can also visualize individual mb quantizers with the visualiztion option

[raffriff42]

ffplay-generated CSV data files (see "xxxx-ffplay-debug.txt, column "qp")
http://forum.doom9.org/showthread.php?p=1693064#post1693064

ffdshow-generated file, plus on screen display:
http://forum.doom9.org/showthread.php?p=1693552#post1693552

[albesp77]

Thanks for answers, good to know!