[x264-devel] Bug with flashing scene

[Marco Munderloh]

Hi David,

I can't reproduce this as I don't have the manual QP file you specified.
So I guess the problem might be the qp file itself?

Best, Marco

On 19.04.2014 06:26, David Mackenzie wrote:
> Hi x264 devs,
> 
> I'm encoding some animated content, and this scene produces some very
> bad distortion on the output during a sequence where the screen flashes
> black and white (frame 55).
> 
> You can grab the source file (UTvideo AVI format) and the x264 encode
> showing the problem here:
> 
> http://mab.to/fr5KCBOTJ
> 
> I've tried this on several different software players, it doesn't seem
> to be a bug in the decoders (all replicate it exactly). Have yet to burn
> it to disc and try it on a set-top player though.
> 
> Forcing the affected frame to be an I-frame (with "K -1" in the QPfile)
> does work around the error.
> 
> Command line used:
> 
> x264.exe --aq-strength 0.4 --bitrate 30000 --preset veryslow --tune film
> --bluray-compat --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1
> --keyint 24 --open-gop --slices 4 --colorprim "bt709" --transfer "bt709"
> --colormatrix "bt709" --sar 1:1 --qpfile
> "c:\autovenc\tickets\inprog\scherzo_inferna.avs_ticket.chaps" --stats
> "c:\autovenc\tickets\inprog\scherzo_inferna.avs_ticket.stats" --pass 1
> -o
> "G:\Authoring\xxx\D1_Shorts\Asset\secondBatch\scherzo_inferna_bug.avc"
> "f:\scherzo_inferna.avs"
> 
> 
> Thanks as always for your work on this outstanding encoder.
> 
> -- 
> -- 
> David Mackenzie
> DVD / Blu-ray Compression & Authoring
> AV Calibration and Consulting
> ISF Certified Calibrator
> 
> US: +1 914-902-8928
> UK: +44 (0) 203-239-6816
> 
> 
> 
> _______________________________________________
> x264-devel mailing list
> x264-devel at videolan.org
> https://mailman.videolan.org/listinfo/x264-devel
> 


-- 
Dipl.-Ing. Marco Munderloh             Mail: munderl at tnt.uni-hannover.de
Information Technology Laboratory (LFI)          Phone: +49 511 762-5017
Leibniz Universitaet Hannover, Schneiderberg 32    Fax: +49 511 762-5052
30167 Hannover, Germany     Web: http://www.tnt.uni-hannover.de/~munderl

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