Hello.
There you go: http://www.mediafire.com/download/crmj9d7ylsg32dm/x264_crf0_hardsub.mkv Encoded with x264, revision 2692, 10bit, preset veryslow, CRF 0. Cheers, R.S. On Fri, Jul 15, 2016 at 8:56 AM, Deepthi Nandakumar < [email protected]> wrote: > Hi, > > Sorry I couldnt get to this before v2.0. Can you share a file with the > subtitles burned into the x264-crf0 lossless video? > > Thanks, > Deepthi > > On Sun, May 15, 2016 at 3:49 AM, Rômulo Silva <[email protected]> wrote: > >> Some more info on the issue. >> >> >> I updated my x265 encoder to 1.9+167 and tested the same sample with the >> same parameters (CRF 21, 10-Bit, preset slower) with --no-recursion-skip as >> the only additional parameter. >> >> >> x265 hardsub sample [--no-recursion-skip]: >> http://www.mediafire.com/download/lx98hc6n5b40db2/hardsub+test+norecursionskip.mkv >> >> >> The result is much better compared to not using the --no-recursion-skip >> parameter, but there's still some ghosting on both books in the scene >> around the letters. File size is around 10% bigger, and encoding time was >> more or less 50% slower just like pointed out here: >> http://forum.doom9.org/showthread.php?p=1767551#post1767551 >> >> >> Thanks again, >> >> R.S. >> >> On Mon, May 9, 2016 at 5:59 PM, Rômulo Silva <[email protected]> wrote: >> >>> This is related to issue #214: >>> https://bitbucket.org/multicoreware/x265/issues/214/ghosting-artefacts-even-with-low-crf-when >>> >>> >>> Turns out that it's easy to reproduce the problem with hardsubs, and >>> I've included both x264 and x265 samples below to illustrate this. >>> >>> >>> Lossless x264 sample: >>> http://www.mediafire.com/download/ftwysmcemw7211a/x264+crf0.mkv >>> Sample subtitle: >>> http://www.mediafire.com/download/jttvyk2k0va9c3g/lorem+ipsum.ass >>> x264 hardsub sample: >>> http://www.mediafire.com/download/nzp7pzz5y8h7yjy/hardsub_test_x264.mkv >>> x265 hardsub sample: >>> http://www.mediafire.com/download/mz51v2a8d99pa5t/hardsub+test.mkv >>> >>> >>> Both hardsub files were encoded with CRF 21, 10-Bit and slower preset. >>> X265 encoder version was 1.9+150-00ea3784bd36. >>> >>> You can clearly see the artifacts between the two lines on top of the >>> left book. Some ornaments get distorted around the letters, and straight >>> edges don't move according to the scene. >>> >>> A few suggested workarounds, like --no-cutree, make the ghosting less >>> apparent, but it still doesn't solve the issue completely. I've included >>> below a sample of the same x265 encode used above (CRF 21, 10-Bit, slower) >>> with --no-cutree as the only additional parameter. >>> >>> >>> x265 hardsub sample [--no-cutree]: >>> http://www.mediafire.com/download/abvwr1jbp47uw29/hardsub_test_nocutree.mkv >>> >>> >>> The resulting file has over twice the size, and even though the >>> artifacts on ornaments are mostly gone, some straight edges in between the >>> lines are still not moving according to the scene. >>> >>> Has any progress been made on this issue? I'm willing to help by >>> providing more samples and test cases, if needed. >>> >>> >>> Thanks for your attention, >>> >>> R.S. >>> >> >> >> _______________________________________________ >> x265-devel mailing list >> [email protected] >> https://mailman.videolan.org/listinfo/x265-devel >> >> > > > -- > Deepthi Nandakumar > Engineering Manager, x265 > Multicoreware, Inc > > _______________________________________________ > x265-devel mailing list > [email protected] > https://mailman.videolan.org/listinfo/x265-devel > >
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