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
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