[FFmpeg-trac] #4261(ffmpeg:new): Systematic artefacts from 10bit Source
FFmpeg
trac at avcodec.org
Wed Jan 14 17:13:02 CET 2015
#4261: Systematic artefacts from 10bit Source
-------------------------------------+----------------------------------
Reporter: solidghost | Owner:
Type: defect | Status: new
Priority: normal | Component: ffmpeg
Version: unspecified | Resolution:
Keywords: artefact | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+----------------------------------
Comment (by solidghost):
Here you can download a ZIP-File containing som 10_bit files and ProRes.
https://www.filecentral.se/filecentral/app/sv/pub-downloadForm.html?uuid
=7d66aaaf-04c5-4485-a7f3-e679a27fffc9
1: Use the files above with the command line below.
{{{
ffmpeg -i INPUT.mov -vcodec mpeg2video -aspect {$aspectRatio} -r 25
-pix_fmt yuv422p -timecode_frame_start 0 -minrate 150000k -maxrate 150000k
-b 150000k -intra -flags +cgop -flags2 +ivlc+non_linear_q -dc 11
-sc_threshold 1000000000 -qscale 1 -qmin 1 -qmax 12 -bufsize 47185920
-rc_init_occupancy 47185920 -rc_buf_aggressivity 0.25 -s {$resolution}
-vframes {$frameDuration} -an OUTPUT.m2v
}}}
2: Open the .m2v file in a software that you can zoom in. Like Adobe After
Effects.
3: At the end of the footage you will see some color bars. Zoom-in to the
upper left grey column. There and other places you can see the systematic
artefact pixels. Looks like a checker board.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4261#comment:3>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list