On Thu, Aug 05, 2021 at 02:30:32PM +0000, Linjie Fu wrote: > ffmpeg | branch: master | Linjie Fu <linjie.justin...@gmail.com> | Sun Aug 1 > 18:58:19 2021 +0800| [b3a0548a981db52911dd34d9de254c4fee0a8f79] | committer: > Linjie Fu > > fftools/ffmpeg_filter: fix the flags parsing for scaler > > Scaler relys on "-sws_flags" option to pass the flags to swscale > and scale filter. Currently passing "sws_flags=xxx" as a filter > option to scaler leads to an incorrect option parsing. > > Check and change the string to "flags=xxx" and dumped flags information. > (Refer to parse_sws_flags()) > > CMD: > $ffmpeg -v verbose -i input.mp4 -sws_flags lanczos+bitexact+accurate_rnd \ > -vf format=yuv420p,scale=800x600 -an -vframes 10 -f md5 - > > Before: > [auto_scaler_0 @ 0x7f96c3808680] w:iw h:ih flags:'' interl:0 > [auto_scaler_0 @ 0x7f96c3808680] w:1920 h:1080 fmt:yuvj420p sar:0/1 -> w:1920 > h:1080 fmt:yuv420p sar:0/1 flags:0x0 > [Parsed_scale_1 @ 0x7f96c3806e40] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:800 > h:600 fmt:yuv420p sar:0/1 flags:0x0 > MD5=ff1d6091690c6fcd36d458d2a9f648ce > > After: > [auto_scaler_0 @ 0x7fe94563b4c0] w:iw h:ih > flags:'lanczos+bitexact+accurate_rnd' interl:0 > [auto_scaler_0 @ 0x7fe94563b4c0] w:1920 h:1080 fmt:yuvj420p sar:0/1 -> w:1920 > h:1080 fmt:yuv420p sar:0/1 flags:0xc0200 > [Parsed_scale_1 @ 0x7fe945639d00] w:1920 h:1080 fmt:yuv420p sar:0/1 -> w:800 > h:600 fmt:yuv420p sar:0/1 flags:0xc0200 > MD5=ff1d6091690c6fcd36d458d2a9f648ce > > Signed-off-by: Linjie Fu <linjie.justin...@gmail.com> > > > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b3a0548a981db52911dd34d9de254c4fee0a8f79 > ---
This breaks -i laraShadow_dl.flv -alphablend checkerboard -qscale 2 -t 0.5 file.avi After this commit the output is just black sample seems here: https://samples.ffmpeg.org/FLV/flash_with_alpha/ [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Dictatorship: All citizens are under surveillance, all their steps and actions recorded, for the politicians to enforce control. Democracy: All politicians are under surveillance, all their steps and actions recorded, for the citizens to enforce control.
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