On Sat, Aug 7, 2021 at 2:33 AM Michael Niedermayer <mich...@niedermayer.cc> wrote:
> 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 > Thanks. Double checked, this commit should be reverted since options are parsed and passed to libswscale correctly. Previous issue I was trying to fix is more like a log print issue rather than an option parsing issue. New patch sent to the maillist. Sorry for the revert. After this commit the output is just black > > sample seems here: > https://samples.ffmpeg.org/FLV/flash_with_alpha/ Does filter_complex support the same usage or there are other methods to pass swscale_option? # ffmpeg -i laraShadow_dl.flv -filter_complex "sws_flags=bilinear;format=yuv420p" -alphablend checkerboard -y patched.avi The output is black, "-alphablend checkerboard" seems not passed to the auto-inserted scale filter. - linjie _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".