> Am 17.07.2022 um 13:54 schrieb Michael Koch <astroelectro...@t-online.de>: > > Am 17.07.2022 um 12:09 schrieb Denis Połeć: >> >>> Am 16.07.2022 um 22:12 schrieb Michael Koch <astroelectro...@t-online.de>: >>> >>> Am 16.07.2022 um 20:57 schrieb Denis Połeć: >>>>> Am 16.07.2022 um 11:46 schrieb Paul B Mahol <one...@gmail.com>: >>>>> >>>>> On Sat, Jul 16, 2022 at 11:22 AM Denis Połeć <denis.po...@gmail.com> >>>>> wrote: >>>>> >>>>>> Hello, >>>>>> I wouldn't call myself a beginner, but I still need a little bit to >>>>>> become >>>>>> a pro. :) >>>>>> I have a question that might be easy to answer. >>>>>> >>>>>> I am working on a script to bring multiple flat videos into a >>>>>> equirectangular projection by using v360 filter. >>>>>> I have the problem that the edges of the input are very jagged. >>>>>> >>>>>> This did not lead to a good result when I play the equirectangular >>>>>> projection in a 360 player. I have also already tried different >>>>>> interpolation modes, which does not lead to a better result. >>>>>> Does anyone have an idea how I can avoid that? Is there a better way to >>>>>> do >>>>>> this task? >>>>>> >>>>>> >>>>>> Here is an example code with the result. The video in the example has a >>>>>> resolution of 1080p: >>>>>> >>>>>> >>>>>> ffmpeg -i BRAIN.mp4 -lavfi "\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw='0':alpha_mask=1[fg1];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:alpha_mask=1[fg2];[fg2][fg1]overlay[a];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:alpha_mask=1[fg3];[fg3][a]overlay[b];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:alpha_mask=1[fg4];[fg4][b]overlay[c];\ >>>>>> \ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=45:alpha_mask=1[fg5];[fg5][c]overlay[d];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=45:alpha_mask=1[fg6];[fg6][d]overlay[e];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=-45:alpha_mask=1[fg7];[fg7][e]overlay[f];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=-45:alpha_mask=1[fg8];[fg8][f]overlay[g];\ >>>>>> \ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-45:alpha_mask=1[fg9];[fg9][g]overlay[h];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=90:roll=-45:alpha_mask=1[fg10];[fg10][h]overlay[i];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=-90:roll=45:alpha_mask=1[fg11];[fg11][i]overlay[j];\ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=180:pitch=45:alpha_mask=1[fg12];[fg12][j]overlay[k];\ >>>>>> \ >>>>>> >>>>>> [0]v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=90:alpha_mask=1[fg13];[fg13][k]overlay[l];\ >>>>>> [0]drawbox=w=1:h=1:color=black,v360=input=flat:output=e:id_fov=45:w=5120:h=2560:yaw=0:pitch=-90:alpha_mask=1[fg14];[fg14][l]overlay" >>>>>> -q:v 4 -vframes 1 -y test11.jpg >>>>>> >>>>>> Your filtergraph is extremely inefficient with that many cascaded >>>>>> overlays >>>>> and gives poor results. For proper stitching borders need to have small >>>>> transition from full opacity to no opacity. >>>>> >>>>> To add small transitions with opacity on borders could use blurring >>>>> filters >>>>> for example on alpha plane only. >>>> How could I achieve that? How can I blurry just the borders? >>> You could apply some preprocessing to your input video, before you feed it >>> to your script. >>> The trick is to multiply all pixels at the edges by 0.5. This can be done >>> with a white mask which has gray pixels at the edge. >>> >> Thank you for your reply. >> >>> ffmpeg -f lavfi -i color=color=white:size=1920x1080 -lavfi >>> drawbox=color=gray:t=1 -frames 1 -y mask.png >> This works. >> >>> ffmpeg -f lavfi -i testsrc2=size=1920x1080 -i mask.png -lavfi >>> multiply=offset=0 -frames 1 -y test.png >> But ffmpeg says multiply filter doesn’t exist. > > Get a newer version. The multiply filter was added not so long ago.
I am on an M1 Apple machine and it seems I have the latest stable version I can get: 5.0.1_3. --- ffmpeg version 5.0.1 Copyright (c) 2000-2022 the FFmpeg developers built with Apple clang version 13.1.6 (clang-1316.0.21.2.5) configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/5.0.1_3 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librist --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox --enable-neon libavutil 57. 17.100 / 57. 17.100 libavcodec 59. 18.100 / 59. 18.100 libavformat 59. 16.100 / 59. 16.100 libavdevice 59. 4.100 / 59. 4.100 libavfilter 8. 24.100 / 8. 24.100 libswscale 6. 4.100 / 6. 4.100 libswresample 4. 3.100 / 4. 3.100 libpostproc 56. 3.100 / 56. 3.100 Input #0, lavfi, from 'testsrc2=size=1920x1080': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn Input #1, png_pipe, from 'mask.png': Duration: N/A, bitrate: N/A Stream #1:0: Video: png, rgb24(pc), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn [AVFilterGraph @ 0x131e085b0] No such filter: 'multiply' — brew info ffmpeg ffmpeg: stable 5.0.1 (bottled), HEAD Play, record, convert, and stream audio and video https://ffmpeg.org/ /opt/homebrew/Cellar/ffmpeg/5.0.1_3 (272 files, 48.4MB) * Poured from bottle on 2022-06-28 at 22:56:20 From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/ffmpeg.rb License: GPL-2.0-or-later ==> Dependencies Build: nasm ✔, pkg-config ✔ Required: aom ✔, dav1d ✔, fontconfig ✔, freetype ✔, frei0r ✔, gnutls ✔, lame ✔, libass ✔, libbluray ✔, librist ✔, libsoxr ✔, libvidstab ✔, libvmaf ✔, libvorbis ✔, libvpx ✔, opencore-amr ✔, openjpeg ✔, opus ✔, rav1e ✔, rubberband ✔, sdl2 ✔, snappy ✔, speex ✔, srt ✔, tesseract ✔, theora ✔, webp ✔, x264 ✔, x265 ✔, xvid ✔, xz ✔, zeromq ✔, zimg ✔ > > Michael > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org <mailto:ffmpeg-user@ffmpeg.org> > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > <https://ffmpeg.org/mailman/listinfo/ffmpeg-user> > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org <mailto:ffmpeg-user-requ...@ffmpeg.org> with > subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".