> 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? > Did not tried yet as I never needed to do stitching. > > > >> output: >> https://nextcloud.denispolec.de/index.php/s/8yF7rKdnB9HdJsa < >> https://nextcloud.denispolec.de/index.php/s/8yF7rKdnB9HdJsa> >> zoomed: >> https://nextcloud.denispolec.de/index.php/s/fwdapyA8aGBdC2M < >> https://nextcloud.denispolec.de/index.php/s/fwdapyA8aGBdC2M> >> >> Thanks! >> >> All the best, >> denis >> _______________________________________________ >> 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". >> > _______________________________________________ > 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". _______________________________________________ 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".