On Fri, Jul 12, 2024 at 4:04 AM Jimmie <plust...@gmail.com> wrote: > Hi, > > I'm currently working on a project about Equi-Angular Cubemap (EAC). > > I need to sample an EAC texture but couldn't find one readily available. > After some googling, I found that FFmpeg could be used to convert > other 360 pictures to EAC, so I gave it a try. > > The input is an equirectangular texture with 3000x1500 resolution and > the output is an EAC texture with a standard 3x2 format, as expected. > > What confuses me is that the EAC texture has a resolution of 3000x1688. > To my understanding, EAC is just a special case of cubemap, which should > consist of six square faces. Apparently, that is not the case for this > output. > > Can anyone help me understand why the output EAC texture does not have > square faces as in regular cubemaps? Thank you! >
https://paulbourke.net/panorama/youtubeformat/ > > Alex > > Command: ffmpeg -i pond.jpg -vf v360=e:eac eac.png > The log is as below. > > ffmpeg version 7.0.1-essentials_build-www.gyan.dev Copyright (c) > 2000-2024 the FFmpeg developers > built with gcc 13.2.0 (Rev5, Built by MSYS2 project) > configuration: --enable-gpl --enable-version3 --enable-static > --disable-w32threads --disable-autodetect --enable-fontconfig > --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp > --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt > --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 > --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid > --enable-libaom --enable-libopenjpeg --enable-libvpx > --enable-mediafoundation --enable-libass --enable-libfreetype > --enable-libfribidi --enable-libharfbuzz --enable-libvidstab > --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm > --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va > --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc > --enable-vaapi --enable-libgme --enable-libopenmpt > --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora > --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb > --enable-libopus --enable-libspeex --enable-libvorbis > --enable-librubberband > libavutil 59. 8.100 / 59. 8.100 > libavcodec 61. 3.100 / 61. 3.100 > libavformat 61. 1.100 / 61. 1.100 > libavdevice 61. 1.100 / 61. 1.100 > libavfilter 10. 1.100 / 10. 1.100 > libswscale 8. 1.100 / 8. 1.100 > libswresample 5. 1.100 / 5. 1.100 > libpostproc 58. 1.100 / 58. 1.100 > Input #0, image2, from 'pond.jpg': > Duration: 00:00:00.04, start: 0.000000, bitrate: 154676 kb/s > Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, > bt470bg/unknown/unknown), 3000x1500 [SAR 240:240 DAR 2:1], 25 fps, 25 > tbr, 25 tbn > Stream mapping: > Stream #0:0 -> #0:0 (mjpeg (native) -> png (native)) > Press [q] to stop, [?] for help > [swscaler @ 000002ad6cac5540] deprecated pixel format used, make sure > you did set range correctly > Last message repeated 3 times > Output #0, image2, to 'eac.png': > Metadata: > encoder : Lavf61.1.100 > Stream #0:0: Video: png, rgb24(pc, gbr/unknown/unknown, > progressive), 3000x1688 [SAR 1:1 DAR 375:211], q=2-31, 200 kb/s, 25 > fps, 25 tbn > Metadata: > encoder : Lavc61.3.100 png > [image2 @ 000002ad6cc35fc0] The specified filename 'eac.png' does not > contain an image sequence pattern or a pattern is invalid. > [image2 @ 000002ad6cc35fc0] Use a pattern such as %03d for an image > sequence or use the -update option (with -frames:v 1 if needed) to > write a single image. > [out#0/image2 @ 000002ad6c9e0040] video:9207KiB audio:0KiB > subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: > unknown > frame= 1 fps=0.0 q=-0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A > speed=0.0467x > _______________________________________________ > 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".
