Hi there. I have been able to use ffmpeg to convert dual fisheye samsung gear 360 footage to equirectangular footage with ffmpeg.
The example program given in the manual does an OK job of what the remap filter is capable of, however to really get the best from it the .pgm maps needs to be created with something that takes lens chataristics into account. Passing the -c parameter to Panotool's nona generates the required translation maps in .tif format, and then it's a doddle to convert to .pgm with ImageMagick. Is there a way to update the manual a little for other people who wants to folow in my footsteps? For the curious, here is the contents of the script that I use. -------------------------------------------------------------------------------------- #!/bin/bash #This will split, defish, blend and re-assemble Samsung Gear 360 video map_dir="/data/Projects/RemapFilter" ffmpeg -y -i "$1" \ -i $map_dir/lx.pgm -i $map_dir/ly.pgm -loop 1 \ -i $map_dir/Alpha-Map.png \ -i $map_dir/rx.pgm -i $map_dir/ry.pgm \ -c:v hevc_nvenc -rc constqp -qp 26 -cq 26 \ -filter_complex \ "[0:v]eq=contrast=0.8:brightness=-0.01:gamma=0.7:saturation=0.8[bright]; \ [bright]split=2[in1][in2]; \ [in1]crop=in_w/2:in_h:0:in_h[l_crop];\ [in2]crop=in_w/2:in_h:in_w/2:in_h[r_crop]; \ [3]alphaextract[alf]; \ [l_crop]vignette=angle=PI/4.6:mode=backward[l_vignette]; \ [l_vignette][1][2]remap[l_remap]; \ [r_crop]vignette=angle=PI/4.8:mode=backward[r_vignette]; \ [r_vignette][4][5]remap[r_remap]; \ [l_remap]crop=in_w:1920:0:(in_h-1920)/2[l_rm_crop]; \ [r_remap]crop=in_w:1920:0:(in_h-1920)/2[r_rm_crop]; \ [l_rm_crop][alf]alphamerge[l_rm_crop_a]; \ [l_rm_crop_a]split=2[l_rm_crop1][l_rm_crop2]; \ [l_rm_crop1]crop=in_w/2:in_h:0:0[l_rm_crop_l]; \ [l_rm_crop2]crop=in_w/2:in_h:in_w/2:0[l_rm_crop_r]; \ [0:v][r_rm_crop]overlay=(1920-(2028/2)):0[ov1]; \ [ov1][l_rm_crop_l]overlay=((1920+2028/2)-(2028-1920)):0[ov2]; \ [ov2][l_rm_crop_r]overlay=0:0[out]" \ -map [out] -map 0:a "$1_Remapped.mp4" -------------------------------------------------------------------------------------------- I hope this helps somebody. Kind regards -- Evert Vorster Isometrix Acquistion Superchief _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
