Thanks, Paul. I'll give it a test. On 6 August 2017 at 21:26, Paul B Mahol <[email protected]> wrote:
> On 8/6/17, Evert Vorster <[email protected]> wrote: > > 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. > > FFmpeg can read tif format just fine last time I checked. > > > > > 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". > _______________________________________________ > 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". -- 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".
