I ended up using the AVLinux distro, which has Kdenlive with Defish0r plugin. I could manually reach a somewhat acceptable result there.
I translated it into the ffmpeg filter like this: frei0r=defish0r:0.734|y|0.0|0.0|0.0|0.143|1.0|0.247,scale=960:-1 And in my ffmpeg script it looks like this /usr/local/bin/ffmpeg -y -ss 0.113403353664 -r 80 -i ./kamp_1/1.MP4 -t 3 -ss 0.0 -r 80 -i ./kamp_1/2.MP4 -t 3 -ss 0.0532033667281 -r 80 -i ./kamp_1/3.MP4 -t 3 -ss 0.0776444068048 -r 80 -i ./kamp_1/4.MP4 -t 3 -filter_complex "[0:v:0]frei0r=defish0r:0.734|y|0.0|0.0|0.0|0.143|1.0|0.247,scale=960:-1[V1];[1:v:0]frei0r=defish0r:0.734|y|0.0|0.0|0.0|0.143|1.0|0.247,scale=960:-1[V2];[2:v:0]frei0r=defish0r:0.734|y|0.0|0.0|0.0|0.143|1.0|0.247,scale=960:-1[V3];[3:v:0]frei0r=defish0r:0.734|y|0.0|0.0|0.0|0.143|1.0|0.247,scale=960:-1[V4];[V1]pad=iw*2:ih*2:0:0[BG1];[BG1][V2]overlay=960:0[BG2];[BG2][V3]overlay=0:540[BG3];[BG3][V4]overlay=960:540[OUT]" -c:v libx264 -pix_fmt yuv420p -preset ultrafast -tune fastdecode -tune zerolatency -map [OUT] -r 80 ./kamp_1/out.mp4 Jesper 2015-06-15 19:33 GMT+02:00 Jesper Taxbøl <jes...@taxboel.dk>: > I am working on straightening out a video from a GoPro4 shot with the > stock lens at 1080S setting. > > Example images uploaded here: > http://imgur.com/KYcZGTf,ILHUWBj,lserDt3,ruWKGhs,NVxtBv0,q3c6xpt,nieBLBX,QuwoMQp,1Uvzcbq,3DqczbP,jaxAQNF > > > I have made a python program where I try to tweak the lenscorrection > filter parameters, but with little luck so far. > > I have also tried finding the parameters using opencv via openframeworks, > but that does not work well either. I guess the method is more suited for > cameras with less distortion? > > I am currently looking at the frei0r filter extension defish0r. I have > made a small python script where i adjust parameters, but with little luck > so far as the tweak domain seams enormous. > > What is a practical approach to finding a good filter configuration? Is > there a killer tool that use the frei0r plugins so I can adjust the > parameters more easily. > > Kind regards > > Jesper > -- Jesper Taxbøl +45 61627501 _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user