It leads to edge cutting in photos as well as the parts that are close to edges get stretched with bad impression. You can use Linear FOV feature with Timelapse Photo mode but it is not accessible with Timelapse video mode.
#Gopro fisheye 1080p#
It works only with 2.7k, 1080p and below that. Linear FOV mode cannot work with all frame rates and videos sizes. Once the lens distortion gets removed then images are directly saved to memory card.
#Gopro fisheye software#
If you switch to this mode while capturing your photos then the camera itself provides software level correction to fisheye distortion. GoPro Hero5 Black is developed with various latest shooting modes and Linear FOV mode is one of those.
The article below will provide you complete detail about the process of removing fisheye distortion. No matter whether you are shooting videos or working with photos, it is possible to remove fisheye distortion. But, in some situations, the fisheye look is really a strong disturbance for images/videos as the straight lines become bent and from central location frames gets oversized. One of the most popular features of GoPro devices is their wide angle look as it assists in generation of images with large FOV. The mask files look like this (remember, the size of mask is important for desired output so don’t just save these files).Īgain, I use the GoPro defaults for these, which I have made available to download in the fusion2sphere repo linked below: I apply a linear ramp within the first selection, white to black, flip and replicate for the other selection.īackmask.png and frontmask.png are the inverse of each other and the same dimensions as the equirectangular output. To work out the pixel blend width you can used the calculation (output width / 360)*5, e.g. I then create a centered rectangular selection of the blend width I want, must be less than the blend width used in fusion2sphere (which is currently 5 degrees). To generate them you need to know the 1/4 and 3/4 positions of the output equirectangular output video horizontally. You also need two blend mask files, one for the front, the other for the back. Note: I’ve also included files for photo mode that can be used if you want to turn GoPro Fusion fisheye images into a video, like described in this post.
The fusion2sphere repository has these pre-generated for each camera mode on the GoPro Fusion camera:
#Gopro fisheye how to#
These files tell ffmpeg how to map the fisheye onto an equirectangular projection. pgm (Portable Gray Map) files for each fisheye. Method 2: Using Fusion specific ffmpeg filters (recommended) It is possible to use ffmpeg filters to achieve a blend.
#Gopro fisheye series#
You can see why it is 5 degrees in our previous series on converting dual fisheye frames from the Fusion here. The blend zone is around 5 degrees (full photo width is 360 degrees). It is at these points we need to provide a blend. Some of this is due to overlapping pixels and slight variations in the field of view. Looking closely, you can the stitch lines as well as some duplicate pixels visible in both outputs (this one taken from the first stitched video): iv_fov : input vertical Field Of View, usually (bit not always) identical to ih_fov (as above).ih_fov : input horizontal Field Of View ( see our last post on GoPro field of view).dfisheye : double fisheye (rectangular image containing two spheres/fisheye).Ffmpeg -y -i GP0002-dualfisheye.MP4 -vf v360 =dfisheye:equirect:ih_fov =190:iv_fov =190 -c:v libx265 GP0002-equirectangular-noblend.mp4īreaking down the arguements passed to the video filter flag -vf:
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