On 7/31/20, Zong, Wei <wei.z...@intel.com> wrote: > Thank you for the comments on this patch, I want to make some explanation on > your comments. > > 1. the purpose of this patch > We got some requirements from users who are trying libxcam stitching or > developers who showing interests. Many of them want an easy way to construct > an end 2 end pipeline of high quality immersive media application. > The key points are high resolution and low latency, FFMpeg provides high > quality video codec framework, if we implement video stitching as a video > filter in FFMpeg, > they will get benefits. > > 2. 3rd party dependency > The functions exposed by xcam filter only depends on essential build > tool-chain. > According to hardware configuration, user can get performance improvement by > install OCL, GLES or Vulkan. > These libraries are not necessary for video stitching, user can build a CPU > version without these libraries. > Beside these, stitching and DVS function depend on feature match > algorithm from OpenCV library to get better quality, I posted demo link in > commit message. > User can run stitching without install OpenCV, the side effect is the > quality will decrease. > > 3. Immersive media standard > Normally the camera manufactures provide video stitching software, they > defined private camera calibration parameters, these are very critical to > stitching quality. I know MPEG is making proposal on transfer these > meta-data in video stream, this will help compose immersive media on cloud > or edge server. I think it's a good idea to > create such a video filter in FFMpeg pipeline. > > 4. Why not implement stitching inside FFMpeg video filter > The algorithms are complexity and the performance are also important, > the stitching function manage computing resource for example thread > handling, image data block dispatching. Personally I think we don't need to > construct a wheel from the beginning.
Number of supported pixel formats are rather very low. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
