On 2/11/2018 9:31 AM, wm4 wrote: > On Fri, 9 Feb 2018 18:43:11 +0000 > Mujib Haider <muj...@xilinx.com> wrote: > >> Dear ffmpeg-devel, >> >> I have a general question about the capabilities of avfilter. >> >> Is it possible to send meta-data between avfilters? Specifically, I want to >> create a filter to take a single input image, and produce a single output >> image along with metadata which encodes information about the image. > > Currently only via the fields AVFrames provides. There's > AVFrame.metadata, and also new side data types could be added for > important enough things.
There's also AVFrame.side_data if the metadata he has in mind is not an AVDictionary. This is apparently what vf_mestimate does to propagate motion vectors. New AVFrameSideDataType entries can be added if reasonable and useful, assuming what he needs is not already defined. Maybe even AVFrame.private_ref to store a pointer to some buffer, i think, but using it requires some changes so the field is guaranteed to be NULL before ownership of the frame leaves avfilter. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
