On Thu, Jul 20, 2017 at 11:19 PM, Nicolas George <geo...@nsup.org> wrote:
> Hi. > > Le duodi 2 thermidor, an CCXXV, Paras Chadha a écrit : > > + size = abs(header->bitpix) >> 3; > > > + size *= header->naxisn[i]; > > Can you explain why PCOUNT and GCOUNT are not taken into account here > while they are taken into account in the demuxer? > It is because for image extensions, PCOUNT = 0 and GCOUNT = 1 are mandatory in the header according to the standard. These keywords are not even mandatory in the header of first image. Anyways as i have told before, it is not necessary FITS file will contain an image always. It is a general data storage and transport format too. It supports various extensions - ASCII table extension and binary table extension that are used to store and transport data. After that there is something called Random Groups structure which is also used for the same purpose. PCOUNT and GCOUNT can affect the size of data in those extensions. In demuxer, i am skipping over these extensions and only sending the images to the decoder. So, these keywords are taken into account in demuxer but not in decoder. > > Regards, > > -- > Nicolas George > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
