On Mon, Jun 8, 2020 at 1:25 AM Michael Niedermayer <mich...@niedermayer.cc> wrote: > > On Sun, Jun 07, 2020 at 10:36:38PM +0530, Gautam Ramakrishnan wrote: > > Hi, > > > > I am trying to decode the p1_03.j2k reference file. However, while > > trying to use libopenjpeg instead of the native decoder, I get the > > following error, > > [libopenjpeg @ 0x55f249d7e180] Unable to determine pixel format. > > The exact command run was: > > ffmpeg -vcodec libopenjpeg -i p1_03.j2k -f framecrc p13 > > However this does not happen with all files. For example, > > p0_01.j2k decodes properly. How could I decode p1_o3.j2k with libopenjpeg? > > try opj_decompress > > also if it works for you (it seems here but i do not know if the output > is correct of course) then you can try to fix ffmpeg + libopenjpeg if > you like > The issue is that I am trying to implement PPM marker support. I want to compare for bit exactness between libopenjpeg and the native decoder. The colours usually look off sometimes while comparing the native output and libopenjpeg, whereas the outputs are bit-exact. (I am assuming as both use different colourspaces in the output). The shape of both images look similar, but the native decoder is giving a color image while opj_decompress gives a grayscale. Is there any way I can properly compare outputs of both programs? > thx > > [...] > -- > Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB > > Never trust a computer, one day, it may think you are the virus. -- Compn > _______________________________________________ > 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".
-- ------------- Gautam | _______________________________________________ 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".
