libopenjp2-tools binary package in openKylin Nile V2.0 loong64

 This package provides with command-line tools allowing for conversions between
 several formats and also provides tools for encoding and decoding
 motion-jpeg2000 video formats:
 .
  - opj_decompress: decodes j2k, jp2, and jpt files to pgm, ppm, pnm,
                  pgx, and bmp.
  - opj_compress: encodes pnm, pgm, pgx, bmp, and ppm files to j2k,
                  and jp2.
  - opj_dump: dump information contains in j2k and jp2.
  - index_create: create jp2 with JPIP index file from a j2k file.
  - frames_to_mj2: convert YUV video streams to mj2 format.
  - mj2_to_frames: convert mj2 video streams to YUV format.
  - wrap_j2k_in_mj2: wrap j2k codestreams into mj2 format.
  - extract-j2k-from_mj2: extract j2k codestreams from the mj2 format.

Source package