• Features
  • -x MPO optimizes every image in an MPO losslessly and keeps the file an
    MPO. iPhone photos are MPOs that carry an HDR gain map.
  • A skipped image whose suffix names an enabled format it isn't, like an MPO
    named .jpeg, gets a warning that names the options that would take it.
• Fixes
  • -x MPO -c JPEG wrote JPEGs that still indexed the images it dropped, so
    some readers failed on them and picopt converted them again on every run.
    Running it again repairs those files.
  • -x MPO -c JPEG -D mozjpeg no longer adds a second XMP block.
  • Optimizing a JPEG no longer deletes the data appended after its image,
    like the gain map of an Android Ultra HDR photo or the video of a Google
    Motion Photo. An Ultra HDR photo's MP Index is rewritten to match, and a
    JPEG whose MP Index doesn't match its appended data is left unchanged.
• Changes
  • -x MPO -c JPEG keeps the first image of an MPO that tags no image as its
    primary, such as a stereoscopic MPO.
  • -D mozjpeg skips JPEGs instead of passing them through unchanged.
• Dep
  • Remove piexif.