Copying HEVC 4k@60 video to FS degrades quality

Number:rdar://46983545 Date Originated:12/30/18
Status:Closed Resolved:Yes
Product:Photos - Mac Product Version:4.0
Classification:Bug Reproducible:Yes

Copying a 4k@60 FPS video to the filesystem (the desktop, for example) causes the file size to be reduced and the codec to change to H.264. If I Airdrop the file from my iPhone X, it seems to stay in its original format, with a resulting file that's 3x as big and says it's still in HEVC when I view the info panel for the file.

Steps to Reproduce:
1. Record 4k@60 HEVC video on iPhone
2. In Photos settings on iPhone, make sure that "Transfer to Mac or PC" is set to "Keep Originals"
3. Airdrop the video to a Mac running Mojave
4. On the Mac, download the same video from the Photos app to somewhere on the Mac's filesystem
5. In Finder, view Info for both video files by highlighting them and pressing command+i

Note that the file downloaded from the photos app is smaller and is in H.264, rather than HEVC.

Expected Results:
Video downloaded from Photos should be in HEVC with no quality or file size reduction.

Actual Results:
Video downloaded from Photos (copied to desktop) is converted to H.264 and is 1/3 the size of what was AirDropped.

Mojave 10.14

iPhone Xs 64 GB
Late 2013 MacBook Pro with Nvidia 750m dedicated GPU


Response from Apple

This issue behaves as intended based on the following: Hold down Option+drag to export original to desktop/finder Please update your bug report to let us know if this is still an issue for you.

By kellerbryan19 at Jan. 8, 2019, 6:08 p.m. (reply...)

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