-f matroska \
- | \
ssh mbp '"'"'cat > "@".new'"'"''
+# TODO this cat generates an .mkv container with invalid timestamps or something else Jellyfin + HLS
+# can't understand. Requires reconstruction on the other side.
+# it's often re-encoded at >150x speed so it's not important, but maybe it should be piped to ffmpeg
+# on the other system automatically.
+# ffmpeg -i $out.mkv.new -map 0 -vcodec copy -acodec copy $out.mkv.new.mkv