I was about to post a new topic, but my issue is exactly the same as the OP (just a different NAS model). I can't understand why HEVC is "not supported" in Synology Photos. Its omission is a major usability issue as both iPhone and Android phones exclusively use HEVC for recording high quality video. Refusing to support a standard that rivals Apple and Google have settled on is as silly as not supporting .jpg or .mp3. Most video editing software also encodes anything 1080p or over in HEVC.
Back to the point, the fact that the same videos play in Video Station, as well as directly from File Station (Action > Play > opens in a new browser tab with a player that looks like the one from Video Station) tells me:
- It's not a hardware limitation of the NAS.
- (at least not for any of the + models)
- It's not that Firefox, Chrome, and Edge on Windows 10 don't support HEVC.
- (but interestingly Mac uses say that Safari CAN play HEVC directly from Syn Photos)
- It's not that Synology doesn't have a license for the HEVC codec in DSM.
- (Unless there's something about Photos that requires a different license? Hard to imagine and not an excuse.)
I've spent several hours searching and those three points keep coming up, but unfortunately they don't answer the question as to why Photos can't simply open HEVC videos in the player that File Station uses, or offer to open them it in a different app on the client machine (like their Android Photos app does - in fact Synology recommends MX Video).
Granted, HEVC videos don't play at Original Quality - that option is greyed out and the best you get is "High Bitrate FHD" at 30fps even if the original is 4K 60 fps. But they do play without buffering and are watchable for a quick preview. Maybe Synology thought the quality wasn't good enough to include it in Photos, but hopefully software updates can improve the quality and even as it is it is still way better than not playing them at all.
For now, I'm going to shift to looking for a workaround for browsing videos from Windows, and possibly installing alternative software on the NAS. I use digiKam to import and organize photos and it's also good for browsing/searching directly from the NAS, but it needs to open videos in an external app to play them smoothly. On the plus side, with the
DS720+ I can open 4K videos straight from the File Explorer or digiKam and the play find in VLC, where my old NAS couldn't do that without buffering.
According to the
datasheet for the OP's RS1219+, it has an Intel Atom C2538 quad-core 2.4GHz processor, for which cpubenchmark.net gives a CPU mark of 960 (the DS720+'s Celeron J4125 scores 3,021). That may not be enough for transcoding on the fly, but you can try opening videos from File Station and see what it gives you.