Comment on Is *arr stack a real Netflix replacement?

French75@slrpnk.net ⁨2⁩ ⁨days⁩ ago

You can’t watch media before it’s completely downloaded.

This is not true for just about any use case.

If you use *arr, you’ll likely use Plex or Jellyfin for a media server. That server will do progressive streaming. Netflix by contrast does dynamic adaptive progressive streaming.

Progressive streaming means that playback will start once your client has downloaded and buffered enough of the selected content from the server. The amount is typically a fairly small portion of the stream, like 10 seconds or so, though the specifics are left to the server and client configs.

Dynamic adaptive progressive streaming has a multiplicty of streams optimized for different devices, formats, and quality levels. This might be a few hundred copies of the same video asset, but in a few different codecs, a few different color encodings (ie HDR, SDR), and a quality ladder of maybe 10 steps ranging from low quality SD to moderate quality UHD (like maybe 300kbps at the low end, and 40Mbps at the high end. And these will be cached around the world for delivery efficiency. On playback, the client (player) will constantly test your network throughput in the background, and “seamlessly” adjust stream quality during playback to give you the best stream your network and client can support without stopping to rebuffer.

For example, if you’re on a 4K/HDR TV with Atmos sound, and great network throughput, you’ll get the highest quality HDR streams and Atmos audio. Conversely, if you’re on mobile that doesn’t support HDR and only stereo audio, you’ll get much more efficiently coded HD video (or maybe SD) and stereo audio streams that are more suited to playback on that device. It would be impractical (huge cost and minor benefit) to try to replicate dynamic adaptive streaming just for yourself.

In any case, even if you’re just pulling off a NAS, you shouldn’t need to wait for the entire file to download before you can start playback. If your files are properly coded, you should be able to do progressive streaming in just about any use case.

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