@benjojo doesn't DOCSIS also use MPEG TS packets to encapsulate and deliver IP packets?

@benjojo @__michaelg ive heard it said that watching your digital cable subscription on your PC via your cable internet provider back then was basically MPEG2-over-IP-over-MPEG2 😅

@benjojo @__michaelg 👍 i guess the "modern" variant of this is how hls, dash etc uses mpegts, mp4, webm segments over http :)

@benjojo It's probably because the MPEG system stream was originally designed as as a protocol, sort of, rather than as a format, and is still widely used as a protocol.

@benjojo File formats are protocols!

@filippo @benjojo ... in the space domain rather than the time domain

(credit to a friend of ours for that observation)

@benjojo I did lots of work with mpeg 2 transport streams during the big DTV conversion in North America. We had a sample file that had IP packets within it. I think when we used one decoding software program, the packets were attempted to be sent over the Internet when we were testing. I wondered if that might be used for DRM, but it’s not likely.
MPEG 4 files that I dealt with were mostly not designed for transport. We were seeing some mpeg 2 streams starting to use MPEG 4 video.

@benjojo tshark -T json | jq '...' to debug mp4 files was partially how https://github.com/wader/fq got started :)

@benjojo “It’s packets all the way down.”

@benjojo But can it play it? I know it can play RTP streams, so it seems plausible.

@benjojo If only I knew this when I was working on an mp4 demuxer...