The word streaming can relate to different technologies from different manufacturers in different scenarios and in this short article we are going to take a little tour of what it all means.
When streaming video to the consumer you often see HLS DASH & CMAF mentioned.
HLS is HTTP Live Streaming
Dynamic Adaptive Streaming over HTTP
CMAF Common media application format (MPEG-A #19)
These are all adaptive streaming technologies that chop a stream into chunks and encode at different bitrates to squeak the video down the standards web server port in your domestic router.
The goal is to hide as much of the technology as possible from the consumer so they don't know about MP4 or Transport Stream or bitrates or latency or the fact the ads are coming from a different server on the other side of the planet.
Next up we have General Purpose Video over IP solutions that might also use the consumer oriented protocols but often include extra protocols on a local area network that can be made more permissive about port usage, these might be
RTSP Real Time Streaming Protocol - for control
RTMP Ream Time Messaging Protocol - another control protocol
and Multicast broadcasts to get one signal to multiple destinations without duplication
Next we have a bunch of point to point and mesh streaming tools that are often used in speciality applications where you need better quality or lower latency or different resolutions from a single encode.
Now we start to see more protocols appearing like
HDBaseT - HDMI + USB + Ethernet over IP
IGMP - Internet Group Management Protocol
SDN - software defined networking
And lastly we have protocols that cope with very high bandwidth uncompressed content for pristine productions
NMOS - Networked Media Open Specifications
ST 2022 - High bitrate including uncompressed over IP
ST 2059 - Precision Time Protocol
ST 2110 - component media transport protocols from SMPTE
So there is a lot of streaming out there to meet every need. Not all the solutions
interoperate, so it's worth doing a little homework to make sure the solution fits
your need. Get in touch with KitPlus if you want a quick deep dive on any of these topics
Built by Hollyland and costing around £600 the Mars 400S is an easy-to-use wireless video transmitter/receiver system – it will be right up the alley of anyone who, like me, considers an instruction manual to be nothing more than box padding.
Read Phils Full review here, and link to the video review.
The exponential growth of video supercharged a technological revolution that began in the early noughties with the advent of DSLR cameras.
The cinematic-style shallow depth of field image video quality from DSLRs was a revelation, but, back then audio was the big drawback. As demand has grown so the technology has improved and today’s one-man-band small rig set ups can capture pretty good sound into a DSLR style camera.
Phil Vinter reviews the latest release from HOLLYLAND and it's a thumbs up from us.
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