MHEG Captions
#31
TheMike post_id=2143 time=1617360149 user_id=924 Wrote:
mrwish post_id=1705 time=1617268223 user_id=1343 Wrote:I'm pretty sure there's at least one interactive application in that stream for the Spanish provider - there's a TV service in the mux which has multiple audio streams (each a Spanish radio station), with an MPEG2 video stream that just shows an animated graphic with the caption "Cargando" (loading).

On the very old Canal Satélite Digital DVB-S boxes (some of which are still in circulation in Spain as far as I know, considering the DVB-S MPEG2 hasn't yet been switched off!), a presumably MHW-based app loads that lets you switch between the radio stations. There are data PIDs associated with the service that presumably contain the carousel stuff for this. Would be interesting if that worked on an OnDigital box, even though unlikely I guess!

I will get a transponder dump of it for you.

Thank you for shedding some light on what the Movistar Cargando loop on Astra 19.2 is about!

For those that don't know, using a generic satellite receiver, you just get a continous loop of an "face". Once with a smiley at the end, then with a...
[Image: S11_10847_30102h.jpg]
Image: digitalbitrate.com

I've just been poking about in the provided dump and I pulled one application out at random (as I don't know what any of them do, so any will do), and the one I pulled out has an application name of "UPSELLING", which I assume means it's trying to get you up your subscription or pay for a service. Haven't looked at the others yet, so I don't know if they're all the same. Also, should really put this in the other thread, but as it's kinda relevant, I've not yet managed to get the ONdigital box to do anything with it (but I'll be trying some of the others to see if they're the same, and it might be partly due to me not knowing quite what I'm doing).
#32
TheMike post_id=2143 time=1617360149 user_id=924 Wrote:Thank you for shedding some light on what the Movistar Cargando loop on Astra 19.2 is about!

For those that don't know, using a generic satellite receiver, you just get a continous loop of an "face". Once with a smiley at the end, then with a...
[Image: S11_10847_30102h.jpg]
Image: digitalbitrate.com

That's the one! I think the idea is that on the (old and slow!) CSD receivers, that stream will show until the MHW app eventually loads. When I last used one of those boxes in the Canary Islands a few years back, I saw it used in that way for the EPG (Guía), which takes a pretty long while to load.

settopboxing post_id=2173 time=1617364836 user_id=1116 Wrote:I've just been poking about in the provided dump and I pulled one application out at random (as I don't know what any of them do, so any will do), and the one I pulled out has an application name of "UPSELLING", which I assume means it's trying to get you up your subscription or pay for a service. Haven't looked at the others yet, so I don't know if they're all the same. Also, should really put this in the other thread, but as it's kinda relevant, I've not yet managed to get the ONdigital box to do anything with it (but I'll be trying some of the others to see if they're the same, and it might be partly due to me not knowing quite what I'm doing).

Interesting, I would guess the upselling probably refers to trying to move remaining customers over to their IPTV service over fibre. Movistar have been pushing that hard over the last years, as FTTP has rolled out across Spain. At least for now it remains on satellite to probe!
#33
As memory serves, wasn't a creative use of MHEG in the early Freeview days with adult channels?

As the boxes had no cams or card slots, I seem to remember the adult channel would load and be masked by MHEG and would unmask after a code was put in, you got from a subscription phone call.. Or did they just launch MHEG and the correct code would send you to the correct PID for the video(not sure MHEG could do that or not).

Not very secure, but presumably good enough for most viewers.

Anyone remember/know the details?
#34
simpfeld post_id=8415 time=1619042606 user_id=1526 Wrote:As memory serves, wasn't a creative use of MHEG in the early Freeview days with adult channels?

As the boxes had no cams or card slots, I seem to remember the adult channel would load and be masked by MHEG and would unmask after a code was put in, you got from a subscription phone call.. Or did they just launch MHEG and the correct code would send you to the correct PID for the video(not sure MHEG could do that or not).

Not very secure, but presumably good enough for most viewers.

Anyone remember/know the details?

Indeed, Adam "Major Malfunction" Laurie has done several hacking conference talks including mentions/explanations about this, so these videos might be of interest (they all cover similar subject matter from slightly different perspectives). Not very explicit (they're on YouTube after all), but probably best not to watch them in polite company:

Relevant timestamp of the first video is 9:27, which begins the discussion of this topic by referencing the second video listed in this post (which appears to be age restricted), but goes on to summarise the process. In case you're unable to see the DEFCON talk he mentions, or if you want a brief explanation rather than a whole talk, this is probably the one you want:

https://www.youtube.com/watch?v=Tx8wM_1Kx0A

https://www.youtube.com/watch?v=LOta5kwOr4k

Edit: Moved this one down here as it's a related talk, but doesn't contain the relevant stuff about MHEG-5 PPV:

https://www.youtube.com/watch?v=as8eqYa7vGc
#35
Lewis post_id=706 time=1617047396 user_id=1064 Wrote:Oh wow! Thank you [mention]settopboxing[/mention] and [mention]Flooski[/mention]!
I understand!

https://imgur.com/kxwyBHY
For the local generation, from what I've pieced together (very basically) this is what happens:

1. Reads the yellow section of different elements and their locations, draws them on screen
2. Downloads the font and points the text elements to use that when drawn
3.Reads the palette (orange) to fill the colours of the elements
4. Reads the green section, works out which elements are links and what they do when activated

I invite you to correct me!

[size=50]Source: http://mheg5.net/down/class.pdf[/size]
By any chance do you do work in software - a dev or a product manager? Your diagram especially reminds me of where I work. Smile - not wanting any specifics (that would be strange)
<t>When I finally decided to get involved.. I was consistent</t>
#36
TheMightyTRex post_id=8494 time=1619106980 user_id=1275 Wrote:
Lewis post_id=706 time=1617047396 user_id=1064 Wrote:Oh wow! Thank you [mention]settopboxing[/mention] and [mention]Flooski[/mention]!
I understand!

https://imgur.com/kxwyBHY
For the local generation, from what I've pieced together (very basically) this is what happens:

1. Reads the yellow section of different elements and their locations, draws them on screen
2. Downloads the font and points the text elements to use that when drawn
3.Reads the palette (orange) to fill the colours of the elements
4. Reads the green section, works out which elements are links and what they do when activated

I invite you to correct me!

[size=50]Source: http://mheg5.net/down/class.pdf[/size]
By any chance do you do work in software - a dev or a product manager? Your diagram especially reminds me of where I work. Smile - not wanting any specifics (that would be strange)

I don't! I sourced the diagram from http://mheg5.net/down/class.pdf - which might make sense of why it reminds you of work; it's a "genuine technical flowchart" (for lack of better phrase) Smile


Forum Jump:


Users browsing this thread: 1 Guest(s)
Powered by MyBB, © 2002-2026 MyBB Group. Theme designed by m0ckingbird © 2015-2026.