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Old 26-01-2018, 15:39   #31
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Re: Mpeg4

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Originally Posted by Raider999 View Post
Thanks for the reply - however I am now confused as other posts have suggested that Mpeg4 recordings will use considerably less space. This is what makes me think quality may be compromised.
Thats the progress of video compression.

MPEG2 is the dinosaur of its world, MP4 (x264) gives the same quality for less space.
Even thats out of date now, HEVC (x265) gives the same quality for even less space (up to 50% less in many cases).
The problem with HEVC is that many devices are not capable of decoding it properly yet.
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Old 26-01-2018, 16:48   #32
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Re: Mpeg4

Was looking for this, having noticed a massive speed blast at 3rd step of FF (Tivo, not V6)
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Old 26-01-2018, 19:03   #33
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Re: Mpeg4

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Originally Posted by Paul M View Post
The problem with HEVC is that many devices are not capable of decoding it properly yet.
It needs the hardware to support it so you can't just download a firmware upgrade for most devices. Unfortunately our smart TV has no upgrade so we're stuck with x264 for playing downloaded content.

The file size reduction is quite impressive.
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Old 26-01-2018, 19:17   #34
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Re: Mpeg4

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Originally Posted by heero_yuy View Post
It needs the hardware to support it so you can't just download a firmware upgrade for most devices. Unfortunately our smart TV has no upgrade so we're stuck with x264 for playing downloaded content.

The file size reduction is quite impressive.
Compression is getting better and better all the time
https://www.broadbandtvnews.com/2017...perseus-codec/
http://www.bbc.co.uk/news/av/technol...worth-watching

Last edited by muppetman11; 26-01-2018 at 19:21.
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Old 27-01-2018, 12:23   #35
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Re: Mpeg4

Looks like there are a few issues cropping up on the Community forum.

Some VHD & V+HD customers reporting their HD channels at reverting to 4:3 aspect & they cant change it.
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Old 27-01-2018, 12:34   #36
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Re: Mpeg4

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Originally Posted by nodrogd View Post
Looks like there are a few issues cropping up on the Community forum.

Some VHD & V+HD customers reporting their HD channels at reverting to 4:3 aspect & they cant change it.
Maybe it's a ploy to get them to change over to a V6?
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Old 27-01-2018, 13:00   #37
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Re: Mpeg4

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Originally Posted by muppetman11 View Post
The only issue with those codecs, i assume, is the broadcaster would have to buy a license to use it.

No such problems with an open source codec.

Aren't broadcasters moving away from the Dolby sound codec for TruSurround for options that don't require a license?
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Old 27-01-2018, 13:22   #38
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Re: Mpeg4

Sky bought a minority stake in V-Nova and uses it in Italy wonder whether that's why the dishless Sky Q option will firstly roll out in Italy.

6-10 Mbps for UHD is impressive.

Last edited by muppetman11; 27-01-2018 at 13:55.
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Old 27-01-2018, 13:48   #39
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Re: Mpeg4

V6 rollout will most likely be partly in order to shift everything to MPEG4 (and maybe HEVC) so that there's capacity for more channels per MUX, freeing up MUXes for higher bandwidth broadband offerings.
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Old 01-02-2018, 10:50   #40
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Re: Mpeg4

Probably a very basic question (so apologies in advance) but this format change only applies to recorded files, not "live" broadcasts. In other words, nothing has changed on live tv...
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Old 01-02-2018, 10:58   #41
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Re: Mpeg4

Quote:
Quote from bolgerp:


Probably a very basic question (so apologies in advance) but this format change only applies to recorded files, not "live" broadcasts. In other words, nothing has changed on live tv...
It's the encoding of the actual streams from the headend. That's why they're keen to swap out all the boxes that will not support it.

That more efficient encoding will allow for better bit rates on some channels if they choose and more overall capacity elsewhere.
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Old 01-02-2018, 11:17   #42
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Re: Mpeg4

Hope the fix this fast forward bug, and it is a bug. There is no good reason why it couldn't be 2x speed as before with MPEG2.
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Old 01-02-2018, 11:27   #43
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Re: Mpeg4

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Originally Posted by bolgerp View Post
Probably a very basic question (so apologies in advance) but this format change only applies to recorded files, not "live" broadcasts. In other words, nothing has changed on live tv...
The transmission is encoded in MPEG4. The box records the transmission as recieved (bitrate, encoding etc).
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Old 01-02-2018, 11:46   #44
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Re: Mpeg4

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Originally Posted by nodrogd View Post
The transmission is encoded in MPEG4. The box records the transmission as recieved (bitrate, encoding etc).
Ah ha... thanks guys. I wonder if this is why I have noticed a slight change in picture quality on Standard Definition channels recently. Do we know when these changes took effect?
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Old 01-02-2018, 12:35   #45
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Re: Mpeg4

SD channels haven't changed - it's only on the HD channels
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