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how to correct wrong broadcasting aspect mode ?


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#1 jpuigs

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Posted 20 May 2015 - 20:55

If a TV channel is broadcasting in 16:9 mode, but pictures (source) are really in 4:3 format, how can I correct it ? (wide faces)

A good example is Vintage TV at 28 East. It's always in 16:9, but a lot of videos are 4:3

 

By playing with /proc/stb/video/aspect and /proc/stb/video/policy values, I can correct the opposite case (if a channel broadcasts in 4:3 and picture is really 16:9).

Any ideas ?

(AspectRatioSwitch Plugin doesn't help.)

 

I would need to do a Pillarbox to a 16:9 broadcast.


Edited by jpuigs, 20 May 2015 - 20:58.

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Re: how to correct wrong broadcasting aspect mode ? #2 littlesat

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Posted 20 May 2015 - 22:59

Call the provider to correct it?

Edited by littlesat, 20 May 2015 - 22:59.

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Re: how to correct wrong broadcasting aspect mode ? #3 jpuigs

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Posted 20 May 2015 - 23:43

B)


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Re: how to correct wrong broadcasting aspect mode ? #4 Erik Slagter

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Posted 21 May 2015 - 14:01

It's a driver/hardware thing. Enigma isn't involved.


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Re: how to correct wrong broadcasting aspect mode ? #5 Pr2

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Posted 21 May 2015 - 14:14

Or a broadcaster sending the wrong info?


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Re: how to correct wrong broadcasting aspect mode ? #6 Rob van der Does

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Posted 21 May 2015 - 14:31

Triggered by this post I've been watching a lot on Vintage-TV today, but I haven't seen one singe wrong aspect ratio (no 'wide faces').

Edited by Rob van der Does, 21 May 2015 - 14:34.


Re: how to correct wrong broadcasting aspect mode ? #7 jpuigs

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Posted 21 May 2015 - 19:18

I've just been watching it.

 

Look at the screenshots....

 

channel's real 16:9 broadcast  Attached File  vintage_16_9_wrong.jpg   66.23KB   5 downloads

 

 

what should be (resized to 4:3 by me !) Attached File  vintage_4_3_right.jpg   127.29KB   4 downloads

 

 

 

 

 

 


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Re: how to correct wrong broadcasting aspect mode ? #8 jpuigs

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Posted 21 May 2015 - 19:24

Another one:

 

wrong : Attached File  vintage_16_9_wrong2.jpg   52.14KB   4 downloads

 

resized by me :  Attached File  vintage_4_3_right2.jpg   105.24KB   5 downloads

 

 

 

Just in case somebody may think I'm wrong, here are the technical details for this channel, where you can see it has widescreen flag enabled.

 

Attached File  vintage_details.jpg   217.74KB   3 downloads

 


Edited by jpuigs, 21 May 2015 - 19:27.

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Re: how to correct wrong broadcasting aspect mode ? #9 Rob van der Does

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Posted 21 May 2015 - 19:40

The service itself is absolutely 16:9, no doubt about that. But in itself that shouldn't be a problem, as long as it is broadcasted in pillerbox (when the real aspect ratio of the contents in 4:3).
Your example does show incorrect AR indeed. IMHO it is broadcasted as such; nothing a receiver can do about this.

Re: how to correct wrong broadcasting aspect mode ? #10 jpuigs

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Posted 21 May 2015 - 20:13

Yes, exactly.

As I said in my first post, I would need to do a Pillarbox to a 16:9 broadcast

 

I just asked if it was possible to fix it, because of course we are able to fix the inverse situation, a channel with widescreen picture, but 4:3 signal.

 

It would be good to change something that the receiver thought signal was 4:3, and made pillarbox.


Edited by jpuigs, 21 May 2015 - 20:17.

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Re: how to correct wrong broadcasting aspect mode ? #11 Robinson

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Posted 21 May 2015 - 22:21

1. Do you expect the receiver to correct such things automatically by itself?

2. What did you do to resize (correct) the picture?


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Re: how to correct wrong broadcasting aspect mode ? #12 jpuigs

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Posted 22 May 2015 - 07:40

1 - No.  The receiver does what it's told to do.: 16:9 signal ? ==> set widescreen mode.

 

2 - I resized on PC.


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Re: how to correct wrong broadcasting aspect mode ? #13 Robinson

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Posted 22 May 2015 - 08:23

Why don't you use aspect ratio switch plugin?


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Re: how to correct wrong broadcasting aspect mode ? #14 jpuigs

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Posted 22 May 2015 - 08:45

It doesn't work.

It would work in the opposite case, 16:9 picture transmitted in 4:3

If you read my fisrt post, (AspectRatioSwitch Plugin doesn't help.)


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Re: how to correct wrong broadcasting aspect mode ? #15 jpuigs

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Posted 22 May 2015 - 08:52

This *problem* is usually visible too in some arabic channels on BADR and Nile which make HD versions upscaled  from SD 4:3 sources.


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Re: how to correct wrong broadcasting aspect mode ? #16 doglover

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Posted 22 May 2015 - 09:52

This problem has been visible on several channels from CD or TVV in the past.  The only solution which helped has been complaining to the service provider until they set the flags correctly.

 

Yes of course, you can each time switch your TV to the correct mode, and switch it back when you change the channel.  But this is not the action you want.

 

Willy


Edited by doglover, 22 May 2015 - 09:55.

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Re: how to correct wrong broadcasting aspect mode ? #17 Erik Slagter

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Posted 24 May 2015 - 09:41

It's a driver/hardware thing. Enigma isn't involved.

 

Apparently it needs to be repeated a few times.


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Re: how to correct wrong broadcasting aspect mode ? #18 Rob van der Does

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Posted 24 May 2015 - 13:01

It's a driver/hardware thing. Enigma isn't involved.

 
Apparently it needs to be repeated a few times.

In fact there is no hardware/driver issue here.
When a service has a 16:9 ratio the hardware/driver is not going to look into the contents to see if that's actually 16:9 or 4:3 (if that would even be possible).
A 16:9 service is simply displayed as 16:9 as it should.
As has been said above: the only one who can correct this is the service-provider.

Re: how to correct wrong broadcasting aspect mode ? #19 malakudi

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Posted 24 May 2015 - 14:21

Of course it could be fixed in STB drivers. As we have "just scale", the driver could also support "enforce 4:3". Unfortunately no STB driver supports such a feature.

In PC software (like VLC) you can enforce any aspect ratio you like.



Re: how to correct wrong broadcasting aspect mode ? #20 Rob van der Does

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Posted 24 May 2015 - 14:29

I think no STB-manufacturer expects a service-provider to make this kind of mistakes.


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