24 replies to this topic

[Felix64]

Some time ago I noticed that where are no Video Picture on FTA TV channel

MIR HD from satellite ABS-2 75 E. This channel is transmited on DVB-S 11559V 22000 5/6

I am allways using OpenPli images on VU+ Zero and VU+ Zero 4K. This TV channel

is shown without any problems on different oher receivers such as Openbox S6 HD PVR or

Openbox S3 mini HD, but those receivers are not used with Enigma2.

There is another FTA TV cahnnel MIR24-HD from other frequence DVB-S2 11490V 7500 2/3

which also has Video Picture showing problem.  I am sure that this is ether Enigma2, Image OpenPli or VU+ receivers Bug problem.

How could this problem be solved? What is the couse of this?

[Pr2]

Can you try to start a timeshift (putting the channel on pause) wait a few seconds then playing back the timeshift to see if it then works? 

[betacentauri]

It’s a known problem. Some channels only work if you record them and watch then the recording. Or use time shifting.
If it’s a e2 bug or a bug in the Broadcom chipset or the broadcast is not 100% standards complaint I don’t know. Would be good if someone could test with a hisilicon box (eg hd60, h9,...) whether it works.

[Erik Slagter]

It’s a known problem. Some channels only work if you record them and watch then the recording. Or use time shifting.
If it’s a e2 bug or a bug in the Broadcom chipset or the broadcast is not 100% standards compliant I don’t know. Would be good if someone could test with a hisilicon box (eg hd60, h9,...) whether it works.

As far as I am concerned true. I can't imagine Broadcom making hardware that's not fully DVB compliant. I think the broadcasters don't know (or don't care about) the actual restrictions, test it with some random receiver and if it works, it's ok.

 

It's just like websites being "not supported by Firefox" which suggests it's Firefox fault, but actually it's Internet Explorer that's at fault for accepting all sorts of HTML non-compliant stuff and the web developers not caring for compliance and only testing with IE.

[Felix64]

Dear Pr2 and betacentauri, I turned timeshift by putting on pause, then waited and turned on play. Nothing happened. No Video.

Other receivers without Enigma2 such as Openbox have no problem with those tv channels.

Sadly I don't have other Enigma 2 receivers for tests.

I only have at the moment only VU+ Zero and VU+ Zero 4K.

[Felix64]

I tried to make record. Receiver said that there is no material for recording, but recording was made.

What is interesting receiver does not see the recording and I can't play recording with media player plugin.

So I puted recording to mu computer and was able to watch recording. Conclusion is as you said betacentauri those

channels from ABS-2 74.9E sattelite only work if you record them and watch then the recording with computer.

What I can say. It's a shame for wether VU+ receivers producer or Enigma2 writers.

[betacentauri]

We are quite sure that this is no e2 bug.

[jpuigs]

I can't receive ABS2 satellite from my location, but some time ago I found a problem like yours.

 

I have a DVB-T HD modulator, which gets signal from HDMI connection, and gives a DVB-T HD signal on VHF or UHF TV channel.

On the Encoder Web Interface, I can configure a lot of parameters, one of them is the Video Codec, and another one is GOP Mode.

 

If I use MPEG-2 codec, I can use both GOP modes, Open or Closed. No problem at all.

 

But If I use any of the H264 codec modes (4.0, 4.1, 4.2, 5.0, or 5.1), and Open GOP mode, the DVB-T output signal has no video picture in all enigma STB I have.

 

In order to have video signal in enigma STBs configuration has to be one of these:

- H264 codec and Closed GOP.

- MPEG-2 codec.

 

However, all TVs at home show video in all modes, no problem at all. 

 

So, maybe this MIR HD signal has this setting on their video signal encoder…..

Edited by jpuigs, 9 February 2019 - 19:10.

[littlesat]

When a service plays only in timeshift or recording means that something is incorrect with that transmissions... boxes that can play it may have audio synchronization issues

[Robinson]

I checked MIR HD on HD51 and there is no video either.

Recording does not work either.

Streaming to VLC works OK.

[jpuigs]

I'm sure that this problem is related to what I wrote yesterday, OPEN GOP Mode encoding.

If I record it when I have no picture on screen, this .ts saved file does NOT play on any enigma boxes I have.

Streaming works OK.

But If I play it on desktop PC, I have no problems at all using all video player programs , VLC (Videolan), DVBViewer, MPC-BE, Windows media player…….

So, are we sure it isn't an enigma problem ??

Besides, TS doctor says file is OK.

Edited by jpuigs, 10 February 2019 - 14:23.

[betacentauri]

Is open gop mode a standard dvb mode?
Open gop has something to do with video encoding, right? The video is decoded by the hardware. E2 only tells the hardware which codec (h264, h265, mpeg2,..) is used. Not more.

[jpuigs]

So, it seems that all hardware video decoders on enigma boxes are faulty.

Who tells the info which appears on second infobar (frontend data source is set to tuner) ?  enigma or hardware decoder ?

Look at the screenshots.

When I have no picture, no resolution appears, but codec appears correctly.

It's very strange that all TVs, all PCs, all mobile phones (and Tablet & mediaplayers) receive this video picture correctly, the only boxes in which we can't see it are on enigma boxes.

 

 encoding_mpeg2.jpg   290.5KB   2 downloads          encoding_h264_openGOP.jpg   84.24KB   2 downloads         encoding_h264_closedGOP.jpg   240.64KB   2 downloads

[ccs]

How about a usb tuner, many work in a non-enigma environment as well?

Edited by ccs, 10 February 2019 - 16:54.

[jpuigs]

The problem is not the tuner, Usb tuners work in Windows and Ubuntu, and same tuner doesn't on Enigma.

[ccs]

The problem is not the tuner, Usb tuners work in Windows and Ubuntu, and same tuner doesn't on Enigma.

That's what I was asking.

[Erik Slagter]

Open GOP is a phenomenon known for MPEG 2 encodings. All SoC's can play them no problems there. AVC and HEVC work in a different way but have a similar concept where not all intra frames are complete independent. It's all part of the standard and works well.

 

The problem with these transponders is not the encoding but the multiplexing, where constraints are violated.

[chk8210]

Hi,

 

I have similar problem with below channels:

Hi-Impact TV - 7 West 11033V

TVE Tanzania - 75 East 4005H

ABC TV - 75 East 3836V

Quest TV - 10 East 3862R

 

No picture on the TV screen, but if I stream it from STB to PC or Phone (VLC) the picture is OK.

I use OpenPLi 6.2 VU Zero, OpenPLi 7.0 Zero 4K

[LouisSmith]

I recently had the same problem, but what Pr2 suggested advised me.

[jpuigs]

Topaz 1 , at 21,5 East (BISS encrypted) , same problem.

Streaming works fine.

Watching live on STB ==> no picture.