This topic

BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Thu, 30 Jun 2022 18:14:35 GMT

There is a repeatable bug on the BT Pro Box, HDMI Frame rate matching causes all freeview to be output in 60hz instead of 50hz

How to replicate the bug :

With HDMI Frame rate matching set to off

1. Tune to any channel on Freeview. The picture is output at 50hz correctly, matching the broadcast refresh rate

2. Set HDMI Frame Rate matching to on.

3. Return to the picture and it remains at 50hz

4. Put the box into standby

5. Take the box out of standby, the freeeview picture is then output incorrectly at 60hz. The picture then remains at 60hz unless you switch HDMI frame rate matching off.

A 50hz picture output at 60hz is really quite an unpleasant experience at best, on most televisions, and disconcerting on all televisions.

Is this bug known about?

I suggest keeping frame rate matching off until this is fixed.

However, although I haven't explicitly checked, I have a feeling there is another circumstance with frame rate matching off that can cause the box to inexplicably switch to 60hz. As I've noticed the stutter on a number of occasions, but not in a way that's repeatable like the above example.

I did a search and notice something similar has been reported on the youview forum, but to no response here (post 5) : https://community.youview.com/youview/discussion/7606943/bt-tv-box-pro-software-update-4-0-216-0-5-228

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

NeilO — Fri, 01 Jul 2022 11:09:06 GMT

Hi @expectingtofly welcome to the community and thanks for highlighting this, I'm sorry to see you're experiencing problems with your BT TV Pro box.

I've highlighted your post to our BT TV team, they'll try to replicate the bug and will raise a ticket to get this investigated further.

Thanks

Neil

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

MC22 — Sat, 02 Jul 2022 12:25:48 GMT

I hadn’t really noticed this issue until I read you post however, you are of course quite correct, my Pro Box exhibits the same behaviour. It’s clearly demonstrated when tuning to Sky News HD on 385 when the box has just come out of standby, the news ticker is quite choppy and my TV is indeed reporting a 60hz signal.

I’ve followed your advice and turned off HDMI Frame Rate Matching.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

Brucemeister5 — Sat, 02 Jul 2022 12:47:37 GMT

I can confirm that the issue identified by the OP exhibits itself on our Pro tv box too.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Sat, 02 Jul 2022 12:55:59 GMT

@MC22wrote:
I hadn’t really noticed this issue until I read you post however, you are of course quite correct, my Pro Box exhibits the same behaviour. It’s clearly demonstrated when tuning to Sky News HD on 385 when the box has just come out of standby, the news ticker is quite choppy and my TV is indeed reporting a 60hz signal.

I’ve followed your advice and turned off HDMI Frame Rate Matching.

Unfortunately, I fear the bug is worse than just affecting HDMI frame rate matching setting. I've noticed even with HDMI Frame rate matching off, the picture is in 50hz, but there is something slightly wrong with the cadence, plus there are intermittent dropped frames. (It's most notable when watching sports) I've been trying to put my finger on what it is. I really believe that what this box is doing is natively outputting standard 50hz content as 60hz then converting back to 50hz!

I know that sounds weird, and I obviously can't prove it, but I think turning on the HDMI Frame rate matching is giving us that clue, by removing the veneer of it's 50hz back conversion. I really hope that isn't the case, and I'm mistaken, but I'm really becoming very sure of it.

Hopefully as the actual 60hz output of 50hz bug is easily reproducible the whole problem will be addressed.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Tue, 12 Jul 2022 07:27:48 GMT

Hi @NeilO

Please can you confirm that this incorrect frame rate bug has been acknowledged and a fix is coming?

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Wed, 27 Jul 2022 07:13:07 GMT

This bug is still present in the latest firmware. @NeilO please can you confirm that this bug has been acknowledged and will be addressed. Many thanks.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

DanielS — Wed, 27 Jul 2022 12:21:59 GMT

Hi @expectingtofly,

Thanks for posting up today.

I am sorry that this appears to be ongoing. Originally, when Neil reported this, our BT TV team opened a bug ticket to investigate. I've reached out to them to get an update for you.

Thanks
DanielS

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Sat, 06 Aug 2022 12:09:56 GMT

For the record, this appears to now be "fixed". Although there has been no communication on acknowledging the bug or stating that there was a fix.

With HDMI Frame Rate Matching set to on, all content is output at 50hz, apart from the Amazon Prime app, which seems to be the only app that honours the match frame rate setting. (Incidentally, the Netflix app is back to outputting in 50hz, which as most of their content is 24hz, makes the output very stuttery, ironically)

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

Brucemeister5 — Sun, 07 Aug 2022 07:39:31 GMT

Whatever may have happened appears to have been undone again on my box. When I bring it out of standby I need to turn the frame rate matching off and on again to restore it to 50 hz.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Sun, 07 Aug 2022 10:41:17 GMT

@Brucemeister5wrote:
Whatever may have happened appears to have been undone again on my box. When I bring it out of standby I need to turn the frame rate matching off and on again to restore it to 50 hz.

That's interesting, I coudn't may it go into 60hz at all on match frame rate (even when I wanted it to on Netflix for example)

Of course we have had no acknowledgement or communication on the status of this issue of this at all. @DanielS & @NeilO please can you provide a status of this issue and if it has been/will be addressed. Thank you.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

Brucemeister5 — Sun, 07 Aug 2022 11:09:19 GMT

Just to clarify, the issue did appear to have been resolved on my box yesterday too, but it’s reverted to defaulting to 60hz when I bring it out of standby again now.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Sun, 07 Aug 2022 11:21:51 GMT

@Brucemeister5wrote:
Just to clarify, the issue did appear to have been resolved on my box yesterday too, but it’s reverted to defaulting to 60hz when I bring it out of standby again now.

Oh yes!, how bizarre. The bug has returned for me too! I've no idea what is going on. @DanielS & @NeilO please can we have an update on this issue. Thank you.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

SoupDragon57 — Tue, 23 Aug 2022 19:41:19 GMT

I seen to get this whenever we've been watching an app (either a film or US content), then when you return to watching TV, The frame rate is out.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

expectingtofly — Mon, 29 Aug 2022 09:35:49 GMT

This bug is still present in the latest release.

How to recreate :

1. Switch on HDMI frame rate matching

2. Go into standby, come out of standby.

3. All live tv content is then in 60hz instead of 50hz with all the associated juddering.

There must be an awful lot of people out there watching an awful juddery picture without realising what caused it.

Please can it be confirmed that this bug has been acknowledged and will be fixed (I've asked quite few times now, thanks)

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

SoupDragon57 — Mon, 29 Aug 2022 20:23:48 GMT

@expectingtofly I've turned off frame rate matching for now. Just goes wrong too often.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

BillyM — Sat, 18 Mar 2023 14:58:08 GMT

@SoupDragon57 @expectingtofly @Brucemeister5

Interested to hear from you if the latest update announced on the Youview forum BT TV Box Pro Software Update 4.1.22 / 0.7.82 has made any difference to this bug?

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

SoupDragon57 — Sun, 19 Mar 2023 10:59:36 GMT

@BillyM Still seems broken to me. Netflix still doesn't support frame rate matching. When I viewed a programme on Amazon Prime Video at 24 FPS / 23Hz, normal TV then also played at this rate. When switching too another device and back to BT TV (including coming back out of standby), my amp said it was now at 59Hz. Only turning off frame rate matching restored the correct frame rate.

I am running 4.1.22 / 0.7.82.

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

SoupDragon57 — Sat, 02 Mar 2024 09:22:37 GMT

Does anyone know if this bug has been fixed yet?

Re: BT Pro Box Frame Rate Match Bug - Always 60hz when frame rate matching is on.

SoupDragon57 — Sat, 02 Mar 2024 11:59:36 GMT

Just tested it using firmware 4.2.124 (224d71)/0.9.218 - still has all the same issues. Is this going to get fixed?