v4.12.1 - Closed Caption not working anymore



Closed Caption has always work fine and correctly with mp4 files.
Forced Subtitles were shown perfekt.
When in container was "marked correctly", what to play (forced/with subtitle with witch audiotrack - on ipad and apple tv works great and perfekt.

In the new 4.12.1 forced subtitles are not more shown. please rollback to old slection/funktion !!!


Plex will fix this or how i can go back to 4.12 ?

This is really a update with a big issue. Why they change this -((


This is a major breakage for me as well.


We're looking into this issue, sorry for the inconvenience!


Are there any news?


It seems the fix needs some work on the server side. We hope the server team can tackle it soon!


Really ?

Before, the App works fine. I only updated the ios App - NOT the Server.

In the Releasenotes was:

Version 4.12.1 is now available.
- Closed captions could be enabled incorrectly.

Now, there is a Problem - before never...


Correct. I'm running server 1.5x and I have many DVR recordings for which the Apple TV version can play captions but the iOS version no longer can.

I'm quite deaf and not having captions available on my iPad puts significant restrictions on when I can watch these recordings. This needs to be fixed...


Interestingly, I took a fresh recording (using server 1.5x), played on my iPhone with no captions, and then Airplayed it to my Apple TV, where the captions showed up. Clearly the iPhone app is doing some parsing of the captions, but just failing to get them properly displayed.

Is there any word on this? This is a major concern for me since I do a lot of watching on iOS.


Sorry, I didn't meant it was a server problem only, the issue is on both sides. We're working on it and hope to have a fix soon :/

Sorry for the inconvenience! :s


Hello Plexteam,

this is now 2 Month ago !
You really wan't to fix this?
I am German user. A lot of Movies have here Closed Caption.
This Caption are not shown any more. On ios and also on Apple TV.

When we can get an working update or is there a way to go back to last working version ?

Normally I like Plex - but the support is really bad at this point.


A fix is on its way, it just turned out to be a bit more difficult than we anticipated.

Thanks for your patience.


Can I take it this means captions labeled as EIA-608 will display correctly?


For me, i speak about the native Apple Quicktime format (mp4/m4v)

My Wife and Children has the Version 4.12 on their Tablet. -> Works perfekt !
Always the Subs are displayed, like configured in the MP4 Header.

i wait long for an Update, but with the today new v4.16 NO! subtitles are shown. And with IOS i have no chance to go back in the plex version.
This feature has worked for 2 Years without problems and has stopped working with Version v4.13.
Also the AppleTV App. No Subtitles with Version 1.12. In Children Rooms with Vesion 1.11 no Problems.

I am really angry about this. I only wan't back something that works 2 Years without problems !

This is a container that is not working...:

Video #1
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 h 39 min
Bit rate : 2 776 kb/s
Width : 1 280 pixels
Height : 534 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Variable
Frame rate : 23.976 (24000/1001) FPS
Minimum frame rate : 23.810 FPS
Maximum frame rate : 24.390 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.169
Stream size : 1.92 GiB (77%)
Writing library : x264 core 148 r2708 86b7198
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Menus : 5,6

Video #2
ID : 6
Format : JPEG
Codec ID : jpeg
Duration : 1 h 39 min
Bit rate mode : Variable
Bit rate : 978 b/s
Width : 640 pixels
Height : 267 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Variable
Frame rate : 0.003 FPS
Minimum frame rate : 0.001 FPS
Maximum frame rate : 0.010 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Compression mode : Lossy
Bits/(Pixel*Frame) : 1.908
Stream size : 637 KiB (0%)
Default : No
Encoded date : UTC 2017-07-01 15:06:42
Tagged date : UTC 2017-07-01 15:06:42
Menu For : 1

Audio #1
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1 h 39 min
Source duration : 1 h 39 min
Bit rate mode : Variable
Nominal bit rate : 198 kb/s
Maximum bit rate : 317 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 spf)
Compression mode : Lossy
Source stream size : 140 MiB (5%)
Language : German
Default : Yes
Alternate group : 1
Encoded date : UTC 2017-07-01 15:02:28
Tagged date : UTC 2017-07-01 15:06:38
Fallback From : 3
Subtitles : 4

Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Format settings, Endianness : Big
Codec ID : ac-3
Duration : 1 h 39 min
Source duration : 1 h 39 min
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 spf)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 453 MiB (18%)
Source stream size : 453 MiB (18%)
Language : German
Service kind : Complete Main
Default : Inherited From: 2
Alternate group : 1
Encoded date : UTC 2017-07-01 15:02:28
Tagged date : UTC 2017-07-01 15:06:38
Fallback To : 2
Subtitles : 4

ID : 4
Format : Timed Text
Muxing mode : sbtl
Codec ID : tx3g
Duration : 1 h 29 min
Bit rate mode : Variable
Bit rate : 1 b/s
Stream size : 589 Bytes (0%)
Language : German
Default : Yes
Forced : Yes
Alternate group : 2
Encoded date : UTC 2017-07-01 15:02:28
Tagged date : UTC 2017-07-01 15:02:28
Subtitles For : 2,3


With today's iOS update, captions are now working for me again in Canada. This means, in turn, that the DVR and live TV features are useful to me again.

Thanks very much to the team for getting this fixed.


Apparently the ability to read captions encoded as EIA-608 is still unsupported. I'm disappointed.


What about EIA-608? The recent update fixes issue for CEA-708 (or EiA-708) not EiA-608

I thought I was able to watch some video that has this caption but no longer, it does tells me that I have this. PlexWeb does identify but does not show caption. On AppleTV, it is "off" I have to pull down to select "unknown cc" to turn on. The AppleTV setting have CC on. Although I am running TvOS 11beta


@ecantrell @mediajolt can you provide some sample files with EIA-608 we can test with?



Sorry, I didn't get this posting until now. How do you want me to provide the files?


Hopefully generating a short sample file (instructions here: https://support.plex.tv/hc/en-us/articles/201035968-Generating-Sample-Files-from-Media) with which you can reproduce the issue, and then send me the file (or a Dropbox/Google Drive link) via Private Message.

Thank you! :smiley: