[TV] North American Closed Captions (2 Viewers)

Sebastiii · January 21, 2015

I'm uploading old sample i have

cctest.ts :

cctest2.ts :

https://dl.dropboxusercontent.com/u/10536084/mp/CC/cctest.ts
https://dl.dropboxusercontent.com/u/10536084/mp/CC/cctest2.ts

RonD · January 21, 2015

The following google drive shared folder has 2 USA ATSC TV recording files. Both are noon news recorded with MePo and have Closed Captions about 110 MB each.

https://drive.google.com/folderview?id=0B6obBtGDaIXeWG1tZkphMHoxZkU&usp=sharing

Owlsroost · January 21, 2015

Thanks for the samples - I've probably got enough for now.

My version of CoreCC parser is now working OK in GraphStudio with one of the samples

mm1352000 · January 21, 2015

I feel a bit superfluous to this conversation... but I'm still very interested.

To be clear: are you thinking of extending Core CC to handle CC in h.264, or integrating Core CC's function into TsReader? ...or maybe it is both?

RonD · January 21, 2015

Also not sure what is the goal of this quest.

But with MePo 1.9 default LAV setup for codecs and using CoreCC for ATSC closed captions, works fine most of the time. But if I skip chapters, or skip forward/back 15, 30, 60 seconds, most of the time this works without a problem. But sometimes, maybe 1 in 20, I see a total MePo Client hang and have to use TaskManager to kill MePo. No obvious errors in any log files. If I use Msft DTD-DVD for the MPEG2 video codec, I never see problems with time-skip with CoreCC and ATSC closed captions.

Owlsroost · January 21, 2015

mm1352000 said:
I feel a bit superfluous to this conversation... but I'm still very interested.
To be clear: are you thinking of extending Core CC to handle CC in h.264, or integrating Core CC's function into TsReader? ...or maybe it is both?

Possibly 'both'.

I'm at the stage of 'how does it all work at the moment' before thinking about 'which way to go'

Adding H.264 capability to Core CC is likely to happen first.

(...and RonDs 1080i sample is crashing my current dev version of TsReader, so I think that problem is first on the list

- nothing to do with CC)

xvffx · January 22, 2015

Hi,
small TS recording is from MP 1.4 which has CC (ccextractor says so and seen it get exported) however in mediainfo says nothing about text stream 608 708.
note: 1080 MPEG4/H.264
Vff

fir3ma5t3r · January 26, 2015

Check this link below:

http://www.fridgefta.info/forums/showthread.php?tid=35901#axzz3Pw3Ex92f

Copy and Paste below

Apparently XBMC has never been able to display ATSC Closed Captioning. Apparently, this was primarily because ffmpeg did not have built-in support to decode ATSC closed captions. Applications like VLC, while using ffmpeg, have their own code to deal with this deficiency in ffmpeg.

It looks like (but I could be mistaken), as of ffmpeg 2.2 it may now support ATSC Closed Captioning:http://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavcodec/mpeg12dec.c

The following discussion is also informative: http://forum.xbmc.org/showthread.php?tid=144517

This is particularly important for the PVR function in North America, which currently cannot display closed captions in live TV or recordings of live TV.

https://drive.google.com/folderview?id=0B_x8BEhWfD7yNS1RWnpYMjJsczA&usp=sharing

http://forum.kodi.tv/showthread.php?tid=144517&page=9 (Jan 2015)

fir3ma5t3r · January 26, 2015

https://github.com/xbmc/xbmc/pull/6172 (cc support for H.264) (Jan 2015)

Owlsroost · January 29, 2015

Quick update - I've fixed the dev TsReader crash, so I've just started work on adding H.264 parsing support to Core CC (but it's early days, so don't expect anything quickly....)

[TV] North American Closed Captions (2 Viewers)

Sebastiii

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RonD

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Owlsroost

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mm1352000

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RonD

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xvffx

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