Duplicate lines from DVB Teletext on certain channels #213

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opened 2026-01-29 16:38:14 +00:00 by claunia · 0 comments
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Originally created by @Vindictor on GitHub (Dec 8, 2016).

Hi there,
I wasn't sure whether to start a new thread, or add this to #427 as it sounds like a similar issue, but is nothing to do with iTunes.

Anyway, I've mentioned in other threads how delighted I am with CCExtractor when it's provided with teletext from my Astra 28.2E (UK satellite) TvHeadend source. Usually I get perfect results, including different colour text when different people are talking. Great!

However, I've noticed that when recording from the channel ITVHD I get triple duplicate lines for all text. This results in flickering on playback. I've attached an .srt for one I made last night, and can also provide the file I pulled these from, here

https://drive.google.com/file/d/0B03VrTibH96ma3dPazdhSXotdjQ/view?usp=sharing

I don't have this issue with other DVB-S HD channels I've tried, just ITVHD.

HOWEVER:
If I remux this .ts file with MKVTOOLNIX it will create an .srt text subtitle track in the resulting .mkv file without any line duplication. I can provide any .ts file with teletext subs into MKVTOOLNIX and it will create .srt subs in the remuxed file, but it loses colour information, so I prefer to use CCExtractor first, and then remux to MKV using CCExtractor's .srt output. But at least I can extract usable subs :)

Thanks for reading.

srt.zip

Originally created by @Vindictor on GitHub (Dec 8, 2016). Hi there, I wasn't sure whether to start a new thread, or add this to #427 as it sounds like a similar issue, but is nothing to do with iTunes. Anyway, I've mentioned in other threads how delighted I am with CCExtractor when it's provided with teletext from my Astra 28.2E (UK satellite) TvHeadend source. Usually I get perfect results, including different colour text when different people are talking. Great! However, I've noticed that when recording from the channel ITVHD I get triple duplicate lines for all text. This results in flickering on playback. I've attached an .srt for one I made last night, and can also provide the file I pulled these from, here https://drive.google.com/file/d/0B03VrTibH96ma3dPazdhSXotdjQ/view?usp=sharing I don't have this issue with other DVB-S HD channels I've tried, just ITVHD. **HOWEVER:** If I remux this .ts file with MKVTOOLNIX it will create an .srt text subtitle track in the resulting .mkv file without any line duplication. I can provide any .ts file with teletext subs into MKVTOOLNIX and it will create .srt subs in the remuxed file, but it loses colour information, so I prefer to use CCExtractor first, and then remux to MKV using CCExtractor's .srt output. But at least I can extract usable subs :) Thanks for reading. [srt.zip](https://github.com/CCExtractor/ccextractor/files/638952/srt.zip)
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Reference: starred/ccextractor#213