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I have the same problem using xbmc, tvheadend..
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Do you encounter the same issue when playing files or dvd? There was a change in mainline recently which touched subtitle rendering. I don't think this is pvr related.
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No, I have this problem only with one channel.
Is there a way to watch the subtitle independently (gimp?), perhaps it's the channel provider witch give this quality.
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edit : sorry, wrong thread !
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Would you have a recording of this channel for me to duplicate this problem?
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Unfortunately, I can't give you a sample. If I record the channel with tvheadend, the subs are not displayed during replay (it's a known bug of matroska container). And if I record the channel with vdr (.ts), the subs are correctly displayed in xbmc during replay.
When I watch closely, it seems there is an inversion between lines :
1 2 3 4 5 6 ... become 2 1 4 3 6 5
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Is the problematic channel available on Astra?
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Yes, 19.2°E Astra 1H. The channel is TF1 HD.
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I tried showtime and the subtitles rendering is buggy too.
It's not a xbmc issue.
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More infos on this issue :
Since I added ts container support for recording (tvheadend), when I watch the record within xbmc, the subtitles work.
I think the problem is in the exchange protocol. Some infos are lost and xbmc is unable to render subtitles correctly or at all (with some channel, I have this issue, for some others, I have no subtitles at all).
I tested with vnsi and it's the same think.
Regards.
Note: ts container support is just a record of the raw data of a specific dvb program with a pmt and a pat added at the start of the file. xbmc does all the job !