VLC is a great software, but there's one behaviour I don't understand:
When creating mkv-Files from DVB-S2 HD recordings, while preserving the subtitles, sometimes the resulting mkv-Files don't start playing video at zero seconds, but instead only after some seconds. MPlayer doesn't show this behaviour.
I have attached a sample file.
1. Can you reproduced this behaviour with the sample file?
2. Why does VLC act this way?
3. What can I do to get VLC to play this immediately?
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Thanks for your reply and testing, Baldrick!
I haven't searched/asked there yet, but I'll do.
MPCHC shows the same 3 second delay. I used MkvToolnix-gui to remux the audio and video (no subs) from the original MKV into a new MKV file and that new file shows the same 3 second delay in VLC, but not MPCHC.
I demuxed the h264, ac3, idx, and sub tracks with MkvExtractGui, then muxed them back together with MkvToolnix-gui. Both VLC and MPCHC played the new video without the 3 second delay. But the subs were 3 seconds behind the video. So I muxed the elementary streams again, adding a -3000 ms delay to the subtitles. VLC now plays the video right away with the subs at the right time.
Last edited by jagabo; 29th Dec 2015 at 18:50.
ffmpeg to directly produce a .mkv-Container out of the .ts-file I get from recording digital satellite television (DVB-S/DVB-S2).
For subtitles i use the "-scodec dvdsub" option ffmpeg provides. It transforms the DVB bitmap subtitles to DVD bitmap subtitles.
In other cases I can only use teletext subtitles.
In the specific recording this topic is about I recorded the french channel W9 HD and tried my usual ffmpeg-approach. While there was no error message the result had an issue: The subtitles weren't at the right position of the HD picture, instead the subtitles were at a position in the upper left part of the picture, where I would expect them if the frame had an SDTV resolution.
Because of this bug(?) I had to use Project X for subtitles this time and not ffmpeg's "-scodec dvdsub" option.
This surely isn't an answer to your question, but I though this information could be relevant. I haven't checked whether subtitles overlap when using ffmpeg's "-scodec dvdsub" option.