ffmpegx fails when trying to burn in subtitles

[ammonkc]

I'm trying to burn subtitles in to the video files that I'm encoding for dvd, but it fails everytime when it trys to encode the audio and the audio stream ends up being about 10 minutes to long. The video that I need to burn is split into 2 files with 2 .srt subtitle files. This is the steps that I'm using:

1. use the "dvd mpeg2enc" preset
2. check "normalize audio" (this forces 2 separate streams for video/audio which DSP4 requires)
3. set the sub to "burn", load the .srt file
4. check decode with mencoder

But the process fails everytime at the end when it gets to the audio. I've tried doing a passthrough ac3 but the audio track always ends up way longer than the video. The video stream looks good with subtitles burned in, but I just can't get the audio to work with it.

What am I doing wrong? I need to author the dvd in DVD Studio Pro 4 because ffmpegx doesn't support multiple files for authoring dvds.

[meldavid]

You shouldn't need to hardcode subtitles into the video if you are going into DVD Studio Pro. Better to have it in a subtitle track so you can turn it on/off at will with your remote control, jut like retial DVDs.

If you have 2 .srt files you need to convert them first with a utility called TitleLab. You'll need to shift the timecode in the second .srt file so that it can be merged with the first file - otherwise they both start at 00:00:00.
The DVD Studio Pro subtitles that TitleLab exports are not actually 100% compatible yet.

You need to replace the line breaks with the pipe symbol. "|"
And you need to replace tabs with " , ".

Anyway, read this guide:
http://www.mpeg2works.com/phpBB2/viewtopic.php?t=341&view=next


Then it's just a matter of importing into DVD Studio Pro. It's prob. best to import the subtitles first into a subtitle track, before laying video files into video tracks as sometimes DVDSP will complain about timecodes not matching.


If you still have trouble, then I'd be willing to convert the subtitles for you, but you should give it a go first.


You say that the audio ends up being longer than the video. Are you converting between ntsc & pal formats by any chance? You may have to timestretch the audio if that's the case.

[meldavid]

If you are converting between ntsc & pal formats you have to timestretch the subtitles as well. TitleLab has the facility to do that.

[ammonkc]

Thanks, I normally do use titlelab or subtitler to convert the .srt to .stl and put it on a subtitle track in DVD Studio Pro. But I didn't know how to shift the time codes on the second .srt file. Thanks I'll try playing around with shifting the timecode and see if I can get it to work that way.