On Fri, 20 Feb 2015, Nicholas Robbins wrote:
Let me know if it works. I only knew about it because I added it. I'm
glad someone else is using it too.
It looks like it works... at least in terms of adding only the forced
subtitles.
But, there are a couple problems with the resulting video, in particular
it's less then half the size of the original (6557837312 -> 2745004032)
and the "bitrate" went from "6621 kb/s" in the original video down to
"2771 kb/s" in the forced-subs copy.
I'm assuming some of that is because the original contains 5 audio streams
and 9 subtitle streams and the copy only contains 1 audio stream and 1
subtitle stream overlayed onto the video stream. But it seems hard to
believe removing 4 audio streams and 8 subtitle streams reduces the
size/bitrate by that much.
The other problem is once it's transferred to my DVR it plays fine at
normal speed, but if I fast forward, then stop, it skips ahead several
minutes. The original video (w/o subs) doesn't have this issue.
My goal is to add the hard/forced subs with as little change to the video
stream as possible. If something like this were possible, I'd do it:
$ ffmpeg -forced_subs_only 1 -i video.vob -filter_complex "[0:v][0:s]overlay"
-c copy -f vob video.mpg
I know I can't do that (I tried), just trying to emphasize I'd like the
resulting video to be as close to the original as possible with the
addition of the hard/forced subs.
If the video issues are unrelated to the overlay subtitle options and
outside the scope of my current thread, I'll be glad to start a new
thread.
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