On Fri, Feb 7, 2025 at 2:31 PM Devlist Archive <devl...@rlb.org> wrote:
>
> >
> > The cc_fifo mechanism is actually implemented within the various
> > filters which change the framerate (deinterlacing, framerate
> > conversion, interlacing), so no extra command line arguments are
> > required.  There are some edge cases though that don't properly handle
> > it, and those mainly relate to cases such as the captions crossing
> > back/forth between SEI and dedicated caption tracks (e.g. MP4 with a
> > caption track, the subcc output, etc).
> >
>
> Ok, based on this information I am going to make a bug report ticket for
> the particular type of mp4 files I am using because while some caption data
> is passed, it is garbled and the transcoding process is producing errors.
> I was not aware that some work had been done to try to solve the frame rate
> conversion issue already as the behaviour of ffmpeg implies that it doesn't
> try to compensate for those changes for the file types I am working with.
> There are also bugs in the subcc function that seem to be affecting display
> time and other metadata.
>
> I assume that it would be more efficient and better to fix the existing 608
> only data path before trying to expand things to include 708?
>
> Zach

One thing worth noting is that the filenames in that Google drive
don't match up with the example commands you've provided.  I would
recommend if you decide to open a ticket to either rename the files or
change the commands so whoever tries to reproduce the issue knows they
are working with the exact same files.

Devin

-- 
Devin Heitmueller, Senior Software Engineer
LTN Global Communications
o: +1 (301) 363-1001
w: https://ltnglobal.com  e: devin.heitmuel...@ltnglobal.com
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