[FFmpeg-devel] [PATCH] lavfi: add inverse telecine filter

Michael Niedermayer michaelni at gmx.at
Mon Mar 23 13:40:38 CET 2015

On Mon, Mar 23, 2015 at 11:54:17AM +0000, Kieran Kunhya wrote:
> > why does the filter not use the input pts?
> Michael, none of the PTS hacks will ever work - (inverse)telecine is a
> CFR operation.
> It inherently requires knowing the duration of the frame and in VFR
> mode you don't know it.

Kieran, the material used in testing is CFR to the best of my knowedge
the material does not start at pts 0, the code ignores the start time
aka the first pts. Theres only one possibility to fix this and that is
to use the first pts, no (de)telecine operation can maintain sync
with another stream like an audio stream if it modifies the
start time

What you talk about sounds like turning VFR into CFR 
this is not what i am talking about

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Complexity theory is the science of finding the exact solution to an
approximation. Benchmarking OTOH is finding an approximation of the exact
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 181 bytes
Desc: Digital signature
URL: <https://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20150323/b9959682/attachment.asc>

More information about the ffmpeg-devel mailing list