[FFmpeg-devel] Repetition of previous frame after loss of current frame

Hardik Sharma hardik.sharma22 at yahoo.com
Wed Nov 9 01:28:28 CET 2011

Thanks. frame copy concealment should work by default after frame drop, right? Because during my experiments when I am dropping B slices which sometimes means whole B frame, it is not enabling frame copy as I am getting only 299/300 frames. Is there any way to enable it or should I report it as a bug? Let me know.  

From: Michael Niedermayer <michaelni at gmx.at>
To: FFmpeg development discussions and patches <ffmpeg-devel at ffmpeg.org>
Sent: Monday, 7 November 2011 6:47 PM
Subject: Re: [FFmpeg-devel] Repetition of previous frame after loss of current frame

On Sun, Nov 06, 2011 at 10:31:51AM -0800, Hardik Sharma wrote:
> To copy previous reference frame, there is a function in logavfilter->avfilter.c->avfilter_start_frame. Does anyone know about this function? Is there any frame copy or frame interpolation concealment available in ffmpeg for whole frame loss? Please let me know. Thanks.   

completely lost frames are handled ultimately by ffmpeg.c duplicating
the previous frames. when the output format cannot handle frames of
variable duration

We also have some interpolation concealment for B frames in

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