On 04-04-2019 02:37 AM, Michael Niedermayer wrote:
doc/ffmpeg.texi | 5 +++++
fftools/ffmpeg.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
fftools/ffmpeg.h | 3 +++
fftools/ffmpeg_opt.c | 5 +++++
4 files changed, 58 insertions(+), 2 deletions(-)
71a87fe4d8f2efa73a3d2d9845e7aabfb75edce5
0001-ffmpeg-add-drop_deviant_frames-option.patch
From f39e3d44e1cb8108592d2241e2251d8e1506e031 Mon Sep 17 00:00:00 2001
From: Gyan Doshi <ffm...@gyani.pro>
Date: Mon, 25 Mar 2019 22:01:07 +0530
Subject: [PATCH] ffmpeg: add -drop_deviant_frames option
Decoded frames with changed parameters in inputs expected to be uniform
may indicate malformed/corrupted packets. Demuxer with flag discardcorrupt
set may not catch all such packets and neither may decoders with err_detect
flags set.
Upon parameter change, AVFilterLink of any filters receiving such frames has
to be reconfigured, destroying existing filter context. In case of a
change in audio sample rate, timestamps can go haywire, potentially
leaving the output stream to be "truncated".
Added option allows users to avoid sending such deviant frames onwards.
Default behaviour remains unchanged.
---
doc/ffmpeg.texi | 5 +++++
fftools/ffmpeg.c | 47 ++++++++++++++++++++++++++++++++++++++++++--
fftools/ffmpeg.h | 3 +++
fftools/ffmpeg_opt.c | 5 +++++
4 files changed, 58 insertions(+), 2 deletions(-)
Would it make sense to make this feature available to other applications ?
The awnser here has an effect of the design because
For example if this is implemented in
libavcodec or libavfilter then other applications could
use such a feature. While if its in ffmpeg then other applications could
not.
Could be a useful addition to libavcodec, since not all users may onward
process using libavfilter.
Looks like avcodec_receive_frame is the place to add this gate.
Gyan
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