[FFmpeg-devel] [PATCH] avfilter: add rawdump filter

Hendrik Leppkes h.leppkes at gmail.com
Wed Jul 10 14:12:52 EEST 2019


On Wed, Jul 10, 2019 at 12:13 PM Fu, Linjie <linjie.fu at intel.com> wrote:
>
> > -----Original Message-----
> > From: ffmpeg-devel [mailto:ffmpeg-devel-bounces at ffmpeg.org] On Behalf
> > Of Paul B Mahol
> > Sent: Wednesday, July 10, 2019 15:55
> > To: FFmpeg development discussions and patches <ffmpeg-
> > devel at ffmpeg.org>
> > Cc: Eoff, Ullysses A <ullysses.a.eoff at intel.com>
> > Subject: Re: [FFmpeg-devel] [PATCH] avfilter: add rawdump filter
> >
> > On 7/10/19, U. Artie Eoff <ullysses.a.eoff at intel.com> wrote:
> > > This filter enables raw frames to be dumped to a
> > > file before they are sent through the auto-inserted
> > > scaler filter and useful when you want unscaled
> > > raw frames in an output file.
> > >
> >
> > Why?
> >
> > -f rawvideo doesn't work for you?
>
> unscaled raw video could be dumped through this filter in resolution changing cases.
>
> IMHO, it will be great if there are some options available to disable/enable the auto scaling filter
> in pipeline, thus the whole stream doesn't need to be scaled into the same size of the first frame.
> The difference in scale algorithms will make it hard to compare the output with other decoder.
>

I believe using -reinit_filter 0 with ffmpeg can achieve such a
result., as long as you make sure all filtering done (preferably none)
is capable of on-the-fly changes.

- Hendrik


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