[FFmpeg-devel] [PATCH] avfilter/src_movie: add various commands

[Muhammad Faiz]

On Wed, Feb 17, 2016 at 11:28 PM, Hendrik Leppkes <h.leppkes at gmail.com> wrote:
> On Wed, Feb 17, 2016 at 5:05 PM, Michael Niedermayer
> <michael at niedermayer.cc> wrote:
>> On Wed, Feb 17, 2016 at 04:58:31PM +0100, wm4 wrote:
>>> On Wed, 17 Feb 2016 22:55:47 +0700
>>> Muhammad Faiz <mfcc64 at gmail.com> wrote:
>>>
>>> > On Wed, Feb 17, 2016 at 10:20 PM, wm4 <nfxjfg at googlemail.com> wrote:
>>> > > On Wed, 17 Feb 2016 21:30:20 +0700
>>> > > Muhammad Faiz <mfcc64 at gmail.com> wrote:
>> [...]
>>> > >
>>> > > Possibly it happens to work for you because there are no filters with
>>> > > much buffering and you didn't try video.
>>> > >
>>> > I don't mean that it will be supported by all filters. On filters with
>>> > much buffering, probably there will be huge delay between seek command
>>> > and their new output pts (It is tolerable). On filters which assume linear
>>> > pts, probably it will fail.
>>>
>>> How is that even a reasonable argument?
>>>
>>> libavfilter already has enough "works in maybe 10% of all cases"
>>> solutions.
>>
>> mpeg* can contain discontinuities in the timestamps already without
>> any seeking
>>
>
> Just because there could be discontinuities in some formats doesn't
> mean there should be no proper handling of seeking and flushing.
> A seek requires a flush on all components involved, thats just the
> most basic logic.

The most common case when seek without flush is that
the output pts response to seek will be delayed.