[FFmpeg-user] concat demuxer filter_complex (fade)

[Paul B Mahol]

On 4/15/20, Mark Filipak <markfilipak.windows+ffmpeg at gmail.com> wrote:
> On 04/14/2020 02:40 PM, Ted Park wrote:
>> Hi,
>>
>> The filter is not in the version of ffmpeg you are using, you will need to
>> get a more recent version for it to be there. Try downloading a recent
>> static build from the website or try compiling it yourself. (It's not in
>> any release version as far as I can tell)
>>
>> Regards,
>> Ted Park
>
> May I suggest that the most expeditious thing to do is to simply address the
> original question? I
> would do it myself if I only had a brain... a heart... the nerve.
>

Original approach is very fragile and extremely complicated to work with.

>
> On 04/14/2020 09:43 AM, atticus via ffmpeg-user wrote:
>  > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>  > On Tuesday, April 14, 2020 11:07 AM, Paul B Mahol <onemda at gmail.com>
> wrote:
>  >>> I thought about this yesterday and came up with something like this:
>  >>> ffmpeg -i in.JPG -filter_complex "[0:0]loop=loop=-1:start=0:size=100
>  >>> [looped] ; [looped] trim=start=0:end=10 [trimmed] ; [trimmed]
>  >>> fade=type=in:start_frame=0:duration=3:color=black [fadeIn]" -map
> [fadeIn]
>  >>> -c:v h264 -r 60 out.mkv
>  >>> or this
>  >>> ffmpeg -loop 1 -i in.JPG -filter_complex "[0:0] trim=start=0:end=200
>  >>> [trimmed] ; [trimmed] fade=type=in:start_frame=0:duration=3:color=black
>  >>> [fadeIn]" -map [fadeIn] -c:v h264 out2.mkv
>  >>> (I'd just have to add a concat filter to the filter chain and an audio
>  >>> stream). I'm just not quite sure if there is a more smart way to do
> this
>  >>> (which for example would be a bit faster, since this is (in my opinion
> a bit
>  >>> slow for just duplicating a single frame). Well is there a smarter
> and/or
>  >>> faster way?
>  >>> And can you recommend which of these two commands above might be the
> better
>  >>> one?
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