Cecil Westerhof via ffmpeg-user <[email protected]> writes:
> Cecil Westerhof via ffmpeg-user <[email protected]> writes:
>
>> Paul B Mahol <[email protected]> writes:
>>
>>> On Wed, Jun 29, 2022 at 10:05 AM Bouke / Videotoolshed <
>>> [email protected]> wrote:
>>>
>>>> On 29 Jun 2022, at 01:48, Cecil Westerhof via ffmpeg-user <
>>>> [email protected]> wrote:
>>>> >
>>>> >
>>>> > The background of the photo is white. Would it be possible to make
>>>> > that transparent? (So where there is white, I do not see white, but
>>>> > the video.)
>>>>
>>>> This is called Luma (or Luminance) key.
>>>>
>>>> Yes, it is possible, yes, it will be ugly unless you know what you are
>>>> doing, and IMHO, FFmpeg is not the tool for this.
>>>> (But someone recently mentioned a GUI for filters, that might help you big
>>>> time on this one.)
>>>>
>>>>
>>> Use colorkey filter, and set color as white.
>>
>> I will look it up.
>> I realise that I have a problem, because in some photos not only the
>> background is white. :'-(
>
> I tried the following:
> ffmpeg -y -ss 21:50 -to 23:20 -i 00007-00010.MTS -i Photos/output.jpg
> \
> -filter_complex
> '[1:v]colorkey=0xFFFFFF\:0.01[ckout];[0:v][ckout]overlay[out]' \
> -map '[out]'
> \
> -pix_fmt yuv420p -acodec copy -vcodec libx264 -preset veryfast
> -crf 26 \
> -t 30 greenScreen.mp4
>
> It really does not look that bad. (But in this photo there is no
> white.)
> It does take some time to be generated,
>
> I have two challenges:
> - There is no audio.
> - How do I merge the two filters? (The picture should only displayed
> for a short while.)
The problem of merging the two parts is solved:
ffmpeg -y -ss 21:50 -to 23:20 -i input.MTS -i Photos/output.jpg
\
-filter_complex "[0:v][1:v] overlay=10:10:enable='between(t, 5,
85)', \
colorkey=0xFFFFFF\:0.01[ckout];[0:v][ckout]overlay[out]" \
-map '[out]'
\
-pix_fmt yuv420p -c:a:0 copy -vcodec libx264 -preset veryfast -crf
26 \
-t 30 greenScreen.mp4
How can I get the audio into the output?
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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