On 07-08-2018 01:24 PM, Michael Koch wrote:
That's correct, at the beginning there is only one image temp.jpg
ffmpeg's image sequence demuxer, when not reading from a pipe, will
probe for sequence size at initialization, so if an image doesn't exist
at that stage, it won't be
Am 07.08.2018 um 09:54 schrieb Michael Koch:
F:\xxx>c:/ffmpeg/ffmpeg -i temp%4d.jpg -vf lutyuv="y=0.9*val"
-frames 10 -q:v 1 -start_number 1 temp%4d.jpg
FFmpeg does not edit files in-place. Input and output have to be
different.
Let's assume I have a complex filter with several inputs.
F:\xxx>c:/ffmpeg/ffmpeg -i temp%4d.jpg -vf lutyuv="y=0.9*val"
-frames 10 -q:v 1 -start_number 1 temp%4d.jpg
FFmpeg does not edit files in-place. Input and output have to be
different.
Input and output are different. Input starts with number 0, and output
starts with number 1.
On 07-08-2018 04:09 AM, Michael Koch wrote:
F:\xxx>c:/ffmpeg/ffmpeg -i temp%4d.jpg -vf lutyuv="y=0.9*val"
-frames 10 -q:v 1 -start_number 1 temp%4d.jpg
FFmpeg does not edit files in-place. Input and output have to be different.
Besides,
> Input #0, image2, from 'temp%4d.jpg':
>
luminance = 0.95 * luminance_in_last_frame; // exponential decay
I'm trying to do the following:
Read image temp.jpg, set luminance to 90%, write as temp0001.jpg
Read image temp0001.jpg, set luminance to 90%, write as temp0002.jpg
and so on in an iterative process, until 10 images are
Every time when the input becomes brighter than the last output frame,
the output is set to the input value. If input is below the last output
value, then exponential decay.
I have a timelapse video of the night sky with meteors. Each meteor is
visible only in one frame. I'd like to make them
Every time when the input becomes brighter than the last output frame,
the output is set to the input value. If input is below the last output
value, then exponential decay.
I have a timelapse video of the night sky with meteors. Each meteor is
visible only in one frame. I'd like to make them
On 8/5/18, Michael Koch wrote:
> Am 05.08.2018 um 15:42 schrieb Gyan Doshi:
>>
>>
>> On 05-08-2018 06:41 PM, Michael Koch wrote:
>>> I'd like to ask if it's possible to make an exponential decay effect
>>> with FFmpeg.
>>> Let's assume a pixel is fashing to luminance = 1 in just one frame.
>>>
Am 05.08.2018 um 15:42 schrieb Gyan Doshi:
On 05-08-2018 06:41 PM, Michael Koch wrote:
I'd like to ask if it's possible to make an exponential decay effect
with FFmpeg.
Let's assume a pixel is fashing to luminance = 1 in just one frame.
Then in the output video I'd like to have the pixel
On 05-08-2018 06:41 PM, Michael Koch wrote:
I'd like to ask if it's possible to make an exponential decay effect
with FFmpeg.
Let's assume a pixel is fashing to luminance = 1 in just one frame. Then
in the output video I'd like to have the pixel flashing to 1
immediately, followed by an
I'd like to ask if it's possible to make an exponential decay effect
with FFmpeg.
Let's assume a pixel is fashing to luminance = 1 in just one frame. Then
in the output video I'd like to have the pixel flashing to 1
immediately, followed by an exponential decay with a time constant of a
few
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