When making a video from many pictures, is it possible to read in the
pictures in reverse order, beginning with the last picture?
If this is not possible, how can I rename the pictures automatically to
bring them in reverse order?
Thanks,
Michael
from GIMP ?
Thanks,
Michael
--
**
ASTRO ELECTRONIC Dipl.-Ing. Michael Koch
Raabestr. 43 37412 Herzberg
www.astro-electronic.de
Tel. +49 5521 854265
Michael, please stop "highjacking" threads. You are replying to emails
in the thread and changing the subject. This will a) make your emails
appear under other thread topics, and b) be seen as impolite.
Sorry, that wasn't intended. I've sent it again as a new email. I hope
it's correct now.
al’ Select
experimental scaling algorithm.
Wow, that sounds interesting, but what does it do?
Thanks,
Michael
--
**
ASTRO ELECTRONIC Dipl.-Ing. Michael Koch
Raabestr. 43 37412 Herzberg
www.astro-electronic.de
> That looks like the job for the filter, see inflate, deflate, erosion
and dilation filters.
I just tested the dilation filter. It's a nice workaround if the
downscaling factor is 3:1, as in my example. But if the downscaling
factor is smaller, for example from 5472x3648 to 900x600, which is
Hi,
I'm making a timelapse video from many JPG pictures, and I'd like to use
drawtext to print the time in each picture. Let's assume the pictures
were taken with 5 seconds interval. The following command works almost
as expected and prints the seconds modulo 60:
text=%%{e\:mod(5*n,60)}
60,60)\:'d'\:2}"\:"%%{eif\:mod(%S%+%I%*n,60)\:'d'\:2}:fontcolor=%COLOR%:boxcolor=%BOXCOLOR%:box=1:fontsize=%SIZE%:x=%POSITION_X%:y=%POSITION_Y%'
Michael
--
**
ASTRO ELECTRONIC Dipl.-Ing. Michael Koch
Raabestr
Am 24.09.2015 um 19:16 schrieb chandra sheker:
Hi Michael,
you can use this command.
ffmpeg -i temp.mp4
-filter_complex "[0:v]drawtext=fontfile=arial.ttf: text='TEST':
fontcolor=#00@0.40: fontsize=200"
-codec:v mpeg4 out.mp4
The transparency 40% (fontcolor=#00@0.40)
Chandu
Hi
Hello all,
I'm new to this list and have a question about drawtext with dynamic
fontcolor.
The first example doesn't contain dynamic fontcolor and is working as
expected.
It superimposes some text over the video with black color and 25%
transparency:
ffmpeg -i temp.mp4 ^
-vf
Dipl.-Ing. Michael Koch
Raabestr. 43 37412 Herzberg
www.astro-electronic.de
Tel. +49 5521 854265 Fax +49 5521 854266
**
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
http://ffmpeg.org
ffmpeg -framerate 25 -start_number 1 -i IMG_%4d.jpg
-codec:v mpeg4 output.mp4
Please understand that you are expected to always
post your command line including the complete,
uncut console output on this mailing list.
The above command line does exactly what it's supposed to do.
Let's assume I
As mentioned, documentation improvements are *always* welcome.
I agree with Roger that for a beginner FFmpeg's documentation leaves
many questions unanswered. It would be great to have more details and
especially more examples in the documentation.
Many questions are answered in this user
For example, Harald Reindl just wrote:
"and when you specify something twice the right one wins"
Is this already in the FFmpeg documentation?
that's common sense
for you, but not for a beginner.
Michael
___
ffmpeg-user mailing list
What part of this mailing list thread is not
documented in your opinion?
For example, Harald Reindl just wrote:
"and when you specify something twice the right one wins"
Is this already in the FFmpeg documentation?
Michael
___
ffmpeg-user mailing
well, then i ask the question different
"--width=600 --width=300" - what would you expect?
before I saw your answer, it was unclear to me if it's 300 or 600.
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
I have 250 input pictures. With framerate 25, the video
length is 10 seconds.
Related question: Can ffmpeg make a video faster or slower, while
keeping the framerate the same as before?
Michael
--
**
ASTRO ELECTRONIC Dipl.-Ing. Michael Koch
Hi all,
I have a few questions about making timelapse videos from many pictures.
The following command makes a video with framerate 25 and works as expected:
ffmpeg -framerate 25 -start_number 123 -i IMG_%4d.jpg -codec:v mpeg4
output.mp4
My questions:
1. Is it possible to make a video with
Hi all,
I'd like to make a deep zoom-in from several images. For example, begin
with image1 (which was taken with a 50mm objective) and use the zoompan
filter to make a 5 seconds zoom-in from 1x to 4x, then use image2 (taken
with a 200mm objective) and continue to zoom in, and so on. There
Paul,
Something like this:
zoompan=zoom='if(mod(in\,40)\,zoom\,0)+0.01':d=40:x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)'
thank you very much for this hint. The _in_ parameter does indeed work.
With this parameter it's for example possible to make a slideshow and
specify different durations
2. It would be nice to have an expression for a lookup table, for example
lookup(x, y0, y1, y2, ... , z)
Evaluate x, and if the result is 0 return y0, if the result is 1
return y1, and so on, else if the result is out of range return z.
I found a workaround for a lookup table. The
ffmpeg -r 1 -loop 1 -i cherry-left.jpg -r 1 -loop 1 -i
cherry-right.jpg -lavfi
[0:v]setpts=N*2[a],[1:v]setpts=N*2+1[b],[a][b]interleave /tmp/o.nut
I didn't understand the meaning of the output path, but finally I got it
working after I replaced
/tmp/o.nut
by
-t 10 -r 4 test.mp4
Thanks,
Hi all,
I found a bug in the documentation of the lenscorrection filter:
https://www.ffmpeg.org/ffmpeg-all.html#lenscorrection
It's written there "0.5 means no correction" for the coefficients k1 and
k2.
This can't be right, or the formula is wrong. It's obvious that the
formula makes no
Please consider sending a patch that updates the documentation.
I recommend to make the following changes in chapter 38.73.1:
The filter accepts the following options:
cx
Relative x-coordinate of the center of the distortion. This value
has a range [0,1] and is expressed as fractions
Am 23.02.2016 um 10:00 schrieb Michael Koch:
I found a bug in the documentation of the lenscorrection filter:
https://www.ffmpeg.org/ffmpeg-all.html#lenscorrection
It's written there "0.5 means no correction" for the coefficients k1
and k2.
This can't be right, or the formula is w
Am 23.02.2016 um 18:51 schrieb Michael Koch:
r_src is the radial coordinate in object space.
r_tgt is the radial coordinate in the image, which was taken with a
distorted lens.
Sorry, I confused these two. This is correct:
r_tgt is the radial coordinate in object space.
r_src is the radial
Hi all,
I'd like to make a suggestion for improvement. It's easy to make a video
from many pictures, but it's difficult to make a video which runs in
reverse order. I propose a new parameter "-number_decrease" which tells
ffmpeg to decrease the file number, instead of increasing it.
Am 27.01.2016 um 13:21 schrieb pra...@devrepublic.nl:
Hi Carl,
I am running this command
ffmpeg -framerate 1/5 -pattern_type glob -i
'/home/devprj01/domains/devrepublic-projects.nl/public_html/development/houseview2/uploads/projects/52/images/temp/*.jpg'
-i
second.
Michael
--
**
ASTRO ELECTRONIC Dipl.-Ing. Michael Koch
Raabestr. 43 37412 Herzberg
www.astro-electronic.de
Tel. +49 5521 854265 Fax +49 5521 854266
Thanks for advice, I've tried running the following command, but I get an
error as follows:
./ffmpeg -framerate 25 -pattern_type glob -i
/root/video-source/gif/yeay.gif /root/video-source/gif/outgif/outyeay.mp4
Do you have many gif images, or do you have one animated gif?
The answer from
Great, I thought, and since I will need a days worth of pictures (1 every
minute gives 1440 pictures) I'll rename them 0601.jpg to 1200.jpg and try
ffmpeg.exe -r 30 -i C:\Users\kostas\Documents\cams\timelapse\test2\%04d.jpg
timelapse9.mp4
You forgot to specify -start_number 601
Michael
> OT: Cool photos! Michael, what lens did you use? An 8mm? If you don't
mind me asking.
yes, Canon EF 8-15mm at 8mm. I'm making a timelapse in the wood over a
full year.
> If you wanted to convert it back this could work?
> $ ffmpeg -i IMG_044.JPG -pix_fmt yuvj422p IMG_044-yuvj422p.JPG
The option "-start_number_range" is only used when searching for the
first image of a sequence. I propose to add a new option "-number_range"
that specifies the number of trials if the next image in a sequence
isn't found.
For example, when making a timelapse from hundreds of images, it may be
> That should not be necessary, assuming you are not on aixor sparc64.
Is something wrong with the Zeranoe builds?
The latest version from Zeranoe (downloaded today) has the same problem, black
and white output if used without the format filter.
F:\xxx\xxx>c:/ffmpeg/ffmpeg -i in.mp4 -i
I also tested the fisheye_grid_xmap.pgm and fisheye_grid_ymap.pgm files
which can be downloaded from the Wiki page:
https://trac.ffmpeg.org/wiki/RemapFilter
Same problem, the output is black and white. So I think it's not a
problem of my own map files.
Michael
F:\xxx\xxx>c:/ffmpeg/ffmpeg -i
> I will contact them to be removed from the blacklist/blocklist.
Thank you very much. It's working now.
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or
Perhaps you could try remap filter?
Unfortunately the remap filter has so few documentation.
No examples at all. Is it possible to create the Xmap and Ymap files with
ffmpeg?
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
One just substract each possible value with 128 and now you have [-128, 127].
Thanks for your fast answer. That should be added to the documentation!
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
In the documentation for the displace filter is written:
"The second input specifies how much to displace pixels along the
x-axis, ..."
If I understand this right, a video input file is "misused" for storing
the displacement (instead of brightness). Does that mean that only
positive
One just substract each possible value with 128 and now you have [-128, 127].
The range is too small for my purpose. Is it possible to create 16 bit
displacements?
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
> Yes, with geq filter. Remap filter documentation is on FFmpeg wiki.
I can't find an example how to make the Xmap and Ymap files with ffmpeg.
In the wiki the files are made with a C program which is difficult to
understand.
https://trac.ffmpeg.org/wiki/RemapFilter
This example is from the
Finally I found a solution how to make curved text for a fulldome video.
It's awfully slow because in the geq filter the same calculations are
made for each frame again and again. But it works. Below is the Windows
batch file.
Most probably the remap filter would make this process much faster,
Sounds like a bug: Do you have pgm files that provide "identity" output?
I did just make these files with my C# program.
The output video is a black and white copy of the input.
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
> Can you provide them?
"identity" maps for size 1000x1000
http://www.astro-electronic.de/xmap_1000.pgm
http://www.astro-electronic.de/ymap_1000.pgm
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
I've written a C# program to create my own xmap and ymap files for the
remap filter.
The geometric distortion in the output video looks as expected. But why
is the output only black and white?
I've tested two different input videos with the same result. No colors
in the output.
The console
> Workaround is probably to use the format filter.
yes, that works.
-lavfi "format=pix_fmts=rgb24,remap"
Thanks,
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link
Do you see the same behaviour with current FFmpeg git head?
sorry, I can't compile ffmpeg myself, that's too difficult for me.
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-user
To
I would guess that at this point (which corresponds to your 4..5
seconds), something is different about the JPEG images.
You are totally right. I just found out that it's only one image that
produces the problem.
This is one of the good images. It's a HDR image from a Canon 6D:
During the last 2 or 3 weeks I did several times try to subscribe to
this mailing list, without success. After I entered my email address,
name and password, this message is shown: "Your subscription request has
been received, and will soon be acted upon. Depending on the
configuration of this
> Can you reproduce the issue if you recreate the 145 jpg images with
ffmpeg using testsrc2?
I did make 145 images with this command line and could not reproduce the
problem with these images. Also I have several other sets of images,
some do show this problem and some do not. But I don't
Hi all,
I'm trying to make a timelapse video from 145 images, which must first
be cropped to quadratic size and then a circular mask must be overlaid.
The overlay comes from a PNG image (black border with transparent
circle). The video looks good in the first 4 or 5 seconds, but then the
I just figured out how to make a slideshow with crossfade. It's a two
step process. The first step reads the pictures with framerate 0.5
(which means 2 seconds for each picture), and produces an intermediate
video with framerate 2. That means each picture is repeated 4 times. The
second step
/ffmpeg -framerate 0.5 -i IMG_%3d.jpg -r 2 -codec:v mpeg4 temp.mp4 />>/ffmpeg -i temp.mp4
-vf "framerate=fps=25" -codec:v mpeg4 out.mp4 /
You should be able to combine the command lines using the fps filter.
I did already try that, but unfortunately it doesn't work. I did try this
command
> Complete, uncut console output for the working and the failing case
missing.
This is the console output for the working case (first zoompan filter,
then framerate filter):
F:\xxx\Test_Crossfade>c:/ffmpeg/ffmpeg -i IMG_%3d.jpg -vf zoompan=d=
4:s=5472x3648:fps=2,framerate=25 -c:v mpeg4 -q:v
Let me explain again what I want to do. I have 5 pictures:
1, 2, 3, 4, 5
I want to read these pictures with framerate 0.5 and then convert the
framerate to 2, so that each picture is repeated 4 times:
1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5
As the last step I want to make the
Have a look at the image2 demuxer and its "-loop" option. "-loop 1"
should also work for the concat demuxer, which takes a list of input
files (instead of following a pattern).
That's exactly what I need. Thank you very much!
Michael
___
Let's assume I have a sequence of 100 images. Is it possible to let
ffmpeg loop over this input sequence again and again?
I mean the input should be 0, 1, 2, ... , 99, 0, 1, 2, ... , 99, 0, 1,
2 and so on. Is this possible?
Thanks,
Michael
___
Am 28.07.2018 um 21:11 schrieb Anmol Mishra:
Is there a plugin for ffmpeg that allows for a bulge warp in y-axis only ?
yes, please have a look at the remap filter.
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
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
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
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
Repeat the first frame of a video 100 times (with the same framerate as
the video), then copy the video, then repeat the last frame 100 times?
If you mean to copy video without generally losing quality than answer is no.
Otherwise you can use loop video filter.
The loop video filter
Hi,
is it possible to do the following with ffmpeg?
Repeat the first frame of a video 100 times (with the same framerate as
the video), then copy the video, then repeat the last frame 100 times?
Thanks,
Michael
___
ffmpeg-user mailing list
Repeat the first frame of a video 100 times (with the same framerate as
the video), then copy the video, then repeat the last frame 100 times?
If you mean to copy video without generally losing quality than
answer is no.
Otherwise you can use loop video filter.
The loop video filter
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
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.
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 s
Am 13.08.2018 um 10:08 schrieb Joshua Grauman:
Hi all,
I am combining various effects, and I noticed that when I fade in a
video
using the [in]fade=t=in:st=2:n=24[out] syntax, and I fade in text using
alpha='if(lt(t,2),0,if(lt(t,3),t-2,1))', that they both fade in
roughly at
the same time,
Am 27.08.2018 um 15:00 schrieb Paul B Mahol:
On 8/27/18, Michael Koch wrote:
In the first example I have two identical 1kHz sine sources. The first
source is delayed by 0.5ms (which means 180DEG phase shift), and then both
channels are mixed. This works as expected, the result is silence
In the first example I have two identical 1kHz sine sources. The first
source is delayed by 0.5ms (which means 180° phase shift), and then both
channels are mixed. This works as expected, the result is silence.
ffmpeg -f lavfi -i sine=f=1000:d=5 -f lavfi -i sine=f=1000:d=5
-filter_complex
Am 10.09.2018 um 12:32 schrieb Vukan:
I am merging an image sequence into a video using the following command:
ffmpeg -f image2 -i "input\image%09d.png" -framerate 60 output.mp4
However, the framerate of the output video is always 25, no matter what I
set as -framerate argument. What is going
Is it possible to multiply audio samples from two sources?
I'd like to downconvert the 15kHz to 25kHz range to the 0 to 10kHz
range. First apply a strong 15kHz highpass filter, then multiply the
signal with a 15kHz sine wave (which produces sum and difference
signals), then apply a 10kHz
Am 12.09.2018 um 09:55 schrieb Paul B Mahol:
Hi,
On 9/12/18, Michael Koch wrote:
Is it possible to multiply audio samples from two sources?
I'd like to downconvert the 15kHz to 25kHz range to the 0 to 10kHz
range. First apply a strong 15kHz highpass filter, then multiply the
signal
Am 27.09.2018 um 21:33 schrieb esikcalabr...@verizon.net:
Any suggestions in a batch file which would take 2 user defined variables to
convert an audio file? I have drafted the below which so far does not work.
echo off
set /p filename = "Enter Unconverted File Name: "
set /p
Am 27.09.2018 um 22:30 schrieb Michael Koch:
Am 27.09.2018 um 21:33 schrieb esikcalabr...@verizon.net:
Any suggestions in a batch file which would take 2 user defined
variables to
convert an audio file? I have drafted the below which so far does
not work.
echo off
set /p filename
Am 27.09.2018 um 22:45 schrieb esikcalabr...@verizon.net:
Yes it is there. I can convert by command line but just can't get the batch to
work. I replaced : with " and the screen flashed a 2nd command prompt flashed,
closed and back to enter any key to continue. Nothing happened.
please
Could find no file with path 'res_%d.png' and index in the range 0-4
res_%d.png: No such file or directory
So the filenames start from res_05.png till res_180.png but there are some
files missing in between like res_13.png etc.
Would that be a problem?
The problem is that you have a
Am 11.11.2018 um 20:50 schrieb Balint Marton:
Hi,
Does ffmpeg has support for some kind of non linear scaling, e.g.
scaling/steching the side of the picture more than the middle?
have a look at the remap filter
Michael
___
ffmpeg-user mailing
Am 03.10.2018 um 13:23 schrieb Paul B Mahol:
On 10/3/18, Michael Koch wrote:
Am 03.10.2018 um 12:28 schrieb DopeLabs:
im not sure if windows has the ability to 'pipe' like a *nix system does..
but this works to pipe the output of ffmpeg to ffplay instead of a file..
hope this helps
s
system.
Michael
--
**
ASTRO ELECTRONIC Dipl.-Ing. Michael Koch
Raabestr. 43 37412 Herzberg
www.astro-electronic.de
Tel. +49 5521 854265
I'm still experimenting with the ultrasonic converter. Converting from
one file to another file works without problems:
C:\Users\mkoch\Desktop\Ultrasonic Live>c://ffmpeg/ffmpeg -i
test_15kHz.mp3 -f la
vfi -i aevalsrc="sin(12000*2*PI*t):c=stereo:s=44100" -filter_complex
"[0]volume=
e top line of the console
window, then "select all", then "copy".
Michael
--
**
ASTRO ELECTRONIC Dipl.-Ing. Michael Koch
Raabestr. 43 37412 Herzberg
www.astro-electronic.de
Tel. +49 552
Am 28.09.2018 um 15:20 schrieb esikcalabr...@verizon.net:
Thank you Michael:
Based on new information, I have revised the script with the following. It
seems to be working a bit better; however, still not there yet. Below is the
new script with output below:
set /p filename = "Enter
oh no, I don't want to learn a new command line syntax only to solve
this simple problem.
I have a long ffmpeg command line that's working fine when writing the
output to a file. Is there really no easy way to send the output to the
speakers instead?
It is very easy syntax to learn, you can
r_version : 538247680
compatible_brands: qt CAEP
com.apple.quicktime.make: Canon
com.apple.quicktime.model: Canon EOS 5D Mark IV
com.apple.quicktime.rating.user: 0.00
com.apple.quicktime.author: Michael Koch
creation_time : 2018-09-14T18:20:37.00Z
Duration: 00:00:53.00, start: 0.
Am 28.09.2018 um 18:30 schrieb esikcalabr...@verizon.net:
I believe I'm getting closer. It doesn't appear to get the 2nd variable.
set /p filename="Enter Unconverted File Name: "
set /p outputfilename="Enter Converted File Name: "
CALL "C:\ffmpeg\bin\ffmpeg.exe" ffmpeg -i %filename%
1,lowpass=f=1,lowpass=f=1" -t 10 -f mp3 pipe:play -
//ffmpeg/ffplay
The syntax looks broken here:
Do you want to use a named pipe "play"?
Iiuc, you have to create this pipe before launching FFmpeg,
no need to specify a second output url.
Or you want to use the pipe "-", in this
Am 27.12.2018 um 20:18 schrieb Carl Eugen Hoyos:
2018-12-27 19:01 GMT+01:00, alex jamshedi :
My goal is to receive a live audio stream that is being sampled at
131,072 Hz and re-sample it at 44.1 kHz before outputting it
through my computers speakers. Is this a task ffmpeg can perform?
Yes,
Am 29.12.2018 um 20:19 schrieb Michael Koch:
I would use the practical nut container, and do:
$ ffmpeg -i input -f nut - | ffplay -
F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut
- | c://f
fmpeg/ffplay -
ffmpeg version N-91960-g63c69d51c7 Copyright (c) 2000-2
Am 29.12.2018 um 20:53 schrieb Reino Wijnsma:
On 29-12-2018 20:19, Michael Koch wrote:
F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut - | c://f
fmpeg/ffplay -
Have you actually tested this at all? Forward slashes don't work on Windows!
Sure I tested this. I pos
Am 28.12.2018 um 11:46 schrieb Paul B Mahol:
One can now use afftfilt to shift frequencies around in frequency domain.
It should be easier than using amultiply filter.
c:\ffmpeg\ffmpeg -f dshow -channels 2 -i audio="Mikrofon (Realtek High
Definiti" -af
Works fine here (unless I add funny characters) here with Windows
cmd, both with and without using a batch file.
Finally it's working here. This is the content of the batch file:
c:\\ffmpeg\ffmpeg -i 699.mp4 -f nut - | c:\\ffmpeg\ffplay -
-- all backslashes
-- no escape character before |
Might it be part of the problem that I'm starting ffmpeg from a batch
file?
This is the content of the batch file:
c://ffmpeg/ffmpeg -i 699.mp4 -f nut - ^| c://ffmpeg/ffplay -
pause
I just found out that when using this command in a batch file, it
doesn't matter if the slashes are forward
I would use the practical nut container, and do:
$ ffmpeg -i input -f nut - | ffplay -
F:\Sound\Ultraschall_Konvertierung>c://ffmpeg/ffmpeg -i 699.mp4 -f nut -
| c://f
fmpeg/ffplay -
ffmpeg version N-91960-g63c69d51c7 Copyright (c) 2000-2018 the FFmpeg
developers
built with gcc 8.2.1
I found a problem while I was experimenting with the haldclut filter.
But it's simpler to reproduce without haldclut. The input video contains
10 seconds of noise (10-bit) and can be downloaded here (2MB):
http://www.astro-electronic.de/x.mov
My command line compares two cases with hstack.
Sounds good, but with
$ ffmpeg -i CYD_6m_copy.vob -movflags +faststart -vf
"fillborders=top=1" -c:v libx264 -c:a copy CYD_6m_fill-top_H.264.mp4
I get:
[AVFilterGraph @ 0x55a6153dafa0] No such filter: 'fillborders'
With the latest Windows 64-bit version from Zeranoe it's working.
Michael
Is it possible to extract a single frame from a 10 bit video and save it
lossless as a 16 bit PNG file? Unfortunately the documentation for the
PNG video encoder is very short.
Or is any other image format with 10 or more bits supported?
Michael
___
Am 02.12.2018 um 14:08 schrieb Michael Koch:
Is there any free software for creating or editing files for the lut3d
filter?
In the meantime I found a nice *.cube generator tool here:
https://generator.iwltbap.com/
My next question is about the lut1d filter. Unfortunately I didn't find
much
Is there any free software for creating or editing files for the lut3d
filter?
Thanks,
Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, visit link above, or email
My question is how to use ffprobe on a Windows7 system. So far, I've
used the following three step procedure:
1. create or edit a batch file which contains two lines:
c://ffmpeg/ffprobe myvideo.mp4
pause
2. save the batch file
3. start the batch file
This works fine but it's time
1 - 100 of 796 matches
Mail list logo