Am 19.05.2024 um 19:02 schrieb Steven Kan:
I have a series of 476 PNGs, exported from Excel in a loop through a series of
values to control the plotted range:
https://www.kan.org/download/1.png
https://www.kan.org/download/2.png
https://www.kan.org/download/3.png
Am 29.04.2024 um 11:28 schrieb turgut kalfaoğlu:
Hi. I have an interesting case. I need to extract sound from multiple
input files, combine those video files into one, and then re-insert
the audio into the combined video file.
Unfortunately I need to do them in this order. Extract sounds,
Am 24.03.2024 um 23:30 schrieb Bo Berglund:
But is it possible also to modify an mp4 video file to *play* faster/slower than
original while keeping the accompanying audio pitch the same?
It's possible to change audio length, sample rate and pitch, and also
all combinations of these three
Am 11.01.2024 um 10:53 schrieb emmanuel martin:
I’m experimenting with the ‘displace’ filter, and I’d like to apply my
displacement maps with a blend effect on the main track. I’ve tried various
things without success, and I haven’t found many examples of using this filter.
Is it possible to
Am 05.01.2024 um 10:26 schrieb Cecil Westerhof via ffmpeg-user:
Ferdi Scholten writes:
I want to play a video in a video from a certain point. I understood I
could do something like:
ffmpeg \
-i input1.mp4 \
-i input2.mp4 \
-filter_complex "
Am 05.01.2024 um 07:51 schrieb Ferdi Scholten:
I want to play a video in a video from a certain point. I understood I
could do something like:
ffmpeg \
-i input1.mp4 \
-i input2.mp4 \
-filter_complex "
[0:v][1:v] overlay=25:25:
Am 28.12.2023 um 03:25 schrieb Carl Zwanzig:
On 12/27/2023 3:54 PM, Jim DeLaHunt wrote:
The documentation says, "x is the index of the internal variable
which will be used to save the seed/state."
(https://ffmpeg.org/ffmpeg-all.html#Expression-Evaluation). I don't
know what it means by "index
Am 27.12.2023 um 23:59 schrieb Jim DeLaHunt:
Michael:
On 2023-12-27 13:51, Michael Koch wrote:
...I'm using this command line to print four consecutive random numbers:
...
I do not have an answer to your question about the behaviour of the
random() function. However, I cannot reproduce your
Am 27.12.2023 um 23:04 schrieb Devin Heitmueller:
On Wed, Dec 27, 2023 at 4:51 PM Michael Koch
wrote:
Hi,
I'm using this command line to print four consecutive random numbers:
ffmpeg -loglevel repeat -f lavfi -i color=gray:size=1x1,format=gray -vf
geq=lum='st(0,0.123);print(random(0));print
Hi,
I'm using this command line to print four consecutive random numbers:
ffmpeg -loglevel repeat -f lavfi -i color=gray:size=1x1,format=gray -vf
geq=lum='st(0,0.123);print(random(0));print(random(0));print(random(0));print(random(0));0'
-frames 1 -y out.png
The output is always the same
Am 19.12.2023 um 13:56 schrieb emmanuel martin:
Hello,
Is there a way to do a displacement map in FFMPEG ? I would like to achieve
this glass effect - See attached file.
yes, please have a look at the "displace" filter or better the "remap"
filter.
You find many examples in my book:
Am 16.12.2023 um 23:41 schrieb emmanuel martin:
Thanks for answering ! I took some time to understand the jpg frequency at
25fps. I made the following modifications and it works very well :
ffmpeg -framerate 30 -loop 1 -i participant1.jpg -framerate 30 -i
participant1.jpg -filter_complex "\
Am 16.12.2023 um 19:51 schrieb emmanuel martin:
I have two inputs that are the same image. The first one, I loop to create
a video for 8 seconds. I also create two streams that I will overlay. The
background is the normal video, and above it is the same video with a LUT
(Look-Up Table) that I
Am 16.12.2023 um 19:51 schrieb emmanuel martin:
I have two inputs that are the same image. The first one, I loop to create
a video for 8 seconds. I also create two streams that I will overlay. The
background is the normal video, and above it is the same video with a LUT
(Look-Up Table) that I
Am 02.12.2023 um 05:34 schrieb Ric Hunter:
Hello
I want to convert an image sequence (jpg) into a mp4 but i want some part
of the image sequence to be pixelated based on another mask image sequence
(jpg, the white being pixelated, the black being not, but it can be png
with alpha I don't mind,
Am 11.11.2023 um 00:35 schrieb James Thornton:
When you have two or more live streams, and you want the ability to toggle
between the two, such as switching to camera 2's feed on the main screen,
how do you do that and what do you need to consider when constructing such
a system?
I prefer to do
Am 07.11.2023 um 18:23 schrieb Phil Rhodes via ffmpeg-user:
So let me get this straight.
There's a command line option called colorspace.
There's a filter called colorspace which has options including "space," "trc" (meaning
"transfer characteristics") and "primaries," as well as several
Am 29.10.2023 um 18:08 schrieb Ulf Zibis:
[Parsed_vfrdet_0 @ 0x55a6d9979b80] VFR:0.232174 (34273/113345) min:
900 max: 14400 avg: 4892
What do the numbers mean, are this nano seconds ? (the ffmpeg docs
don't outline this)
That's a good question. I also don't know the answer.
Michael
How can I insert protected whitespaces in the Wiki? I've tried
and but both don't work.
I did also search on this page, but didn't find it:
https://trac.ffmpeg.org/wiki/WikiFormatting
Thanks,
Michael
___
ffmpeg-user mailing list
Am 16.10.2023 um 13:50 schrieb Cecil Westerhof via ffmpeg-user:
For example: if I have a video where I want to change for a short
while only the video, but not the audio.
Say I have a video A of five minutes B of 3 seconds and C of 5
seconds.
At 2:12 I want to use the video of video B instead of
Am 12.10.2023 um 11:51 schrieb Cecil Westerhof via ffmpeg-user:
I just found this:
https://trac.ffmpeg.org/wiki/Capture/Desktop
Very interesting indeed.
I have two monitors. I could write something about how to use this
with two monitors (or more). Would that be appreciated? If yes, how
Am 23.09.2023 um 23:31 schrieb Mark Filipak:
On Sat, Sep 23, 2023 at 1:44 PM Michael Koch
wrote:
I have an example in chapter 2.223 in my book:
http://www.astro-electronic.de/FFmpeg_Book.pdf
Scroll down to "Method 3".
Thank you, Michael! I expanded on it.
ffmpeg -i "%SOUR
Am 23.09.2023 um 19:24 schrieb Mark Filipak:
The question is this: How can I use ffmpeg to put SRT subs into MP4?
Is there a direct parameter?
I have an example in chapter 2.223 in my book:
http://www.astro-electronic.de/FFmpeg_Book.pdf
Scroll down to "Method 3".
Michael
Am 20.09.2023 um 16:50 schrieb Naveen.B:
Hello,
Thanks for the sharing the useful links,
I tried the way you said, but I am not sure whats happening, I don't see
anything happening after executing the command (neither it saves the jpg
files in the current path), I need to kill the process in
Am 19.09.2023 um 16:49 schrieb Naveen.B:
Hello,
udp_data is a directory created to store the extracted RAW frames from the
camera.
The correct syntax is:
ffmpeg -i input output
For output, it's not sufficient to specify a folder. You must also
specify the filename, which may contain a
Am 19.09.2023 um 13:11 schrieb Naveen.B:
Hello,
I have a ethernet camera connected to my laptop hub, it is configured and i
can see the streamed Images from the camera using the ffplay command,
but when I try to save the RAW Images onto the local directory, I am facing
the error,
Am 05.09.2023 um 11:47 schrieb Naveen.B:
Hello,
How could I achive it by directing ethernet images to the screen?
Use ffplay instead of ffmpeg.
See also the first example in chapter 24.34.3:
https://www.ffmpeg.org/ffmpeg-all.html
Michael
___
Am 14.08.2023 um 08:30 schrieb Gyan Doshi:
On 2023-08-14 11:47 am, Michael Koch wrote:
Am 14.08.2023 um 07:41 schrieb Michael Koch:
Hello,
I'd like to make a batch file for FFplay that shows only the first
frame of a video until the window is closed. It should also work for
still images
Am 14.08.2023 um 07:41 schrieb Michael Koch:
Hello,
I'd like to make a batch file for FFplay that shows only the first
frame of a video until the window is closed. It should also work for
still images. This command line works for still images and for most
videos, but not for all:
ffplay
Hello,
I'd like to make a batch file for FFplay that shows only the first frame
of a video until the window is closed. It should also work for still
images. This command line works for still images and for most videos,
but not for all:
ffplay -loop 0 -t 0 -x 500 -an %1
Below is the console
Am 14.03.2023 um 10:37 schrieb Natalia Molinero Mingorance:
I'm using this command:
-y -r -i $inVideoUri -movflags faststart -c:v libx265 -s
$videoResolution -c:a copy -preset ultrafast $outPutUri"
However, if "videoResolution" is a 50% of the original video resolution,
the resulting file
Am 10.03.2023 um 06:01 schrieb Marcin Borkowski:
On 2023-03-08, at 19:15, Michael Koch wrote:
Am 08.03.2023 um 18:48 schrieb Marcin Borkowski:
Hi all,
I'm fairly new to ffmpeg, so sorry, if this is something obvious. (I'd
also appreciate any pointers to the docs - I haven't read them all
Am 08.03.2023 um 18:48 schrieb Marcin Borkowski:
Hi all,
I'm fairly new to ffmpeg, so sorry, if this is something obvious. (I'd
also appreciate any pointers to the docs - I haven't read them all, of
course, but I _did_ try to find the answer to my questions there.)
I know that I can create a
Am 01.03.2023 um 10:55 schrieb Gabriel Dina:
1 frame, indeed, but is the first image without logo and info. Maybe it is
a way to get the last frame?
In your example all three inputs are images, so the output can only one
image.
If the first input is a video, you could add -ss 5 before this
Am 01.03.2023 um 10:39 schrieb Gabriel Dina:
Updated command:
ffmpeg -i *uploads/test.png* -i ./assets/logo.png -i ./assets/telefon.png
-filter_complex
Am 01.03.2023 um 10:23 schrieb Michael Koch:
Am 01.03.2023 um 10:12 schrieb Gabriel Dina:
ffmpeg -i uploads/image.mp4 -i ./assets/logo.png -i ./assets/info.png
-filter_complex "[1][0]scale2ref=w='iw
*1/5':h='ow/mdar'[v1];[2][0]scale2ref=w='iw*9/10':h='ow/mdar'[v2];[0][v1]overlay=m
Am 01.03.2023 um 10:12 schrieb Gabriel Dina:
ffmpeg -i uploads/image.mp4 -i ./assets/logo.png -i ./assets/info.png
-filter_complex "[1][0]scale2ref=w='iw
Am 27.02.2023 um 16:52 schrieb Michael Koch:
Am 27.02.2023 um 16:34 schrieb Michael Koch:
Am 27.02.2023 um 16:07 schrieb William Jones:
Hi All,
I'm having a big problem with ffmpeg at the moment and wanted to pry
the
minds of anyone who may know.
Trying to export a image sequence as a .mxf
Am 27.02.2023 um 16:34 schrieb Michael Koch:
Am 27.02.2023 um 16:07 schrieb William Jones:
Hi All,
I'm having a big problem with ffmpeg at the moment and wanted to pry the
minds of anyone who may know.
Trying to export a image sequence as a .mxf file at 1920x1080, DnxHD
115.
Unfortunately
Am 27.02.2023 um 16:07 schrieb William Jones:
Hi All,
I'm having a big problem with ffmpeg at the moment and wanted to pry the
minds of anyone who may know.
Trying to export a image sequence as a .mxf file at 1920x1080, DnxHD 115.
Unfortunately every time I try, the resulting file comes out
Am 20.02.2023 um 15:50 schrieb Michael Koch:
Am 20.02.2023 um 15:46 schrieb Gyan Doshi:
On 2023-02-20 07:58 pm, Michael Koch wrote:
Am 20.02.2023 um 15:18 schrieb Gyan Doshi:
On 2023-02-20 07:33 pm, Michael Koch wrote:
Am 20.02.2023 um 14:54 schrieb Gyan Doshi:
On 2023-02-20 07:15 pm
Am 20.02.2023 um 15:46 schrieb Gyan Doshi:
On 2023-02-20 07:58 pm, Michael Koch wrote:
Am 20.02.2023 um 15:18 schrieb Gyan Doshi:
On 2023-02-20 07:33 pm, Michael Koch wrote:
Am 20.02.2023 um 14:54 schrieb Gyan Doshi:
On 2023-02-20 07:15 pm, Michael Koch wrote:
Am 20.02.2023 um 14:29
Am 20.02.2023 um 15:18 schrieb Gyan Doshi:
On 2023-02-20 07:33 pm, Michael Koch wrote:
Am 20.02.2023 um 14:54 schrieb Gyan Doshi:
On 2023-02-20 07:15 pm, Michael Koch wrote:
Am 20.02.2023 um 14:29 schrieb Gyan Doshi:
On 2023-02-20 06:27 pm, Michael Koch wrote:
Am 20.02.2023 um 13:50
Am 20.02.2023 um 14:54 schrieb Gyan Doshi:
On 2023-02-20 07:15 pm, Michael Koch wrote:
Am 20.02.2023 um 14:29 schrieb Gyan Doshi:
On 2023-02-20 06:27 pm, Michael Koch wrote:
Am 20.02.2023 um 13:50 schrieb Gyan Doshi:
On 2023-02-20 06:03 pm, Michael Koch wrote:
Hello,
I'm testing
Am 20.02.2023 um 14:54 schrieb Gyan Doshi:
On 2023-02-20 07:15 pm, Michael Koch wrote:
Am 20.02.2023 um 14:29 schrieb Gyan Doshi:
On 2023-02-20 06:27 pm, Michael Koch wrote:
Am 20.02.2023 um 13:50 schrieb Gyan Doshi:
On 2023-02-20 06:03 pm, Michael Koch wrote:
Hello,
I'm testing
Am 20.02.2023 um 14:29 schrieb Gyan Doshi:
On 2023-02-20 06:27 pm, Michael Koch wrote:
Am 20.02.2023 um 13:50 schrieb Gyan Doshi:
On 2023-02-20 06:03 pm, Michael Koch wrote:
Hello,
I'm testing the ddagrab filter with the example from the
documentation. I did only add -t 10 -y
Am 20.02.2023 um 13:50 schrieb Gyan Doshi:
On 2023-02-20 06:03 pm, Michael Koch wrote:
Hello,
I'm testing the ddagrab filter with the example from the
documentation. I did only add -t 10 -y, but that can't be the problem.
ffmpeg -f lavfi -i ddagrab -c:v h264_nvenc -cq 18 -t 10 -y out.mp4
Hello,
I'm testing the ddagrab filter with the example from the documentation.
I did only add -t 10 -y, but that can't be the problem.
ffmpeg -f lavfi -i ddagrab -c:v h264_nvenc -cq 18 -t 10 -y out.mp4
What does this error message mean?
[h264_nvenc @ 01f5f7bbf980] OpenEncodeSessionEx
Am 16.02.2023 um 12:31 schrieb Alexander Bieliaev via ffmpeg-user:
How can I analyze the volume of input audio (in dB) and write that to the
text file?
If you want to know the mean and maximum volume in the whole stream,
that can be done with the volumedetect filter. Or do you want to know
Am 30.01.2023 um 20:45 schrieb Paul B Mahol:
filter supports up to 16bit rgb(a), adding float would be trivial.
patch welcome
Thanks for adding float to colorlevels.
Is there any filter for gamma correction with float?
Does the geq filter support float?
Yes.
Gamma correction with float
Am 01.02.2023 um 09:39 schrieb Alexander Bieliaev via ffmpeg-user:
Thanks, it kinda worked for me, but it seems like it's dependent on the
length of the inserted audio. For example if I have a 2 minute audio and
try to replace some parts of it with audio that is 1 minute long, for the
first
Am 01.02.2023 um 11:27 schrieb Alexander Bieliaev via ffmpeg-user:
How can I replace multiple parts of audio with generated beeps?
I tried next command:
-filter_complex "
[0]volume=0:enable='between(t,10,15)+between(t,20,30)'[main];
sine=f=800,
pan=stereo|FL=c0|FR=c0,
Am 30.01.2023 um 12:52 schrieb Paul B Mahol:
On 1/30/23, Michael Koch wrote:
Am 30.01.2023 um 10:29 schrieb Paul B Mahol:
You wrote:
"With default parameters and just strength(2) set to your values, so
the darkest pixels are left untouched."
However I want that black remains
Am 30.01.2023 um 10:29 schrieb Paul B Mahol:
You wrote:
"With default parameters and just strength(2) set to your values, so
the darkest pixels are left untouched."
However I want that black remains untouched. That's not the same, because
the darkest pixels in the image aren't black.
The
Am 30.01.2023 um 08:47 schrieb Paul B Mahol:
On Mon, Jan 30, 2023 at 12:23 AM Michael Koch
wrote:
Am 29.01.2023 um 23:36 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 23:07 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 22:05 schrieb Paul
Am 29.01.2023 um 23:36 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 23:07 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 22:05 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 19:32 schrieb Paul B Mahol:
On 1/29/23
Am 29.01.2023 um 23:07 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 22:05 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 19:32 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Hello,
if I understood the documentation correctly
Am 29.01.2023 um 22:05 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Am 29.01.2023 um 19:32 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Hello,
if I understood the documentation correctly, the normalize filter maps
the darkest input pixel to blackpt and the brightest input
Am 29.01.2023 um 19:32 schrieb Paul B Mahol:
On 1/29/23, Michael Koch wrote:
Hello,
if I understood the documentation correctly, the normalize filter maps
the darkest input pixel to blackpt and the brightest input pixel to
whitept:
darkest pixel --> blackpt
brightest pixel --> w
Hello,
if I understood the documentation correctly, the normalize filter maps
the darkest input pixel to blackpt and the brightest input pixel to whitept:
darkest pixel --> blackpt
brightest pixel --> whitept
However I need a slightly different mapping:
A black input pixel shall remain black,
Hello all,
this is not a question. This cool equation was designed by Hamid Naderi
Yeganeh. I did only translate it into a FFmpeg command. Let it run and
see what comes out.
ffmpeg -f lavfi -i color=black:s=hd1080,format=gray -vf
Am 22.01.2023 um 23:52 schrieb Reino Wijnsma:
Hello Michael,
On 2023-01-22T18:50:20+0100, Michael Koch wrote:
This command line works with asendcmd and astreamselect:
ffmpeg -i audio1.wav -i audio2.wav -lavfi asendcmd="4 astreamselect map
1",asendcmd="6 astreamselect map 0
Am 22.01.2023 um 19:21 schrieb Paul B Mahol:
On 1/22/23, Michael Koch wrote:
Am 22.01.2023 um 16:56 schrieb Michael Koch:
Am 22.01.2023 um 16:25 schrieb Paul B Mahol:
On 1/22/23, Michael Koch wrote:
Am 21.01.2023 um 17:05 schrieb Paul B Mahol:
On 1/19/23, Michael Koch wrote:
Am
Am 22.01.2023 um 16:56 schrieb Michael Koch:
Am 22.01.2023 um 16:25 schrieb Paul B Mahol:
On 1/22/23, Michael Koch wrote:
Am 21.01.2023 um 17:05 schrieb Paul B Mahol:
On 1/19/23, Michael Koch wrote:
Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user:
How can I replace a part
Am 22.01.2023 um 16:25 schrieb Paul B Mahol:
On 1/22/23, Michael Koch wrote:
Am 21.01.2023 um 17:05 schrieb Paul B Mahol:
On 1/19/23, Michael Koch wrote:
Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user:
How can I replace a part of the audio from and to a specific time
Am 21.01.2023 um 17:05 schrieb Paul B Mahol:
On 1/19/23, Michael Koch wrote:
Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user:
How can I replace a part of the audio from and to a specific time with
some
other audio/sound (I want to replace it with beep in this case)?
Here
Am 20.01.2023 um 00:37 schrieb JJ jo:
Hi,
I'm new and I don't know if it's the right way to ask for a problem. I have
a problem when attempting to create an image sequence from an mkv file.
This is the code i put in a *.bat file:
ffmpeg -i input.mkv %04d.jpg
If used in a (Windows) batch file,
Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user:
How can I replace a part of the audio from and to a specific time with some
other audio/sound (I want to replace it with beep in this case)?
Here is an example:
ffmpeg -lavfi sine=500:d=10 -y audio1.wav
ffmpeg -lavfi
Am 31.12.2022 um 10:31 schrieb Bouke / Videotoolshed:
On 31 Dec 2022, at 04:53, Gyan Doshi wrote:
On 2022-12-31 08:15 am, David Niklas wrote:
Sorry for taking so long to reply.
It is not working. Terminal output below.
% ffmpeg -i Ducksinarow.mp4 -filter_complex
Am 06.12.2022 um 01:10 schrieb Carl Zwanzig:
On 12/5/2022 1:36 PM, Laine wrote:
If you are able to generate “chapters.txt” but observe an overabundance
of information in that file, you might try the options that I used to
get
just the video title and a list of the chapters.
'grep' does
Am 25.11.2022 um 08:02 schrieb Jim Ruxton:
I am on Ubuntu 22.04 and trying to combine 2 cameras into one stream that
is being sent to a loopback device. The command appears to work but I can't
see the stream in any way. I've tried VLC Cheese ffplay guvcview and none
of them work. The command I
Am 22.11.2022 um 02:15 schrieb Jim DeLaHunt:
On 2022-11-20 00:15, Michael Koch wrote:
Am 20.11.2022 um 02:39 schrieb list+ffmpeg-u...@jdlh.com:
On 2022-11-19 07:34, Michael Koch wrote:
Am 03.11.2022 um 10:10 schrieb Paul B Mahol:
Some things in sea of myriad others:
[...]
Why you claim
Am 20.11.2022 um 02:39 schrieb list+ffmpeg-u...@jdlh.com:
On 2022-11-19 07:34, Michael Koch wrote:
Am 03.11.2022 um 10:10 schrieb Paul B Mahol:
Some things in sea of myriad others:
[...]
Why you claim that datascope does not support >8 bit formats where in
fact it does support it?
In s
Am 03.11.2022 um 10:10 schrieb Paul B Mahol:
Some things in sea of myriad others:
[...]
Why you claim that datascope does not support >8 bit formats where in
fact it does support it?
In some cases datascope works with 16-bit data, but not in all cases.
Here is an example where it doesn't
Am 13.11.2022 um 22:52 schrieb Reino Wijnsma:
On 2022-11-13T20:45:42+0100, Michael Koch wrote:
ffmpeg -f lavfi -i testsrc2 -f nut | ffplay -
Btw, I hope you know that ffplay can do this too:
ffplay -f lavfi testsrc2
yes, that's known.
Michael
Am 13.11.2022 um 22:47 schrieb Reino Wijnsma:
On 2022-11-13T22:18:15+0100, Michael Koch wrote:
Is the "-" at the end an (undocumented) option of FFplay, or is it a batch file
operator?
The first, I guess.
I've found 'opusenc' (Opus command-line encoder) to print:
Usage: opusen
Am 13.11.2022 um 21:57 schrieb Reino Wijnsma:
Hello Michael,
On 2022-11-13T20:45:42+0100, Michael Koch wrote:
ffmpeg -f lavfi -i testsrc2 -f nut | ffplay -
This command line works fine and I have used it many times.
It shouldn't, because you forgot a "-" after "-f nut&qu
I have a question about piping from FFmpeg to FFplay (in a Windows batch
file):
ffmpeg -f lavfi -i testsrc2 -f nut | ffplay -
This command line works fine and I have used it many times. But I don't
know what's the meaning of the - character after ffplay. Does this -
character belong to the
Am 12.11.2022 um 12:39 schrieb Cecil Westerhof via ffmpeg-user:
I have a few videos that have a 50 fps. But the computer I am playing
them on cannot handle that properly. Can I use ffmpeg to change the
fps to 25? While still having the same length.
sure, that's easy:
ffmpeg -i in.mp4 -r 25
Am 03.11.2022 um 20:17 schrieb Bartosz Trzebuchowski:
Hi,
I’m completely new to ffmpeg and have 2 questions:
1. How can I convert 16:9 movies to 2.35:1? My projector can’t scale down and
16:9 movies run outside my 2.35:1 canvas at the top and the bottom. I need to
black out top and bottom so
Am 03.11.2022 um 10:10 schrieb Paul B Mahol:
Your book is full or factual errors,
Notice to anyone: do not use this thing for anything serious.
Thank you for so much promotion for my book.
Sure, it's likely that in more than 900 pages there are a few errors. We
all make errors. If anyone finds
Am 03.11.2022 um 10:10 schrieb Paul B Mahol:
On 11/3/22, Michael Koch wrote:
Am 03.11.2022 um 09:35 schrieb Paul B Mahol:
On 10/11/20, Michael Koch wrote:
Am 29.09.2020 um 22:54 schrieb Michael Koch:
Hello all,
I've programmed a C# workaround for stabilization of 360° videos
Am 03.11.2022 um 09:35 schrieb Paul B Mahol:
On 10/11/20, Michael Koch wrote:
Am 29.09.2020 um 22:54 schrieb Michael Koch:
Hello all,
I've programmed a C# workaround for stabilization of 360° videos. The
procedure is as follows:
1. FFmpeg: From each frame of the equirectangular input video
Am 29.10.2022 um 12:02 schrieb Paul B Mahol:
On 10/29/22, Michael Koch wrote:
This command line works as expected:
ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*sin(2)*sin(2)" -ac 2 -t 5
-y out.wav
Why does it no longer work when I replace sin(2)*sin(2) by pow(sin(2),2) ?
ffmpe
This command line works as expected:
ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*sin(2)*sin(2)" -ac 2 -t 5
-y out.wav
Why does it no longer work when I replace sin(2)*sin(2) by pow(sin(2),2) ?
ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*pow(sin(2),2)" -ac 2 -t 5
-y out.wav
Is this a
Am 27.10.2022 um 21:57 schrieb Clay via ffmpeg-user:
Dumb ffmpeg question alert:
What is a "pad" in the context of an "input pad", an "output pad" and a
"filter pad"?
"input pad" and "output pad" are described in chapter 32:
https://www.ffmpeg.org/ffmpeg-all.html#Filtergraph-description
Am 25.10.2022 um 09:29 schrieb Naveen.B:
What do you want to do with the RAW video? You know that you can't play
it with most players?
Yes, I know it cannot be played with most of th players, I need to see the
size of the RAW video and make some compression on it for our further
analysis.
Am 24.10.2022 um 18:36 schrieb Naveen.B:
Are you sure that there is a file CapturedImage-000.raw ?
You forgot to specify the input pixel format.
Many parameters are missing for the raw output. But the error message is
from the input.
Do you really want raw video? That's not the easiest format
Am 24.10.2022 um 17:50 schrieb Naveen.B:
Hello Team,
I have managed to convert raw Images files to .mp4 video,
I need to encode to a RAW video instead, could you please let me know
the
command for this?
RAW Image file is,
resolution - 1600x1300
fps-30
bit depth-16bit
Do not specify a
On a website (1) I found the idea that a TIF file can be converted to a
DNG file just by adding some tags and renaming it. Let's test it. Make a
16-bit TIF file:
ffmpeg -f lavfi -i nullsrc=s=320x320,format=yuv444p10le -vf
geq=lum='X/W*32+32*floor(Y/H*32)':cr=512:cb=512,format=rgb48be -frames
Am 24.10.2022 um 14:29 schrieb Naveen.B:
On 24 Oct 2022, at 12:52, Naveen.B wrote:
Hello Team,
I have managed to convert raw Images files to .mp4 video,
I need to encode to a RAW video instead, could you please let me know the
command for this?
RAW Image file is,
resolution - 1600x1300
The -s option in your command line is for the output size because it's
written after -i.
You must also set the input size before -i.
Your RAW image contains only pixel data and no header for size and pixel
format.
I din't understand the header for size and pixel format, width error is
Am 19.10.2022 um 21:50 schrieb Naveen.B:
I got an error by trying this command. Could you kindly let me know if
this
is feasible?
Always always always include the complete output of ffmpeg when asking
for
help. For one, we don't know what error you got.
Am 19.10.2022 um 21:26 schrieb Naveen.B:
I got an error by trying this command. Could you kindly let me know if
this
is feasible?
Always always always include the complete output of ffmpeg when asking for
help. For one, we don't know what error you got.
Am 07.10.2022 um 20:28 schrieb Michael Koch:
Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz:
i have 2 inputs
first input image -i logo.png
second input dshow webcam -f dshow -i video="my webcam"
is it possible to show 5 seconds logo and and subsequently start webcam?
it can al
Am 07.10.2022 um 21:32 schrieb i...@mbsoft.biz:
I have tried
ffmpeg.exe" -loglevel quiet -analyzeduration 0 -probesize 32 -report -i
"e:\\logo.png" -f dshow -video_size 1280x720 -framerate 30
-video_device_number 0 -i "video=Full HD 1080P PC Camera" "sendcmd='5.0"
streamselect map
Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz:
i have 2 inputs
first input image -i logo.png
second input dshow webcam -f dshow -i video="my webcam"
is it possible to show 5 seconds logo and and subsequently start webcam?
it can also be done with "streamselect" filter, have a look at the
Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz:
i have 2 inputs
first input image -i logo.png
second input dshow webcam -f dshow -i video="my webcam"
is it possible to show 5 seconds logo and and subsequently start webcam?
Here is an example for switching between two inputs after 5
Am 18.09.2022 um 18:50 schrieb Carl Zwanzig:
On 9/18/2022 5:28 AM, Michael Koch wrote:
It seems the crop filter did change the pixel format to GBR.
Which brings the follow-up question- why did crop...?
geq or crop, one of them.
IIRC, some/many/most/all filters operate on a limited number
Am 18.09.2022 um 13:36 schrieb Michael Koch:
Why does datascope show the color components in the unusual order GBR
(from top to bottom)? It's confusing.
Can the order be changed to RGB?
ffmpeg -f lavfi -i color=black:s=26x6 -lavfi
format=rgb24,geq=r='clip(64*mod(X,5),0,255)':g='clip(64*Y
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