Am 15.11.2019 um 16:35 schrieb David Previs:
Hello
I have the following Filters:
Watermark:
"overlay=x=(main_w-overlay_w)/2:y=(main_h-overlay_h)/2"
Text Overlay:
drawtext="fontsize=24:fontcolor=00@0.5:fontfile=/Windows/Fonts/Arial.ttf
:text='Test
Am 15.11.2019 um 16:53 schrieb David Previs:
-y -i "c:\ffmpeg\Black.mp4" -i "C:\pw\temp\watermark99.png" -filter_complex
"overlay=x=(main_w-overlay_w)/2:y=(main_h-overlay_h)/2",
drawtext="fontsize=24:fontcolor=00@0.5:fontfile=/Windows/Fonts/Arial.ttf
:text='Huntley Film
Am 20.10.2019 um 23:56 schrieb arthur brogard via ffmpeg-user:
I have been trying to convert a bunch of mkv files to mp4 using ffmpeg in batch
mode via a .bat file but I can't get it right.
I've followed a number of suggested commands from various hits I've got on
google but none of them work.
set OUT=%IN:mkv=mp4%
please note that this renaming will give unexpected results if "mkv" is
also part of the filename, for example
aamkv.mkv will be renamed to
aamp4.mp4
If someone knows a solution to this problem, please let us know.
Michael
Hello,
FFmpeg can read PGM (Portable Gray Map) files that are either ASCII
coded (beginning with "P2") or binary coded (beginning with "P5"). When
writing a PGM file, the default format is binary. Is it also possible to
write an ASCII coded PGM file?
Thanks,
Michael
Am 26.11.2019 um 09:55 schrieb Carl Eugen Hoyos:
Am 26.11.2019 um 09:40 schrieb Michael Koch :
Am 26.11.2019 um 07:11 schrieb Carl Eugen Hoyos:
Am 25.11.2019 um 23:36 schrieb Michael Koch :
[mp4 @ 006288c0] Frame rate very high for a muxer not efficiently
supporting it.
Please
Am 26.11.2019 um 07:11 schrieb Carl Eugen Hoyos:
Am 25.11.2019 um 23:36 schrieb Michael Koch :
[mp4 @ 006288c0] Frame rate very high for a muxer not efficiently
supporting it.
Please consider specifying a lower framerate, a different muxer
Did you see this?
I did not read the whole
Thanks for your suggestion. Adding -r 25 does indeed solve the problem.
Although I don't understand why it is required. The input framerate is
25 and it's detected correctly when I use the simpler filter chain.
Ah, I know why this happens, you need to use settb=1/FPS filter after vstack.
This
Hello all,
I'd like to draw a curve of the RMS audio level with the following
command line. The problem is that the output is a black video and no
curve is visible.
c://ffmpeg/ffmpeg -i P1000479.mov -lavfi astats,adrawgraph=
m1="lavfi.astats.RMS level
Am 24.11.2019 um 22:17 schrieb Michael Koch:
Hello all,
I'd like to draw a curve of the RMS audio level with the following
command line. The problem is that the output is a black video and no
curve is visible.
c://ffmpeg/ffmpeg -i P1000479.mov -lavfi astats,adrawgraph=
m1="lavfi.astat
Am 26.11.2019 um 17:48 schrieb Michael Koch:
Am 26.11.2019 um 17:32 schrieb Michael Koch:
Am 26.11.2019 um 14:26 schrieb Paul B Mahol:
I have a new example with testsrc2 and anoisesrc. There is no input
file
required for reproducing.
There are two graphs: The first one uses signalstats
Am 26.11.2019 um 17:32 schrieb Michael Koch:
Am 26.11.2019 um 14:26 schrieb Paul B Mahol:
I have a new example with testsrc2 and anoisesrc. There is no input
file
required for reproducing.
There are two graphs: The first one uses signalstats and drawgraph, and
the second one uses astats
Am 26.11.2019 um 14:26 schrieb Paul B Mahol:
I have a new example with testsrc2 and anoisesrc. There is no input file
required for reproducing.
There are two graphs: The first one uses signalstats and drawgraph, and
the second one uses astats and adrawgraph. The problem is that the two
graphs
Am 25.11.2019 um 12:04 schrieb Paul B Mahol:
On 11/25/19, Michael Koch wrote:
Am 25.11.2019 um 00:08 schrieb Michael Koch:
I just found the solution to this problem myself:
astats=metadata=1:reset=1,adrawgraph=m1=lavfi.astats.1.RMS_level
The underline character is missing
Am 25.11.2019 um 00:08 schrieb Michael Koch:
I just found the solution to this problem myself:
astats=metadata=1:reset=1,adrawgraph=m1=lavfi.astats.1.RMS_level
The underline character is missing in the documentation, where the
option is called "RMS level dB". Same problem for
Am 25.11.2019 um 23:36 schrieb Michael Koch:
Am 25.11.2019 um 22:46 schrieb Paul B Mahol:
On 11/25/19, Michael Koch wrote:
Am 25.11.2019 um 12:04 schrieb Paul B Mahol:
On 11/25/19, Michael Koch wrote:
Am 25.11.2019 um 00:08 schrieb Michael Koch:
I just found the solution to this problem
Am 25.11.2019 um 22:46 schrieb Paul B Mahol:
On 11/25/19, Michael Koch wrote:
Am 25.11.2019 um 12:04 schrieb Paul B Mahol:
On 11/25/19, Michael Koch wrote:
Am 25.11.2019 um 00:08 schrieb Michael Koch:
I just found the solution to this problem myself:
astats=metadata=1:reset=1,adrawgraph=m1
Hi,
in the documentation is a new example for afftfilt:
afftfilt="real='hypot(re,im)*sin(0)':imag='hypot(re,im)*cos(0)':win_size=512:overlap=0.75"
What's the point of multiplying by sin(0) and cos(0)? Isn't this exactly
the same as
afftfilt="real=0:imag='hypot(re,im)':win_size=512"
Michael
Hi,
there seem to be some rounding (or +-1) errors in the v360 filter, when
converting from double fisheye to equirectangular. Can be reproduced as
follows:
ffmpeg -f lavfi -i color=red:size=40x40 -f lavfi -i
color=green:size=40x40 -lavfi
"[0][1]hstack,v360=input=dfisheye:output=e" -frames
Am 25.02.2020 um 11:37 schrieb Paul B Mahol:
On 2/25/20, Paul B Mahol wrote:
On 2/25/20, Michael Koch wrote:
Am 25.02.2020 um 10:40 schrieb Paul B Mahol:
On 2/25/20, Michael Koch wrote:
Paul,
On 2/19/20, Michael Koch wrote:
Hi,
would it be possible to allow expressions for the yaw
Am 26.02.2020 um 16:48 schrieb Michael Koch:
Hi,
I'd like to know if someone can reproduce this problem:
Make a 6s video with audio:
ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y
video.mp4
The video plays correctly and has 6s of audio.
Now mix the audio channels from
Am 01.03.2020 um 10:16 schrieb Mark Filipak:
On 03/01/2020 03:55 AM, Paul B Mahol wrote:
On 3/1/20, Mark Filipak wrote:
I have been looking for months, on and off. Is there any place that
shows how to form a working ffmpeg command line? I'm trying to figure
out how to use a fieldmatch filter.
Am 01.03.2020 um 11:30 schrieb Mark Filipak:
Then please test the following (assuming your input is actually
telecined, if it is not the command is slow and makes little sense.
Remember that soft-telecined is progressive and not telecined from
FFmpeg‘s point of view):
Not telecined from
Am 04.03.2020 um 12:37 schrieb Paul B Mahol:
On 3/4/20, Michael Koch wrote:
Hi,
is there any known workaround for making a red-shift or a blue-shift? I
mean shifting the visible spectrum towards red or blue. In the middle of
the spectrum this can be realized by the "hue&qu
Am 04.03.2020 um 12:44 schrieb Mark Filipak:
On 03/04/2020 05:52 AM, Michael Koch wrote:
Hi,
is there any known workaround for making a red-shift or a blue-shift?
I mean shifting the visible spectrum towards red or blue. In the
middle of the spectrum this can be realized by the "hue&qu
Hi,
is there any known workaround for making a red-shift or a blue-shift? I
mean shifting the visible spectrum towards red or blue. In the middle of
the spectrum this can be realized by the "hue" filter, but at the end of
the spectrum I want a different behaviour. I want a shift instead of a
Is there a difference between the video filters "copy" and "null"?
Michael
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Am 27.02.2020 um 00:14 schrieb Paul B Mahol:
On 2/27/20, Michael Koch wrote:
Am 25.02.2020 um 11:37 schrieb Paul B Mahol:
On 2/25/20, Paul B Mahol wrote:
On 2/25/20, Michael Koch wrote:
Am 25.02.2020 um 10:40 schrieb Paul B Mahol:
On 2/25/20, Michael Koch wrote:
Paul,
On 2/19/20
Am 27.02.2020 um 11:27 schrieb Mick Finn:
Ok sorry about that but the thread had as an assumption a feature most of vr360
commands maybe you have some idea where that is documented?
As far as I know, there are only two sources for v360 documentation:
1. The official documentation
Am 23.02.2020 um 18:20 schrieb Paul B Mahol:
On 2/23/20, Michael Koch wrote:
Hi,
there seem to be some rounding (or +-1) errors in the v360 filter, when
converting from double fisheye to equirectangular. Can be reproduced as
follows:
ffmpeg -f lavfi -i color=red:size=40x40 -f lavfi -i
color
Paul,
On 2/19/20, Michael Koch wrote:
Hi,
would it be possible to allow expressions for the yaw, pitch and roll
parameters in the v360 filter? I have a project where I need these
angles to be a function of time.
Nope, would make filter 10x times slower.
Would it always slow down
Am 25.02.2020 um 10:40 schrieb Paul B Mahol:
On 2/25/20, Michael Koch wrote:
Paul,
On 2/19/20, Michael Koch wrote:
Hi,
would it be possible to allow expressions for the yaw, pitch and roll
parameters in the v360 filter? I have a project where I need these
angles to be a function of time
Am 25.02.2020 um 11:37 schrieb Paul B Mahol:
On 2/25/20, Paul B Mahol wrote:
On 2/25/20, Michael Koch wrote:
Am 25.02.2020 um 10:40 schrieb Paul B Mahol:
On 2/25/20, Michael Koch wrote:
Paul,
On 2/19/20, Michael Koch wrote:
Hi,
would it be possible to allow expressions for the yaw
I'd like to stitch two fisheye videos together to an equirectangular
video. The input videos have larger than 180° field of view, so that
there is an overlap region and I want to use the maskedmerge filter for
merging the videos.
My first (successful) test is with png images:
First create the
Am 03.03.2020 um 10:52 schrieb Paul B Mahol:
Hi,
On 3/3/20, Michael Koch wrote:
I'd like to stitch two fisheye videos together to an equirectangular
video. The input videos have larger than 180° field of view, so that
there is an overlap region and I want to use the maskedmerge filter
Hi,
I'd like to know if someone can reproduce this problem:
Make a 6s video with audio:
ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y video.mp4
The video plays correctly and has 6s of audio.
Now mix the audio channels from two of these input videos:
ffmpeg -i video.mp4 -i
Hello all,
is it possible to track a moving object with find_rect and write the x,y
coordinates to a file?
Thanks,
Michael
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Does FFplay have a keyboard shortcut to toggle the subtitles on / off
while playing?
In the documentation I found only "t" for cycling the subtitle channel.
I'm asking because I have a MP4 file with subtitles, created with FFmpeg.
The subtitles are visible in VLC player, but not in FFplay.
Am 01.02.2020 um 22:15 schrieb Paul B Mahol:
On 2/1/20, Michael Koch wrote:
Am 01.02.2020 um 21:38 schrieb Paul B Mahol:
On 2/1/20, Michael Koch wrote:
Am 01.02.2020 um 21:16 schrieb Paul B Mahol:
On 2/1/20, Michael Koch wrote:
I want to use sendcmd to set the x,y coordinates
Console output:
F:\Test>c:\ffmpeg\ffmpeg -i main.mov -i lp.mp4 -filter_complex "[1
]scale=100:100,sendcmd=f=test.cmd[2];[0][2]overlay=x='':y=''" -q:v 2 -t
4 -y out
x="":y="" are invalid arguments. They must be valid, even if they not
gonna be used later.
now it works. Thank you!
Should
Am 01.02.2020 um 21:16 schrieb Paul B Mahol:
On 2/1/20, Michael Koch wrote:
I want to use sendcmd to set the x,y coordinates of the overlay filter.
If I write sendcmd before overlay, I get this error message:
Too many inputs specified for the "sendcmd" filter.
But the two inputs ar
I want to use sendcmd to set the x,y coordinates of the overlay filter.
If I write sendcmd before overlay, I get this error message:
Too many inputs specified for the "sendcmd" filter.
But the two inputs are required for the overlay filter. How can this
problem be solved?
Console output is
Am 01.02.2020 um 21:38 schrieb Paul B Mahol:
On 2/1/20, Michael Koch wrote:
Am 01.02.2020 um 21:16 schrieb Paul B Mahol:
On 2/1/20, Michael Koch wrote:
I want to use sendcmd to set the x,y coordinates of the overlay filter.
If I write sendcmd before overlay, I get this error message:
Too
Am 01.02.2020 um 22:35 schrieb Paul B Mahol:
On 2/1/20, Michael Koch wrote:
Console output:
F:\Test>c:\ffmpeg\ffmpeg -i main.mov -i lp.mp4 -filter_complex "[1
]scale=100:100,sendcmd=f=test.cmd[2];[0][2]overlay=x='':y=''" -q:v 2 -t
4 -y out
x="":y="" are inva
Am 31.01.2020 um 19:09 schrieb Paul B Mahol:
On 1/31/20, Michael Koch wrote:
Paul,
is there any chance that the new xfade filter and the acrossfade filter
could be harmonized, so that they accept the same parameters?
The acrossfade filter does always fade near the end of the first input
Paul,
is there any chance that the new xfade filter and the acrossfade filter
could be harmonized, so that they accept the same parameters?
The acrossfade filter does always fade near the end of the first input
stream. Only the duration must be specified.
The xfade filter expects a duration
Is it correct that the "displace" filter allows only displacements in
the [-128 ... +127] range?
Michael
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Am 04.02.2020 um 11:53 schrieb Paul B Mahol:
On 2/3/20, Michael Koch wrote:
Is it correct that the "displace" filter allows only displacements in
the [-128 ... +127] range?
It works only with 8bit pixel formats, so yes.
Locally I have warp filter, which works by specifying 2D w
Paul,
Single-fisheye is done as output only currently, user need to set both
h_fov and v_fov.
I'm just testing the new single fisheye options and as far as I have
tested, everything looks good.
Would it be possible to add an option for filling the unused area with a
user-defined color,
I've written a summary into my book in chapter 3.16 (but chapter
numbering may change in future):
http://www.astro-electronic.de/FFmpeg_Book.pdf
Book contains obsolete info about v360 filter, please fix it.
Done. Many new examples for the v360 filter added to chapters 2.48 to 2.55
Am 19.02.2020 um 14:04 schrieb Paul B Mahol:
On 2/19/20, Michael Koch wrote:
Hi,
would it be possible to allow expressions for the yaw, pitch and roll
parameters in the v360 filter? I have a project where I need these
angles to be a function of time.
Nope, would make filter 10x times slower
Hi,
would it be possible to allow expressions for the yaw, pitch and roll
parameters in the v360 filter? I have a project where I need these
angles to be a function of time.
Michael
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Am 09.02.2020 um 23:51 schrieb S Andreason:
Hi,
I continued building and rendering after asking some questions last
week. After 6 days x10 hours per day of
(render,test,measure,edit,repeat) I finally was able to publish my
video. In doing so I made it easy to duplicate the bugs I have been
Am 10.02.2020 um 09:35 schrieb Paul B Mahol:
On 2/10/20, Michael Koch wrote:
Am 09.02.2020 um 23:51 schrieb S Andreason:
Hi,
I continued building and rendering after asking some questions last
week. After 6 days x10 hours per day of
(render,test,measure,edit,repeat) I finally was able
Am 10.02.2020 um 10:54 schrieb Thilo Borgmann:
We would like to encourage everyone visiting the CLT to bring us sample files
and/or command lines that show suspicious or buggy behavior - this will be your
change to get your bug fixed right away!
Sounds interesting. I'll visit and bring some
Am 23.02.2020 um 18:20 schrieb Paul B Mahol:
On 2/23/20, Michael Koch wrote:
Hi,
there seem to be some rounding (or +-1) errors in the v360 filter, when
converting from double fisheye to equirectangular. Can be reproduced as
follows:
ffmpeg -f lavfi -i color=red:size=40x40 -f lavfi -i
color
Am 20.02.2020 um 11:07 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
I'd like to understand how the new "fill" option in the remap filter works.
What is an "unmapped pixel"? How is it possible that pixels are
unmapped, if the xmap and ymap files have the same size
I'd like to understand how the new "fill" option in the remap filter works.
What is an "unmapped pixel"? How is it possible that pixels are
unmapped, if the xmap and ymap files have the same size as the output
image? Is a pixel "unmapped" if it has invalid coordinates (negative or
too big) in
Am 20.02.2020 um 12:49 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
Am 20.02.2020 um 11:07 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
I'd like to understand how the new "fill" option in the remap filter
works.
What is an "unmapped pixel"? How is it
Am 20.02.2020 um 12:49 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
Am 20.02.2020 um 11:07 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
I'd like to understand how the new "fill" option in the remap filter
works.
What is an "unmapped pixel"? How is it
Am 20.02.2020 um 13:47 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
Am 20.02.2020 um 12:49 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
Am 20.02.2020 um 11:07 schrieb Paul B Mahol:
On 2/20/20, Michael Koch wrote:
I'd like to understand how the new "fill&qu
Paul,
Nevertheless I have the same problem as the original poster, also when I
add :format=rgb. Something is wrong with the x,y calculations in the
overlay filter. In my example I'm using sendcmd to set x and y. The
coordinates are sometimes off by a few pixels. At the moment my command
line
Am 10.02.2020 um 18:31 schrieb Michael Koch:
Paul,
Nevertheless I have the same problem as the original poster, also
when I
add :format=rgb. Something is wrong with the x,y calculations in the
overlay filter. In my example I'm using sendcmd to set x and y. The
coordinates are sometimes off
Am 13.02.2020 um 02:36 schrieb Hans Carlson:
Is it possible to stretch/scale only the center part of an overlay image?
I don't mean the middle section of a video, I mean only the center
part of a single image (png) that will be overlayed onto a background,
such that the left and right sides
Hello all,
can FFmpeg or FFplay be used for playing a video (without audio) and
exactly simultaneously record an audio file? I mean for making sound
effects for the video. If this isn't possible, is there any other free
software that can do it?
Thanks
Michael
Hello Gyan,
can FFmpeg or FFplay be used for playing a video (without audio) and
exactly simultaneously record an audio file? I mean for making sound
effects for the video. If this isn't possible, is there any other
free software that can do it?
Basic syntax would be,
ffmpeg -re -i
My second test:
ffmpeg -re -i test.mp4 -f dshow -channels 2 -i audio="Mikrofon
(Realtek High Definiti" -y -map 1:a audio.wav -map 0:v -f sdl2 -
This command line has two problems:
1. The video doesn't play continuously, it's stop-and-go. May be my
notebook has not enough computing power?
Hello Gyan,
I did try the above example (with some changes) but it has another
problem: FFplay can't be stopped when the video has ended, and it
uses the full screen. Which means I can't see the console window and
can't close it. FFmpeg can only be stopped by the task manager.
Looks like
Am 19.01.2020 um 13:54 schrieb Paul B Mahol:
On 1/19/20, Michael Koch wrote:
Hello Gyan,
I did try the above example (with some changes) but it has another
problem: FFplay can't be stopped when the video has ended, and it
uses the full screen. Which means I can't see the console window
Hello,
I've just found a problem that can be reproduced as follows:
Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when
played.
ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y video.mp4
Step 2: Make a 10 seconds audio file with silence and a short
Am 19.01.2020 um 21:56 schrieb Paul B Mahol:
On 1/19/20, Michael Koch wrote:
Am 19.01.2020 um 21:01 schrieb Paul B Mahol:
On 1/19/20, Michael Koch wrote:
Hello,
I've just found a problem that can be reproduced as follows:
Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok
Am 19.01.2020 um 21:01 schrieb Paul B Mahol:
On 1/19/20, Michael Koch wrote:
Hello,
I've just found a problem that can be reproduced as follows:
Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when
played.
ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y
Am 09.03.2020 um 21:49 schrieb Mark Filipak:
On 03/09/2020 03:39 PM, hydra3...@gmail.com wrote:
Well, I'm a dumb user and google gave me LOTS and LOTS of
commandlines that work - simply filter the google results by the
"date in the last year" to be sure you get the latest syntax. Lots.
You
Am 09.03.2020 um 23:31 schrieb Mark Filipak:
On 03/09/2020 05:30 PM, Michael Koch wrote:
Am 09.03.2020 um 21:49 schrieb Mark Filipak:
On 03/09/2020 03:39 PM, hydra3...@gmail.com wrote:
Well, I'm a dumb user and google gave me LOTS and LOTS of
commandlines that work - simply filter the google
Am 09.04.2020 um 11:36 schrieb atticus via ffmpeg-user:
Hi there,
I'm scaling a video by with this filter:
-vf "scale=720:320:force_original_aspect_ratio=decrease"
which works perfectly fine, since I can input the my desired resolution and
ffmpeg decides on its own which dimension should be
Hello,
I want to add a +-10 pixels random horizontal jitter to video lines.
This is the first test:
c:\ffmpeg\ffmpeg -f lavfi -i testsrc2=size=vga -vf
format=gray,geq=lum='lum(X-10+20*random(0),Y)' -t 3 -y out1.mp4
This works, but it's a pixel-wise jitter and that's not what I want. I
Am 18.04.2020 um 08:41 schrieb Michael Koch:
Am 18.04.2020 um 00:54 schrieb Roger Pack:
In my test the FFT method has a shorter delay time than the amultiply
method.
I just found out that the delay can be minimized by setting
-audio_buffer_size to a very small value (10ms).
Delay is now about
Am 18.04.2020 um 00:54 schrieb Roger Pack:
In my test the FFT method has a shorter delay time than the amultiply
method.
I just found out that the delay can be minimized by setting
-audio_buffer_size to a very small value (10ms).
Delay is now about 0.5 seconds. Short enough to see and hear the
Am 18.04.2020 um 19:30 schrieb Michael Glenn Williams:
Wow that is so cool! Will ffmpeg generate ultrasound sounds to, or do we
know of a plugin or other that could do that, then feed the signal to
ffmpeg?
Sure, you can generate ultrasound with FFmpeg. Try the first example in
chapter 3.24.
Am 18.04.2020 um 16:52 schrieb Michael Glenn Williams:
The subject line about ultrasound caught me eye on this thread that woke up
from last year.
Can anyone tell us what the original interest in ffmpeg and ultrasound is?
Well, you can use FFmpeg to convert ultrasound to lower frequencies, for
Am 18.04.2020 um 18:25 schrieb Ted Park:
I don't know where I can find bats nearby so I couldn't try it but how
does it work? The book makes it sound like you can use any mic, even
one built into a laptop for this? I suppose that's plausible looking
at a typical mic's frequency response graph,
Am 08.04.2020 um 04:48 schrieb Mark Filipak:
Start again after a good sleep.
Re:
https://ffmpeg.org/pipermail/ffmpeg-user/attachments/20200407/4556ce6a/attachment.mpv
Kindly play 'attachment'. Got any ideas what's causing the image trails?
fmpeg -i "M:\Test Videos\23.976p.mkv" \
Am 08.04.2020 um 08:09 schrieb Michael Koch:
Am 08.04.2020 um 04:48 schrieb Mark Filipak:
Start again after a good sleep.
Re:
https://ffmpeg.org/pipermail/ffmpeg-user/attachments/20200407/4556ce6a/attachment.mpv
Kindly play 'attachment'. Got any ideas what's causing the image trails?
fmpeg
Hello,
I want to show the content of a credits file scrolling up.The file
contains many lines of different lengths.
drawtext=textfile=credits.txt:x=(w-text_w)/2:y=h-100*t
The variable text_w is the width of the longest line in the text file.
This line is center-aligned in the frame, and all
Mark,
"recurse" works if your timestamps are correct.
Carl Eugen said that, too. How could the timestamps be wrong?
Well, I think the timestamp isn't "wrong", but it's "not as you expect".
If a filter has two inputs and the input frames have different
timestamps, then what's the
Am 21.04.2020 um 04:09 schrieb Mark Filipak:
Hey,
I have a question for you knowledgeable folks.
I've seen where some use the term "keyframe" but I've never seen a
definition. It's not terribly important, but here goes...
I've assumed -- you know how good I am at that! -- that a keyframe is
Am 21.04.2020 um 01:39 schrieb Mark Filipak:
To submit a trac ticket on the 'pp' filter, I need a p24 video that's
over 10 minutes, I need to test using that video, and then upload the
file and update the ticket to 'reopen'.
It has to be non-copyrighted material.
Any ideas?
ffmpeg -f lavfi
I now appreciate that 'blend' has a "preferred" input similar to 'overlay',
but that behavior is not
documented. In the case of 'overlay', the name "main" doesn't convey that
meaning, and in the case
of 'blend', that behavior is not documented at all. Both documentations
should explain how
Am 21.04.2020 um 11:07 schrieb Paul B Mahol:
On 4/21/20, Michael Koch wrote:
I now appreciate that 'blend' has a "preferred" input similar to
'overlay',
but that behavior is not
documented. In the case of 'overlay', the name "main" doesn't convey that
meaning, and i
that was not happening. Apparently it does
recurse, but only if you connect certain pads to certain other pads.
I don't understand what you mean by "recursively".
Specifically, it depends on how you 'wire up' a 'blend' filter. I
learned that from Michael Koch after he suggested that I reverse the
c
Mark,
cross compiling FFmpeg for Windows is -- in my opinion -- very
difficult. That's something for people who have a lot of experience.
There is no binaries at ffmpeg.org.
https://ffmpeg.org/download.html links to
https://ffmpeg.zeranoe.com/builds/ but the ffmpeg build there
apparently
Am 17.04.2020 um 09:44 schrieb Mark Filipak:
On 04/17/2020 02:41 AM, Michael Koch wrote:
Am 17.04.2020 um 08:02 schrieb Mark Filipak:
Thanks to pdr0 -at- shaw.ca, My quest for the (nearly perfect)
p24-to-p60 transcode has concluded.
But remaining is an ffmpeg behavior that seems (to me
Am 17.04.2020 um 02:18 schrieb John Riselvato:
Oh interesting, I appreciate you explaining that to me.
There is some documentation here:
https://www.ffmpeg.org/git-howto.html
If you figure out how git works, that would be a nice new chapter for
your book.
Michael
Am 17.04.2020 um 08:02 schrieb Mark Filipak:
Thanks to pdr0 -at- shaw.ca, My quest for the (nearly perfect)
p24-to-p60 transcode has concluded.
But remaining is an ffmpeg behavior that seems (to me) to be key to
understanding ffmpeg architecture, to wit: The characteristics of
frame
Am 06.04.2020 um 12:39 schrieb Mark Filipak:
Here:
https://ffmpeg.org/ffmpeg-filters.html#overlay-1
is found this example:
ffmpeg -i input -i logo -filter_complex
'overlay=10:main_h-overlay_h-10' output
^
What is
Am 06.04.2020 um 12:00 schrieb Ted Park:
Hi,
I am experiencing a no-warning, system level, dead Macintosh II bitmap logo,
sad Finder face icon type HARD CRASH every time I run a ffplay command.
The exact command line is the following:
% ffplay -f lavfi -i "anoisesrc[a1];sine,[a1]amix"
is
Am 15.03.2020 um 11:13 schrieb Dan Bridges:
Is it possible to "remove" everything in a video except a specific
color (or maybe a range... ie close to a specific color. By "remove" I
mean covert every that is NOT the color(s) I want to black or
transparent. I have a video that contains a
Am 26.03.2020 um 19:59 schrieb Carl Eugen Hoyos:
Am Do., 26. März 2020 um 19:34 Uhr schrieb Michael Koch
:
I have a suggestion for improvement for the drawtext filter.
If the text is read from a file, it must be in UTF-8 format. In Windows,
many text editors (including Notepad) insert a 3-byte
Hi,
I have a suggestion for improvement for the drawtext filter.
If the text is read from a file, it must be in UTF-8 format. In Windows,
many text editors (including Notepad) insert a 3-byte "Byte order mark"
at the beginning of the file. This is described here:
Am 27.03.2020 um 11:07 schrieb foxtail mega:
Clarification regarding information (x,y for overlay filter).
I am using ffmpeg for mobile devices so i am using flutter-ffmpeg. Now
i am using dart language for supplying x and y co-ordinates to ffmpeg
instance. Issue is, after i run the ffmpeg
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