-and-use-ffmpeg-in-windows/
Regards,
Gyan
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that the
first displayed frame has a dts of 0.
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Gyan
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a entry in the elst edit table is the cause
of the issue. My question is whether it is possible to not have that happen
via the ffmpeg/libav invocation, or whether this is a problem with the
source material?
Reset the pts i.e. first packet of video stream should have pts 0.
Regards,
Gyan
On 2024-04-09 05:58 pm, Bouke / edit 'B wrote:
On 9 Apr 2024, at 13:45, Gyan Doshi wrote:
On 2024-04-09 02:46 pm, Bouke / edit 'B wrote:
For my work I try an install of FFmpeg by running it without any params.
It used to be that the return would include ‘Hyper fast’.
However
On 2024-04-09 02:46 pm, Bouke / edit 'B wrote:
For my work I try an install of FFmpeg by running it without any params.
It used to be that the return would include ‘Hyper fast’.
However, the current binaries from Gyan do not include that, but state
‘Universal media encoder
On 2024-03-08 11:58 am, Gyan Doshi wrote:
On 2024-03-08 06:06 am, Jim Worrall wrote:
I’ve been building ffmpeg on a Mac since 2017, and this is the first
time I’ve run into this kind of problem. I pulled the latest git
head today. After getting all the dependencies set up, I configure
--enable-libfribidi \
--enable-libass \
--enable-libzimg
Then the 'make' command fails pretty quickly. Starting with the first error:
The library major versions have been bumped so there's a change in ABI /
API.
Do a make distclean and rerun configure.
Regards,
Gyan
libavdevice/avfounda
On 2024-02-18 09:59 pm, Mark Filipak wrote:
On 18/02/2024 05.09, Gyan Doshi wrote:
Add -mpegts_flags +initial_discontinuity to get rid of the corrupt
packet messages. This may or may not get rid of the glitches.
Regards,
Gyan
Hey, Gyan,
No effect whatsoever. Same message, same
\,504204963)' -bsf:s
noise=drop='lt(pts\,2854113)+gt(pts\,504204963)' %CODE% -muxdelay 0
"%TARGET%"
I get "Packet corrupt (stream = 0, dts = 504201210)" and there's a
glitch during play.
Add -mpegts_flags +initial_discontinuity to get rid of the corrupt
packet messages. T
o drop packets.
Like the noise bsf. But it does not compute or look at payload CRC.
https://ffmpeg.org//ffmpeg-bitstream-filters.html#noise
Regards,
Gyan
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(e.g. a video option with no video streams) or that it
The doc link is for the standalone encoder program supplied with the
library, not for use with ffmpeg.
For ffmpeg, you should add
-svtav1-params rc=1
Regards,
Gyan
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On 2023-11-11 08:03 pm, Andrew Randrianasulu wrote:
For announcement writer(s) - can you please at least list API changes with
pointer to documentation section?
See doc/APIchanges
Regards,
Gyan
As someone who tries to co-maintain software (cinelerra-gg) relying on
ffmpeg AND other
evc_metadata` can only be applied to video streams with codec hevc, so ffmpeg
tries to apply the bsf to audio stream, the bsf complains.
Instead, use `-bsf:v` to apply it only to video streams.
Regards,
Gyan
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of a video?
Just found the solution myself:
ffplay -vf select='eq(n,0)' -x 500 -an %1
This will decode and evaluate all frames.
Go with
ffplay -vf trim=end_frame=1,tpad=stop=-1:stop_mode=clone -x 500 -an %1
Regards,
Gyan
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s expected.
Regards,
Gyan
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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 schrieb Gyan Doshi:
On 2023-02-20 06:27 pm
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 schrieb Gyan Doshi:
On 2023-02-20 06:03 pm
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 the ddagrab filter with the example from
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, but that can't be the problem.
ffmpeg -f lavfi -i
?
[h264_nvenc @ 01f5f7bbf980] OpenEncodeSessionEx failed: no encode
device (1): (no details)
Works here. Could be a driver issue - try reverting.
Regards,
Gyan
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olon after fill, not =
drawbox=color=black:t=fill:enable='between(t,1.0,2.0)'
Regards,
Gyan
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ffmpeg
is printed when ffmpeg receives a 'd' key press and then
some non-numeral presses.
Check if adding -nostdin suppresses the behaviour.
Regards,
Gyan
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To u
=horizontal output
Regards,
Gyan
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On 2022-06-16 01:17 pm, Michael Koch wrote:
Am 16.06.2022 um 09:33 schrieb Gyan Doshi:
On 2022-06-16 12:45 pm, Michael Koch wrote:
I would like to understand why in some cases -loop 1 is required
before the input files, and in some cases it can be omitted.
-loop option is specific
length.
You would apply loop when you need to keep alive an image sequence input
at a timestamp beyond its natural length, usually a fade.
With the tpad or loop filters, this can be done inside a filtergraph
instead of at the demuxer level.
Regards,
Gyan
,
Gyan
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-noborder -x 2048 -y 2048 -left 1920 -top 0 4096.png
But then we don't have the full 4K resolution.
Who has an idea what's wrong here?
The console output is below.
What's the size value in Settings -> Display under Scale and Layout?
Regards,
G
for macOS-arm64
You'll need the lib built for x86-64.
Regards,
Gyan
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On 2022-02-28 12:28 pm, Gyan Doshi wrote:
On 2022-02-28 10:37 am, Steven Kan wrote:
I am overlaying real-time weather on streaming video:
https://www.youtube.com/channel/UCIVY11504PcY2sy2qpRhiMg/live
I have a script reading from openweather.org every 10 minutes and
writing to weather.txt
efore. I'll patch it to make it an interval.
Regards,
Gyan
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. The command below was working in 4.4
Use -g 1 in place of -intra
Gyan
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this would happen.
I'm afraid thet is it a bug of macOS...
I attached config.log with this message. Hope someone help me...
Make sure libvmaf.h is current and exists in only one path (no older
copies elsewhere).
Gyan
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On 2022-01-30 07:25 pm, Michael Koch wrote:
Am 30.01.2022 um 14:29 schrieb Gyan Doshi:
On 2022-01-30 06:36 pm, Michael Koch wrote:
The problem is that FFmpeg seems to read the link only one time.
When I change the link target (while FFmpeg is running) with the
copy command, the link
FFmpeg, then it shows the new image.
Add -readrate 1 before the input.
Regards,
Gyan
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is open in FFmpeg.
Use -stream_loop -1 instead of loop. Update the image atomically i.e.
not during a read window.. Best way to update is to create a symlink and
use that as input. Repoint the symlink when the new image file is ready.
Regards,
Gyan
On 2022-01-19 05:29 pm, Bo Berglund wrote:
On Wed, 19 Jan 2022 17:10:26 +0530, Gyan Doshi wrote:
What do I need to just get that output I want?
The closest you can get is
ffprobe -v 0 -of compact=p=0:nk=1 -sexagesimal -show_entries
format=duration INPUT
Thanks, this returns
but by some mysterious reason a
lot more clobbers the output.
What do I need to just get that output I want?
The closest you can get is
ffprobe -v 0 -of compact=p=0:nk=1 -sexagesimal -show_entries
format=duration INPUT
Regards,
Gyan
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it.
I added an option -recast_ media to ffmpeg in 79ebdbb9b9
With this, the user can manually assign a decoder and process the
packets in such a stream.
e.g.
ffmpeg -recast_media -c:0 mjpeg -iudp://[ff01:1::1]:5004 -map 0:v ...
Regards,
Gyan
for a few raw frame capture device demuxers, and
meant to signal the dimensions in formats without metadata.
It's not meant for ffplay playback window size. Those are -x and -y
Regards,
Gyan
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https:
) decoder. I tried to include it using “cc_dec”, “eia_608”
and both, and none of them add the decoder.
It's ccaption. The name value is for logging purposes.
Run
./configure --list-decoders
to get a list of all recognized strings
Regards,
Gyan
-crf 23 \
-preset veryfast \
output.mkv
This creates a seemingly correct file, with one little problem: the
time starts at 00:00:27 and ends at 00:18:26. (As displayed by the
player mpv.)
This should work. Where are the keyframes in the video stream?
Reg
it predictably) ?
The general option is -bitexact.
This doesn't apply to your usage but note that there are some encoders
which aren't deterministic, so some variance can be seen.
Regards,
Gyan
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On 2021-11-09 04:31 pm, Nicolas George wrote:
Gyan Doshi (12021-11-09):
Not on FAT32. And since it's not guaranteed, the filter should accommodate
that.
What are you talking about? The filter does not write the file, it just
reads it. It is the responsibility of whoever writes the file
On 2021-11-09 03:15 am, Marton Balint wrote:
On Mon, 8 Nov 2021, Gyan Doshi wrote:
On 2021-11-07 02:56 pm, Marton Balint wrote:
On Sun, 7 Nov 2021, Gyan Doshi wrote:
This can work until it doesn't. The filter doesn't tolerate any load
failures.
I'll see if I can add a short
On 2021-11-07 02:56 pm, Marton Balint wrote:
On Sun, 7 Nov 2021, Gyan Doshi wrote:
On 2021-11-07 03:58 am, Anatoly wrote:
On Thu, 4 Nov 2021 20:14:16 +0800
LianCheng wrote:
Yes, would like to know in ffmpeg, under drawtext, the textfile
(reload=1) is using read-write or read-only
On 2021-11-07 12:06 pm, LianCheng Tan wrote:
Hi Gyan,
Will it be added in the next release of ffmpeg?
No guarantees but I'll aim for that.
Regards,
Gyan
On 7 Nov 2021, at 1:08 PM, Gyan Doshi wrote:
On 2021-11-07 03:58 am, Anatoly wrote:
On Thu, 4 Nov 2021 20:14:16 +0800
. The filter doesn't tolerate any load
failures.
I'll see if I can add a short sleep and retry. If it still fails, we
continue with the old text.
Regards,
Gyan
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ginal rate.
Regards,
Gyan
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is for.
It is for some opaque reason that the muxer defaults to CFR, possibly to
do with some limitation or bug in the early days.
Regards,
Gyan
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n works fine for jpg images. How can an animated gif be
looped?
GIF has a dedicated demuxer. See ffmpeg -h demuxer=gif
There's a boolean option called -ignore loop. You can also apply
-stream_loop.
Regards,
Gyan
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ff
g:
c drawtext -1 reinit fontcolor=red
the retun is:
Command reply for stream 0: ret:0 res:
and the text turns red
what am i missing?
As the docs state, the acceptable commands are w, h, x, ,y
so the syntax is
c crop -1 w 100
Regards,
Gyan
__
'm not sure
it's applicable.
For image sequence inputs, use the framerate option.
ffmpeg -framerate 30 -i ...
Regards,
Gyan
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/copied to
output.mp4 quite fast. After that it starts reading second.mp4 and works a
very long time on it, probably close to one minute.
Which player?
Try
ffmpeg -i first.mp4 -i second.mp4 -filter_complex
xfade=transition=fade:duration=2:offset=5 -pix_fmt yuv420p output.mp4
Regards,
Gyan
low
on my list.
Regards,
Gyan
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capture doesn't start.
If it's 1000.53s, then modulus is 30ms, which is less than 40ms so
capture is initiated.
Regards,
Gyan
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to the script above and achieve
different gop sizes for different streams?
-x264-params :v:0 "keyint=24:keyint_min=24:bframes=1" and
-x264-params:v:1 "keyint=72:keyint_min=72:bframes=3"
Regards,
Gyan
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yntax:
hh:mm:ss[:;.]ff
Is there a way to do this?
Not possible. Let me see if it's possible to get it from frame metadata.
How are you capturing?
Gyan
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-noautoscale (which you reviewed), but
it's not supported by (almost) any encoder.
However, the crop result can be consumed before buffersink, e.g. as an
overlay. I've done this many times.
Regards,
Gyan
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the output.
You may be thinking of the interleave filter. select uses exactly one input.
On this topic generally, see https://superuser.com/q/1632998/
Regards,
Gyan
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On 2021-04-21 00:50, Mohammed Bey Ahmed Khernache wrote:
Hello,
would you tell me whether it is possible to log the number of cycles needed
to decode every single frame using ffmpeg ?
The closest you can get is by adding `-benchmark_all`. The timings are
in microseconds.
Regards,
Gyan
On 2021-04-20 22:39, Bryce Newman wrote:
Hi Gyan,
Thank you!
Can this patch be included in future stable versions of ffprobe?
All features added to the master branch will make it to a future release.
Gyan
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of those fields out as metadata, but I
expect that to take some time as many regression unit tests will have to
be changed.
Regards,
Gyan
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the last example at http://www.ffmpeg.org/ffmpeg-formats.html#Options-7
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Gyan
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in the documentation. The option is called
"inputs".
Indeed.
Fixed.
Gyan
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to differ. Same here, since the timekeeping resolution is much
lower, the output (nominal) timestamps shift a bit, affecting the fps as
well.
Regards,
Gyan
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ul:
https://video.stackexchange.com/q/20495/
The binaries are 64-bit as mentioned on the first line of the README.
Regards,
Gyan
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timestamps. Nothing to do with
ffmpeg.
Regards,
Gyan
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usually set it to 1/100.
Regards,
Gyan
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different than the source?
Gyan
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. No addiitional frames should be added.
Regards,
Gyan
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the -progress option
to a single muxer output.
-progress is global, not per-output, so it is set as usual.
Regards,
Gyan
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re identical.
Regards,
Gyan
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N/A speed=
150x
video:471kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
[Parsed_psnr_4 @ 0x55e31edfa580] PSNR y:inf u:inf v:inf average:inf min:inf
max:inf
PSNR is calculated and printed on the last line above.
to those
offsets. This is inefficient in terms of space packing but any NLE can
open these files and access the new data as it gets added.
Regards,
Gyan
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On 09-01-2021 08:06 am, Bernhard Döbler wrote:
Am 08.01.2021 um 05:18 schrieb Gyan Doshi:
On 08-01-2021 06:37, Bernhard Döbler wrote:
I have video files. I want to extract the audio and use one single
frame from the video track as cover image.
The command line looks like this
ffmpeg.exe
he audio file to be as long as the video.
`-frames` is set to terminate the output when fulfilled. Use trim within
the filtergraph.
ffmpeg.exe -y -i "e:\01. Video.mp4" -filter:v
"select=between(145\,prev_pts*TB\,pts*TB),trim=end_frame=1" -c:a copy
-c
/commit/5b48d2af43
+1 represents the number of out-of-tree commits applied on top.
Regards,
Gyan
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On 25-12-2020 10:05 am, Mark Filipak (ffmpeg) wrote:
Never mind. I figured it out based on the sizes of the 'exe' files.
I downloaded 'ffmpeg-N-100461-gb0a882cc93-win64-gpl-vulkan.zip'.
On 12/24/2020 06:23 AM, Gyan Doshi wrote:
On 24-12-2020 02:33 pm, Mark Filipak (ffmpeg) wrote
ared are statically
linked and have everything in the exe.
vulkan is a new-ish API for processing on a GPU. You can use the few
vulkan filters currently in libavfilter. Your graphics driver must
support Vulkan else ffmpeg won't run. Yours should.
Regards,
Windows binaries.
Regards,
Gyan
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my pictures to be displayed without
distortion ?
The zoompan filter automatically rescales its input to 1280x720.
Override it by adding `s=5152x3864` as an option to the zoompan filter.
Remove the `-s` option from the command.
Regards,
G
. 8.100
libpostproc55. 8.100 / 55. 8.100
Failed to set value 'h264_metadata=crop_top=128' for option 'bsf:v': Option not
found
Very grateful to anyone who can point out where I am going wrong here, it
looks simple enough.
You're invoking ff
2^31-1 as it says above. Yours is
close to 20 times that value.
Simply change it to
-start_number 10891900 401%08d.pgm
This will work, assuming you don't have around 90 million images to write.
Regards,
Gyan
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ffmpe
et at trac.
Gyan
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rch for "blackdetect" in the documentation
See https://video.stackexchange.com/q/23589/ for a starting point.
Gyan
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ffmpeg has a native wavpack encoder.
Gyan
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n for a output stream refers to the output
file index. Since you're sending streams to the same output file, they
will have the same output file index
If you want to record for posterity which file a stream originated
from, add metadata tags per stream e.g.
-metadata:s
On 14-09-2020 04:54 pm, Gyan Doshi wrote:
On 14-09-2020 03:41 pm, Michael Koch wrote:
Am 14.09.2020 um 11:26 schrieb Gyan Doshi:
On 14-09-2020 02:47 pm, Michael Koch wrote:
ffmpeg -v verbose -f lavfi -i
testsrc2=s=svga:d=5,format=yuv422p10le -vf
format=rgb48le,lut3d="VLog_to_V709
On 14-09-2020 03:41 pm, Michael Koch wrote:
Am 14.09.2020 um 11:26 schrieb Gyan Doshi:
On 14-09-2020 02:47 pm, Michael Koch wrote:
ffmpeg -v verbose -f lavfi -i testsrc2=s=svga:d=5,format=yuv422p10le
-vf format=rgb48le,lut3d="VLog_to_V709.cube",format=y
filter is redundant with -pix_fmt, so I removed one of
them.
Gyan
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See https://superuser.com/q/1281327/
Gyan
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On 04-09-2020 02:19 am, Mark Filipak wrote:
On 09/03/2020 01:42 AM, Gyan Doshi wrote:
On 02-09-2020 11:53 pm, Michael Koch wrote:
"ffmpeg.zeranoe.com will close on Sep 18, 2020, and all builds will
be removed."
Any idea where we can get builds for Windows after this date
nce I make arrangements.
Gyan
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ing
dump_extra for muxers such as mpegts.
Regards,
Gyan
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apped
twice, thus creating two output streams. Then different output options
are set for each of those output streams.
Gyan
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are auto-generated based on other
doc sources, so there's no need to maintain separate docs.
Yes, there's only one source repository for the documentation text, and
the format is texinfo.
Gyan
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ht
On 21-08-2020 11:27 pm, Mark Filipak wrote:
On 08/21/2020 12:34 PM, Michael Koch wrote:
Am 21.08.2020 um 17:06 schrieb Gyan Doshi:
On 21-08-2020 07:30 pm, Michael Koch wrote:
Am 21.08.2020 um 15:42 schrieb Mark Filipak:
On 08/21/2020 06:44 AM, Gyan Doshi wrote:
On 21-08-2020 04:03 pm
On 21-08-2020 07:12 pm, Mark Filipak wrote:
On 08/21/2020 06:44 AM, Gyan Doshi wrote:
On 21-08-2020 04:03 pm, Michael Koch wrote:
Am 21.08.2020 um 12:09 schrieb Gyan Doshi:
On 21-08-2020 02:36 pm, Michael Koch wrote:
Am 21.08.2020 um 10:50 schrieb Paul B Mahol:
On 8/21/20, Michael
On 21-08-2020 07:30 pm, Michael Koch wrote:
Am 21.08.2020 um 15:42 schrieb Mark Filipak:
On 08/21/2020 06:44 AM, Gyan Doshi wrote:
On 21-08-2020 04:03 pm, Michael Koch wrote:
Am 21.08.2020 um 12:09 schrieb Gyan Doshi:
On 21-08-2020 02:36 pm, Michael Koch wrote:
Am 21.08.2020 um 10:50
On 21-08-2020 04:03 pm, Michael Koch wrote:
Am 21.08.2020 um 12:09 schrieb Gyan Doshi:
On 21-08-2020 02:36 pm, Michael Koch wrote:
Am 21.08.2020 um 10:50 schrieb Paul B Mahol:
On 8/21/20, Michael Koch wrote:
Please add this to the documentation (for example in chapter 20.9
image2
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