Am 21.08.24 um 14:39 schrieb Ulf Zibis:
and I'm not aware of any program that overrides it
I've seen this plenty of times. The one, which instantly comes in memory is
IrfanView. There it's my standard setting. From there I was inspired for my
proposal. I also remember some
Am 21.08.24 um 14:39 schrieb Ulf Zibis:
Second, implementing the proposed option correctly is actually very
non-trivial, especially considering that there can be multiple input
files and multiple output files, and there needs to be some syntax
and built-in logic for mapping mtime from input
Am 21.08.24 um 12:45 schrieb Oliver Fromme:
I'm sorry this mail is going to be rather long. However, I would
like to explain my opinion on this matter in detail.
Hollala, thanks for your effort. German accuracy? ;-)
Well, I'm not sure who brought up the "OS call" argument -- and why.
I thi
Am 21.08.24 um 10:56 schrieb Reindl Harald:
Am 20.08.24 um 21:33 schrieb Ulf Zibis:
There seems some need to outline and precise my original message.
1. For the security of existing data and in some way for convenience (avoid the
need to create the potentially overwritten data again) FFmpeg
Am 20.08.24 um 21:59 schrieb Rob Hallam:
It is unlikely at this point you will receive an argument you deem applicable.
A call to an OS function is not the same as managing filesystem-level metadata.
If you really want it, it is possible for you to write and maintain
your own small patch that
Am 14.08.24 um 17:20 schrieb Ulf Zibis:
Am 12.08.24 um 19:04 schrieb Mark Filipak:
That's a question for your operating system. I can change file times to
whatever I want via the TotalCommander file browser. There are probably others.
Isn't removing existing output files samely
Am 18.08.24 um 11:38 schrieb Reindl Harald:
Am 18.08.24 um 00:54 schrieb Ulf Zibis:
Am 18.08.24 um 00:26 schrieb Reindl Harald:
Am 17.08.24 um 22:33 schrieb Ulf Zibis:
And WHAT then happens with the original file, when write creates ANOTHER file
???
NOTHING'
Another intere
Am 18.08.24 um 03:04 schrieb Oliver Fromme:
Would you please stop this? This kind of discussion is not going to
improve FFmpeg. You're just annoying everybody.
You mean the discussion about smartness, dumbness and nonsense? I agree with
you.
Please address the originator.
Cheers Ulf
Am 18.08.24 um 00:26 schrieb Reindl Harald:
Am 17.08.24 um 22:33 schrieb Ulf Zibis:
Am 17.08.24 um 22:10 schrieb Bouke / Videotoolshed:
..., it will be ‘another’ file with the same name.
And WHAT then happens with the original file, when write creates ANOTHER file
???
NOTHING
Another
Am 18.08.24 um 00:30 schrieb Reindl Harald:
Am 17.08.24 um 23:07 schrieb Ulf Zibis:
Am 17.08.24 um 22:10 schrieb Bouke / Videotoolshed:
The user input is parsed as ‘if file exists and not -y in line, abort’
FFmpeg CLI does not abort in that case, it outputs a question to system out
Am 18.08.24 um 00:26 schrieb Reindl Harald:
Am 17.08.24 um 21:53 schrieb Ulf Zibis:
but there is no delete action
You can spin it however you like. The logic around the ‘-y’ option requires an
extra additional OS call, in this case querying the existence of the file,
before it is
Am 17.08.24 um 22:10 schrieb Bouke / Videotoolshed:
The user input is parsed as ‘if file exists and not -y in line, abort’
FFmpeg CLI does not abort in that case, it outputs a question to system out
stream, and then reads the input from system in stream. These are again 2
additional OS calls
Am 17.08.24 um 22:10 schrieb Bouke / Videotoolshed:
..., it will be ‘another’ file with the same name.
And WHAT then happens with the original file, when write creates ANOTHER file
???
The user input is parsed as ‘if file exists and not -y in line, abort’
Yes, and so we have 3 OS calls extra
Am 16.08.24 um 11:46 schrieb Reindl Harald:
but you are not very smart
That's not a problem for me. It's enough for me to be smarter than you.
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To un
Am 16.08.24 um 11:43 schrieb Reindl Harald:
Am 15.08.24 um 23:53 schrieb Ulf Zibis:
Am 15.08.24 um 23:39 schrieb Greg Oliver:
On Thu, Aug 15, 2024 at 12:02 PM Nicolas George wrote:
Ulf Zibis (12024-08-14):
But for convenience FFmpeg CLI provides option `-y` for this task
No, it does
Am 15.08.24 um 23:39 schrieb Greg Oliver:
On Thu, Aug 15, 2024 at 12:02 PM Nicolas George wrote:
Ulf Zibis (12024-08-14):
But for convenience FFmpeg CLI provides option `-y` for this task
No, it does not. The -y option only disables a very simple, unreliable
but convenient safety measure
Am 14.08.24 um 21:13 schrieb Greg Oliver:
In other words if the conversion command failed and you had it set to
delete to input file after conversion, with ; it will delete the file
even if the new file was not created, ...
Here it is not about deleting the *input* file, it's about deleting t
Am 12.08.24 um 19:04 schrieb Mark Filipak:
That's a question for your operating system. I can change file times to
whatever I want via the TotalCommander file browser. There are probably others.
Isn't removing existing output files samely a question for the OS ?
But for convenience FFmpeg
Am 12.08.24 um 23:05 schrieb Greg Oliver:
On Mon, Aug 12, 2024 at 6:06 AM Ulf Zibis via ffmpeg-user <
ffmpeg-user@ffmpeg.org> wrote:
Hi,
is there an option how to preserve the file time from the input file to
the outputfile?
My search for "file time" on https://ffmpeg.org/ffm
Am 12.08.24 um 19:37 schrieb Gia Ferrari:
On 8/12/24 3:57 AM, Ulf Zibis via ffmpeg-user wrote:
Hi,
is there an option how to preserve the file time from the input file to the outputfile?
My search for "file time" on https://ffmpeg.org/ffmpeg-all.html was
resultless.
Hi,
is there an option how to preserve the file time from the input file to the
outputfile?
My search for "file time" on https://ffmpeg.org/ffmpeg-all.html was resultless.
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/ma
Am 29.10.23 um 22:06 schrieb Torsten Kaiser:
On 29.10.23 20:28, Ulf Zibis wrote:
Hi,
when I use
ffprobe -show_frames INPUT
I get all frames.
But I only want some frames e.g. the first 10 or frame 100 to 109.
ffprobe doesn't seem to provide anything like -ss -t or -frames. So I assu
Hi,
when I use
ffprobe -show_frames INPUT
I get all frames.
But I only want some frames e.g. the first 10 or frame 100 to 109.
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscribe, vi
Am 29.10.23 um 18:53 schrieb Paul B Mahol:
On Sun, Oct 29, 2023 at 6:08 PM Ulf Zibis wrote:
Am 29.10.23 um 17:04 schrieb Paul B Mahol:
https://ffmpeg.org/ffmpeg-filters.html#toc-vfrdet
At end it will output number of frames detected as having variable delta
pts, and ones with constant
Am 29.10.23 um 17:04 schrieb Paul B Mahol:
On Sun, Oct 29, 2023 at 4:52 PM Ulf Zibis wrote:
Am 29.10.23 um 16:00 schrieb Paul B Mahol:
On Sun, Oct 29, 2023 at 3:29 PM Ulf Zibis wrote:
Hi,
so 18.3 % of the frames were dropped and duplicated at same time.
Does that mean, that 8063 frames
Am 29.10.23 um 16:00 schrieb Paul B Mahol:
On Sun, Oct 29, 2023 at 3:29 PM Ulf Zibis wrote:
Hi,
so 18.3 % of the frames were dropped and duplicated at same time.
Does that mean, that 8063 frames of the input were dropped and then same
(or other) 8064 frames were duplicated to the output
Hi,
so 18.3 % of the frames were dropped and duplicated at same time.
Does that mean, that 8063 frames of the input were dropped and then same (or
other) 8064 frames were duplicated to the output?
What is the sense of this?
Maybe the original didn't have the exact framerate of 25 fps ?
Would
Am 25.10.23 um 06:50 schrieb Classic SSG Enjoyer:
Use Opus. Opus delievers better audio quality than AAC/Vorbis
On Tue, 24 Oct, 2023, 11:01 pm Ferdi Scholten, wrote:
Hi,
Vorbis audio is officially not supported by the mp4 container
specifications.
Matroska does not have this problem as it
Am 24.10.23 um 08:12 schrieb Ferdi Scholten:
Hi,
Vorbis audio is officially not supported by the mp4 container specifications.
Matroska does not have this problem as it supports almost all known codecs.
These are the audio codecs that are in the mp4 specifications: AAC, ALS, SLS,
MP3, MP2, MP
Hi,
I have a Matroska video with libx264 video and libvorbis audio. when I copy it to MP4
container, the resulting video does not play audio on Android 8 phone ->
"Audio-Codec not supported"
Matroska: http://jugkoeln.de/Projects/ffmpeg/K%C3%B6nig_de_3.mkv
MP4: http://jugkoeln.de/Projects/ffmp
Am 20.10.23 um 23:37 schrieb Greg Oliver:
On Fri, Oct 20, 2023 at 3:57 PM Ulf Zibis wrote:
On Fri, Oct 20, 2023 at 7:19 PM Ulf Zibis wrote:
Hi,
in my last post "Codec 0x21000 is not in the full list."
you can see, that also the included metadata is mostly missing in the
output
Am 20.10.23 um 20:14 schrieb Paul B Mahol:
On Fri, Oct 20, 2023 at 7:19 PM Ulf Zibis wrote:
Hi,
in my last post "Codec 0x21000 is not in the full list."
you can see, that also the included metadata is mostly missing in the
output of ffprobe. Why?
When I use the same command an
Hi,
in my last post "Codec 0x21000 is not in the full list."
you can see, that also the included metadata is mostly missing in the output of
ffprobe. Why?
When I use the same command and the same metadata file for mkv output, beside
this message all is fine:
$ ffmpeg -i König_de.meta -t 3:0
Hi,
above message is 2 times in the output (in yellow). What does that mean?
Also there is in yellow:
[mp4 @ 0x55a76f8cf3c0] track 1: codec frame size is not set
[mp4 @ 0x55a76f8cf3c0] track 2: codec frame size is not set
In the following ffprobe output, there is an additional subtitle stream w
Am 18.10.23 um 22:45 schrieb Leo Butler via ffmpeg-user:
The answer is not specific to any particular container.
The easiest way, in my opinion, is to write an ffmetadata file with
the information.
The syntax is described here:
https://ffmpeg.org/ffmpeg-all.html#Metadata
The example at the b
Am 16.10.23 um 01:12 schrieb Ulf Zibis:
Hi,
is there a tutorial on how to add additional audio streams to mkv file?
Now I found a solution with "-map". It's more simple as I thought:
ffmpeg -i INPUT_de.mkv -i INPUT_en.mkv -map 0 -map 1:a -c copy -metadata:s:a:0
language=de
Am 16.10.23 um 13:50 schrieb Cecil Westerhof via ffmpeg-user:
I have started with creating YouTube videos. A lot to learn. I want to
use ffmpeg to help me and it does. :-D
But there are a lot of things I do not know at the moment.
For example: if I have a video where I want to change for a shor
Am 12.10.23 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 to
Am 16.10.23 um 08:28 schrieb Reindl Harald:
so the input was always the same - jesus christ
So ok, you didn't see this because of the exhaustive cutting and concatenation, which was
identical in all 3 cases.. My guess was, that this maybe irritates the correct processing
of the codec. I.e.
Hi,
is there a tutorial on how to add title and chapters to mkv file?
I didn't find any information in ffmpeg documentation and wiki.
Thanks,
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
Hi,
is there a tutorial on how to add additional audio streams to mkv file?
I didn't find any information in ffmpeg documentation and wiki.
Thanks,
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-u
Am 15.10.23 um 17:51 schrieb Reindl Harald:
Am 15.10.23 um 17:20 schrieb Ulf Zibis:
With "veryfast" I stated to "not care about *space*", but with "-crf 23" I always stated
"care about same quality".
you statet "i don't care about
Am 15.10.23 um 16:52 schrieb Reindl Harald:
Am 15.10.23 um 16:43 schrieb Ulf Zibis:
Am 15.10.23 um 15:43 schrieb Reindl Harald:
if you prefer fast you don't care about quality
in doubt quality needs space and find a compromise between size and space - you
can't have both
Am 15.10.23 um 15:43 schrieb Reindl Harald:
Am 15.10.23 um 15:12 schrieb Ulf Zibis:
by accident I transcoded a video with -preset veryfast (it took 1 h).
So I had to run it again with -preset veryslow (it took 12 h).
Now I'm wondering about the file sizes. How can that be?
why not
Hi,
by accident I transcoded a video with -preset veryfast (it took 1 h).
So I had to run it again with -preset veryslow (it took 12 h).
Now I'm wondering about the file sizes. How can that be?
$ ls -l König_it*
-rwxrwxrwx 1 ich ich 1058092584 Okt 13 02:16 König_it_veryfast.mkv
-rwxrwxrwx 1 ich
Am 11.10.23 um 10:38 schrieb Adrian Szatmari:
So I took a video and cut it two ways, one with reencoding and one
without reencoding, call them R and C (cut). Im trying to do
concatenation without reencoding, and I'm able to concat the video in
all orders , , , , but the sound disappears
for an
Am 13.10.23 um 01:49 schrieb Ulf Zibis:
Hi,
I have concatenated 2 mkv videos, both with video and audio stream. In the
resulting mkv video in the 2n part, there is no audio anymore.
I now have found out the reason.
The first video had an aac audio stream and the 2nd a libvorbis audio
Hi,
I have concatenated 2 mkv videos, both with video and audio stream. In the
resulting mkv video in the 2n part, there is no audio anymore.
What can I do, to have audio also in the 2nd part.
$ ffmpeg -f concat -safe 0 -i <(echo "file '$PWD/König_de.mkv'" && echo "file
'$PWD/König_de_Abspann
Hi,
what is the difference between i-frames and key frames?
And how many other frames are between i-frames or key frames in mp4 files,
created with ffmpeg and with default settings?
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ff
Am 01.10.23 um 12:02 schrieb Ulf Zibis:
Hi,
I guess it stands for "-color_range limited", but even that I don't understand
what it means.
Where does the calculation "MPEG (219*2^(n-8))" come from?
My question is because of this suggestion:
https://trac.ffmpeg
Hi,
I have experienced ~11 % dropped frames while screen grabbing, see below.
When I used simplescreenrecorder [1], which also uses FFmpeg libraries under the hood, I
had less than 1 % frame drops with the parameters
"vcodec=libx264rgb,crf=0,preset=ultrafast" and the same dimensions.
[1] https
Am 01.10.23 um 23:25 schrieb Ferdi Scholten:
On 01-10-2023 19:28, Ulf Zibis wrote:
Hi,
I have a video, grabbed from screen with "-c:v libx264rgb -crf 0 -preset
ultrafast".
When I re-encode a small scene out of it, it counts 576 frames. (Same number of
images, when I extract
Hi,
I have a video, grabbed from screen with "-c:v libx264rgb -crf 0 -preset
ultrafast".
When I re-encode a small scene out of it, it counts 576 frames. (Same number of
images, when I extract all frames as JPEG.)
But when I just do a stream copy, I get 761 frames, even when I use "-fps_mode:v
Am 01.10.23 um 18:04 schrieb Carl Zwanzig:
On 10/1/2023 8:41 AM, Ulf Zibis wrote:
So here it compresses with factor ~11, wow, great performance for ultrafast.
Depends a lot on the content, of course. One of the great things,
compression-wise, with screen grabs is that there is usually very
Am 01.10.23 um 16:37 schrieb Paul B Mahol:
On 10/1/23, Ulf Zibis wrote:
Hi,
I used the following command on a 155 minute grabbing:
ffmpeg -video_size 1680x888 -framerate 25 -f x11grab -i :0.0+0,81 -c:v
libx264rgb -crf 0 -preset ultrafast output.mkv
Assuming, the RGB range is 8 + 8 + 8 bit
Hi,
I used the following command on a 155 minute grabbing:
ffmpeg -video_size 1680x888 -framerate 25 -f x11grab -i :0.0+0,81 -c:v
libx264rgb -crf 0 -preset ultrafast output.mkv
Assuming, the RGB range is 8 + 8 + 8 bit or 3 byte, I calculate:
3 x 25 x 60 x 155 x 1680 x 888 = 1040.6 GByte
But
Am 01.10.23 um 14:05 schrieb Paul B Mahol:
On 10/1/23, Ulf Zibis wrote:
And how can I know, in which version of FFMPEG this patch was released?
https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=7ca71b79f2b3256a0eef1a099b857ac9e4017e36
By searching for that commit log in git log of
Am 01.10.23 um 12:02 schrieb Ulf Zibis:
Hi,
I guess it stands for "-color_range limited", but even that I don't understand
what it means.
Where does the calculation "MPEG (219*2^(n-8))" come from?
And how can I know, in which version of FFMPEG this p
Hi,
I guess it stands for "-color_range limited", but even that I don't understand
what it means.
Where does the calculation "MPEG (219*2^(n-8))" come from?
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/
Am 04.09.23 um 14:59 schrieb Reindl Harald:
Am 04.09.23 um 14:35 schrieb Ulf Zibis:
because of a domain relocation, my email was not reachable from 2023-09-01
13:54 UTC to 2023-09-04 11:38 UTC.
because it takes time?
the interval of retries increases as it makes no sense trying every 5
Am 04.09.23 um 14:43 schrieb Reindl Harald:
Am 04.09.23 um 14:35 schrieb Ulf Zibis:
because of a domain relocation, my email was not reachable from 2023-09-01
13:54 UTC to 2023-09-04 11:38 UTC.
Is it possible to resend the missing messages for ffmpeg-user@ffmpeg.org and
ffmpeg-de
Hi,
because of a domain relocation, my email was not reachable from 2023-09-01
13:54 UTC to 2023-09-04 11:38 UTC.
Is it possible to resend the missing messages for ffmpeg-user@ffmpeg.org and
ffmpeg-de...@ffmpeg.org?
-Ulf
___
ffmpeg-user mailing lis
Hi,
With this command I tried to enhance a short video:
ffmpeg -i NET\ Villa\ Burgen.mp4 -vf atadenoise,histeq=0.1:0.11:strong -c:a
copy -movflags +faststart NET\ Villa\ Burgen_3.mp4
(using ffmpeg version 5.1.2-0ubuntu1~22.04.sav1.1)
It helps a lot for the first 2 minutes, but from there in the
Am 12.11.22 um 17:09 schrieb Carl Zwanzig:
On 11/12/2022 8:02 AM, Ulf Zibis wrote:
Thanks for your detailed comparison. bwdif and estdif make it. Even they double
the frame rate, compression factor now is 10 instead 8 and the visual result is
brillant.
For the list archive, would you
Am 12.11.22 um 14:41 schrieb Carl Eugen Hoyos:
https://ffmpeg.org/ffmpeg-filters.html offers a few options:
kerndeint is old / outdated, should be fast
yadif was for a long time the most useful deinterlacer
w3fdif is a BBC-sponsored development
bwdif claims to combine yadif and w3fdif into some
Am 12.11.22 um 10:57 schrieb Bouke / Videotoolshed:
Hi Ulf,
This is normal DV interlaced video. Open the .avi with VLC and turn OFF
de-interlace, you’ll see how gorgeous the motion was on an old fashioned
interlace aware screen.
So, you need to de-interlace the filter.
While you’re at it, yo
Hi,
I have transcoded a avi video to mp4 for compressing by factor 8. Now I see
interlace artifacts. E.g. the eagle in the back window of the bus or the fence
in the background.
Additionally I would like to reduce the noise for even better compression. Any
hint for a good filter?
Refer:
http:
Am 05.07.22 um 23:55 schrieb Carl Zwanzig:
For dealing with minor size changes, an option is a filter chain to crop larger
frames to the target size then center/overlay the result on a target-sized
black background.
As alternative to cropping, you can use the "fillborders" filter.
- Ulf
__
Am 28.06.22 um 17:01 schrieb Gyan Doshi:
That's a H.264 bitstream filter. It can only be used on H.264 video streams.
This is the case here.
Basic syntax is
ffmpeg -i input -c copy -bsf:v
h264_metadata=display_orientation=insert:flip=horizontal output
Much thanks for this syntax.
Un
Am 28.06.22 um 15:14 schrieb Ulf Zibis:
Am 28.06.22 um 14:59 schrieb Moritz Barsnick:
Metadata flags do exist for rotating, but not for flipping. Thus this
cannot be done without re-encoding.
I'm irritated. Here I can read, that it exists:
https://ffmpeg.org/ffmpeg-all
Am 28.06.22 um 14:59 schrieb Moritz Barsnick:
Metadata flags do exist for rotating, but not for flipping. Thus this
cannot be done without re-encoding.
I'm irritated. Here I can read, that it exists:
https://ffmpeg.org/ffmpeg-all.html#toc-h264_005fmetadata
Even for rotation, the player needs
Am 28.06.22 um 13:45 schrieb Ulf Zibis:
Hi,
how can I correct a vertically flipped mp4 video without re-encoding? The left
side is on the right side and vice versa.
I tried:
ffmpeg -i input.mp4 -c copy -metadata:s:v:0 flip=horizontal output.mp4
But this changed nothing :-(
$ ffprobe
Hi,
how can I correct a vertically flipped mp4 video without re-encoding? The left
side is on the right side and vice versa.
Thanks,
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user
To unsubscr
Hi,
I have learned, that ffmpeg respects a given tbr value as output frame rate.
Now I'm questioning the advantage of that behaviour. Can someone tell me?
I only see disadvantages:
- the video becomes encoded with lower quality, i.g. q=33.0 instead q=29.0
- the video size is 13 % bigger, e.g. 5
Am 24.08.21 um 13:51 schrieb Ulf Zibis
I guess you could use the -r option to override this and force a
specific framerate if you want something different?
Yes, this works fine. But I would appreciate, if I could use something like
-r=inputrate or --keep_framerate
I've found out,
Am 23.08.21 um 07:15 schrieb Adam Nielsen via ffmpeg-user:
why is the framerate automatically changed here from 29.98 fps to 120
fps, and how can I prevent from this ?
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720, 2508 kb/s, 29.98 fps, 120 tbr, 90k tbn, 2k tb
Am 24.08.21 um 13:51 schrieb Ulf Zibis:
Am 23.08.21 um 07:15 schrieb Adam Nielsen via ffmpeg-user:
why is the framerate automatically changed here from 29.98 fps to 120
fps, and how can I prevent from this ?
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720
Am 23.08.21 um 07:44 schrieb Gyan Doshi:
You can add `-fpsmax 30` with v4.4 or newer. This will limit output rate to 30
if the input is higher else keep the original rate.
With that I get a rate of 30 instead of the original 29.98, so each 50th frame
gets duplicated, which I value as nonse
Am 23.08.21 um 07:15 schrieb Adam Nielsen via ffmpeg-user:
why is the framerate automatically changed here from 29.98 fps to 120
fps, and how can I prevent from this ?
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720, 2508 kb/s, 29.98 fps, 120 tbr, 90k tbn, 2k tb
Hi,
why is the framerate automatically changed here from 29.98 fps to 120 fps, and
how can I prevent from this ?
$ ffmpeg -i Demo\ 31.10.2020\ Köln\ Vorspiel+Zugriff.mp4 -vf
crop=640:320:640:176 Demo\ 31.10.2020\ Köln\ Vorspiel+Zugriff\ Ausschnitt.mp4
ffmpeg version 4.4-static https://johnvans
Am 16.08.21 um 09:44 schrieb Nicolas George:
Ulf Zibis (12021-08-16):
if I understand correct, mp4 videos are encoded in blocks of 16x16
pixels. I I'm wondering if I could crop a video by multiples of 16
pixels without reencoding the remaining blocks.
It depends on the codec, not the f
Am 16.08.21 um 00:48 schrieb Android PowerUser:
Ich muss zugeben die Hardware Anforderungen sind für Smartphones schnell
gestiegen... Ich komm aus einer konservativen Familie. Deshalb habe ich
überhaupt erst seit 2015 mobile Geräte. Deswegen ist der Vergleich auch
unfair. Ich habe zu wenig beach
Am 16.08.21 um 00:32 schrieb Android PowerUser:
That always depends on the codec and probably also on the bit rate and
resolution. MP4 is just a container format.
I mean mp4 with default libx264 codec.
-Ulf
___
ffmpeg-user mailing list
ffmpeg-use
Am 16.08.21 um 00:26 schrieb Android PowerUser:
The 2011 PC probably cost more than I've ever spent on smartphones.
You will tell us, that you spent less money on smartphones over a period of 10
years than 1 PC?
In my experience, the average time of use of smartphones is only 2 - 4 years.
-
Hi,
if I understand correct, mp4 videos are encoded in blocks of 16x16 pixels. I
I'm wondering if I could crop a video by multiples of 16 pixels without
reencoding the remaining blocks.
-Ulf
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https:
Am 28.05.21 um 11:44 schrieb Michael Koch:
Am 28.05.2021 um 11:25 schrieb Flavio Sartoretto:
I use ffmpeg in order to convert fname.flv video to mp4:
ffmpeg -i fname.flv -c:v mpeg4 -copyts -loglevel verbose fname.mp4
The video quality of my output is bad. How can I improve it?
Add -q:v 1 to
Am 16.05.21 um 00:13 schrieb Leo Butler via ffmpeg-user:
Try
convert image.heic image.jpg
Unfortunately it does not work:
$ convert IMG_0416.HEIC IMG_0416.JPG
convert-im6.q16: no decode delegate for this image format `HEIC' @
error/constitute.c/ReadImage/560.
convert-im6.q16: no images defi
Am 16.05.21 um 00:13 schrieb Leo Butler via ffmpeg-user:
Ulf Zibis writes:
Hi,
I have some photos from a iPhone in HEIC format. Is there a chance, to convert them to a
"normal" format?
Try
convert image.heic image.jpg
convert is a program in the imagemagick sui
Hi,
I have some photos from a iPhone in HEIC format. Is there a chance, to convert them to a
"normal" format?
ffplay says:
$ ffplay IMG_0416.HEIC
ffplay version 4.2.4-1ubuntu0.1 Copyright (c) 2003-2020 the FFmpeg developers
built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
configuration: --prefix=/
Am 23.04.21 um 21:20 schrieb Leo Butler via ffmpeg-user:
I would put the select filters before filter_A, etc., rather than after.
I would use the concat filter at the end to concatenate the streams.
Otherwise, out.mp4 ends with 3 parallel video streams.
May be that would work, but I didn't tes
Am 23.04.21 um 08:31 schrieb Gyan Doshi:
On this topic generally, see https://superuser.com/q/1632998/
Much thanks for this hint. I was successful with this approach:
ffmpeg -i 'Stille Tage in Clichy.mpg' -vf
"split=3[a][b][c];[a]trim=0:2888.36,setpts=PTS-STARTPTS,crop=352:496:0:36[a];[b]tri
Am 23.04.21 um 08:07 schrieb Michael Koch:
The "between" function is including at both ends of the interval.
Thanks for the info.
Oh what a pitty ... imagine I set the upper border of the lower range to
10:23.59, the lower border of the upper range to 10:23.60 and there is a frame
at 10:2
Am 23.04.21 um 13:56 schrieb Michael Koch:
Am 23.04.2021 um 13:35 schrieb Nicolas George:
Ulf Zibis (12021-04-23):
I already had checked that. Unfortunately, crop has no timeline support:
How would that work? Enabling or disabling crop changes the output
resolution, which is not supported
Thanks ...
Am 23.04.21 um 09:04 schrieb Michael Koch:
Please have a look at the "streamselect" filter instead of "select".
Will do later.
However the problem might be easier to solve if your filters A, B and C have timeline
support with "enable" option. Use this command to find out if yo
Am 22.04.21 um 13:01 schrieb Michael Koch:
Am 22.04.2021 um 12:50 schrieb Ulf Zibis:
Hi,
I want to filter a video from pts 0 to 1999 with filter A, then from 2000 to
2199 with filter B, from 2200 with filter A and finally the whole stream with
filter C.
Can one please give me an example
Am 22.04.21 um 21:59 schrieb Jim DeLaHunt:
On 2021-04-22 08:26, Ulf Zibis wrote:
…with exact frame count instead unsing -ss, which only counts in seconds?
Just to be sure the obvious is stated out loud: the parameter to -ss can be a
floating-point number, meaning you can make it as precise
Am 22.04.21 um 13:01 schrieb Michael Koch:
untested:
ffmpeg -i input.mp4 -lavfi
split[a][b];[a]filter_A[c];[b]filter_B[d];[c][d]select=bitor(between(t,0,1999),between(t,2200,1)),filter_C
out.mp4
Much thanks for this great help.
To find the time, from where I will change the filter, I
Hi,
I want to filter a video from pts 0 to 1999 with filter A, then from 2000 to
2199 with filter B, from 2200 with filter A and finally the whole stream with
filter C.
Can one please give me an example for a working command line?
-Ulf
___
ffmpeg-u
Am 12.04.21 um 08:53 schrieb Michael Koch:
Am 12.04.2021 um 00:39 schrieb Ulf Zibis:
My question is not about head-switching effects, it mainly is about temporal
noise. E.G., there is the hqdn3d filter, which can do both, spacial and
temporal denoise. But I'm missing some guidance
Hi Christoph,
Am 03.04.21 um 00:42 schrieb Christoph Gerstbauer:
Hello, forget my last mail. The original video is destroyed in the first place.
If you SPLIT the fields from the original MPG you see PER FIELD interlacing
artefacts. That is a sign that the original video from tape was not corre
1 - 100 of 386 matches
Mail list logo
