Cecil Westerhof via ffmpeg-user writes:
> Cecil Westerhof via ffmpeg-user writes:
>
>> Ferdi Scholten writes:
>>
>>> I want to play a video in a video from a certain point. I understood I
>>>> could do something like:
>>>>
Cecil Westerhof via ffmpeg-user writes:
> 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 \
>>>
Michael Koch writes:
> 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:
>>>>
input2.mp4 several times with
the correct -ss. Not really a problem, but I had hoped for a more
efficient way. But I will use it like this for the moment then.
Thanks.
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een(t,8,20)'
" \
-pix_fmt yuv420p \
-c:a copy \
output.mp4
But this starts input2.mp4 from the start of input2.mp4 on the 8
second, for twelve seconds.
Is it possible to let input2.mp4 not start from second 0, but from
second 17?
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Michael Koch writes:
> 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
>>
Ulf Zibis writes:
> 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
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 video A, but
keep the sound of video A.
And at 3:41 I want to do the same thing with video C.
How would I do that?
And what if I want to switch the video and merge the audio?
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Michael Koch writes:
> 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
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
get my contribution into that page?
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the transpose before selecting the parts to
be used. For mpv I added to input.conf:
r cycle_values video-rotate 90 180 270 0
R cycle_values video-rotate 270 180 90 0
and now I can rotate in mpv and do not need a rotated video anymore.
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Cecil Westerhof
Senio
Thank you. I am going to try it out.
> I'm not sure how you manage to collect content from 82.0 to 87.2 in a
> 59 second long video, but I may be missing something. ;-)
My stupidity. It was parts of two different scripts. I have to polish
my workflow, but at the moment I copy the
the transpose merged into the between
statement? In principle that would lead to a little better output
video I think, because it is processed one time less. Or would it not
make much difference?
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Cecil Westerhof via ffmpeg-user writes:
> With the drawtext filter I wanted to use:
> text = '13:30 tot 17:30/18:00':
>
> But this gives:
> Both text and text file provided. Please provide only one
>
> Strangely enough this does not give an error:
>
'13:30 tot 17:30/18\:00':
But I do not understand why the first two do not have to be escaped
and the third does.
I use ffmpeg in a bash script.
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__
Carl Eugen Hoyos writes:
> Am Sa., 12. Nov. 2022 um 13:57 Uhr schrieb Cecil Westerhof via
> ffmpeg-user :
>>
>> Michael Koch writes:
>>
>> > Am 12.11.2022 um 12:39 schrieb Cecil Westerhof via ffmpeg-user:
>> >> I have a few videos that have a 50 fps
Michael Koch writes:
> 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 sam
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.
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lot of experimenting I wrote a bash script that I
use to do this for me with reasonable results.
If interested I could share it.
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Cecil Westerhof via ffmpeg-user writes:
> I am using xfade and drawtext without problems. But now I want to use
> both. But combining the two goes wrong.
>
> I use:
> ffmpeg -ss 308 -t 4 -i 00011-00016.MTS -ss 329 -to 374 -i 00011-00016.MTS
> -pix_fmt yuv420p -vcodec libx2
d.ttf: fontsize =
32:text = © 2022 Cecil Westerhof -
ce...@decebal.nl: x = ((main_w - text_w) / 2): y
= main_h - (text_h * 2)' xfadeMusicalTestTemp/accordeonmuziek.ts
But this gives:
ffmpeg version 4.3.4-0+deb11u1 Co
Paul B Mahol writes:
> On 9/12/22, Cecil Westerhof via ffmpeg-user wrote:
>> Paul B Mahol writes:
>>
>>> On 9/12/22, Cecil Westerhof via ffmpeg-user
>>> wrote:
>>>> For a certain conversion I use '-threads 1'. As I understand it ffmpe
Paul B Mahol writes:
> On 9/12/22, Cecil Westerhof via ffmpeg-user wrote:
>> For a certain conversion I use '-threads 1'. As I understand it ffmpeg
>> should then only use one CPU. I see that the CPU usage is lower as
>> without this parameter, but it goes up
am using ffmpeg version 4.3.4-0+deb11u1. (Debian always lags a
little bit behind to be more stable.)
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htt
Cecil Westerhof via ffmpeg-user writes:
> Paul B Mahol writes:
>
>> On 9/10/22, Cecil Westerhof via ffmpeg-user wrote:
>>> I have to concatenate about 30 videos together with xfade. Because I
>>> did not mange to find a way to do that in one command I wrote a scr
Paul B Mahol writes:
> On 9/10/22, Cecil Westerhof via ffmpeg-user wrote:
>> I have to concatenate about 30 videos together with xfade. Because I
>> did not mange to find a way to do that in one command I wrote a script
>> that does 1 and 2 to 1-2, 3 and 4 to 3-4, 4 and 5
in/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1: Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 48000 Hz,
stereo, fltp (default)
Metadata:
encoder : Lavc58.91.100 libmp3lame
--
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Cecil Westerhof via ffmpeg-user writes:
> Cecil Westerhof via ffmpeg-user writes:
>
>> I need to cut a part out of a video. This video contains chapters and
>> I want to remove this data. I try this with:
>> ffmpeg -y \
>>
Cecil Westerhof via ffmpeg-user writes:
> I need to cut a part out of a video. This video contains chapters and
> I want to remove this data. I try this with:
> ffmpeg -y \
>-ss ${startTime} -to ${endTime} \
>
video.
What do I need to do to get a video without chapters?
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e
apt upgrade
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Paul B Mahol writes:
> On Mon, Jul 4, 2022 at 11:30 PM Michael Koch
> wrote:
>
>> Am 04.07.2022 um 18:46 schrieb Cecil Westerhof via ffmpeg-user:
>> > Paul B Mahol writes:
>> >
>> >> On Mon, Jul 4, 2022 at 6:15 PM Cecil Westerhof via ffmp
Paul B Mahol writes:
> On Mon, Jul 4, 2022 at 6:15 PM Cecil Westerhof via ffmpeg-user <
> ffmpeg-user@ffmpeg.org> wrote:
>
>> Some time ago I was experimenting with xfade. I wanted to know how to
>> use several in one run. Now I really needed it, so I did som
ion=4:
offset=2211[v9]
" \
-map '[v9]' -map '[a9]' \
output.mkv
I hope there are better ways, because there are some problems with it.
For example it needs a lot of memory. (24 GB)
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Cecil Westerhof via ffmpeg-user writes:
> To overlay a picture on a video I use at the moment:
> ffmpeg -y \
>-ss 21:50 -to 24:30 -i input.MTS \
>-i Photos/Shrinked/input1.jpg\
>
t I cannot find
how to do this. How can I overlay several photos (transparently) on
the video at different time intervals?
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Bouke / Videotoolshed writes:
> Pff, make it an option.
You probably would tell a homeless person that is hungry and cold:
just put on clothes and eat something.
(Without providing him anything.)
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420p -c:a:0 copy -vcodec libx264 -preset veryfast
> -crf 26 \
> -t 30 greenScreen.mp4
>
> How can I get the audio into the output?
Found it. I just need to use:
-map 0:a
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Cecil Westerhof via ffmpeg-user writes:
> Cecil Westerhof via ffmpeg-user writes:
>
>> Paul B Mahol writes:
>>
>>> On Wed, Jun 29, 2022 at 10:05 AM Bouke / Videotoolshed <
>>> bo...@videotoolshed.com> wrote:
>>>
>>>> On 29 Jun 202
Bouke / Videotoolshed writes:
>> On 29 Jun 2022, at 12:54, Cecil Westerhof via ffmpeg-user
>> wrote:
>>
>> Bouke / Videotoolshed writes:
>>
>>> No, sorry. But, hire an editor / designer to do this for you,
>>> results will be better / less pa
Cecil Westerhof via ffmpeg-user writes:
> Paul B Mahol writes:
>
>> On Wed, Jun 29, 2022 at 10:05 AM Bouke / Videotoolshed <
>> bo...@videotoolshed.com> wrote:
>>
>>> On 29 Jun 2022, at 01:48, Cecil Westerhof via ffmpeg-user <
>>> ffmpeg-user@
ical) , so I cannot spend money on it.
But I got a bit farther. While not perfect, it certainly is not bad.
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Paul B Mahol writes:
> On Wed, Jun 29, 2022 at 10:05 AM Bouke / Videotoolshed <
> bo...@videotoolshed.com> wrote:
>
>> On 29 Jun 2022, at 01:48, Cecil Westerhof via ffmpeg-user <
>> ffmpeg-user@ffmpeg.org> wrote:
>> >
>> >
>> > The ba
Bouke / Videotoolshed writes:
> On 29 Jun 2022, at 01:48, Cecil Westerhof via ffmpeg-user
> wrote:
>>
>>
>> The background of the photo is white. Would it be possible to make
>> that transparent? (So where there is white, I do not see white, but
>> the
-acodec copy -vcodec libx264 -preset veryfast -crf
26 \
output.mp4
The background of the photo is white. Would it be possible to make
that transparent? (So where there is white, I do not see white, but
the video.)
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y fail to play on mobile devices.
Try it with:
-pix_fmt yuv420p
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Thanks for the very speedy reply. :-D
Michael Koch writes:
> Am 16.06.2022 um 13:11 schrieb Cecil Westerhof via ffmpeg-user:
>> At the moment I am making a slideshow like the following:
>>
>> zoompan=zoompan=d=3:fps=.333:s=1280x960,framerate=25:interp_start=0:int
345ab40] kb/s:1390.74
[aac @ 0x55ce8347e7c0] Qavg: 533.159
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Carl Zwanzig writes:
> On 6/14/2022 4:24 PM, Cecil Westerhof via ffmpeg-user wrote:
>> What is happening here?
>
> What's happening is that you're not posting the complete command output,
> and possibly not using the most current ffmpeg.
fmpeg version 4.3.4-0+deb11u1
Reindl Harald writes:
> Am 15.06.22 um 16:25 schrieb Cecil Westerhof via ffmpeg-user:
>> Lately I am doing a lot with ffmpeg again.
>> But I have a strange problem.
>> Sometimes I send mp4 through WhatsApp.
>> Sometimes I see the thumbnail, sometimes I do not.
>>
plays only audio.
And another it cannot be played.
What can be happening here?
And could I do something about it by changing the parameters I use for
ffmpeg?
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:
deprecated pixel format used, make sure you did set range
correctly
What is happening here?
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https
e size can be between 1/6 and 1/14 of the file size of the
input file.
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Michael Koch writes:
> Am 14.06.2022 um 15:33 schrieb Cecil Westerhof via ffmpeg-user:
>> Michael Koch writes:
>>
>>> Am 14.06.2022 um 13:47 schrieb Cecil Westerhof via ffmpeg-user:
>>>> Sometimes I have to cut parts out of a video. I now use for this (bash
Michael Koch writes:
> Am 14.06.2022 um 13:47 schrieb Cecil Westerhof via ffmpeg-user:
>> Sometimes I have to cut parts out of a video. I now use for this (bash on
>> Debian):
>> ffmpeg -y\
>> -ss ${vid
1:a=1" \
-an ${outputFile}
But the cut from one part to another is a bit abrupt. Is there a
possibility to smooth it with something like a fade?
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Cecil Westerhof via ffmpeg-user writes:
> Michael Koch writes:
>
>> Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user:
>>> Michael Koch writes:
>>>
>>>> I have a short example in chapter 2.57 of my book:
>>>> http://www.astro
picture missing during reorder
[h264 @ 0x5579d034c8c0] Missing reference picture, default is 2147483647
[h264 @ 0x5579d0875500] mmco: unref short failure
[h264 @ 0x5579d050d600] mmco: unref short failure
[libx264 @ 0x5579d0596bc0] using SAR=1/1
The generate video looks OK.
Is this something to worry abo
Rob Hallam writes:
> On Mon, 13 Jun 2022 at 11:26, Cecil Westerhof via ffmpeg-user
> wrote:
>> That could very seldom work, but is certainly not a general solution.
>> In the past I was told to do it like this because it was faster. Then
>> I got problems with the
Rob Hallam writes:
> On Mon, 13 Jun 2022 at 11:26, Cecil Westerhof via ffmpeg-user
> wrote:
>> That could very seldom work, but is certainly not a general solution.
>> In the past I was told to do it like this because it was faster. Then
>> I got problems with the
Rob Hallam writes:
> On Mon, 13 Jun 2022 at 10:40, Cecil Westerhof via ffmpeg-user
> wrote:
>> I know that because of iframes you need to put the inputfile before
>> the start and to parameters if you want to sure that the start time is
>> correctly used. Because of this
as 1¼ hour into the video.
I am not using ffmpeg that much so maybe I am asking something stupid.
Would it not be possible to skip to the last iframe before the start?
Or should I be doing things completly differently?
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Michael Koch writes:
> Am 31.05.2022 um 18:43 schrieb Cecil Westerhof via ffmpeg-user:
>> Michael Koch writes:
>>
>>> I have a short example in chapter 2.57 of my book:
>>> http://www.astro-electronic.de/FFmpeg_Book.pdf
>> Just to make sure I un
-ss %S3% -t %L3% \
-lavfi "concat=n=3:v=1:a=0" \
-an %OUT%
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Paul B Mahol writes:
> On Sun, May 29, 2022 at 12:27 PM Cecil Westerhof wrote:
>
> Paul B Mahol writes:
>
> > On Sat, May 28, 2022 at 9:46 PM Cecil Westerhof via ffmpeg-user
> wrote:
> >
> > Paul B Mahol writes:
> >
> > > On Sat, Ma
nly an option for later.
Thanks.
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Michael Koch writes:
> Am 28.05.2022 um 21:17 schrieb Cecil Westerhof via ffmpeg-user:
>> Paul B Mahol writes:
>>
>>> On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user
>>> wrote:
>>>
>>> When I just want to have a cer
Paul B Mahol writes:
> On Sat, May 28, 2022 at 9:46 PM Cecil Westerhof via ffmpeg-user
> wrote:
>
> Paul B Mahol writes:
>
> > On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user
> wrote:
> >
> > When I just want to have a certain
Paul B Mahol writes:
> On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user
> wrote:
>
> When I just want to have a certain part of a video, I can do something
> like:
> ffmpeg -y -i input.MTS \
> -ss 00:08 \
&g
want to much?
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But what if I want several parts of a video in my video?
Do I need to cut the different parts out of the video and concatenate
them, or is it possible to do it with one command?
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-safe 0 -i combined.txt -c copy mergedAudio.mp4
I should have thought about that.
I do it a little bit differently:
files=$(
for i in $(seq 1 4) ; do
printf "file $(pwd)/audio%d.mp4\n" $i
done
)
ffmpeg -y -f concat -safe 0 -i <(echo "${
to know if it could be done in one swoop. Now
the video is converted two times.
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Michael Koch writes:
> Am 24.05.2022 um 21:55 schrieb Cecil Westerhof via ffmpeg-user:
>> With a search on the internet I found I could put a picture into a
>> video with:
>> ffmpeg -i introductie.mkv -i Pictures/reiger.jpg \
>> -filter_complex "[
quot;-crf" (if using libx264 or libx265). There is a lot of
> information about that available.
Of-course, should have thought about that. :'-(
Changed the last but one line to:
-pix_fmt yuv420p -c:a copy -vcodec libx265 -preset veryfast -crf 30 \
And now the output fil
would insert another picture at another time?
Or two at the same time? One top left, the other top right.
What I find strange is that the input video is 23 MB and the picture
is 302 KB, but the generated video is 42 MB.
Am I doing something wrong?
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Bouke / Videotoolshed writes:
>> On 21 Dec 2021, at 19:37, Cecil Westerhof via ffmpeg-user
>> wrote:
>>
>> Cecil Westerhof via ffmpeg-user writes:
>>
>> After some experiments I solved it by putting -ss and -to behind -i
>> and not forgetting to a
Cecil Westerhof via ffmpeg-user writes:
After some experiments I solved it by putting -ss and -to behind -i
and not forgetting to alter the between values.
But this takes about a third more time.
Is there be a better solution?
I am now using:
ffmpeg -y
hing: both mpv and vlc think it is 00:55:52 long.
Which it is not: it stops where it should 00:17:59.
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ht
Cecil Westerhof via ffmpeg-user writes:
> Ferdi Scholten writes:
>
>> On 15-12-2021 18:18, Cecil Westerhof via ffmpeg-user wrote:
>>> When looking at:
>>> https://trac.ffmpeg.org/wiki/Encode/H.265
>>>
>>> with h.265 the value 28 should cor
Rob Hallam writes:
> On Wed, 15 Dec 2021 at 18:06, Cecil Westerhof via ffmpeg-user
> wrote:
>
>> Does YouTube has a preference for one, or the other?
>
> YT accepts both, and has h264 encoding suggestions:
> https://support.google.com/youtube/answer/1722171
>
> As
Ferdi Scholten writes:
> On 15-12-2021 18:18, Cecil Westerhof via ffmpeg-user wrote:
>> When looking at:
>> https://trac.ffmpeg.org/wiki/Encode/H.265
>>
>> with h.265 the value 28 should correspond with the value 23 with
>> h.264.
>> Is there a (rough
When looking at:
https://trac.ffmpeg.org/wiki/Encode/H.265
with h.265 the value 28 should correspond with the value 23 with
h.264.
Is there a (rough) table for the other values?
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Michael Koch writes:
> Am 11.12.2021 um 22:24 schrieb Cecil Westerhof via ffmpeg-user:
>> I gave a speech on zoom. It was recorded, but sadly together with
>> others. So I want to crop my part out of it. At the moment this works:
>> ffmpeg -y -i input.mp4 -filter:v
I gave a speech on zoom. It was recorded, but sadly together with
others. So I want to crop my part out of it. At the moment this works:
ffmpeg -y -i input.mp4 -filter:v "crop=480:360:80:180" output.mp4
Was just wondering if there was a better way.
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Cecil Westerhof via ffmpeg-user writes:
> I need to cut a part out of a video. (A certain speaker does not want
> to be published.)
> Searching on the internet I found this:
> Following is a snippet we used to remove a few seconds from a video using
> ffmpeg
>
>
output.mkv'
Specifically, we removed the seconds 09:13 (second 553) to 09:19 (second
559).
Is this the correct way to do it (after setting the correct
timestamps), or is there a better way?
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workaround.
But as far as I can see the output.mkv is OK. What is happening here?
Is it important that I run it again with:
-avoid_negative_ts 1
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
___
ffmpeg-user
Michael Koch writes:
> Am 19.09.2021 um 12:42 schrieb Cecil Westerhof via ffmpeg-user:
>> Michael Koch writes:
>>
>>>> As Michael Koch said:
>>>> The content of the variable "text_h" depends on which characters
>>>>
appen often, so I can live
>> with that.
>
> In your case with the words "speaker" and "subject" it works, but
> generally it fails.
> For example if you remove the character "k" from "speaker", then the
> vertical alignment will be wrong.
Cecil Westerhof via ffmpeg-user writes:
> I have several of the following (simplified):
> drawtext=
>enable = 'between(t, 105, 115)':
>text = 'speaker':
>y = main_h - (text_h * 4),
> drawtext=
>
Michael Koch writes:
> Am 18.09.2021 um 18:07 schrieb Cecil Westerhof via ffmpeg-user:
>> I have several of the following (simplified):
>> drawtext=
>> enable = 'between(t, 105, 115)':
>> text = 'speaker'
Paul B Mahol writes:
> On Sat, Sep 18, 2021 at 6:07 PM Cecil Westerhof via ffmpeg-user <
> ffmpeg-user@ffmpeg.org> wrote:
>
>> I have several of the following (simplified):
>> drawtext=
>>enable = 'between(t, 105, 115)':
&g
e other is different, sometimes
both and sometimes they are the same.
Is this a bug, or am I doing something wrong?
--
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof
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ffmpeg-user@ffmpeg
Cecil Westerhof via ffmpeg-user writes:
> Paul B Mahol writes:
>
>>> > What exactly you tried?
>>>
>>> What you suggested:
>>> ffmpeg -i 09-Improvisaties.mp4 -i evaluaties.txt -map_chapters 1
>>> -codec copy 09-Improvisati
>>>
han mp4
>
> If works fine with .nut
Yes it works with .nut. But I have to distribute it. You cannot play a
.nut file with the default player on Android. You have to install VLC.
I have to investigate if that (or something else) is a problem.
--
Cecil Westerhof
Senior Software
Paul B Mahol writes:
> On Fri, Sep 17, 2021 at 11:07 PM Cecil Westerhof via ffmpeg-user <
> ffmpeg-user@ffmpeg.org> wrote:
>
>> Paul B Mahol writes:
>>
>> > On Fri, Sep 17, 2021 at 10:33 PM Cecil Westerhof via ffmpeg-user <
>> > ffmpeg-user@ff
Paul B Mahol writes:
> On Fri, Sep 17, 2021 at 10:33 PM Cecil Westerhof via ffmpeg-user <
> ffmpeg-user@ffmpeg.org> wrote:
>
>> Paul B Mahol writes:
>>
>> > On Fri, Sep 17, 2021 at 9:34 PM Cecil Westerhof via ffmpeg-user <
>> > ffmpeg-user@f
Paul B Mahol writes:
> On Fri, Sep 17, 2021 at 9:34 PM Cecil Westerhof via ffmpeg-user <
> ffmpeg-user@ffmpeg.org> wrote:
>
>> Cecil Westerhof via ffmpeg-user writes:
>>
>> When I put before the first chapter:
>> [CHAPTER]
>> TIMEBASE
Cecil Westerhof via ffmpeg-user writes:
When I put before the first chapter:
[CHAPTER]
TIMEBASE=1/1
START=1
END=2
title=
I get:
Input #1, ffmetadata, from 'evaluaties.txt':
Metadata:
title : Improvisations
Duration: 00:16:35
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