Re: [FFmpeg-user] DNG images

Am 11.10.2020 um 20:56 schrieb Paul B Mahol: On Sun, Oct 11, 2020 at 07:37:25PM +0200, Michael Koch wrote: I tested all 4 DNG images again with the latest FFmpeg version (Gyan's build from today). I tested with and without zscale filter. All tests failed. When testing with IrfanView, al

Re: [FFmpeg-user] DNG images

Am 11.10.2020 um 21:07 schrieb Michael Koch: Am 11.10.2020 um 20:56 schrieb Paul B Mahol: On Sun, Oct 11, 2020 at 07:37:25PM +0200, Michael Koch wrote: I tested all 4 DNG images again with the latest FFmpeg version (Gyan's build from today). I tested with and without zscale filter. All

[FFmpeg-user] find_rect, suggestion for improvement

Hello, I'd like to propose an improvement for the find_rect filter. In my application the object is quite small (10x10 pixels) and slowly moving over half of the image size. I did already narrow down the search area with the xmin, xmax, ymin, ymax options, and I did optimize the threshold value

Re: [FFmpeg-user] Converting text to video for dictation

Am 20.10.2020 um 06:46 schrieb John B Morris: Hello all, typography effects based video So that one is basically what I'm looking to do with ffmpeg - turn a subtitle file (of any type) into a transparent backgrounded (?) video for use in my video editor to combine the necessary contents together

[FFmpeg-user] afreqshift

Hi, I'm just testing the new afreqshift filter. In my first test I did use only *.wav audio files. This test was successful. In my next test I'm using MP4 files. First I make a test video with a 5kHz tone: ffmpeg -f lavfi -i sine=f=5000:r=48000:d=5 -f lavfi -i color=black -lavfi showspectrum=l

Re: [FFmpeg-user] afreqshift

Am 21.10.2020 um 20:36 schrieb Paul B Mahol: On Wed, Oct 21, 2020 at 08:14:50PM +0200, Michael Koch wrote: Hi, I'm just testing the new afreqshift filter. In my first test I did use only *.wav audio files. This test was successful. In my next test I'm using MP4 files. First I m

Re: [FFmpeg-user] afreqshift

Am 21.10.2020 um 21:02 schrieb Michael Koch: Am 21.10.2020 um 20:36 schrieb Paul B Mahol: On Wed, Oct 21, 2020 at 08:14:50PM +0200, Michael Koch wrote: Hi, I'm just testing the new afreqshift filter. In my first test I did use only *.wav audio files. This test was successful. In my

[FFmpeg-user] Problem in v360?

Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180° and height +45° should be in the center. It is nearby,

Re: [FFmpeg-user] Problem in v360?

Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180

Re: [FFmpeg-user] Problem in v360?

Am 23.10.2020 um 18:46 schrieb Michael Koch: Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means afte

Re: [FFmpeg-user] Problem in v360?

Am 24.10.2020 um 11:03 schrieb Michael Koch: Am 23.10.2020 um 18:46 schrieb Michael Koch: Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation

Re: [FFmpeg-user] Problem in v360?

Am 25.10.2020 um 03:02 schrieb Edward Park: Hi, After a deeper look into the quaternion multiplication, it seems to be correct. The terms are only written in a different order in the Wikipedia article. But it's a fact that the v360 rotations are broken, as can be shown by this simple test: Y

Re: [FFmpeg-user] Problem in v360?

Am 25.10.2020 um 09:05 schrieb Michael Koch: Am 25.10.2020 um 03:02 schrieb Edward Park: Hi, After a deeper look into the quaternion multiplication, it seems to be correct. The terms are only written in a different order in the Wikipedia article. But it's a fact that the v360 rotation

Re: [FFmpeg-user] repair black frames?

Am 25.10.2020 um 16:23 schrieb Simon Roberts: Greetings all, I have just noticed that some of my video recordings have a few random black frames in them. These will be spaced out a few minutes, don't seem to have any obvious cause (though my recording system is a little Heath Robinson / Rube Gol

[FFmpeg-user] zmq example

Hello, I'm testing this command line which is copied from the documentation: https://www.ffmpeg.org/ffmpeg-all.html#zmq_002c-azmq ffplay -dumpgraph 1 -f lavfi "color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay@my=x=100" The prob

Re: [FFmpeg-user] Problem in v360?

Am 23.10.2020 um 17:19 schrieb Michael Koch: Hello, It seems there is a problem in the v360 filter. This command line doesn't rotate the correct point to the image center. The default rotation order should be yaw pitch roll, which means after the rotation the point with azimut 180

Re: [FFmpeg-user] zmq example

Am 28.10.2020 um 21:07 schrieb Gyan Doshi: On 28-10-2020 12:21 am, Michael Koch wrote: Hello, I'm testing this command line which is copied from the documentation: https://www.ffmpeg.org/ffmpeg-all.html#zmq_002c-azmq ffplay -dumpgraph 1 -f lavfi "color=s=100x100:c=red[l];color=s

[FFmpeg-user] start FFplay without console window?

Is it possible to start FFplay (from a C# application) so that only the video window is visible, while the console window is hidden or minimized? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-use

Re: [FFmpeg-user] start FFplay without console window?

Am 30.10.2020 um 13:53 schrieb Moritz Barsnick: Hallo Michael, On Fri, Oct 30, 2020 at 01:29:04 +0100, Michael Koch wrote: Is it possible to start FFplay (from a C# application) so that only the video window is visible, while the console window is hidden or minimized? That's more o

[FFmpeg-user] dshow video source in FFplay

Hello, I'm using a cheap HDMI to USB converter for video input. The converter supports different sizes and framerates and two different video codecs. This command line works as expected: ffplay -f dshow -video_size 1920x1080 -framerate 30 -vcodec mjpeg video="USB Video" However for my appl

Re: [FFmpeg-user] dshow video source in FFplay

Am 01.11.2020 um 19:07 schrieb Carl Eugen Hoyos: Am So., 1. Nov. 2020 um 11:03 Uhr schrieb Michael Koch : I'm using a cheap HDMI to USB converter for video input. The converter supports different sizes and framerates and two different video codecs. This command line works as expected: f

Re: [FFmpeg-user] Stream specifier ':a' in filtergraph Error

Am 10.11.2020 um 22:27 schrieb Randy Johnson via ffmpeg-user: Hello, When running the following command: ``` ffmpeg \ -loop 1 -framerate 30 -t 1.4 -i /assets/img/filler640480.jpg -i 0d.mp4 - y \ -loop 1 -framerate 30 -t 891.113 -i /assets/img/filler640480.jpg -i 9f.mp4 -y \ -f lavfi -t 0.1 -i a

[FFmpeg-user] Add a silent audio stream if no audio stream exists

Am 11.11.2020 um 21:59 schrieb Jim DeLaHunt: 2. Generate a more elaborate FFmpeg invocation which will generate silent audio streams for input files which have none. The details of this should be in a separate thread with a separate Subject: line. That's an interesting question. Can this b

[FFmpeg-user] Best place for despill filter?

When I overlay a bluescreen foreground video over a background video, which is the best place for the despill filter? (a) before colorkey or (b) after colorkey or (c) after overlay? [foreground](a),colorkey,(b)[fg];[background][fg]overlay,(c) I found here an example for (c) but I doubt that th

Re: [FFmpeg-user] Best place for despill filter?

Am 16.11.2020 um 12:22 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:13 PM Michael Koch wrote: When I overlay a bluescreen foreground video over a background video, which is the best place for the despill filter? (a) before colorkey or (b) after colorkey or (c) after overlay? [foreground

Re: [FFmpeg-user] Best place for despill filter?

Am 16.11.2020 um 16:12 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:41 PM Michael Koch wrote: Am 16.11.2020 um 12:22 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:13 PM Michael Koch < astroelectro...@t-online.de> wrote: When I overlay a bluescreen foreground video

Re: [FFmpeg-user] Best place for despill filter?

Am 16.11.2020 um 16:12 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:41 PM Michael Koch wrote: Am 16.11.2020 um 12:22 schrieb Paul B Mahol: On Mon, Nov 16, 2020 at 12:13 PM Michael Koch < astroelectro...@t-online.de> wrote: When I overlay a bluescreen foreground video

Re: [FFmpeg-user] Best place for despill filter?

Am 16.11.2020 um 20:01 schrieb Paul B Mahol: Is it possible to send zmq messages to the despill filter? I want to adjust the mix, expand and brightness parameters in real time. I'm sending the zmq messages from my own C# program. Messages to colorkey (color, similarity) and overlay (x, y) are alr

Re: [FFmpeg-user] ffmpeg: slide show on Windows

Am 17.11.2020 um 11:50 schrieb RAPPAZ Francois via ffmpeg-user: I'm on Windows 10 with ffmpeg ... Then I tried with ffmpeg -y -f image2 -framerate 8 -i "%02d.JPG" -i SligoAir_WhiteBlanket.mp3 -vsync vfr -pix_fmt yuv420p output.mkv If you are starting this command line from a batch file, you

Re: [FFmpeg-user] ffmpeg: slide show on Windows

Am 17.11.2020 um 14:09 schrieb RAPPAZ Francois via ffmpeg-user: Thanks that was it And if I Would like to have each image shown during 15 seconds (I have 15 pictures and whants the total time being 225 sec), How should I specified the -framerate and -r ? I tried ffmpeg -y -f image2 -framerate

Re: [FFmpeg-user] Slide show with transition

Am 17.11.2020 um 16:05 schrieb RAPPAZ Francois via ffmpeg-user: I have 15 JPEG file to be used for a slide (duration: 135 sec): Each image is display 9 seconds and without transition the mkv file is ok. I tried this for a transition 1 second long ffmpeg -y -framerate 1/9 -i %%02d.JPG -i SligoAi

Re: [FFmpeg-user] Slide show with transition

Am 18.11.2020 um 09:50 schrieb RAPPAZ Francois via ffmpeg-user: I have 15 JPEG file to be used for a slide (duration: 135 sec): Each image is display 9 seconds and without transition the mkv file is ok. I tried this for a transition 1 second long ffmpeg -y -framerate 1/9 -i %%02d.JPG -i SligoAi

Re: [FFmpeg-user] Best place for despill filter?

Am 18.11.2020 um 14:40 schrieb Moritz Barsnick: On Mon, Nov 16, 2020 at 20:15:54 +0100, Michael Koch wrote: Oh, what a pity. We need more filters with support for commands. Now that I have found out how to send zmq commands from C# code, there are so many nice things that could be done with

Re: [FFmpeg-user] Slide show with transition

Am 18.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: The problem is that your images 3 and 4 have different size. As far as I know, FFmpeg can't combine images with different sizes to a slideshow (please correct me if I'm >wrong). By the way, all images must also have the same pixel

Re: [FFmpeg-user] crop and fade

Am 19.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: Hi I tried the fading between pictures and cropping to there original size (5152 x 3864), so that they are not distorted ffmpeg -y -i %%02d.JPG -i SligoAir_WhiteBlanket.mp3 ^ -vf zoompan=d=10:fps=1,framerate=fps=25:interp_start=0:

Re: [FFmpeg-user] Best place for despill filter?

Am 19.11.2020 um 13:19 schrieb Paul B Mahol: Added commands to despill and frei0r filters. thank you! I'll test it in a few days when the Windows build is available. Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mail

Re: [FFmpeg-user] {Spam?} Re: crop and fade

Am 20.11.2020 um 07:27 schrieb RAPPAZ Francois via ffmpeg-user: Am 19.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: Hi I tried the fading between pictures and cropping to there original size (5152 x 3864), so that they are not distorted ffmpeg -y -i %%02d.JPG -i SligoAir_WhiteBlank

Re: [FFmpeg-user] {Spam?} Re: crop and fade

Am 20.11.2020 um 10:58 schrieb RAPPAZ Francois via ffmpeg-user: Am 19.11.2020 um 16:37 schrieb RAPPAZ Francois via ffmpeg-user: Hi I tried the fading between pictures and cropping to there original size (5152 x 3864), so that they are not distorted ffmpeg -y -i %%02d.JPG -i SligoAir_Whit

Re: [FFmpeg-user] {Spam?} Re: crop and fade

Am 20.11.2020 um 11:59 schrieb RAPPAZ Francois via ffmpeg-user: I think the command line is correct, and the hint from Gyan was of course correct. The problem might be that your video player can't display 25fps at this extremely high resolution. Try a smaller resolution. It makes no sense to us

Re: [FFmpeg-user] Directly converting DNGs to MP4

Am 08.11.2020 um 18:12 schrieb ZEITFELD: Hello nice girls ans guys! I have a highspeed camera that records raw data to DNG files. Now I try to have the fastest possible preview video of what is recorded. I succeeded using the GPU via FFMPEG, which is absolutely the fastest way I found until

Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3

Am 23.11.2020 um 13:50 schrieb KarlMessner: Good morning folks, Any idea what I'm doing wrong here: /usr/local/bin/ffmpeg -report -i videos/intro720.mp4 -i videos/raw.mp4 -i videos/outro720.mp4 -i videos/music.mp3 -filter_complex " \ [0] scale=1280:720:force_original_aspect_ratio=decrease,pad=1

Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3

Am 23.11.2020 um 13:50 schrieb KarlMessner: Good morning folks, Any idea what I'm doing wrong here: /usr/local/bin/ffmpeg -report -i videos/intro720.mp4 -i videos/raw.mp4 -i videos/outro720.mp4 -i videos/music.mp3 -filter_complex " \ [0] scale=1280:720:force_original_aspect_ratio=decrease,pad=1

Re: [FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3

Am 23.11.2020 um 16:14 schrieb Karl Messner: Michael, Thank you so much for your help. I made the changes you suggested and now I'm getting this: ffmpeg -report -i videos/intro720.mp4 -i videos/raw.mp4 -i videos/outro720.mp4 -i videos/music.mp3 -filter_complex " \ [0]scale=1280:720:force_ori

Re: [FFmpeg-user] asubboost and asupercut

Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch wrote: Hello, I have a few questions about the asubboost and asupercut filters. -- In asubboost it's not yet clear how the block diagram of the filter looks like. Especially the "decay"

Re: [FFmpeg-user] asubboost and asupercut

Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 7:09 PM Michael Koch < astroelectro...@t-online.de> wrote: Hello, I have a few questions about the asubboo

Re: [FFmpeg-user] asubboost and asupercut

Am 27.11.2020 um 22:47 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 10:40 PM Michael Koch wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri,

Re: [FFmpeg-user] asubboost and asupercut

Am 27.11.2020 um 23:27 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 11:20 PM Michael Koch wrote: Am 27.11.2020 um 22:47 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 10:40 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri,

Re: [FFmpeg-user] asubboost and asupercut

Am 28.11.2020 um 12:57 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 12:41 PM Michael Koch wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri, Nov 27, 2020 at 8:24 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 19:25 schrieb Paul B Mahol: On Fri,

Re: [FFmpeg-user] asubboost and asupercut

Am 28.11.2020 um 13:44 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 1:35 PM Michael Koch wrote: Am 28.11.2020 um 12:57 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 12:41 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 27.11.2020 um 20:50 schrieb Paul B Mahol: On Fri,

Re: [FFmpeg-user] asubboost and asupercut

Am 28.11.2020 um 14:48 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 2:46 PM Paul B Mahol wrote: On Sat, Nov 28, 2020 at 2:24 PM Michael Koch wrote: Am 28.11.2020 um 13:44 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 1:35 PM Michael Koch < astroelectro...@t-online.de> wrote

Re: [FFmpeg-user] asubboost and asupercut

Am 28.11.2020 um 19:18 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 5:18 PM Michael Koch wrote: Am 28.11.2020 um 14:48 schrieb Paul B Mahol: On Sat, Nov 28, 2020 at 2:46 PM Paul B Mahol wrote: On Sat, Nov 28, 2020 at 2:24 PM Michael Koch < astroelectro...@t-online.de> wrote

Re: [FFmpeg-user] asubboost and asupercut

Am 28.11.2020 um 22:09 schrieb Paul B Mahol: Ok, made the wet option do actually apply gain to final output. I think the asubboost block diagram does now look like this (view with fixed width font): IN -o> DRY ---> ADD -> WET -> OUT     |  

[FFmpeg-user] v360 / perspective

Hello, there seem to be some problems in the v360 filter with "perspective" output. Tested with the latest Windows built, 2 days old. You can reproduce this with any equirectangular input image. ffmpeg -i equirectangular_test.png -lavfi v360=e:perspective -y out1.png The output of the above c

Re: [FFmpeg-user] v360 / perspective

Am 01.12.2020 um 19:56 schrieb Michael Koch: Hello, there seem to be some problems in the v360 filter with "perspective" output. Tested with the latest Windows built, 2 days old. You can reproduce this with any equirectangular input image. ffmpeg -i equirectangular_test.png -

Re: [FFmpeg-user] How do I decode once and pass frames to multiple destinations

Am 03.12.2020 um 11:57 schrieb Simon Brown: I have used ffmpeg for a number of different things, including decoding streams, transcoding format, encoding streams, etc. It's a wonderful tool. Now I want to design something that can do three things at the same time, eg a) display a stream on a mo

Re: [FFmpeg-user] v360 / perspective

Am 04.12.2020 um 18:14 schrieb Paul B Mahol: On Wed, Dec 2, 2020 at 11:11 PM Michael Koch wrote: Am 01.12.2020 um 19:56 schrieb Michael Koch: Hello, there seem to be some problems in the v360 filter with "perspective" output. Tested with the latest Windows built, 2 days ol

Re: [FFmpeg-user] v360 / perspective

Am 04.12.2020 um 19:06 schrieb Paul B Mahol: On Fri, Dec 4, 2020 at 6:58 PM Michael Koch wrote: Am 04.12.2020 um 18:14 schrieb Paul B Mahol: On Wed, Dec 2, 2020 at 11:11 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 01.12.2020 um 19:56 schrieb Michael Koch: Hello, ther

Re: [FFmpeg-user] v360 / perspective

Am 04.12.2020 um 18:14 schrieb Paul B Mahol: On Wed, Dec 2, 2020 at 11:11 PM Michael Koch wrote: Am 01.12.2020 um 19:56 schrieb Michael Koch: Hello, there seem to be some problems in the v360 filter with "perspective" output. Tested with the latest Windows built, 2 days ol

Re: [FFmpeg-user] v360 / perspective

Am 05.12.2020 um 11:38 schrieb Paul B Mahol: On Sat, Dec 5, 2020 at 11:02 AM Michael Koch wrote: Am 04.12.2020 um 18:14 schrieb Paul B Mahol: On Wed, Dec 2, 2020 at 11:11 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 01.12.2020 um 19:56 schrieb Michael Koch: Hello,

Re: [FFmpeg-user] v360 / perspective

Am 05.12.2020 um 13:03 schrieb Paul B Mahol: On Sat, Dec 5, 2020 at 12:30 PM Michael Koch wrote: Am 05.12.2020 um 11:38 schrieb Paul B Mahol: On Sat, Dec 5, 2020 at 11:02 AM Michael Koch < astroelectro...@t-online.de> wrote: Am 04.12.2020 um 18:14 schrieb Paul B Mahol: On Wed,

Re: [FFmpeg-user] v360 / perspective

Am 05.12.2020 um 21:00 schrieb Michael Koch: Am 05.12.2020 um 13:03 schrieb Paul B Mahol: On Sat, Dec 5, 2020 at 12:30 PM Michael Koch wrote: Am 05.12.2020 um 11:38 schrieb Paul B Mahol: On Sat, Dec 5, 2020 at 11:02 AM Michael Koch < astroelectro...@t-online.de> wrote: Am 04.12.2

Re: [FFmpeg-user] Pan and scan

Am 16.12.2020 um 17:34 schrieb adam smith via ffmpeg-user: Hi guys, I am looking at turning 16x9 content into 1x1 I want to be able to specify the source area that should be used for the output in 1 second increments and move between them smoothly. It looks like I could perhaps use the crop fi

Re: [FFmpeg-user] Does v360 filter support dewarping circular fisheye images?

Am 24.12.2020 um 10:42 schrieb thongtm2: I have a fisheye camera (360 degrees in horizontal & 180 degrees in vertical). Is it possible to use v360 filter to dewarp circular fisheye images to single perspective images (flatten fisheye images)? I've tried many options but the results were not as I

Re: [FFmpeg-user] HEVC trouble

Am 24.12.2020 um 12:18 schrieb Carl Eugen Hoyos: Am Mi., 23. Dez. 2020 um 16:42 Uhr schrieb Michael : Still trying to export an HEVC 4096x2048 file with copied audio @100Mbps from ProRes 422 HQ of same size and frame rate. You cannot put pcm in mp4, this is not a limitation of FFmpeg. Use the

Re: [FFmpeg-user] Does v360 filter support dewarping circular fisheye images?

Am 24.12.2020 um 13:51 schrieb Paul B Mahol: On Thu, Dec 24, 2020 at 12:25 PM Michael Koch wrote: Am 24.12.2020 um 10:42 schrieb thongtm2: I have a fisheye camera (360 degrees in horizontal & 180 degrees in vertical). Is it possible to use v360 filter to dewarp circular fisheye image

[FFmpeg-user] v360: filling unmapped pixels with a color

Hello, In the v360 filter the alpha_mask option can be used to make unmapped pixels transparent. What's the simplest method for filling all transparent pixels with a color? Let's assume the size of the video isn't known in advance. This command line is working as expected: ffmpeg -i input.mp4

Re: [FFmpeg-user] Subtitles disappear

Am 04.01.2021 um 03:20 schrieb Mark Filipak (ffmpeg): On 01/03/2021 08:00 PM, Cecil Westerhof via ffmpeg-user wrote: I convert a video with the following statement ffmpeg -y -i input.mkv -nostdin -vf scale=1024:-2 -crf 23 -acodec libmp3lame -qscale:a 9 -preset veryfast Temp/output.mp4 Th

Re: [FFmpeg-user] HW Acceleration 101? 2-Up Streaming from RTSP-->ffmpeg-->YouTube

Am 18.01.2021 um 19:18 schrieb Steven Kan: But now I want to do a “2-Up” live stream of two different cameras, side-by-side. Here’s an archive from last night (waiting for a mating pair of Barn Owls to move in): https://www.youtube.com/watch?v=GDN2MjPwn0Q&feature=youtu.be

Re: [FFmpeg-user] colorchannelmixer: perceptual gamma

Am 23.01.2021 um 18:24 schrieb Simon Taylor: Question: Is there a way to make ffmpeg's colorchannelmixer use perceptual gamma? Background: I'm trying to salvage source H.264 video from a capture device (8mm film scanner) which seems to have an extreme saturation issue that often leaves the red a

Re: [FFmpeg-user] (no subject)

Am 26.01.2021 um 01:09 schrieb owen s: I am running this command ffmpeg-git -y \ -vaapi_device /dev/dri/renderD128 \ -framerate 60 -i ./image.jpg \ -stream_loop -1 -i ./audio.mp3 \ -map 0:v \ -c:v h264_vaapi \ -vf 'crop=2560:1440:0:0,format=nv12|vaapi,hwupload,loop=loop=-1:size=1:start=0,hwdownl

Re: [FFmpeg-user] VOICE POST PRODUCTION IN ONE LINE

Am 28.01.2021 um 09:44 schrieb Marco Mircoli: Goodmorning everyone. I'm new to ffmpeg and was wondering if anyone from the group could help me set up a command line. My goal is to improve voice audio recordings. I would like to be able to do this starting from a command line I have in my script,

Re: [FFmpeg-user] "instead of complaining, submit a patch" [was: Re: minterpolate problem]

Am 02.02.2021 um 19:54 schrieb Mark Filipak (ffmpeg): Is there a middle way? Is the choice really, 1, an automated system, or 2, chaos? How about a single person who receives all documentation submittals and fits them into a documentation structure? An editor. That's how the non-coder world

Re: [FFmpeg-user] "instead of complaining, submit a patch" [was: Re: minterpolate problem]

Am 02.02.2021 um 22:05 schrieb Mark Filipak (ffmpeg): On 02/02/2021 03:29 PM, Michael Koch wrote: -snip- In my opinion, it would be best to have all documentation in a wiki. A wiki? Available to all to modify? Available to all who are registered to the wiki. Why not? The wiki has a history

Re: [FFmpeg-user] Insert black frames -- How?

Mark, I want to insert black frames into a stream on a regular basis. #1, Is that an input device? I think so. Or, #2, is it better/easier to repeat an input frame and blacken the repeated frame? Maybe. I seek guidance. I've read everything I could find. Methinks #1 would be best. But if #2,

Re: [FFmpeg-user] alternating checkerboard

Am 09.02.2021 um 04:49 schrieb Mark Filipak (ffmpeg): I don't know the details of the filters that work on pixels ('blend', for example). I hope a knowledgeable person will respond with suggestions. I'd like to experiment with a filter that mixes pixels from 2 progressive streams on an altern

[FFmpeg-user] exposure filter

Hello, in the new "exposure" filter it's unclear in which order the operations are applied. First exposure, then black level? Or first black level, then exposure? Does the filter have a limiter if the result is out of range? These infos should be added to the documentation. Michael _

Re: [FFmpeg-user] exposure filter

Am 10.02.2021 um 20:20 schrieb Paul B Mahol: On Wed, Feb 10, 2021 at 8:14 PM Michael Koch wrote: Hello, in the new "exposure" filter it's unclear in which order the operations are applied. First exposure, then black level? Or first black level, then exposure? Does the filter

Re: [FFmpeg-user] exposure filter

Am 10.02.2021 um 23:17 schrieb Paul B Mahol: Why you do not start fixing your pdf file, it have many obsolete and even false statements. What's wrong and how can it be improved? Michael ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffm

Re: [FFmpeg-user] exposure filter

Am 10.02.2021 um 23:28 schrieb Paul B Mahol: On Wed, Feb 10, 2021 at 11:17 PM Paul B Mahol wrote: Why you do not start fixing your pdf file, it have many obsolete and even false statements. Also to add to that, you already have limiter filter if you need to limit something, no point in doing

Re: [FFmpeg-user] exposure filter

Am 11.02.2021 um 00:43 schrieb Paul B Mahol: On Wed, Feb 10, 2021 at 11:51 PM Michael Koch wrote: Am 10.02.2021 um 23:17 schrieb Paul B Mahol: Why you do not start fixing your pdf file, it have many obsolete and even false statements. What's wrong and how can it be improved? A

Re: [FFmpeg-user] exposure filter

Am 11.02.2021 um 00:50 schrieb Paul B Mahol: On Thu, Feb 11, 2021 at 12:43 AM Paul B Mahol wrote: On Wed, Feb 10, 2021 at 11:51 PM Michael Koch wrote: Am 10.02.2021 um 23:17 schrieb Paul B Mahol: Why you do not start fixing your pdf file, it have many obsolete and even false statements

Re: [FFmpeg-user] astats to csv file

Am 11.02.2021 um 15:48 schrieb Benjamin Houtman: How would that translate into a csv file? The example in chapter 2.113 of my book might help. It's for another filter, but also with *.csv output. http://www.astro-electronic.de/FFmpeg_Book.pdf Michael

Re: [FFmpeg-user] Filter documentation -- PTSs

Jim, I am in the camp that believes that the measure of adequate FFmpeg documentation is that it describes what an FFmpeg user needs to know about the behaviour of that filter, in all respects, without having to read the source code. By that measure, I believe that FFmpeg's documentation for

Re: [FFmpeg-user] converting raw stills to "raw" video

Am 16.02.2021 um 11:52 schrieb shawny: I am trying to find out if it is possible using ffmpeg to convert raw stills into "raw" or log video in order to be gradable as video. This is to incorporate timelapse photography into my video projects. I know this can be done using Adobe After Effects bu

Re: [FFmpeg-user] converting raw stills to "raw" video

Am 16.02.2021 um 21:34 schrieb Paul B Mahol: On Tue, Feb 16, 2021 at 9:28 PM Michael Koch wrote: Am 16.02.2021 um 11:52 schrieb shawny: I am trying to find out if it is possible using ffmpeg to convert raw stills into "raw" or log video in order to be gradable as video.

Re: [FFmpeg-user] converting raw stills to "raw" video

Am 16.02.2021 um 23:52 schrieb Paul B Mahol: On Tue, Feb 16, 2021 at 11:47 PM Michael Koch wrote: Am 16.02.2021 um 21:34 schrieb Paul B Mahol: On Tue, Feb 16, 2021 at 9:28 PM Michael Koch < astroelectro...@t-online.de> wrote: Am 16.02.2021 um 11:52 schrieb shawny: I am trying t

[FFmpeg-user] set metadata in a jpg image

Hello, I want to set two exif tags in a *.jpg image, so that this image is recognized by Facebook as a spherical 360 image. This can be done with exiftool: exiftool -overwrite_original -make="Ricoh" -model="Ricoh THETA S" test.jpg Is it also possible to do the same thing with FFmpeg? This wo

Re: [FFmpeg-user] set metadata in a jpg image

Am 23.02.2021 um 12:04 schrieb Paul B Mahol: On Tue, Feb 23, 2021 at 10:59 AM Michael Koch wrote: Hello, I want to set two exif tags in a *.jpg image, so that this image is recognized by Facebook as a spherical 360 image. This can be done with exiftool: exiftool -overwrite_original -make

Re: [FFmpeg-user] HTML source

Am 25.02.2021 um 11:19 schrieb adam smith via ffmpeg-user: hi gang hope you are all good today. I would like to record a single html page for a fixed duration as if it was a video source. I know I could use OBS to show the web page as an input on a scene and then record it, but I wondered if I

Re: [FFmpeg-user] repeat a frame

Am 03.03.2021 um 23:57 schrieb Mark Filipak (ffmpeg): I've tried transcoding a 2:21:19 movie via this script: SET prep23=settb=expr=1/72,setpts=N*30030 SET cfr23=setpts=N*1001/24000/TB,fps=24000/1001 SET codecs=-codec:v libx265 -x265-params crf=16:qcomp=1.00 -codec:a copy -codec:s copy -dn

Re: [FFmpeg-user] hstack with one video offset in time?

Am 05.03.2021 um 20:33 schrieb Steven Kan: I’d like to assemble these videos, side-by-side, but synced in time, which means the TrailDown video needs to start 50 seconds after the TrailUp video. The TrailDown side can be black/blank, or it can be stuck on the first frame of its video while the ri

Re: [FFmpeg-user] How to get he total number of frames

Am 09.03.2021 um 09:46 schrieb Ulf Zibis: Am 09.03.21 um 09:26 schrieb Peter White: On Tue, Mar 09, 2021 at 09:13:14AM +0100, Ulf Zibis wrote: Hi,, can one please tell me, how I can get the total number of frames of a video? ffmpeg -i input -an -sn -c copy -f null - This basically copies a

Re: [FFmpeg-user] FFmpeg list footer

Am 09.03.2021 um 12:05 schrieb Reindl Harald: look at that bunch of idiots which repleatly ignore the "don't top post" and how do you imagine would a list-footer with the sentence change that That's because many people don't know what the term "top-posting" means. I think it's a good idea t

Re: [FFmpeg-user] FFmpeg list footer

Am 09.03.2021 um 12:36 schrieb Nicolas George: mX (12021-03-09): Can someone with list admin access (admins at foot of this email) please update the footer for this mailing list to assist new posters - because few people read the list FAQ and the devs and regulars spend too much time reminding p

[FFmpeg-user] slideshow with crossfade

I just figured out how to make a slideshow with crossfade. It's a two step process. The first step reads the pictures with framerate 0.5 (which means 2 seconds for each picture), and produces an intermediate video with framerate 2. That means each picture is repeated 4 times. The second step ap

Re: [FFmpeg-user] slideshow with crossfade

/ffmpeg -framerate 0.5 -i IMG_%3d.jpg -r 2 -codec:v mpeg4 temp.mp4 />>/ffmpeg -i temp.mp4 -vf "framerate=fps=25" -codec:v mpeg4 out.mp4 / You should be able to combine the command lines using the fps filter. I did already try that, but unfortunately it doesn't work. I did try this command lin

Re: [FFmpeg-user] slideshow with crossfade

> Complete, uncut console output for the working and the failing case missing. This is the console output for the working case (first zoompan filter, then framerate filter): F:\xxx\Test_Crossfade>c:/ffmpeg/ffmpeg -i IMG_%3d.jpg -vf zoompan=d= 4:s=5472x3648:fps=2,framerate=25 -c:v mpeg4 -q:v

Re: [FFmpeg-user] slideshow with crossfade

Let me explain again what I want to do. I have 5 pictures: 1, 2, 3, 4, 5 I want to read these pictures with framerate 0.5 and then convert the framerate to 2, so that each picture is repeated 4 times: 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5 As the last step I want to make the

[FFmpeg-user] Overlay fails in the middle of the video

Hi all, I'm trying to make a timelapse video from 145 images, which must first be cropped to quadratic size and then a circular mask must be overlaid. The overlay comes from a PNG image (black border with transparent circle). The video looks good in the first 4 or 5 seconds, but then the over

Re: [FFmpeg-user] Overlay fails in the middle of the video

I would guess that at this point (which corresponds to your 4..5 seconds), something is different about the JPEG images. You are totally right. I just found out that it's only one image that produces the problem. This is one of the good images. It's a HDR image from a Canon 6D: http://www.astr

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