Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Michael Koch
Am 19.04.2022 um 23:06 schrieb Roger: On Tue, Apr 19, 2022 at 08:25:17PM +0200, Michael Koch wrote: Am 19.04.2022 um 03:34 schrieb Roger: I'm not finding much about fixing video having incorrect white space, more specifically video with incorrect or forgotten fluorescent white balance setting

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Carl Zwanzig
On 4/19/2022 2:06 PM, Roger wrote: 5500 Kelvin - 6500 Kelvin - 0.21 CTO.cube 6500 Kelvin - 2800 Kelvin - 1.56 CTB.cube 6500 Kelvin - 5500 Kelvin - 0.21 CTB.cube Yea, horrendously named file names! Not bad, actually :) Harkens back to photography and motion pictures- Color Temperature Blue

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Roger
> On Tue, Apr 19, 2022 at 06:32:39PM +, Carl Zwanzig wrote: >On 4/19/2022 11:07 AM, Roger wrote: >> I noticed the colorcorrect filter, for use with augmenting the Red and Blue >> channels. > >Touching on that- in most video systems green is the fixed* level and R/B are >adjusted to that. Makes

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Roger
> On Tue, Apr 19, 2022 at 08:25:17PM +0200, Michael Koch wrote: >Am 19.04.2022 um 03:34 schrieb Roger: >> I'm not finding much about fixing video having incorrect white space, more >> specifically video with incorrect or forgotten fluorescent white balance >> setting during recording. ... >> >>

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Carl Zwanzig
On 4/19/2022 12:08 PM, Bouke / edit 'B wrote: Could be I’m missing the point, but cutting / extending two legs of a three legged chair will close to NEVER make the desired height.Agreed, but... But yes, it will level it if needed, to stick to the reference. And that's the point of

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Bouke / edit 'B
On 19 Apr 2022, at 20:44, Jim DeLaHunt wrote: > > Not that the FFmpeg tool is stupid overall — it is quite capable and useful > in many ways. But there are aspects of the tool, and its documentation, and > its contributors' behaviour, and the project culture, which are indeed quite > stupid.

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Bouke / edit 'B
> On 19 Apr 2022, at 21:00, Carl Zwanzig wrote: > > On 4/19/2022 11:52 AM, Bouke / edit 'B wrote: >>> How would you do that when there are only parameters for R and B? > >> AFAIK, YUV = R-Y B-Y, so it’s just math. >> Doing corrections in RGB is simpler for a mortal, > > and in analog :) > >

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Carl Zwanzig
On 4/19/2022 11:52 AM, Bouke / edit 'B wrote: How would you do that when there are only parameters for R and B? AFAIK, YUV = R-Y B-Y, so it’s just math. Doing corrections in RGB is simpler for a mortal, and in analog :) What I'm getting at is there are no green terms on that filter's

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Bouke / edit 'B
> On 19 Apr 2022, at 20:41, Carl Zwanzig wrote: > > On 4/19/2022 11:37 AM, Paul B Mahol wrote: >> colorcorrect filter operates in YUV colorspace and not RGB colorspace >> So green tint can be adjusted with it. > > How would you do that when there are only parameters for R and B? > > z!

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Michael Koch
Am 19.04.2022 um 20:44 schrieb Jim DeLaHunt: On 2022-04-19 11:38, Paul B Mahol wrote: On Tue, Apr 19, 2022 at 8:25 PM Michael Koch wrote: I would do that with a color-look-up-table. The procedure is described step-by-step in chapter 2.27 and an easier simplified version is described in

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Jim DeLaHunt
On 2022-04-19 11:38, Paul B Mahol wrote: On Tue, Apr 19, 2022 at 8:25 PM Michael Koch wrote: I would do that with a color-look-up-table. The procedure is described step-by-step in chapter 2.27 and an easier simplified version is described in chapter 2.28 in my book:

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Michael Koch
Am 19.04.2022 um 20:38 schrieb Paul B Mahol: On Tue, Apr 19, 2022 at 8:25 PM Michael Koch wrote: Am 19.04.2022 um 03:34 schrieb Roger: I'm not finding much about fixing video having incorrect white space, more specifically video with incorrect or forgotten fluorescent white balance setting

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Carl Zwanzig
On 4/19/2022 11:37 AM, Paul B Mahol wrote: colorcorrect filter operates in YUV colorspace and not RGB colorspace So green tint can be adjusted with it. How would you do that when there are only parameters for R and B? z! ___ ffmpeg-user mailing list

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Paul B Mahol
On Tue, Apr 19, 2022 at 8:25 PM Michael Koch wrote: > Am 19.04.2022 um 03:34 schrieb Roger: > > I'm not finding much about fixing video having incorrect white space, > more > > specifically video with incorrect or forgotten fluorescent white balance > > setting during recording. > > > > I have a

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Paul B Mahol
On Tue, Apr 19, 2022 at 8:32 PM Carl Zwanzig wrote: > On 4/19/2022 11:07 AM, Roger wrote: > > I noticed the colorcorrect filter, for use with augmenting the Red and > Blue > > channels. > > Touching on that- in most video systems green is the fixed* level and R/B > are adjusted to that. Makes

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Carl Zwanzig
On 4/19/2022 11:07 AM, Roger wrote: I noticed the colorcorrect filter, for use with augmenting the Red and Blue channels. Touching on that- in most video systems green is the fixed* level and R/B are adjusted to that. Makes sense that ffmpeg does the same. *not separately adjustable z!

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Michael Koch
Am 19.04.2022 um 03:34 schrieb Roger: I'm not finding much about fixing video having incorrect white space, more specifically video with incorrect or forgotten fluorescent white balance setting during recording. I have a very old VHS recorded tape without a fluorescent white balance applied,

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Roger
For those wondering about the fluorescent color settings, for filtering different standard fluorescent lighting scenarios within photography or videos: Color temperature white points Wikipedia https://en.wikipedia.org/wiki/Template:Color_temperature_white_points This includes my video

[FFmpeg-user] Announcing an AppleScript to help Mac users concatenate using ffmpeg

2022-04-19 Thread llee040
This might be of interest for Mac users who want to concatenate media files using ffmpeg. From the blog post: "The AppleScript below is configured to exploit a special relationship between AppleScript and the Mac Finder. Here are two suggested methods for using it to concatenate media files

Re: [FFmpeg-user] avsynctest

2022-04-19 Thread Carl Zwanzig
On 4/19/2022 10:07 AM, Paul B Mahol wrote: Inexperienced users should not use ffmpeg. what in blazes does that mean? Everyone is an "inexperienced user" before they use it and, well, gain experience; that includes _all_ of us. Even then it's probably the worst argument for incomplete

Re: [FFmpeg-user] avsynctest

2022-04-19 Thread Paul B Mahol
On Tue, Apr 19, 2022 at 6:25 PM Jim DeLaHunt wrote: > On 2022-04-19 02:09, Michael Koch wrote: > > Hello, > > > > it's unclear how the new "avsynctest" source is expected to work. The > > most simple command line > > > > ffmpeg -f lavfi -i avsynctest=d=5 out.mov > > > > gives this error message:

Re: [FFmpeg-user] showvolume filter memory leak

2022-04-19 Thread Paul B Mahol
On Tue, Apr 19, 2022 at 12:15 PM ramon wrote: > OK I'll check the pts sync as you say. > > I am simply trying the following command based on > > https://hhsprings.bitbucket.io/docs/programming/examples/ffmpeg/audio_visualization/_showvolume_.html > and I get memory leaks., I don't know the

Re: [FFmpeg-user] avsynctest

2022-04-19 Thread Jim DeLaHunt
On 2022-04-19 02:09, Michael Koch wrote: Hello, it's unclear how the new "avsynctest" source is expected to work. The most simple command line ffmpeg -f lavfi -i avsynctest=d=5 out.mov gives this error message: ...[error message and console log omitted for brevity]... I agree, Michael.

Re: [FFmpeg-user] showvolume filter memory leak

2022-04-19 Thread ramon
OK I'll check the pts sync as you say. I am simply trying the following command based on https://hhsprings.bitbucket.io/docs/programming/examples/ffmpeg/audio_visualization/_showvolume_.html and I get memory leaks., I don't know the reason. ffmpeg -re -stream_loop -1 -i test.mp3

Re: [FFmpeg-user] avsynctest

2022-04-19 Thread Paul B Mahol
On Tue, Apr 19, 2022 at 11:10 AM Michael Koch wrote: > Hello, > > it's unclear how the new "avsynctest" source is expected to work. The > most simple command line > > ffmpeg -f lavfi -i avsynctest=d=5 out.mov > > gives this error message: > > [lavfi @ 02741200efc0] Output pad "video" with

[FFmpeg-user] avsynctest

2022-04-19 Thread Michael Koch
Hello, it's unclear how the new "avsynctest" source is expected to work. The most simple command line ffmpeg -f lavfi -i avsynctest=d=5 out.mov gives this error message: [lavfi @ 02741200efc0] Output pad "video" with type video of the filter instance "Parsed_avsynctest_0" of avsynctest

Re: [FFmpeg-user] Fluorescent White Balance Video Filters

2022-04-19 Thread Paul B Mahol
On Tue, Apr 19, 2022 at 3:34 AM Roger wrote: > I'm not finding much about fixing video having incorrect white space, more > specifically video with incorrect or forgotten fluorescent white balance > setting during recording. > > I have a very old VHS recorded tape without a fluorescent white

Re: [FFmpeg-user] Issues deinterlacing DirectShow input with ffplay

2022-04-19 Thread Roger Pack
On Mon, Apr 11, 2022 at 2:50 PM Alex wrote: > > On Sunday, April 10th, 2022 at 1:18 AM, Roger Pack > wrote: > > Input frame rate is still the same both ways? > > Yes, 29.97 fps either way (didn't realize that it's covered in the video; > the log files should have everything though). Can you

Re: [FFmpeg-user] Change device setting from CLI?

2022-04-19 Thread Roger Pack
On Sun, Apr 10, 2022 at 7:28 AM Steve Russell wrote: > > I bought an HD webcam during the pandemic and it's been pretty good except > the colours were a bit off. I finally decided to try and do something about > it. The app I use most with it (Zoom) doesn't offer any way to tweak the > camera