Re: [FFmpeg-user] Replace part of the audio

On 1/19/23, Michael Koch wrote: > Am 19.01.2023 um 15:49 schrieb Alexander Bieliaev via ffmpeg-user: >> How can I replace a part of the audio from and to a specific time with >> some >> other audio/sound (I want to replace it with beep in this case)? >> > > Here is an example: > > ffmpeg -lavfi

Re: [FFmpeg-user] aresample filter not resampling?

On Thu, Jan 5, 2023 at 7:04 PM Jayson Larose wrote: > How is the `aresample` filter supposed to work? I'm recording video > from a v4l2 capture device, audio from jack, like such: > > ffmpeg -vsync cfr -timestamps mono2abs -copyts -framerate 59.73 \ > -f v4l2 -thread_queue_size 2048 -i

Re: [FFmpeg-user] Error initializing filter 'channelsplit' with args 'channel_layout=stereo:channels=FL|FR'

On Wed, Jan 4, 2023 at 6:16 PM adam smith wrote: > > > On 4 Jan 2023, at 16:30, Paul B Mahol wrote: > > Correct syntax is FL+FR and not using '|’ > > > Thanks very much Paul, I will give it a whirl. Do you know if I was just > being lucky it worked at all pre

Re: [FFmpeg-user] Error initializing filter 'channelsplit' with args 'channel_layout=stereo:channels=FL|FR'

On Wed, Jan 4, 2023 at 5:17 PM adam smith via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > Hi Everyone, > > I have been running this command no problem using FFmpeg 5.0; but after > updating to 5.1.2 it is complaining about the arguments used in the channel > split. > Error initializing filter

Re: [FFmpeg-user] Decode 360 reality audio (mpeg-h 3d) to ADM BWF format

On Wed, Jan 4, 2023 at 3:18 PM Joy Jin wrote: > Hello, > > Cavern is a tool that I can use to > decode eac3 to ADM BWF. Is there a tool that I can use to decode Sony’s 360 > reality audio format (mpeg-h 3d) to ADM BWF? (Reason being, gain is set too > high so

Re: [FFmpeg-user] Can v360 use cuda or GPU

On Sun, Jan 1, 2023 at 10:35 PM Fritz Farnel wrote: > I found conflicting info on the web and couldn't understand the source. > > Does v360 utilize GPU (cuda) ? > v360 is cpu only filter. > > > My test with just adding '-hwaccel cuda' to a -filter_complex (hstack and > v360) chain does not

Re: [FFmpeg-user] Resizing ffplay window with fixed aspect ratio

On 12/22/22, Carl Zwanzig wrote: > > While ffmpeg is quite useful, there are better free players than ffplay* > (often built on the ffmpeg libs). And for some purposes, there are better > open-source info tools than ffprobe. That is doubtful, citation needed. You are still trying to be truth

Re: [FFmpeg-user] Changing scan type (progressive<->interlaced) without reencoding.

On Tue, Dec 6, 2022 at 10:56 AM Nicolas Gaullier wrote: > >As the title says, is this at all possible? My concern is mostly with > mpeg2 and h264 that have content of one type but encoded/marked as another. > In a general manner, amongst other things, interlaced encoding involves > interlaced

Re: [FFmpeg-user] datascope 16-bit

On 11/19/22, Paul B Mahol wrote: > On 11/19/22, Michael Koch wrote: >> Am 03.11.2022 um 10:10 schrieb Paul B Mahol: >>> >>> Some things in sea of myriad others: >>> [...] >>> Why you claim that datascope does not support >8 bit formats where in

Re: [FFmpeg-user] datascope 16-bit

On 11/19/22, Michael Koch wrote: > Am 03.11.2022 um 10:10 schrieb Paul B Mahol: >> >> Some things in sea of myriad others: >> [...] >> Why you claim that datascope does not support >8 bit formats where in >> fact it does support it? > > In s

Re: [FFmpeg-user] Loudnorm filter in ffmpeg increases and decreases the volume of parts of the audio.

On 11/15/22, CMG DiGiTaL wrote: > Hi Paul, > But it's not me who defines which mode will be used, but Loudnorm... how > can I do that then? > > Using dynamic mode and not linear is far from working correctly. >> >> One use dynamic mode when not specifying measured values to filter. >> > > Hi

Re: [FFmpeg-user] ffserver

On 11/10/22, Dave Blanchard wrote: > > > Date: Wed, 9 Nov 2022 10:16:03 -0500 > From: Clay > To: FFmpeg user questions , Nicolas George > > Subject: Re: [FFmpeg-user] ffserver > > Nicolas George wrote on 11/9/22 03:18: > >> I hope you do not expect getting help with that kind of attitude. > >

Re: [FFmpeg-user] volume normalization: loudnorm versus replaygain; which is better?

On 8/2/22, James Ralston wrote: > When I record videos with my phone (a Google Pixel 6), the audio track > of those videos tends to be too quiet, especially if I recorded in a > quiet environment. I want to normalize the volume of those videos > when I play them. > > I see basically two ways to

Re: [FFmpeg-user] Loudnorm filter in ffmpeg increases and decreases the volume of parts of the audio.

On 10/10/22, CMG DiGiTaL wrote: > I searched the internet before and couldn't find any comments about this > situation: > > In some songs, the loudnorm filter quickly increases the volume of part of > the audio and returns to normal in milliseconds. > > Has anyone been in this situation or know

Re: [FFmpeg-user] Different FrameMD5 when converting between loss-less encodings

On 11/7/22, Tobias Rapp wrote: > On 07/11/2022 10:56, Paul B Mahol wrote: >> On 11/7/22, Tobias Rapp wrote: >>> Hi, >>> >>> recently when testing I stumbled over the situation that a specific >>> 10-bit YUV input file was encoded separately us

Re: [FFmpeg-user] Different FrameMD5 when converting between loss-less encodings

On 11/7/22, Tobias Rapp wrote: > Hi, > > recently when testing I stumbled over the situation that a specific > 10-bit YUV input file was encoded separately using two different > loss-less encoders V210 and FFV1. When comparing the FrameMD5 checksum > of both output files most of the checksums did

Re: [FFmpeg-user] V360 stabilization

On 11/3/22, Michael Koch wrote: > Am 03.11.2022 um 09:35 schrieb Paul B Mahol: >> On 10/11/20, Michael Koch wrote: >>> Am 29.09.2020 um 22:54 schrieb Michael Koch: >>>> Hello all, >>>> >>>> I've programmed a C# workaround for stabiliz

Re: [FFmpeg-user] V360 stabilization

On 10/11/20, Michael Koch wrote: > Am 29.09.2020 um 22:54 schrieb Michael Koch: >> Hello all, >> >> I've programmed a C# workaround for stabilization of 360° videos. The >> procedure is as follows: >> >> 1. FFmpeg: From each frame of the equirectangular input video, extract >> two small images

Re: [FFmpeg-user] lavfi-preview

On 10/31/22, Diederick C. Niehorster wrote: > Hi Paul, > > On Mon, Oct 31, 2022 at 10:35 AM Paul B Mahol wrote: >> >> On 4/24/22, Bang He wrote: >> > hwo to run it >> > >> >> There are now binaries auto build for Windows and Li

Re: [FFmpeg-user] lavfi-preview

On 4/24/22, Bang He wrote: > hwo to run it > There are now binaries auto build for Windows and Linux and are ready for download. All for 64bit. > On Wed, Mar 30, 2022 at 7:53 PM Paul B Mahol wrote: > >> Hello, >> >> I would like to inform you about the new t

Re: [FFmpeg-user] Error in aeval?

On 10/29/22, Michael Koch wrote: > This command line works as expected: > > ffmpeg -f lavfi -i sine,aeval="val(0)|val(0)*sin(2)*sin(2)" -ac 2 -t 5 > -y out.wav > > > Why does it no longer work when I replace sin(2)*sin(2) by pow(sin(2),2) ? > > ffmpeg -f lavfi -i

Re: [FFmpeg-user] “Brick wall” high pass filter

On 10/27/22, Benjamin Houtman wrote: > Hi all, > I’m attempting to create a high pass filter that removes all frequencies > below 50 Hz. I’ve tried acutsub, acrossover, and highpass, but they all > seem to attenuate rather than remove those tones entirely. I need to do > these in batch on

Re: [FFmpeg-user] encode to RAW video

On 10/25/22, Michael Koch wrote: > Am 25.10.2022 um 09:29 schrieb Naveen.B: >>> >>> What do you want to do with the RAW video? You know that you can't play >>> it with most players? >>> >>> Yes, I know it cannot be played with most of th players, I need to see >>> the >>> size of the RAW video

Re: [FFmpeg-user] encode to RAW video

On 10/25/22, Michael Koch wrote: > Am 25.10.2022 um 09:29 schrieb Naveen.B: >>> >>> What do you want to do with the RAW video? You know that you can't play >>> it with most players? >>> >>> Yes, I know it cannot be played with most of th players, I need to see >>> the >>> size of the RAW video

Re: [FFmpeg-user] ffmpeg problem: Wrong or missing size information for certain EXRs

On 9/20/22, Kevin Steele wrote: > Hi! I am trying to convert EXRs to a quicktime video. It has worked several > times for me in the past. However, sometimes it doesn't work mysteriously > on certain exrs and I am not clear why. > Below is a google drive link to the exr file as an example; I

Re: [FFmpeg-user] Size of 10-bit 4:2:2 video streams?

On 9/21/22, Olivier Bruchez via ffmpeg-user wrote: > Hi Marc, > > Thanks for your answer. > >>> /So I made some further tests and discovered that my original AVI >>> file is />/simply corrupted. It's supposed to have 88 minutes of >>> video, but it fails />/after 38 minutes. / >> What does

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/16/22, Dan wrote: >> showinfo filter shows video frame color metadata to output of console, >> nothing less - nothing more. showinfo cant produce incorrect video, if >> you ever bothered to read documentation you would know. > > By the way, just to clarify, I wasn't talking about the console

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/15/22, Michael Koch wrote: > Am 15.09.2022 um 13:43 schrieb Dan: >> On Thu, 15 Sep 2022 12:07:08 +0100, Michael Koch >> wrote: >> >>> Am 15.09.2022 um 11:53 schrieb Dan: > This seems to work with VLC player: > > ffmpeg -f lavfi -i color=0x19be0f:s=400x576 -colorspace bt709 -crf

Re: [FFmpeg-user] Size of 10-bit 4:2:2 video streams?

On 9/15/22, Bruchez Olivier via ffmpeg-user wrote: > Hi all, > > I have a 10-bit 4:2:2 (yuv422p10le) AVI file containing only a video > stream: > > Input #0, avi, from 'test.avi': > Duration: 01:28:00.80, start: 0.00, bitrate: 221185 kb/s > Stream #0:0: Video: v210 (v210 / 0x30313276),

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/15/22, Michael Koch wrote: > Am 15.09.2022 um 11:26 schrieb Dan: >>> You are right that datascope shows no difference. But the issue is also >>> reproducible with VLC player. >> >> As well as VLC Player and FFplay, I've tried MediaPlayerClassic, >> Google Chrome, >> Microsoft Edge and Vegas

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/15/22, Dan wrote: >> You are right that datascope shows no difference. But the issue is also >> reproducible with VLC player. > > As well as VLC Player and FFplay, I've tried MediaPlayerClassic, Google > Chrome, > Microsoft Edge and Vegas Pro, and the problem occurs with each of those. >

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/15/22, Michael Koch wrote: > Am 15.09.2022 um 00:30 schrieb Paul B Mahol: >> On 9/15/22, Dan wrote: >>>> zscale=...,format=yuv420p >>> O okay. I tried that before (except using two -vf commands), >>> because >>> I >>> suspe

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/15/22, Dan wrote: >> zscale=...,format=yuv420p > > O okay. I tried that before (except using two -vf commands), because > I > suspected you might've meant that. > > Just tried it again, still no luck. Let me know if I need to tweak > anything: > > ffmpeg.exe -f lavfi -i

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/14/22, Dan wrote: >>> Unless I'm somehow misusing zscale (which is a possibility), it would >>> seem >>> as if the >>> problem lies elsewhere. >> >> If you do not use format filter after zscale it will not work correctly. > > Do you mean using the "filter" keyword under the zscale

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/14/22, Paul B Mahol wrote: > On 9/14/22, Dan wrote: >> On Wed, 14 Sep 2022 21:26:59 +0100, Carl Zwanzig wrote: >> >>> On 9/14/2022 8:01 AM, Paul B Mahol wrote: >>>> The reason of scale behavior is known and legacy. >>> >>> Is it do

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/14/22, Dan wrote: > On Wed, 14 Sep 2022 21:26:59 +0100, Carl Zwanzig wrote: > >> On 9/14/2022 8:01 AM, Paul B Mahol wrote: >>> The reason of scale behavior is known and legacy. >> >> Is it documented with the filter? I don't see anything obvious about it &

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/14/22, Michael Koch wrote: > Am 14.09.2022 um 11:21 schrieb Dan: >> Using the latest 5.1.1 "essentials build" by www.gyan.dev. >> >> Hi all, I'm a beginner to ffmpeg so I'm having a hard time believing >> that a utility so old and so widely used has such a fundamental bug, >> but the

Re: [FFmpeg-user] ffmpeg MP4/x264 output colours change when input source is different resolution (bug?)

On 9/14/22, Dan wrote: > Using the latest 5.1.1 "essentials build" by www.gyan.dev. > > Hi all, I'm a beginner to ffmpeg so I'm having a hard time believing that a > utility so old and so widely used has such a fundamental bug, but the > evidence is staring me in the face and leads me to no other

Re: [FFmpeg-user] Combining xfade and drawtext

On 9/12/22, Cecil Westerhof via ffmpeg-user wrote: > 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

Re: [FFmpeg-user] Combining xfade and drawtext

On 9/12/22, Cecil Westerhof via ffmpeg-user wrote: > 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 libx264 -crf 26

Re: [FFmpeg-user] -threads 1 seems not work

On 9/12/22, Cecil Westerhof via ffmpeg-user wrote: > 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: >&g

Re: [FFmpeg-user] -threads 1 seems not work

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 ffmpeg >>> should then only use one CPU. I see that t

Re: [FFmpeg-user] -threads 1 seems not work

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 to 180%. So clearly it is using > at least two CPU's. > Or am I

Re: [FFmpeg-user] What am I doing wrong with xfade

On 9/10/22, Cecil Westerhof via ffmpeg-user wrote: > 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.

Re: [FFmpeg-user] What am I doing wrong with xfade

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 to 5-6, … > Then 1-2 and 3-4 to 1-4, 5-6 and 7-8

Re: [FFmpeg-user] [Libav-user] Need Help to understand usages of Libavformat.

On 9/8/22, Rishabh Shak Dwipeey wrote: > Hello Team > > Any update on this? > > Regards, > Rishabh Shak Dwipeey > > On Mon, Sep 5, 2022 at 4:39 PM Rishabh Shak Dwipeey < > rishabhshakdwip...@gmail.com> wrote: > >> Hello Team >> >> I need your help to understand and get a clear view on

Re: [FFmpeg-user] Error decoding DTS-HD MA audio files

but I doubt that because decoder follows specification 100% AFAIK. > > > > -Original Message- > From: ffmpeg-user On Behalf Of Paul B > Mahol > Sent: Friday, 26. August 2022 21:57 > To: FFmpeg user questions > Subject: Re: [FFmpeg-user] Error decoding DTS-HD MA audio fi

Re: [FFmpeg-user] Error decoding DTS-HD MA audio files

On Fri, Aug 26, 2022 at 4:12 PM wrote: > Hello > > Am trying to extract DTS-HD MA audio files from the following Blu-Ray > (which > I physically purchased) > > KARL RICHTER - J.S. Bach: Cantatas - Pure Audio Recordings > < >

Re: [FFmpeg-user] Error decoding DTS-HD MA audio files

On Fri, Aug 26, 2022 at 4:12 PM wrote: > Hello > > Am trying to extract DTS-HD MA audio files from the following Blu-Ray > (which > I physically purchased) > > KARL RICHTER - J.S. Bach: Cantatas - Pure Audio Recordings > < >

Re: [FFmpeg-user] multiple flat videos in a equirectangular projection - v360 filter

On Sat, Jul 16, 2022 at 11:22 AM Denis Połeć wrote: > Hello, > I wouldn't call myself a beginner, but I still need a little bit to become > a pro. :) > I have a question that might be easy to answer. > > I am working on a script to bring multiple flat videos into a > equirectangular projection

Re: [FFmpeg-user] Raw video conversion

On Fri, Jul 8, 2022 at 10:44 PM Phil Rhodes via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > > I did NOT, I repeat, NOT write the message below. > > I had that happen last week, in the thread titled "Re: [FFmpeg-user] > asubboost and asupercut" > Perhaps you use too much clones. > > On Sun,

Re: [FFmpeg-user] Multiple xfade in one run

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 ffmpeg-user < > >> ffmpeg-user@ffmpeg.or

Re: [FFmpeg-user] Multiple xfade in one run

On Mon, Jul 4, 2022 at 6:46 PM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > 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 w

Re: [FFmpeg-user] Multiple xfade in one run

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 some digging > and found this: > ffmpeg -y \ >

Re: [FFmpeg-user] ffmpeg don't stop working

On Mon, Jul 4, 2022 at 3:47 PM Windstyle - Sistemas via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > I need help with behavior that is incomprehensible to me. Ubuntu 20 > system, compiled ffmpeg by Nvidia's GIT for CUDA support. At the start of > the conversion ffmpeg continues to write output

Re: [FFmpeg-user] asubboost and asupercut

On Sun, Nov 29, 2020 at 6:07 PM Phil Rhodes via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > > > On Sunday, 29 November 2020, 15:55:29 GMT, Michael Koch < > astroelectro...@t-online.de> wrote: > > The name "feedback" is misleading because this signal isn't going back.> > It would make sense

Re: [FFmpeg-user] Need Command

On Fri, Jul 1, 2022 at 7:18 AM Dhwani Shukla wrote: > Hi, > > Logs: > 2022-07-01 10:33:12.216336+0530 Picskitz[5943:54020] Loaded > mobile-ffmpeg-full-gpl-x86_64-4.4-20200725 > 2022-07-01 10:33:12.220093+0530 Picskitz[5943:55881] INFO: ffmpeg version > v4.4-dev-416 > 2022-07-01

Re: [FFmpeg-user] remap with pixel interpolation

On Wed, Jun 29, 2022 at 9:43 AM Paul B Mahol wrote: > > > On Wed, Jun 29, 2022 at 9:18 AM Michael Koch > wrote: > >> Am 29.06.2022 um 09:15 schrieb Paul B Mahol: >> > On Wed, Jun 29, 2022 at 8:56 AM Michael Koch < >> astroelectro...@t-online.de> >>

Re: [FFmpeg-user] Make white of photo transparant

On Wed, Jun 29, 2022 at 2:30 PM Bouke / edit 'B wrote: > Beledig me niet, lijk met niet in lijn met je princiepes / de Heer, iig > siert het niemand. > > Bouke / edit 'B > > Stop top posting and use English. > videotoolshed.com > Van Oldenbarneveltstraat 33 > 6512 AS Nijmegen, the Netherlands

Re: [FFmpeg-user] Make white of photo transparant

On Wed, Jun 29, 2022 at 11:37 AM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > Bouke / Videotoolshed writes: > > > On 29 Jun 2022, at 01:48, Cecil Westerhof via ffmpeg-user < > ffmpeg-user@ffmpeg.org> wrote: > >> > >> > >> The background of the photo is white. Would it be

Re: [FFmpeg-user] Make white of photo transparant

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 background of the photo is white. Would it be possible to make > > that transparent? (So where

Re: [FFmpeg-user] remap with pixel interpolation

On Wed, Jun 29, 2022 at 9:18 AM Michael Koch wrote: > Am 29.06.2022 um 09:15 schrieb Paul B Mahol: > > On Wed, Jun 29, 2022 at 8:56 AM Michael Koch < > astroelectro...@t-online.de> > > wrote: > > > >> Suggestion for improvement: > >> Add pixe

Re: [FFmpeg-user] remap with pixel interpolation

On Wed, Jun 29, 2022 at 8:56 AM Michael Koch wrote: > Suggestion for improvement: > Add pixel interpolation to the remap filter. For example if the output > size is 800x600, multiply the values in the mapping files by 16 so that > the range is 12800x9600, and use the 4 least significant bits for

Re: [FFmpeg-user] Problem with videos not playing in mobile browser

On Tue, Jun 28, 2022 at 3:44 PM Dr Mark A. Garlick wrote: > Dear all > > I am new to this forum. > > I have noticed that some of my videos, encoded with ffmpeg and uploaded > to my websites, do not play on mobile web browsers, but they work > perfectly well on desktop browsers on my Linux

Re: [FFmpeg-user] Forced upmixing scheme with no way to disable

able, my layout > very well may be true to 5.1, but ffmpeg forcing a 128hz filter is not > always desired. I should be able to override that filter but retain a 5.1 > channel layout designation. > > IIUC lowpass is done in encoder. > On Thu, Jun 23, 2022 at 5:22 PM Paul B Mahol

Re: [FFmpeg-user] Forced upmixing scheme with no way to disable

ear to be an AAC problem > Then use join filter instead of amerge and specify 6.0 layout, Good luck. > > On Thu, Jun 23, 2022 at 4:04 PM Paul B Mahol wrote: > > > On Thu, Jun 23, 2022 at 8:43 PM Jeremy F wrote: > > > > > That's what I thought! However, here ar

Re: [FFmpeg-user] Forced upmixing scheme with no way to disable

ts zero based it's labeled 3): > > ffmpeg -i vid1.mp4 -map_channel 0.1.3 ch4.mp3 > > ch4.mp3 will be a 128hz lowpass filtered version of the audio, despite me > never specifying that. > > Stop transcoding to aac. > > On Thu, Jun 23, 2022 at 1:48 PM Paul B Mahol wrote: >

Re: [FFmpeg-user] Forced upmixing scheme with no way to disable

r R channel, but channel > 4 will have a 128hz low pass on it. > That directly contradicts with reality. FFmpeg never applies lowpass to LFE channels, unless you call lowpass filter or similar filter on it. > > On Thu, Jun 23, 2022 at 12:55 PM Paul B Mahol wrote: > > > On Thu, Jun

Re: [FFmpeg-user] Forced upmixing scheme with no way to disable

On Thu, Jun 23, 2022 at 6:45 PM Jeremy F wrote: > Hi I'm probably using ffmpeg in an edge-case way, but I simply want to take > 2 channels/stereo, and end up with 6 channels of audio, where I can > apply/modify/filter each channel as I please. And I figured out the ffmpeg > magic to do this, but

Re: [FFmpeg-user] xfade

On Tue, Jun 21, 2022 at 9:42 AM Michael Koch wrote: > Hi, > > I don't understand the examples in https://trac.ffmpeg.org/wiki/Xfade > > If the first input has length 5s and the offset is 4.5s and the duration > is 1s, then from where comes the first input between t=5s and t=5.5s? > It is error.

Re: [FFmpeg-user] concat audio files

On Sat, Jun 11, 2022 at 12:02 PM Michael Koch wrote: > Am 11.06.2022 um 11:46 schrieb Nicolas George: > > Michael Koch (12022-06-11): > >> I always get this error message: > >> Stream specifier '' in filtergraph description [0][1]concat=n=2:a=1 > matches > >> no streams. > > Where did you find

Re: [FFmpeg-user] Please increase the number of variables

On Fri, Jun 3, 2022 at 5:05 PM Michael Koch wrote: > Hello, > > I'd like to ask if the number of variables in expressions could be > increased from 10 to 25 please. I mean the st() and ld() functions. I'm > just programming a realtime wormhole simulation and the limitation to 10 > variables is

Re: [FFmpeg-user] Multiple parts of a video

On Tue, May 31, 2022 at 6:15 PM Bo Berglund wrote: > On Tue, 31 May 2022 13:15:02 +0200, Michael Koch < > astroelectro...@t-online.de> > wrote: > > >Am 31.05.2022 um 11:17 schrieb Bo Berglund: > >> On Sun, 29 May 2022 13:17:55 +0200, Michael Koch < > astroelectro...@t-online.de> > >> wrote: >

Re: [FFmpeg-user] Multiple parts of a video

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 < > ffmpeg-user@ffmpeg.org> wrote: > > > > Paul B Mahol writes: > > > > > On Sat, May 28,

Re: [FFmpeg-user] Multiple parts of a video

On Sat, May 28, 2022 at 9:46 PM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > Paul B Mahol writes: > > > On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user < > ffmpeg-user@ffmpeg.org> wrote: > > > > When I just want to h

Re: [FFmpeg-user] Generate numbers when concatenating videos

On Sat, May 28, 2022 at 9:34 PM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > I need to concatenate a series of files. It would be nice when every > part would be preceded with its number. > For example: > - A white one on a black background. > - Then the first video. > -

Re: [FFmpeg-user] Multiple parts of a video

On Sat, May 28, 2022 at 4:28 PM Cecil Westerhof via ffmpeg-user < ffmpeg-user@ffmpeg.org> 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 \ >-to 00:17 \ >

Re: [FFmpeg-user] force to decode with the special audio encoding

On Sat, May 28, 2022 at 3:03 AM Bang He wrote: > have a file which contains hevc and g711. when i run ffplay, it doesn't > recognize the g711 encoding. can i force ffplay to decode with g711 audio > coder? > Please share file. > ___ > ffmpeg-user

Re: [FFmpeg-user] avsynctest

On Thu, May 12, 2022 at 2:37 PM Bang He wrote: > hi all > it seems avsynctest filter is helpful on my job. can you demo some command > line? > ffplay -f lavfi -i avsynctest[out1] > thanks. > > On Tue, Apr 19, 2022 at 5:10 PM Michael Koch > wrote: > > > Hello, > > > > it's unclear how the new

Re: [FFmpeg-user] How do I accelerate fisheye to hequirect conversion with cuda?

On Tue, May 10, 2022 at 9:54 AM Alexander Winnig via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > This is my command > > ffmpeg -y -i in.mp4 -vf > v360=input=sg:ih_fov=118.2:iv_fov=69.5:output=hequirect:w=2924:h=2924 > -b:v 102400k -bufsize 5000k -c:a copy out.mp4 > > I tried| > | > > The

Re: [FFmpeg-user] vf_lut3d supports type 3 ?

n, May 9, 2022 at 1:15 AM Paul B Mahol wrote: > > > On Sun, May 8, 2022 at 9:28 PM Mahesh Pittala < > mah...@multicorewareinc.com > > > > > wrote: > > > > > Hello, > > > > > > I am trying to convert HLG to SDR using 3D LUT cubes freely

Re: [FFmpeg-user] vf_lut3d supports type 3 ?

On Sun, May 8, 2022 at 9:28 PM Mahesh Pittala wrote: > Hello, > > I am trying to convert HLG to SDR using 3D LUT cubes freely distributed by > NBCUniversal. (3-NBCU_HLG2SDR_DL_v1.1.cube > < >

Re: [FFmpeg-user] problem with fast seeking and splitting

On Mon, May 2, 2022 at 9:54 AM Alexander Solonsky < alexander.solon...@castlabs.com> wrote: > Monday, May 2, 2022, 2:21:17 PM, you wrote: > > > > > On Mon, May 2, 2022 at 7:27 AM Alexander Solonsky via ffmpeg-user < > ffmpeg-user@ffmpeg.org> wrote: > >> Dear Experts, >> >> I'm trying to split an

Re: [FFmpeg-user] problem with fast seeking and splitting

On Mon, May 2, 2022 at 7:27 AM Alexander Solonsky via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > Dear Experts, > > I'm trying to split an input file into 2 second chunks, transcode and > assemble using a concat muxer. And experiencing two problems: > major one: > 1) when using ffmpeg -ss

Re: [FFmpeg-user] Single-field deinterlace with nnedi

On 4/30/22, Alexander Zhang wrote: >>> I'm trying to use nnedi to deinterlace a 29.97 fps video without >>> doubling the frame rate. I added the fields=a option which I thought was >>> supposed to make nnedi only use one of the two fields, but the output is >>> still 59.94 fps. Is this a bug or

Re: [FFmpeg-user] Single-field deinterlace with nnedi

On Sat, Apr 30, 2022 at 8:51 AM Alexander Zhang wrote: > Hello, > > I'm trying to use nnedi to deinterlace a 29.97 fps video without > doubling the frame rate. I added the fields=a option which I thought was > supposed to make nnedi only use one of the two fields, but the output is > still 59.94

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

On Tue, Apr 19, 2022 at 8:41 PM 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

Re: [FFmpeg-user] Colorchart and colormap

On Tue, Apr 26, 2022 at 6:48 PM Michael Koch wrote: > I wrote a few examples for the workflow with "colorchart" source and > "colormap" filter. > This is a nice feature for making color corrections. > See chapters 2.31 and 2.32 in > http://www.astro-electronic.de/FFmpeg_Book.pdf Also there is

Re: [FFmpeg-user] Colorchart and colormap

On Tue, Apr 26, 2022 at 8:39 AM Michael Koch wrote: > Am 25.04.2022 um 22:19 schrieb Paul B Mahol: > > On Mon, Apr 25, 2022 at 10:06 PM Carl Zwanzig wrote: > > > >> On 4/25/2022 12:49 PM, Michael Koch wrote: > >> > >>> Am 25.04.2022 um 21:41 s

Re: [FFmpeg-user] Colorchart and colormap

On Mon, Apr 25, 2022 at 10:06 PM Carl Zwanzig wrote: > On 4/25/2022 12:49 PM, Michael Koch wrote: > > > Am 25.04.2022 um 21:41 schrieb Paul B Mahol: > >> There is separate software for processing real world colorcharts. > > > If colormap isn't for processing of rea

Re: [FFmpeg-user] Colorchart and colormap

On Mon, Apr 25, 2022 at 9:16 PM Michael Koch wrote: > Hi, > > I have some remarks and questions about the new "colorchart" source and > "colormap" filter. > > In "colorchart" is a small error in the yellow field. It should be 231, > 199, 31. > Source: >

Re: [FFmpeg-user] showvolume filter memory leak

rk either. > > > > Is there any other way to send a raw video output to vlc? > > > > Thank you, > > > > On Tue, Apr 19, 2022 at 7:00 PM Paul B Mahol wrote: > > > > > On Tue, Apr 19, 2022 at 12:15 PM ramon wrote: > > > > > > > OK

Re: [FFmpeg-user] Average a "rolling" N frames?

On Thu, Apr 21, 2022 at 7:03 AM Steven Kan wrote: > I’m putting together a time-lapse video of bees building comb in the hive. > I have 5,000+ jpgs (and growing!) in a directory that I process with: > > ffmpeg -hwaccel videotoolbox -framerate 60 -pattern_type glob -i '*.jpg' > -c:v

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

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

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] avsynctest

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

al. > > > On Mon, Apr 18, 2022 at 8:27 PM Paul B Mahol wrote: > > > On Mon, Apr 18, 2022 at 8:13 PM Paul B Mahol wrote: > > > > > > > > > > > On Mon, Apr 18, 2022 at 7:00 PM ramon wrote: > > > > > >> Yes, I used the

Re: [FFmpeg-user] avsynctest

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

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

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] showvolume filter memory leak

On Mon, Apr 18, 2022 at 8:13 PM Paul B Mahol wrote: > > > On Mon, Apr 18, 2022 at 7:00 PM ramon wrote: > >> Yes, I used the master versión with your 24144af2 patch. >> Your patch corectec the leak if dm (draw_persistent_duration) > 0, and >> the >

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