[FFmpeg-user] Help needed with command

I have a video editor app, so videos can be of any dimension and at any position in the scene. I want to apply a transition between 2 videos which are placed side by side in the timeline with one starting immediately after another but those 2 videos can be of any dimension and at any position with

Re: [FFmpeg-user] Help to understand -ac 6 behaviour encoding ProRes to MP4 EAC3

On Fri, Mar 8, 2024 at 12:48 PM Joanna White wrote: > Good morning, > > Here at the BFI National Archive I have MP4 transcode scripts which handle > many different AV source files, converting them into derivative access > copies, generally mapping two streams of audio to the MP4. Many source > fi

[FFmpeg-user] Help to understand -ac 6 behaviour encoding ProRes to MP4 EAC3

Good morning, Here at the BFI National Archive I have MP4 transcode scripts which handle many different AV source files, converting them into derivative access copies, generally mapping two streams of audio to the MP4. Many source files with 5.1 and higher are failing naturally, as we don't hav

[FFmpeg-user] help using SIGPIPE in ffmpeg

Hi ffmpeg-users, I was using a behavior in ffmpeg where SIGPIPE would terminate ffmpeg (while permitting it to cleanly end its muxing). This can be demonstrated in ffmpeg 5.1.3 with this command of piping ffmpeg into ffplay. When I close the ffplay window, the ffmpeg receives a SIGPIPE and stop

[FFmpeg-user] Help: Audio and video output out of sync when streaming

Hello All, I am exploring a GitHub repository - https://github.com/aws-samples/amazon-chime-meeting-broadcast-demo This is a docker container which when run on EC2, open a URL you provide ( could be any such as VDO.ninja) using Firefox and streams the output to any RTMP you provide using FFMPEG F

[FFmpeg-user] Help with tiled TIFF support

Hi, I'm far from an ffmpeg expert, but have been able to piece together a command that takes a series of TIFF images (actually geotiffs). Recently I updated my software that generates the TIFF images to use internal tiling versus the striped structure it was using before. I've noticed that my

Re: [FFmpeg-user] Help with converting .avi to mp4

Am 13.02.23 um 02:03 schrieb Jeff Parkes: Thanks for your help Karl. instead multiple top-posting "thank you" and "sorry" mails without any content for the sake of god post the full command-line and uncut-input On Sun, 12 Feb 2023, 21:39 Carl Zwanzig, wrote: On 2/12/2023 11:57 AM, Vi

Re: [FFmpeg-user] Help with converting .avi to mp4

Sorry, Carl On Mon, 13 Feb 2023, 01:03 Jeff Parkes, wrote: > Thanks for your help Karl. > > Regards Jeff > > > On Sun, 12 Feb 2023, 21:39 Carl Zwanzig, wrote: > >> On 2/12/2023 11:57 AM, Vincent Deconinck wrote: >> > I mean -i >> > See https://ffmpeg.org/ >> >> -i (input) on the ffmpeg com

Re: [FFmpeg-user] Help with converting .avi to mp4

Thanks for your help Karl. Regards Jeff On Sun, 12 Feb 2023, 21:39 Carl Zwanzig, wrote: > On 2/12/2023 11:57 AM, Vincent Deconinck wrote: > > I mean -i > > See https://ffmpeg.org/ > > -i (input) on the ffmpeg command > -l (long) on the ls command > There is a lot of useful info about how comm

Re: [FFmpeg-user] Help with converting .avi to mp4

On 2/12/2023 11:57 AM, Vincent Deconinck wrote: I mean -i See https://ffmpeg.org/ -i (input) on the ffmpeg command -l (long) on the ls command There is a lot of useful info about how command lines are interpreted in the first couple sections of the ffmpeg doc. Please post more details if y

Re: [FFmpeg-user] Help with converting .avi to mp4

could you confirm you mean " ...-1" and not "...-i" please.. > Oh, I realize you may now hesitate on the syntax of "ls" and not the one of ffmpeg. The option I requested was -l as in "long format". If you copy/paste from my mail, you'll be sure to get it right. Vincent ___

Re: [FFmpeg-user] Help with converting .avi to mp4

Hi Jeff, I'll copy and paste as you requested but could you confirm you > mean " ...-1" and not "...-i" please. > I mean -i See https://ffmpeg.org/ Please post more details if you need more help :-) Vincent ___ ffmpeg-user mailing list ffmpeg-user@ff

Re: [FFmpeg-user] Help with converting .avi to mp4

Am 12.02.23 um 20:37 schrieb Jeff Parkes: Hi Vincent, I'll copy and paste as you requested but could you confirm you mean " ...-1" and not "...-i" please. no, you don't copy&paste as requested On Sun, 12 Feb 2023, 19:06 Vincent Deconinck, wrote: Hi Jeff, struggling with the correct syn

Re: [FFmpeg-user] Help with converting .avi to mp4

Hi Vincent, I'll copy and paste as you requested but could you confirm you mean " ...-1" and not "...-i" please. Regards Jeff On Sun, 12 Feb 2023, 19:06 Vincent Deconinck, wrote: > Hi Jeff, > > struggling with the correct syntax to use for "input_filename". > > > > The simplest syntax for a fil

Re: [FFmpeg-user] Help with converting .avi to mp4

Hi Jeff, struggling with the correct syntax to use for "input_filename". > The simplest syntax for a file conversion is ffmpeg -i > I keep getting the message on my Ubuntu terminal; file as "Input_.avi">. > Could you please copy/paste the exact command you are typing and the full ffmpeg out

[FFmpeg-user] Help with converting .avi to mp4

Hi, I'm new to FFmpeg and am struggling with the correct syntax to use for "input_filename". I'm trying to convert a film in .avi to mp4, which my TV can play. I keep getting the message on my Ubuntu terminal; file as "Input_.avi">. I have changed the name of the file to "Fred.avi" for ease of

Re: [FFmpeg-user] help : VHS, tapes, correct commands and parameters?

On 1/22/2023 3:05 PM, l...@netc.fr wrote: does the 720x576 is right, or better 768x576? PAL format is 720x576. "-standard" appears twice in the command line, why? Also, check on the difference between -r and -framerate; they work differently. Please do not top-post on this mailing list, th

Re: [FFmpeg-user] help : VHS, tapes, correct commands and parameters?

À : ffmpeg-user@ffmpeg.org Sujet : Re: [FFmpeg-user] help : VHS, tapes, correct commands and parameters? Date : 18/01/2023 23:52:57 Europe/Paris On Wed, 18 Jan 2023 20:37:28 +0100 (CET) l...@netc.fr wrote: > Does the second command look right? I think you should use either .mpg or .mkv for

Re: [FFmpeg-user] help : VHS, tapes, correct commands and parameters?

On Wed, 18 Jan 2023 20:37:28 +0100 (CET) l...@netc.fr wrote: > Does the second command look right? I think you should use either .mpg or .mkv format instead for mpeg2 video, but not sure if it would cause this problem. Dave ___ ffmpeg-user mailing lis

[FFmpeg-user] help : VHS, tapes, correct commands and parameters?

hello, I was trying to thought about the old command line I was using few years ago do digitalize (or record) old VHS videotapes, to a common digital file (.avi/mp4) Here is the old one:     ffmpeg -f alsa -i hw:0,1 -f v4l2 -channel 1 -i /dev/video0 -standard 3 -vcodec mpeg1video -b 2500k -ac

[FFmpeg-user] Help for better video contrast.

Hi, With this command I tried to enhance a short video: ffmpeg -i NET\ Villa\ Burgen.mp4 -vf atadenoise,histeq=0.1:0.11:strong -c:a copy -movflags +faststart NET\ Villa\ Burgen_3.mp4 (using ffmpeg version 5.1.2-0ubuntu1~22.04.sav1.1) It helps a lot for the first 2 minutes, but from there in the

Re: [FFmpeg-user] Help: is it possibile to join an image and a live stream?

Am 07.10.2022 um 20:28 schrieb Michael Koch: Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz: i have 2 inputs first input image  -i logo.png second input dshow webcam  -f dshow -i video="my webcam" is it possible to show 5 seconds logo and and subsequently start webcam? it can also be done w

Re: [FFmpeg-user] Help: is it possibile to join an image and a live stream?

Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz: i have 2 inputs first input image -i logo.png second input dshow webcam -f dshow -i video="my webcam" is it possible to show 5 seconds logo and and subsequently start webcam? it can also be done with "streamselect" filter, have a look at the

Re: [FFmpeg-user] Help: is it possibile to join an image and a live stream?

Am 07.10.2022 um 19:32 schrieb i...@mbsoft.biz: i have 2 inputs first input image -i logo.png second input dshow webcam -f dshow -i video="my webcam" is it possible to show 5 seconds logo and and subsequently start webcam? Here is an example for switching between two inputs after 5 seconds

[FFmpeg-user] Help: is it possibile to join an image and a live stream?

i have 2 inputs first input image -i logo.png second input dshow webcam -f dshow -i video="my webcam" is it possible to show 5 seconds logo and and subsequently start webcam? thank you for any help ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.o

Re: [FFmpeg-user] help with pipe command ffmpeg

On Wed, Dec 8, 2021 at 10:12 PM Adam Nielsen via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote: > > i want to know how to output to a windows named pipe and reference > > that in c++ code as input ... > > > > kindly share some working command line examples of ffmpeg.exe > > > > googling is not much

Re: [FFmpeg-user] help with pipe command ffmpeg

> i want to know how to output to a windows named pipe and reference > that in c++ code as input ... > > kindly share some working command line examples of ffmpeg.exe > > googling is not much help full, tired of it... It seems that using named pipes is not very common. If you still want to use

Re: [FFmpeg-user] help with pipe command ffmpeg

44 PM To: ffmpeg-user@ffmpeg.org Subject: Re: [FFmpeg-user] help with pipe command ffmpeg On 12/7/2021 9:12 PM, Vivek Soni wrote: > what exactly did you write in command line for ffmpeg.exe, please share ... A couple of things- Please read the list FAQ (https://ffmpeg.org/mailing-list-faq.html). This

Re: [FFmpeg-user] help with pipe command ffmpeg

On 12/7/2021 9:12 PM, Vivek Soni wrote: what exactly did you write in command line for ffmpeg.exe, please share ... A couple of things- Please read the list FAQ (https://ffmpeg.org/mailing-list-faq.html). This tells us not to "top-post" and also to include the complete output of the command yo

Re: [FFmpeg-user] help with pipe command ffmpeg

what exactly did you write in command line for ffmpeg.exe, please share ... From: ffmpeg-user on behalf of William C Bonner Sent: Wednesday, December 8, 2021 3:11:41 AM To: FFmpeg user questions Subject: Re: [FFmpeg-user] help with pipe command ffmpeg On Mon

Re: [FFmpeg-user] help with pipe command ffmpeg

On Mon, Dec 6, 2021 at 9:50 PM Vivek Soni wrote: > Hi, > > > I am trying to run this command > > > ffmpeg -y -i "C:\Users\vivek.soni\Videos\How to use FFMPEG.mp4" -f > mpegts \\.\pipe\VideoPipeFromFFmpeg > > > I am trying to write to a named windows pipe and I want to read it from my > c++ code

[FFmpeg-user] help with pipe command ffmpeg

Hi, I am trying to run this command ffmpeg -y -i "C:\Users\vivek.soni\Videos\How to use FFMPEG.mp4" -f mpegts \\.\pipe\VideoPipeFromFFmpeg I am trying to write to a named windows pipe and I want to read it from my c++ code... However it is not sending all frames to pipe and I am unable

[FFmpeg-user] Help configure VS2019 environment for FFmpeg

I need some assistance configuring VS2019 to build FFmpeg as a 64 bit application for windows 10. I want to add the various libraries to my application so I can perform some audio operations without user intervention. I do not plan on modifying existing source code. Thanks for any help, Jack __

Re: [FFmpeg-user] help: I use av_err2str function in c++, it occurs " error: taking address of temporary array" when build.

On Thu, 10 Jun 2021 12:55:08 +0200 "Diederick C. Niehorster" wrote: > That macro doesn't work in C++. use: > > char a[AV_ERROR_MAX_STRING_SIZE] = { 0 }; > av_make_error_string(a, AV_ERROR_MAX_STRING_SIZE, errCode_); > > On Thu, Jun 10, 2021 at 12:40 PM ?? wrote: > > > > I use av_err2str fu

Re: [FFmpeg-user] help: I use av_err2str function in c++, it occurs " error: taking address of temporary array" when build.

That macro doesn't work in C++. use: char a[AV_ERROR_MAX_STRING_SIZE] = { 0 }; av_make_error_string(a, AV_ERROR_MAX_STRING_SIZE, errCode_); On Thu, Jun 10, 2021 at 12:40 PM 沈海煌 wrote: > > I use av_err2str function in c++, it occurs " error: taking address of > temporary array" when build. > >

[FFmpeg-user] help: I use av_err2str function in c++, it occurs " error: taking address of temporary array" when build.

I use av_err2str function in c++, it occurs " error: taking address of temporary array" when build. I use extern "C" but it doesn't work. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscri

Re: [FFmpeg-user] [help]does ffmpeg support AJA kona as input devices

> Am 02.03.2021 um 07:37 schrieb 梦开始的地方 <382607...@qq.com>: > > I use it on linux，how to compile ffmpeg with video4linux support kona Every Linux binary by default comes with video4linux2 support, you have to actively disable it if you don’t want it. Carl Eugen ___

[FFmpeg-user] [help]What are the parameter of compression ration, and Slow 1x, 2x, 3x , Also with Fast

Hello, For Android:- I'd like to know the parameter of the video Compression ratio with default orientation. Currently, I am using for Compress video (-y", "-i", yourRealPath, "-s", "160x120", "-r", "25", "-vcodec", "mpeg4", "-b:v", "150k", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath)

[FFmpeg-user] ?????? [help]does ffmpeg support AJA kona as input devices

I use it on linux，how to compile ffmpeg with video4linux support kona -- 原始邮件 -- 发件人: "FFmpeg user questions"

Re: [FFmpeg-user] [help]does ffmpeg support AJA kona as input devices

On 3/1/2021 10:25 PM, 梦开始的地方 wrote: hello,I'd like to know does ffmpeg support AJA kona as input devices？ AFAIK, Aja devices are not supported directly. If you're using windoze, you can have the Kona export a DirectShow device that ffmpeg can then capture. On linux, the Kona has video4linux s

[FFmpeg-user] [help]does ffmpeg support AJA kona as input devices

hello,I'd like to know does ffmpeg support AJA kona as input devices？ ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subje

Re: [FFmpeg-user] Help with creating MP4 video with multiple audio tracks

Hi Nicolas, Of course! Thank you very much, it works now. Cheers, Chiara - Chiara Rendeková Marketing Assistant +421 911 437 039 chiara.rendek...@foliovision.com Foliovision s.r.o. | Strelecká 2 - 81101 Bratislava - Slovakia > Dňa 18. 1. 2021 o 8:41, Nicolas George napísal: > > Chiara vi

Re: [FFmpeg-user] Help with creating MP4 video with multiple audio tracks

Chiara via ffmpeg-user (12021-01-18): > I’m new to this, so I apologize if I’m missing something trivial. I > need to create an .mp4 video output with multiple audio tracks in it. > I run the command: > > ffmpeg -i sample-mp4-file.mp4 -i hindi.aac -i tamil.aac -i telugu.aac > -map 1 -map 2 -map 3

[FFmpeg-user] Help with creating MP4 video with multiple audio tracks

Hello, I’m new to this, so I apologize if I’m missing something trivial. I need to create an .mp4 video output with multiple audio tracks in it. I run the command: ffmpeg -i sample-mp4-file.mp4 -i hindi.aac -i tamil.aac -i telugu.aac -map 1 -map 2 -map 3 -metadata:s:a:0 language=eng -metadata:s

Re: [FFmpeg-user] help needed, combine three simple calls into one?

> > ffmpeg -y -f concat -safe 0 -copyts -i videoList.txt -muxpreload 0 > > -muxdelay 0 -c copy -b:a 128K -cpu-used 0 -preset slow -movflags > > +faststart -f mp4 concat.mp4 > Make one file out of ??? files. Does this also re-encode anything? (What are > the input formats? see below) > > > ffmpeg -

Re: [FFmpeg-user] help needed, combine three simple calls into one?

On 11/26/2020 5:52 AM, Ram Shaffir wrote: From: ffmpeg-user On Behalf Of Ram Shaffir Sent: Thursday, November 26, 2020 2:53 PM Is it possible to combine the following three calls into one call instead? ffmpeg -y -f concat -safe 0 -copyts -i videoList.txt -muxpreload 0 -muxdelay 0 -c copy -b

Re: [FFmpeg-user] help needed, combine three simple calls into one?

> -Original Message- > From: ffmpeg-user On Behalf Of Ram > Shaffir > Sent: Thursday, November 26, 2020 2:53 PM > To: ffmpeg-user@ffmpeg.org > Subject: [FFmpeg-user] help needed, combine three simple calls into one? > > Hello all, > > I use FFmpeg in

[FFmpeg-user] help needed, combine three simple calls into one?

Hello all, I use FFmpeg in three steps, the first concat several videos into one, then sync the audio and finally trim the video. Is it possible to combine the following three calls into one call instead? ffmpeg -y -f concat -safe 0 -copyts -i videoList.txt -muxpreload 0 -muxdelay 0 -c copy -b

Re: [FFmpeg-user] Help required in vp9 streaming on LAN using 2 Pass encoding

On Wed, Oct 14, 2020 at 15:34:56 +0500, USMAN AAMER wrote: > I am working on vp9-RTP streaming over LAN and want to perform 2 pass > encoding but unable to do so as it is not generating .sdp file. > > I am using the following command: > > ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 1M -pass 1 -an -f

[FFmpeg-user] Help required in vp9 streaming on LAN using 2 Pass encoding

Hi, I am working on vp9-RTP streaming over LAN and want to perform 2 pass encoding but unable to do so as it is not generating .sdp file. I am using the following command: ffmpeg -i input.mp4 -c:v libvpx-vp9 -b:v 1M -pass 1 -an -f null /dev/null && ffmpeg -i input.mp4 -c:v libvpx-vp9 -an -b:v

Re: [FFmpeg-user] Help required in vp9 streaming and capturing on LAN

Hi, On Mon, Sep 07, 2020 at 12:04:29 +0500, USMAN AAMER wrote: > I am streaming videos on LAN using VP9 encoding (and .sdp file on > client-side) but able to capture the videos in a single file (at the > client). How can I capture those video files as a sequence of videos? Do have a look at the s

[FFmpeg-user] Help required in vp9 streaming and capturing on LAN

Hi, I am streaming videos on LAN using VP9 encoding (and .sdp file on client-side) but able to capture the videos in a single file (at the client). How can I capture those video files as a sequence of videos? ___ ffmpeg-user mailing list ffmpeg-user@ffmpe

Re: [FFmpeg-user] Help in improving the documentation is always welcome? [was: write output of find_rect to a file?]

On 2020-07-12 14:07, Carl Eugen Hoyos wrote: …The size of such a change [to the documentation] often gives a good indication of its usefulness. That rule of thumb might apply in some cases, especially where the current documentation is so close to the peak of perfection that any step is mo

Re: [FFmpeg-user] Help in improving the documentation is always welcome? [was: write output of find_rect to a file?]

Am So., 12. Juli 2020 um 22:14 Uhr schrieb Jim DeLaHunt : > > On 2020-07-12 05:21, Moritz Barsnick wrote: > > > …(Help in improving the documentation is always welcome…. Useful help in improving the documentation is welcome. The size of such a change often gives a good indication of its usefulnes

Re: [FFmpeg-user] Help in improving the documentation is always welcome? [was: write output of find_rect to a file?]

On 2020-07-12 05:21, Moritz Barsnick wrote: …(Help in improving the documentation is always welcome…. I wish it were so, Moritz. But in my experience, improving the documentation is not always welcome. For example: and thr

[FFmpeg-user] help

I want to convert m3u8 to mp4 and i would like to do conversion as well as download on same time. I am running this command *ffmpeg -i ultra.m3u8 -c copy -listen 1 -seekable 1 -f mp4 http://0.0.0.0:8080/test.mp4 * when user trigger this url("http://0.0.0.0:8080/tes

Re: [FFmpeg-user] help DRM

I mean to download that video to my computer to watch it offline, let say i wanna download Tv series episosed, but the video ( episode ) DRM protected, like netflix you know. في سبت، ٩ مايو، ٢٠٢٠ في ٦:١٩ ص، كتب Michael Glenn Williams < michael.glenn.willi...@smartblondeco.com>: > Hi Nassr, > > Wh

Re: [FFmpeg-user] help DRM

Hi Nassr, What do you mean by download? Literally FTP? No not possible. On Fri, May 8, 2020 at 10:12 AM Nasser Nano wrote: > Hi, is there anyway to download streaming video drm protected ? > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > ht

[FFmpeg-user] help DRM

Hi, is there anyway to download streaming video drm protected ? ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "un

[FFmpeg-user] help

HI, i’m new at this so i wanna ask is there away to download hls streaming video that DRM protected, I want to download from arabic site streaming movies and tv series like netflix but it’s drm protected. Thank you. ___ ffmpeg-user mailing list ffmpeg-use

[FFmpeg-user] Help using find_rect

Hi, i am trying to use the feature find_rect. I have a video with a single colored area which i would like to detect. I have tested different colors (white, black, blue) without success. The box is never replaced in the video. The ffmpeg command i use is: ffmpeg -i input.mp4 -loglevel debug -r

Re: [FFmpeg-user] help... ffmpeg - x264 probleme during installation

I'm Sorry Thanks Le mar. 19 nov. 2019 à 08:27, Carl Eugen Hoyos a écrit : > Am Di., 19. Nov. 2019 um 03:44 Uhr schrieb Philippe Sudre-Rouffaux > : > > > I have a problem during an installation using a bash file. > > (mediaspip_install.sh from https://github.com/kent1D/mediaspip_scripts) > > > >

Re: [FFmpeg-user] help... ffmpeg - x264 probleme during installation

Am Di., 19. Nov. 2019 um 03:44 Uhr schrieb Philippe Sudre-Rouffaux : > I have a problem during an installation using a bash file. > (mediaspip_install.sh from https://github.com/kent1D/mediaspip_scripts) > > At the beegining all is ok but when the file install ffmpeg, there is > always problem wit

[FFmpeg-user] help... ffmpeg - x264 probleme during installation

Hello, I have a Debian 8 server. I have a problem during an installation using a bash file. (mediaspip_install.sh from https://github.com/kent1D/mediaspip_scripts) At the beegining all is ok but when the file install ffmpeg, there is always problem with x264. Here is .log file. Makefile:2

Re: [FFmpeg-user] Help : Preserve meta data

Le mar. 6 août 2019 à 16:19, Moritz Barsnick a écrit : > On Tue, Aug 06, 2019 at 03:31:25 -0700, DopeLabs wrote: > > maybe this will help? > > > > https://libav.org/avconv.html#Metadata > > a) That's the command line tool of a different project. ;-) > b) Rockland wrote that s/he wishes to *preser

Re: [FFmpeg-user] Help : Preserve meta data

On Tue, Aug 06, 2019 at 03:31:25 -0700, DopeLabs wrote: > maybe this will help? > > https://libav.org/avconv.html#Metadata a) That's the command line tool of a different project. ;-) b) Rockland wrote that s/he wishes to *preserve*, not dump. And with libav, I assume, s/he meant using the librarie

Re: [FFmpeg-user] Help : Preserve meta data

maybe this will help? https://libav.org/avconv.html#Metadata > On Aug 6, 2019, at 2:30 01AM, Rockland wrote: > > Hello all, > > Can someone tells me which option I can add among my configure options to > preserve metadata during transcoding? In command line I know that the > option is map_met

[FFmpeg-user] Help : Preserve meta data

Hello all, Can someone tells me which option I can add among my configure options to preserve metadata during transcoding? In command line I know that the option is map_metadata but I'm using libav in my project. This is my configure options : CONFIGURE_COMMAND env LD_PRELOAD=${ALGOL

Re: [FFmpeg-user] Help with the ffmpeg parameter 'scale2ref' and -report

I have added 'scale2ref' to my ffmpeg command (in the php web video script ffmpeg file) and it appears to be preventing the video from uploading/proceeding. So, I added in -report to see a report for a possible cause, but I am not clear on how/where to see the output/report: $ffmpegCommand =''.

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

Paul, I had trouble with that plugin also. I wonder if you could take a look at my issue and give me some of your thoughts: https://github.com/werman/noise-suppression-for-voice/issues/11 Thanks. On Fri, May 10, 2019 at 12:10 PM Paul B Mahol wrote: > On 5/10/19, David Ing wrote: > > I did no

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

On 5/10/19, David Ing wrote: > I did not have the "lv2ls" command, so I installed it like this: > > sudo apt-get install --yes lilv-utils > > > Unfortunately when I execute "lv2ls", it shows that I have no plugins > installed (i.e. it does not return anything). > > But this is where I can see the

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

I did not have the "lv2ls" command, so I installed it like this: sudo apt-get install --yes lilv-utils Unfortunately when I execute "lv2ls", it shows that I have no plugins installed (i.e. it does not return anything). But this is where I can see the plugin files on my system: root@22f908a93c0

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

On 5/10/19, David Ing wrote: > Yes Paul, if you see earlier in this email thread, I tried to follow the > documentation (https://ffmpeg.org/ffmpeg-filters.html#lv2) but it was a bit > vague. It suggested (vaguely) that I should use the following command, > but it failed because the colon was not

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

Yes Paul, if you see earlier in this email thread, I tried to follow the documentation (https://ffmpeg.org/ffmpeg-filters.html#lv2) but it was a bit vague. It suggested (vaguely) that I should use the following command, but it failed because the colon was not escaped by the filtergraph escaping la

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

On 5/10/19, David Ing wrote: > There was a slight copy-paste error in my last email. > > Here are the contents of my file: > */usr/local/lib/lv2/sdenoise.lv2/manifest.ttl* > > @prefix lv2: . > @prefix rdfs: . > >

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

There was a slight copy-paste error in my last email. Here are the contents of my file: */usr/local/lib/lv2/sdenoise.lv2/manifest.ttl* @prefix lv2: . @prefix rdfs: . a lv2:Pl

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

Moritz, Thank you. Although your suggestion did not work, you gave me enough information to find one that did. The following works from a bash prompt. ffmpeg -i $INPUT -af 'lv2=plugin=https\\:// github.com/lucianodato/speech-denoiser' $OUTPUT Now I have a separate problem which is: *Plugin <

Re: [FFmpeg-user] Help with syntax using lv2 filter plugin

On Thu, May 09, 2019 at 15:57:01 -0700, David Ing wrote: > The command I'm using is: > > ffmpeg -i $INPUT -af > lv2=plugin=https://github.com/lucianodato/speech-denoiser $OUTPUT Apparently, the quoting isn't sufficient, because: > error: attempt to map invalid URI `https' > [lv2 @ 0x5617

[FFmpeg-user] Help with syntax using lv2 filter plugin

Hi I am wondering about the exact syntax for using ffmpeg with an LV2 filter. The command I'm using is: ffmpeg -i $INPUT -af lv2=plugin=https:// github.com/lucianodato/speech-denoiser $OUTPUT But I get an "Error initializing filter 'lv2'" error: ffmpeg version 4.1.3-0ubuntu1 Copyright (

[FFmpeg-user] help: ffmpeg: Queue input is backward in time error

Hi Community, Here's my query: RTMP stream encodes correctly until it beings to loop over the content. Once the loop starts, the stream stops and the following error messages are spitted out. I've noticed that this happens when I use both -ss and -stream_loop commands together. -ss is important

Re: [FFmpeg-user] Help with Concatenating Please

On 2019-04-04 07:58, Mark Scott wrote: Thank you for the Info, Jim. Here's the command line that I use to batch encode ProRes HQ. My master files are already the correct size and frame rate, so that info is not included. mkdir outputs for f in *.mov; do ffmpeg -i "$f" -c:v prores -profile:v 3 -m

Re: [FFmpeg-user] Help with Concatenating Please

Thank you for the Info, Jim. Here's the command line that I use to batch encode ProRes HQ. My master files are already the correct size and frame rate, so that info is not included. mkdir outputs for f in *.mov; do ffmpeg -i "$f" -c:v prores -profile:v 3 -movflags +write_colr -c:a pcm_s24le "outpu

Re: [FFmpeg-user] Help with Concatenating Please

On 4/3/2019 4:59 PM, Jim DeLaHunt wrote: Ah. You are in for an adventure, then. *ffmpeg* can do many things, but "gently introduce people to use of command lines" is not usually one of them. :-) So true... Mark, you'd do well to closely read the docs about how ffmpeg parses command lines; th

Re: [FFmpeg-user] Help with Concatenating Please

Hello, Mark: Welcome to the ffmpeg-user mailing list. I hope you are able to find out what you need, and get good use out of *ffmpeg*. On 2019-04-03 14:01, Mark Scott wrote: …I need to add 2 seconds of black silent video to the head of the encoded file. Would this be accomplished by concatena

[FFmpeg-user] Help with Concatenating Please

Hello, I'm very new to ffmpeg and I don't have much experience using command lines to encode video. I need to take an Apple ProRes file, 1920x1080, 23.98 fps, 16 bit integer stereo audio, and encode it to be Apple ProRes 422 HQ 1920X1080, 23.98fps 24bit integer stereo audio. The trick is, I n

Re: [FFmpeg-user] Help: How to add subtitles to a video created from images?

Thank you. Adding the fps filter solved my problem. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Help: How to add subtitles to a video created from images?

On 15-02-2019 10:49 AM, Srinidhi S wrote: I am trying to use ffmpeg to create a video from images and add subtitles to the video. The following is the command that I am using ffmpeg -f concat -i input.txt -i 02-38-2019-112729.m4a -vf "scale=1280:720,subtitles=subtitles.srt" -pix_fmt yuv420p o

[FFmpeg-user] Help: How to add subtitles to a video created from images?

I am trying to use ffmpeg to create a video from images and add subtitles to the video. The following is the command that I am using ffmpeg -f concat -i input.txt -i 02-38-2019-112729.m4a -vf "scale=1280:720,subtitles=subtitles.srt" -pix_fmt yuv420p output.mp4 where input.txt is a text file in t

Re: [FFmpeg-user] Help, error during transcoding

> I enable libx264 (--enable libx264 )in my configure options and it works. > But I have an other question. > I know that the function used to encode picture in h263 is static int > encode_picture(MpegEncContext *s, int picture_number) > located at ffmpeg/libavcodec/mpegvideo_enc.c file. Correct

Re: [FFmpeg-user] Help, error during transcoding

Le jeu. 31 janv. 2019 à 15:26, Moritz Barsnick a écrit : > On Thu, Jan 31, 2019 at 13:18:53 +0100, NDJORE BORIS wrote: > > When I try to transcode some mp4 or avi videos, I have this error: > > > > [h264_vaapi @ 0x17cf500] A hardware frames reference is required to > > associate the encoding devi

Re: [FFmpeg-user] Help, error during transcoding

On Thu, Jan 31, 2019 at 13:18:53 +0100, NDJORE BORIS wrote: > When I try to transcode some mp4 or avi videos, I have this error: > > [h264_vaapi @ 0x17cf500] A hardware frames reference is required to > associate the encoding device. > Cannot open video encoder for stream #1 You need to show us t

[FFmpeg-user] Help, error during decoding

Hello Team, When I try to decode some mp4 or avi videos, I have this error: [h264_vaapi @ 0x17cf500] A hardware frames reference is required to associate the encoding device. Can someone explain what it means or help me to fix it, please? Regards ___

[FFmpeg-user] Help, error during transcoding

Hello Team, When I try to transcode some mp4 or avi videos, I have this error: [h264_vaapi @ 0x17cf500] A hardware frames reference is required to associate the encoding device. Cannot open video encoder for stream #1 Can someone explain what it means or help me to fix it, please? Regards __

Re: [FFmpeg-user] Help, Transcoding video

Ok for the mistake on the mailing list. But I want to know if I can't call the second encoder in an other loop. Because I want to extract all motion vector in the input video during the first encoding step and after do some actions on them and reencode my output file while putting the above extract

Re: [FFmpeg-user] Help, Transcoding video

2019-01-23 15:12 GMT+01:00, NDJORE BORIS : > I want to encode two times my input video file while decoding it juste one > time. > I use doc/examples/transcoding.c > > What I want to do is to decode and encode like the tr

[FFmpeg-user] Help, Transcoding video

Hello Team, I want to encode two times my input video file while decoding it juste one time. I use doc/examples/transcoding.c What I want to do is to decode and encode like the transcoding.c examples does. Then, when I f

[FFmpeg-user] help transcoding video

Hello Team, I try to transcode videos based on the example : doc/examples/transcoding.c But while trying to open some video files (not all), I have the following error: [h264_vaapi @ 0xca3540] A hardware frames refere

Re: [FFmpeg-user] Help free() invalid pointer

2019-01-16 18:18 GMT+01:00, NDJORE BORIS : > Hello all, > I need help please. > I use ffmpeg in my cpp program. > In the main of my main.cpp file I initialize two times codeccontext and > filtercontext. > Because at one hand, I extract motion vecteur and do somes actions > (editing) on them (mvs).

[FFmpeg-user] Help free() invalid pointer

Hello all, I need help please. I use ffmpeg in my cpp program. In the main of my main.cpp file I initialize two times codeccontext and filtercontext. Because at one hand, I extract motion vecteur and do somes actions (editing) on them (mvs). And at the second time, I put edited motion vectors in t

Re: [FFmpeg-user] Help configure error

On 1/8/2019 6:48 AM, NDJORE BORIS wrote: When I build ffmpeg with gcc4.9 on ubuntu 16.04 I have this error: ffmpeg/libavcodec/idctdsp.h:23:20: fatal error: config.h: No such file or directory. How can I fixe this, please? Did you run ./configure first? If so, please include it's full output.

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