Re: [FFmpeg-user] Reliable audio capture method on windows ? (stereo mix does not exist on most computers)

On Mon, Nov 7, 2022 at 11:17 PM Joe Smithy wrote: > > Hi, > > I need a way to capture output audio that works reliably on most computers > without having to know anything about the state of said computer. > > Searching for ffmpeg how to capture desktop audio only returns variants of > > -f dshow -

Re: [FFmpeg-user] RTMP speed vlue never reaches 1 (100%), streamign fail in short time

Maybe the network can't keep up with the bandwidth required? If it says dropping that's not fatal FWIW. On Tue, Jun 28, 2022 at 8:06 AM Lordrak wrote: > > Hello, > > I am trying streaming rtpm using ffmpeg but i have few problems. FPS has > never reach 25fps, only 21 for example. So stream stopp

Re: [FFmpeg-user] Hauppauge WinTV-7164 Analog Composite/S-Video Capture

> BUG: The device specific URLS provided by ffmpeg dshow "-list_devices" for > this > Hauppauge provided some extremely length device URLs that were apparently not > recognized by the dshow video= and audio= options. Examples please? :) ___ ffmpeg-user

Re: [FFmpeg-user] ffmpeg combining live video from 3 cameras

"Maybe" with avisynth and a special input, but in general donations welcome to make the dshow module able to do this :) On Mon, Jul 18, 2022 at 10:35 PM ashwin Nair wrote: > > Hi All, > > I have 3 USB cameras streaming video at a specific resolution. I am trying > to merge the videos together usi

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

Without yadif it comes in at 59.94i ? On Sat, Apr 23, 2022 at 1:36 PM Alex wrote: > > On Tuesday, April 19th, 2022 at 2:03 AM, Roger Pack > wrote: > > Can you replicate it not using dshow? > > Not in any way that I know of. I recorded raw output from the capture card &g

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

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

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

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 s

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

Input frame rate is still the same both ways? On Fri, Aug 13, 2021 at 10:06 PM Alex via ffmpeg-user wrote: > > I'm using ffplay as a live preview for my capture card, and I'm trying to use > the yadif filter in mode 1 (send_field) to deinterlace the 59.94i input to > 59.94 fps. > > Using this com

Re: [FFmpeg-user] ADD REAL TIME STAMP TO RTSP STREAM SEGMENT

On Fri, Apr 17, 2020 at 5:38 PM Michael Glenn Williams wrote: > > We have interest in being able to read timestamps in protocol headers also. > > Do we have a doc that specifies which protocols in the video stream ffmpeg > supports with a timecode, and what format of the timecode is? Probably dep

Re: [FFmpeg-user] ADD REAL TIME STAMP TO RTSP STREAM SEGMENT

On Tue, Sep 3, 2019 at 3:01 PM Alejandro Escudero wrote: > > Hi, > > I am trying to get a RTSP stream from an IP Camera and save that stream as > several MP4 segments, but i need that each file segment name gets the real > time stamp of the video stream. (If I use the -strftime 1, it gets the t

Re: [FFmpeg-user] delay time in live ultrasound converter

On Thu, Aug 22, 2019 at 3:16 PM Michael Koch wrote: > > Hello Paul, > > > ffplay and using pipe gives you huge delay. By using mpv and filtergraph > > directly you would get much lesser delay. > > Default delay introduced by this filter is the one set by win_size in > > number of samples, which is

Re: [FFmpeg-user] DVD EIA-608 to ASS from stdin with custom style

Does it use cc_dec for the decoder? On Fri, Sep 20, 2019 at 12:06 AM CGar wrote: > > When extracting EIA-608 captions from a DVD to an ASS file I am > unsure how to specify the style. I've seen snippets online about a > force_style option but it seems to be about hardcoding them or > specifying

Re: [FFmpeg-user] Ffmpeg is a Windows codec?

On Thu, Sep 19, 2019 at 11:37 AM jamie marchant wrote: > > Is their a Windows codec available? I want to play Indeo video 3 files, > which FFPlay can do but I want to play it through 'Video for > Windows"(Windows NT/10 version). That way I can run an old piece of > multimedia software. possibly L

Re: [FFmpeg-user] "Invalid argument" when running ffmpeg.exe with a pipe as video input

Same version of ffmpeg works on other computers? I suppose you could drill into the code and try and see what it's doing with pipes... On Fri, Oct 18, 2019 at 8:02 AM Alessandro Santos wrote: > > I am creating a c# application to record videos H264. > > The workflow of my application is like thi

Re: [FFmpeg-user] screen cast windows 10 desktop with audio

Screen cast it to where? On Mon, Mar 16, 2020 at 1:52 PM Lance Bermudez wrote: > > How do i screen cast a windows 10 desktop with audio? > > PS C:\Users\lance> ffmpeg -list_devices true -f dshow -i dummy > > ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg > developers >

Re: [FFmpeg-user] Unable To Transcode 8 sources simultaneously Real Time In One Instance

Yeah if you are exhausting a huge buffer like that it means you are getting wy behind in the real time aspect, yes? On Mon, May 13, 2019 at 4:50 PM Gabriel Balaich wrote: > > > > > 2G seems like a very large buffer... > > > > Even when in the context of attempting to transcode 9k worth of foo

Re: [FFmpeg-user] Detect Frozen video

On Wed, Nov 28, 2018 at 4:46 AM José María Infanzón wrote: > > Hi All, I'm streaming a live channel and I want to use ffmpeg to monitor > the stream, what I need to check is when the image is frozen. Is there a > way yo achieve this? I've read that I can use blend function, but not sure > how. ff

Re: [FFmpeg-user] Unable To Transcode 8 sources simultaneously Real Time In One Instance

-rtbufsize 2147.48M 2GB? maybe it's just filling right up... On Mon, Jan 14, 2019 at 12:10 PM Gabriel Balaich wrote: > > I've decided to post this same question on Superuser in an attempt to get > more eyes on the issue: > https://superuser.com/questions/1394234/unable-to-transcode-8-sources-in-

Re: [FFmpeg-user] does ffmpeg support ffserver

It lists a few streaming options here https://trac.ffmpeg.org/wiki/StreamingGuide FWIW. On Sat, Apr 6, 2019 at 8:21 AM qw wrote: > > Hi, > > > Thanks for your help. > > > Have you used python-librtmp to transfer rtmp stream? > > > Thanks > > > Regards > > > Andrew > > At 2019-04-01 06:13:19, "Mic

Re: [FFmpeg-user] "DirectShow video devices (some may be both video and audio devices)"

DirectShow video devices (some may be both video and audio devices) maybe? I think you can see the pins if you run with -loglevel verbose good luck! On Mon, Apr 29, 2019 at 8:00 PM Gabriel Balaich wrote: > > Quick question regarding calling devices via dshow in FFmpeg, > > I'm trying to capture

Re: [FFmpeg-user] Cannot receive audio/video from Unreal WebRTC DirectShow Source filter

On Sat, Oct 27, 2018 at 5:54 AM Roger Pack wrote: > > On Thu, Sep 20, 2018 at 12:08 PM Maxim Ershtein wrote: > > > > Hello, > > > > I am trying to record VP9/Opus -encoded live stream into .mkv file. The > > live stream is being encoded by Chrome browser and

Re: [FFmpeg-user] Cannot receive audio/video from Unreal WebRTC DirectShow Source filter

On Thu, Sep 20, 2018 at 12:08 PM Maxim Ershtein wrote: > > Hello, > > I am trying to record VP9/Opus -encoded live stream into .mkv file. The > live stream is being encoded by Chrome browser and sent via WebRTC to > Unreal Media Server. > > Unreal Media Server allows installing WebRTC DirectShow S

Re: [FFmpeg-user] Max rtbufsize Via dshow

On Fri, Sep 14, 2018 at 10:33 AM Gabriel Balaich wrote: > > Up until a few days ago I had been running two capture cards, 1x4K card and > 1x1080P card, I would encode both streams with a > GTX 1080 no dropped frames no issues. But just recently I replaced the > 1080P capture card with another 4K c

Re: [FFmpeg-user] Reducing Latency while streaming desktop

https://trac.ffmpeg.org/wiki/StreamingGuide#Latency may be of some use to you. On Sat, Aug 25, 2018 at 12:24 PM Thomas Glanzmann wrote: > > Hello, > I would like to use ffmpeg to stream my windows 7 desktop to windows 10 > desktops on the same broadcast domain. Last week I used the following two

Re: [FFmpeg-user] Decoding frames as fast as possible

On Tue, Jul 24, 2018 at 2:50 PM, Évan wrote: > On Mon, Jul 23, 2018 at 8:45 AM, Roger Pack wrote: >> Does ffprobe take 20s? > > I just tested and "ffprobe.exe -show_entries frame=pkt_pts_time > bbb_sunflower_1080p_30fps_normal.mp4" does take time to complete. I a

Re: [FFmpeg-user] Anyone having success capturing hours of 4k video, reliably and with low loss, using ffmpeg?

On Tue, Aug 7, 2018 at 3:15 PM, Gabriel Balaich wrote: >> >> You are missing the question. >> >> I am not asking for help to diagnose that simple experiment. I am asking >> if others have had experience with the top-level goal: capturing hours >> of 4k video, reliably and with low loss, using ffmp

Re: [FFmpeg-user] How to build static fontconfig with ffmpeg?

ar x libpng16.a" && ar cru > libfreetype.new.a ./*.o && ranlib libfreetype.new.a > > > > Is there another method to build fontconfig? Is it possible to build > fontconfig by only running configure and make? > > > > Thanks! > > > Regards &

Re: [FFmpeg-user] FFplay network stream with low latency

https://trac.ffmpeg.org/wiki/StreamingGuide#Latency may be useful to you... On Sun, Aug 5, 2018 at 7:41 PM, Elliott Balsley wrote: > I discovered an option in picamera python module to include the framerate in > the SPS headers, so now I will use that instead of raspivid. Plus it’s more > flex

Re: [FFmpeg-user] Anyone having success capturing hours of 4k video, reliably and with low loss, using ffmpeg?

he [bandwith] and storage as >> ffmpeg doesn't need to process nothing and it could be done with any >> stream >> saver program > > > This sounds reassuring, as if this isn't such a hard task after all. But I > don't hear you saying that you know of someone

Re: [FFmpeg-user] Decoding frames as fast as possible

Does ffprobe take 20s? On Tue, Jul 3, 2018 at 2:23 AM, Evan wrote: > Hi everyone, > > I'm developping a media player featuring advanced video/frame processing. > To be able to seek to any particular frame, I need to know, for each frame, > its presentation time and if available, if it's a key fra

Re: [FFmpeg-user] How to build static fontconfig with ffmpeg?

Wonder if it should be or use another configure command : ./configure --disable-shared --enable-static LDFLAGS="-L/usr/local/lib" LIBS="-lfreetype -lharfbuzz -lpng" If that doesn't work maybe the circular dep. with harfbuzz and free type isn't trivial? On Tue, Jul 17, 2018 at 7:20 AM, qw wrote:

Re: [FFmpeg-user] FFMPEG configure FAILD

At the end /tmp/ffconf.QPyKsvYV/test.c:1:23: error: lame/lame.h: No such file or directory you probably need to set CPATH to your include dir and LIBRARY_PATH to your lib dir ref: https://github.com/rdp/ffmpeg-windows-build-helpers/blob/master/cross_compile_ffmpeg.sh#L2140 GL! On Fri, Jul 20,

Re: [FFmpeg-user] Best option for live stream

This page https://trac.ffmpeg.org/wiki/StreamingGuide may be useful to ya. On Fri, Jul 20, 2018 at 5:20 AM, hans gerte wrote: > Hi all. > need some advise on parameters for live streaming. > This is currently my string, it takes the stream from tvheaedned: > need to lower the bitstream as im send

Re: [FFmpeg-user] Anyone having success capturing hours of 4k video, reliably and with low loss, using ffmpeg?

It "should" work assuming your transcoding/disk can keep up with realtime ... On Thu, Jun 28, 2018 at 3:50 PM, Jim DeLaHunt wrote: > On 2018-06-28 14:21, Carl Eugen Hoyos wrote: > > 2018-06-28 21:58 GMT+02:00, Jim DeLaHunt : >> >> We tried a simple experiment. We set up a 4K camera in the >>> of

Re: [FFmpeg-user] 4K 60Hz Directshow Video Capture

> > One more question, what is the command to use the maximum buffer size? > -rtbufsize INT_MAX doesn't work. Thanks. > > -Original Message- > From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of Roger > Pack > Sent: Tuesday, February 27, 2018 8:03 PM

Re: [FFmpeg-user] Support request - configuring ffmpeg for YouTube Live 60fps

On 4/25/18, Stuart Porter wrote: > Hi there, > > Firstly, forgive any rookie mistakes – I’m new here and not a seasoned > support blog user. Neither am I a developer of any sort. > > I’m working with a developer though and we are trying to configure ffmpeg > to stream live from a video capture dev

Re: [FFmpeg-user] can't capture from audio speakers, but well from microphone

On 3/10/18, Carl Zwanzig wrote: > On 3/10/2018 6:01 AM, Phil Forneur wrote: >> I can't capture from audio speakers, but well from microphone. > > Speakers/audio-out aren't considered an input device. > > If you're trying to capture what's being played out those speakers, you need > software to int

Re: [FFmpeg-user] Any Actual Solution to "Past Duration Too Large"?

There are a few tracs on it, and this: https://superuser.com/questions/902661/ffmpeg-past-duration-0-xx-too-large Seems to be a bug somehow to me but I never looked closely enough. On Mon, Apr 16, 2018 at 7:50 PM, Gabriel Balaich wrote: > Hey all, I'm having an issue with the "Past duration

Re: [FFmpeg-user] ffmpeg and two (2) logitech 920 webcams

On Sat, May 19, 2018 at 4:34 PM, Brenda Spinner wrote: > I am using the following line to preview my webcam: > > ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f dshow > -i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview" > > this line works fine with cam #1, howe

Re: [FFmpeg-user] 4K 60Hz Directshow Video Capture

consider also libx264 "ultrafast" preset, GL! On Tue, Feb 13, 2018 at 7:57 AM, Alex P wrote: > I think I've figured it out. When I use nv12 or yuv420p as the input and > output pixel format, I get x1 performance. If I use bgr24/rgb24 as the > input and yuv444p as the output, I get around x0.3. >

Re: [FFmpeg-user] Encoding 4K 60Hz lossless from a capture card

You are still performing encoding: "(native) -> (h264)" On 12/12/17, Alex Pizzi wrote: > Windows 10 64-bit > Ryzen 7 > GTX 1080 > 32GB RAM > > Hi all, > > I'm trying to encode 4K 30/60Hz video in a lossless format from a 4K > capture card and everything I've tried gives me a similar error as in

Re: [FFmpeg-user] Batch convert JPG to Animated GIF's - Where to start?

Appears ffmpeg can create animated gif's https://stackoverflow.com/questions/3688870/create-animated-gif-from-a-set-of-jpeg-images In terms of a script to pass ffmpeg the right parameters, that's unfortunately, probably on you mate. On 11/17/17, colink wrote: > I have very little experience with

Re: [FFmpeg-user] ffmpeg on windows seems to ignore -to

Works in linux? What versions of ffmpeg? On 10/20/17, Kevin Duffey wrote: > Hi all, > So I am using this simple command on Windows 10 (64-bit) command to cut out > a small clip: > ffmpeg -i input.mov -ss 00:18:22.0 -to 00:18:44.0 -c copy clip10.mov > > This *should* give me a 22 second clip. > In

Re: [FFmpeg-user] Take webcam picture with minimal delay

Maybe overwrite a jpg file "over and over" and just grab a copy of it on demand when you need it? On 9/20/17, m...@stefan-kleeschulte.de wrote: > Hi everyone! > > I want to take a picture from a webcam (to send it in a http server's > response). I already found a command to take a picture and wri

Re: [FFmpeg-user] How to have a secure UDP BroadCast

I don't think UDP can have passwords can it? On 10/2/17, hassan shatnawi wrote: > Dears, > > How to have a secure connection with username and password while > broadcasting "UPD" > > I've use this command > > ffmpeg -f dshow -video_size 1280x720 -rtbufsize 702000K -framerate 30 > -i video="Video

Re: [FFmpeg-user] Record H264 webcam with DirectShow

hmm wonder what types those pins are broadcasting :| On 7/29/17, Aviv Hurvitz wrote: > Now with debug output: > >>ffmpeg -y -f dshow -video_size 640x480 -vcodec h264 -framerate 30 -report > -loglevel trace -rtbufsize 100M -i video="Microsoft LifeCam Front" -vcodec > copy -copyinkf out1.mp4 > ff

Re: [FFmpeg-user] Record H264 webcam with DirectShow

output with -loglevel debug? On 7/28/17, Aviv Hurvitz wrote: > I’m on a Surface Pro 3 running Windows 10. Trying to record an mp4 from a > native H.264 stream. > > The H.264 video sources are on the second “pin” and I suspect that’s the > problem. But the first and second pins have the same name,

Re: [FFmpeg-user] Screen Capture - Windows 10

Maybe turn off graphics acceleration for your browser? On 6/1/17, Ron Barnes wrote: > Hello all, > > > > I have been trying for days to figure out how to capture the video from my > desktop and save it as a playable file. I've been successful to a point. > > I am able to capture audio and video

Re: [FFmpeg-user] gdigrab just capturing a still frame when using window title

On 5/12/17, Kenn Sippell wrote: > Hello! I am attempting to use ffmpeg to record some video games. In this > scenario I'm recording Dota 2 from my PC (working great) and from my laptop > (having some problems). > > ffmpeg -f gdigrab -i desktop output.flv > > This command works fine on both my PC

Re: [FFmpeg-user] Question about CBR bit rate settings

I think you're right, the tutorial is probably outdated. On 4/15/17, Gil Yoder wrote: > According to Korbel in *FFmpeg Basics*, "To set the constant bit rate for > the output, three parameters must have the same value: bitrate (-b option), > minimal rate (-minrate) and maximal rate (-maxrate)" (p

Re: [FFmpeg-user] Unsynced audio while recording from several sources

does async or vsync options help? On 4/4/17, Valeriy Shevchuk wrote: > Hello, everyone. > I'm trying to use FFmpeg to record video and 3 audio sources and use it to > generate 3 different video files - each file should contain the same video > stream but the different audio stream. The problem is

Re: [FFmpeg-user] compile ffmpeg missing Xlib, or indevs is empty

On 1/14/17, 密思刘 wrote: > ffmpeg-3.2.2/b4$../configure --disable-ffplay --disable-ffprobe > --disable-ffserver --disable-doc --disable-htmlpages --disable-manpages > --disable-podpages --disable-txtpages --disable-logging --disable-protocols > --enable-protocol='file,data,pipe' --disable-encoders -

Re: [FFmpeg-user] Help with -video_size

On 1/6/17, Tim Hiles wrote: > Hi Moritz, Roger > > Hi Moritz > >> >> > >> > Can you be a bit more clear? Are you trying to record the full 1366x768 >> > and resize it to 1024x768, or are you trying to capture only 1024x768 >> > of your screen? >> > > I wanted to resize to 1024x768. Not capture par

Re: [FFmpeg-user] Help with -video_size

On 1/6/17, Moritz Barsnick wrote: > On Fri, Jan 06, 2017 at 00:14:31 -0800, Tim Hiles wrote: >> I've tried recording my screen set at 1366 x 768 and specified -video_size >> to 1024x768. The command did create a recording however it did not change >> the size. The output is below (further comments

Re: [FFmpeg-user] Audio slowly getting out of sync

On 11/21/16, Gabor Alsecz wrote: > Dear All, > > I have an issue when encoding HLS stream from an RTSP mjpeg video stream + > USB audio via dshow. > At the beginning audio & video are in sync but slowly but steadily the > sound drifting out of sync. Video seems faster, approximately each 10 > minu

Re: [FFmpeg-user] Single Audio stream to multiple FFmpeg process?

I think two devices can record from the same mic can't they? (but not video, though maybe that's possible now in windows 10 dunno otherwise you could split it in show or like you were saying with pipes "maybe" LOL) http://betterlogic.com/roger/2013/05/directshow-webcam-splitter/ GL! On 11/8/16, Ga

Re: [FFmpeg-user] ffmpeg3 crashes on sending rtsp

On 9/13/16, Carl Eugen Hoyos wrote: > 2016-09-13 2:25 GMT+02:00 Shi Qiu : > >> ffmpeg3 only crash when I send rtsp. > > Can you test if this is a regression since 00e122bc / works > with 4873952f? > (Ticket #5844) See also http://ffmpeg.org/pipermail/ffmpeg-user/2016-September/033610.html and may

Re: [FFmpeg-user] screen capture

You install this: https://github.com/rdp/screen-capture-recorder-to-video-windows-free another option is to use "gdigrab" for input option On 9/2/16, Peter Balazovic wrote: > I want to capture the screen for example: > > ffmpeg -f dshow -i video="screen-capture-recorder" output.flv > > seems to m

Re: [FFmpeg-user] (no subject)

On 7/15/16, Tim Hiles wrote: > Hi all, > > Seeing odd behavior with screen capture recorder. > > This always works on win 7. No problems. Even when resolution is set to > 1920 x 1080 > > c:\ffmpeg\ffmpeg\bin\ffmpeg.exe -f dshow -i > video="screen-capture-recorder":audio="Microphone Array (Realtek

Re: [FFmpeg-user] Webcam RTMP stream - video problems

On 6/21/16, hdt1...@tom.com wrote: > Hello, > > I'm trying to capture audio and video from a webcam and stream it via RTMP > to a Red5 media server, where others can then view the live stream. > When I do it from a Flash applet (Publisher Demo from the Red5 > distribution), it works without proble

Re: [FFmpeg-user] Help, cannot connect to my webcam (message : Could not RenderStream to connect pins, I/O error)

From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of Roger > Pack > Sent: Tuesday, May 10, 2016 10:57 PM > To: FFmpeg user questions > Subject: Re: [FFmpeg-user] Help, cannot connect to my webcam (message : > Could not RenderStream to connect pins, I/O error) > > can ot

Re: [FFmpeg-user] Using ffmpeg to stream to or from Blackmagic Decklink Card

On 6/13/16, davood afshari wrote: > Hello, > I want to use blackmagic cards with ffmpeg to stream their input but there > is a problem. > When I use "H264 Pro" Encoder as a "decklink" or "dshow" input, I see this > error in command line output of ffmpeg. Device is ok and I can Use it with > other

Re: [FFmpeg-user] Any way to get better use of the cpu?

On 2/23/16, Carl Eugen Hoyos wrote: > Roger Pack gmail.com> writes: > >> I'm referring more to the fact that if I output to two >> outputs, from the same ffmpeg instance, in essence, this: >> >> ffmpeg -i input output1 output2 >> >> ta

Re: [FFmpeg-user] dvb_teletext -> .srt fails?

On 1/15/16, Marton Balint wrote: > > On Fri, 15 Jan 2016, Roger Pack wrote: > >> similar to >> https://lists.ffmpeg.org/pipermail/ffmpeg-user/2015-June/027029.html >> and >> >> https://trac.ffmpeg.org/ticket/3025 >> >> My "quest" is to

Re: [FFmpeg-user] I can't find any video devices on the Windows 7 source system

Let me know if the documentation is still insufficient so I can adjust it. Thanks! > On 05/28/2016 02:38 AM, Roger Pack wrote: >> Did you install a screen capturing dshow device (ex: >> screen-capture-recorder)? >> Also see gdigrab. >> GL! >> >> On 5/27/16, Jo

Re: [FFmpeg-user] Can FFMPEG output as a directshow device viewable by other windows applications ?

> The question is what program can grab a video from my capture card, process > using ffdshow and then output as a virtual webcam ? > > Jeff > > > On Thu, Sep 17, 2015 at 7:37 PM, Roger Pack wrote: > >> You may be able to use ffdshow for it [?] >> >> O

Re: [FFmpeg-user] I can't find any video devices on the Windows 7 source system

Did you install a screen capturing dshow device (ex: screen-capture-recorder)? Also see gdigrab. GL! On 5/27/16, John Lewis wrote: > I would like to stream a desktop from one computer running Windows 7 to > another to on a LAN running Debian 8 to show an application that is on > the screen from

Re: [FFmpeg-user] Help, cannot connect to my webcam (message : Could not RenderStream to connect pins, I/O error)

can other programs use your lifecam? On 5/10/16, 김찬 wrote: > Thanks Carl, > Here is the output. I gave the recording command (ffmpeg -f dshow -i > video="..." test.mp4) while I was streaming the web cam video using LifeCam > player.(displaying the camera on my notebook). > > D:\ffmpeg-20160508-gi

Re: [FFmpeg-user] named pipes ffmpeg

ameters to write to this pipe? Does anyone experience with named pipes? > > Kind regards, > > Robin > > -Oorspronkelijk bericht- > Van: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] Namens Roger Pack > Verzonden: dinsdag 3 mei 2016 3:43 > Aan: FFmpeg user

Re: [FFmpeg-user] screen_capture_recorder to record 2nd monitor

you can use the crop filter or set screen capture recorder boundaries itself (in the registry, see its README). HTH. -roger- On 4/25/16, Tim Hiles wrote: > I use exactly what they suggest on the screen_capture_recorder ffmpeg faq > to record desktop. > > ffmpeg.exe -f dshow -i video="screen-captu

Re: [FFmpeg-user] ffmpage win7 screen record cursor is abnormal

So mouse is the wrong size or wrong pointer or what here? On 4/28/16, Ni Wesley wrote: > Hi guys, > > I hit a problem when recording screen on window 7 using ffmpeg. > > Snapshot here: [image: enter image description here] > > > So, you guys see the big re

Re: [FFmpeg-user] named pipes ffmpeg

On 4/29/16, Robin Stevens wrote: > I am having trouble to get ffmpeg write to a named pipe in windows. I know > it's possible to write to a anonymous pipe with the command: > > ffmpeg.exe -vsync passthrough -f dshow -i video="AVerMedia SD 1 > Capture":audio="AVerMedia SD Audio Cap 1 (AVerM" -vcode

Re: [FFmpeg-user] Fwd: screen_capture_recorder to record 2nd monitor

You can unsubscribe here: http://ffmpeg.org/mailman/listinfo/ffmpeg-user HTH. -roger- On 4/27/16, G A wrote: > stop sending me this, goddamn this is 6th fucking time. > >> Begin forwarded message: >> >> From: Tim Hiles >> Subject: [FFmpeg-user] screen_capture_recorder to record 2nd monitor >> Da

Re: [FFmpeg-user] Blackmagic card issue capturing

full command line and uncut console output of failing run please? -roger- On 3/3/16, Christian Bianchini wrote: > Yes, by using vsync it works fine, who knows why.. maybe because I dont > capture audio. > > On 2 March 2016 at 16:12, Roger Pack wrote: > >> On 3/2/16, Chris

Re: [FFmpeg-user] Blackmagic card issue capturing

On 3/2/16, Christian Bianchini wrote: > I have ran with log level and this is the result when it successfully > capture at 60 FPS: > > frame= 153 fps= 61 q=0.0 size= 51752kB time=00:00:02.33 > bitrate=181487.1kbits > dshow passing through packet of type video size 4147200 timestamp 26343746 >

Re: [FFmpeg-user] Blackmagic card issue capturing

On 3/1/16, Christian Bianchini wrote: > I have got the ffmpeg version N-78598-g98a0053 and trying to capturing > from a Blackmagic card, which sometimes works and sometimes doesnt. > > ffmpeg.exe -y -f dshow -video_size 1920x1080 -pixel_format uyvy422 > -rtbufsize 2100 -framerate 59.94 -i "video=

Re: [FFmpeg-user] Any way to get better use of the cpu?

On 1/30/16, Carl Eugen Hoyos wrote: > Roger Pack gmail.com> writes: > >> ffmpeg -i input.ts -map 0:p:1344 1344.mp4 -map 0:p:1345 >> 1345.mp4 -map 0:p:1346 1346.mp4 > > Which encoder are you using? libx264 > You do know that this is not x264-feature-requests, don

Re: [FFmpeg-user] Capture Webcam to Broadcasting Program

On 2/16/16, James Stortz wrote: > ​Good day, > > I want to use my c920 in Wirecast on a Windows 8.1 desktop. > > (This was the line of webcams from Logitech that had notorious issues. A > thread pointed out FFmpeg support via DirectShow.) > > I can now successfully output--to video files! But, how

Re: [FFmpeg-user] [ffmpeg + screen-capture-recorder] - Targeting a specific Windows session with the command line ?

gdigrab has a "window" option FWIW On 2/2/16, JuliaM wrote: > Hi > > I'm using ffmpeg + screen-capture-recorder to record my own and student > work. > > For my situation, I use a Remote desktop to follow their work (to resume I > open/use an Admin session on the student computer while he's workin

Re: [FFmpeg-user] dshow: Multi channel Video Capture Cards for FFmpeg

It probably will be, if it has normal dshow interfaces (sorry for the late reply). On 10/19/15, Andrew Blake wrote: > Hello experts! > > Sorry i'm a bit of a newbie with ffmpeg so please bare with me! I'm trying > to convert multiple PAL video camera streams to images (16+ streams) ...and > I'm w

[FFmpeg-user] Any way to get better use of the cpu?

Hello. I'm attempting to decode and "re encode" live TV. I noticed that when I attempt to transcode say, 6 streams at a time, ffmpeg seems to end up using "at most" 50% of the cpu available on the given box. The basic syntax I'm using is ffmpeg -i input.ts -map 0:p:1344 1344.mp4 -map 0:p:1345 134

[FFmpeg-user] dvb_teletext -> .srt fails?

similar to https://lists.ffmpeg.org/pipermail/ffmpeg-user/2015-June/027029.html and https://trac.ffmpeg.org/ticket/3025 My "quest" is to convert an dvb_teletext stream to some human readable (ex: .srt) format. Ex: using this file: https://trac.ffmpeg.org/attachment/ticket/3025/sbs.2.5M.ts I do

Re: [FFmpeg-user] speed display during encode

On 1/12/16, Elliott Balsley wrote: > I realize that; I was merely asking if the display can be disabled > according to user preference. When using a narrow Terminal window, the > display is constantly overwritten, so this new change means a wider > Terminal window of 100 chars is required. I cou

Re: [FFmpeg-user] Capture Webcam and also display on screen.

I can think of two options, one is the "sdl out" filter, the other is to split your output and write to .jpg files (you can overwrite a single jpeg file) and display that as it changes. GL! Note there is no "sdl audio out" filter (as far as I'm aware). On 3/29/15, kevin wrote: > I need to captur

Re: [FFmpeg-user] Low latency H.264 streaming with ffmpeg

On 1/13/16, Greger Burman wrote: > Ok, so the ffmpeg based player is buffering frames somewhere even though > I'm telling it not to. This happens with h264 video but not with mjpeg. > That suggests to me that the latency is caused by either the h264 decoder > or the mpegts demuxer. I have also tri

Re: [FFmpeg-user] speed display during encode

On 1/11/16, Elliott Balsley wrote: > Sometime between July and December 2015, it seems ffmpeg has added a > "speed" display measured as a multiple of the framerate. Is it possible to > either hide this or hide the fps display? It seems redundant to show > both. I run ffmpeg in a script that sho

Re: [FFmpeg-user] Low latency H.264 streaming with ffmpeg

On 1/12/16, Kenneth Fields wrote: > yes, we’re having the same issue now. > but -benchmark also really degrades the stream. > Is there any options possible for -benchmark (moderate, strict)? what type of degredation? are you using udp? are you including audio?

Re: [FFmpeg-user] Low latency H.264 streaming with ffmpeg

On 1/12/16, Greger Burman wrote: > I would like to hear from anyone who has experience with low latency video > streaming and ffmpeg. > > In my application I take video from a PCIe capture device and stream live > over network. The end to end latency must be below 200ms otherwise it is > not usabl

Re: [FFmpeg-user] Mpeg PID vs. program id?

On 1/7/16, Andy Furniss wrote: > Roger Pack wrote: >> Hello. I'm trying to understand how MPEG mapping terminology works. >> >> Given this type of input: >> $ ffmpeg -i INPUT >> ... >> Input #0, mpegts, from 'INPUT': >>Duratio

[FFmpeg-user] flame about confusing command line options.

As a note, I just had to get this off my chest, and I'll only say this once. Some of FFmpeg's command line syntax is *confusing* and *super confusing* for beginners. For instance this: ffmpeg -r 30 -i input_file specifies a framerate *override* for the input, however if you specify it for the o

[FFmpeg-user] some containers require "monotonically increasing" RAM expected or leak (mp4, nut)?

Hello all. I noticed when doing some test to isolate memory leaks that the following commands "grow monotonically" (RAM size required) however valgrind doesn't report any leaks. I presume this is expected? ** nut container size grows over time: ./ffmpeg -f lavfi -i color=c=red:size=40x40 -vcod

Re: [FFmpeg-user] null video sink

On 12/29/15, Nicolas George wrote: > Le nonidi 9 nivôse, an CCXXIV, Roger Pack a écrit : >> Could anyone be kind enough to show me how to use this in a filtergraph? >> When I try to, it seems to still output and encode: > >> Stream mapping: >> Stream #0:0 (h264)

Re: [FFmpeg-user] EPG stream

On 9/7/15, Carl Eugen Hoyos wrote: > Mitja Pirih alternet.si> writes: > >> What are my options for EPG with ffmpeg? > > EPG is not yet supported, patch welcome! I'd also like it (at least output it to the console or something?) I could provide a sample file that contains EPG in it :) -roger- __

[FFmpeg-user] null video sink

Hello. I noticed the docs for the "null" video filter say: https://ffmpeg.org/ffmpeg-filters.html#nullsink Null video sink: do absolutely nothing with the input video. It is mainly useful as a template and for use in analysis / debugging tools. Could anyone be kind enough to show me how to use thi

[FFmpeg-user] ffplay with "-map" possible?

Hello. I have an MPEG incoming stream: Input #0, mpegts, from 'dshowbda:video=Hauppauge WinTV 885 BDA Tuner/Demod': Duration: N/A, start: 8801.945367, bitrate: N/A Program 1 Stream #0:0[0x41]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 1280x720 [SAR 1:1 DAR 16:9], Clos

Re: [FFmpeg-user] help with live capture and audio sync issues

I'm almost tempted to come up with a "sync" filter (unless one already exists) that would force things back into sync (live streams that is) On 9/3/15, Ricardo Kleemann wrote: > Hi, > > I have very inconsistent results with doing live capture. Sometimes the > resulting file has perfect audio sync

Re: [FFmpeg-user] FFMPEG LIVE MICROPHONE CAPTURE-STREAM WINDOWS PC

On 12/14/15, Nick LaCommare wrote: > All, > > Looking for a way to capture a windows PC's default recording device and > transcode it to MP3 audio and stream via UDP to a Barix box that only > accepts MPEG1/MP3 audio. > > Below are 2 examples I have tried with no success. The audio is heard on the

Re: [FFmpeg-user] DShow and Crossbar support for device name?

> v[dshow @ 00432180] DirectShow video devices (some may be both video and audio devices) [dshow @ 00432180] Could not enumerate video devices (or none found). Do other programs use it OK? What type of device *is* it in dshow land, I wonder... On 11/9/15, Andrew Blake wrote: > Hi

Re: [FFmpeg-user] Screen-casting - RTSP - VMIX

On 8/21/15, Bilarus T wrote: > Hello FFmpeg community > > I'm trying over 2 months to successfully use FFmpeg to stream locally my > desktop to VMIX but without success and it is getting me insane > > I'm using screen-capture-recorder to capture at 60fps in 1080p > > I have searched the whole web

Re: [FFmpeg-user] ffmpeg serving to Avisynth

On 9/12/15, Francois Visagie wrote: > Hi, > > > > I hope to reach an expert familiar with both ffmpeg and Avisynth! I’m > looking to perform some processing in ffmpeg, and then to continue in > Avisynth. For a number of reasons, including disk space, I’d like to avoid > intermediate files. Which,

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