Questions tagged [directshow]

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Is it possible to use libdshowcapture with ffmpeg?

libdshowcapture is OBS' directshow screen grabber library Currently the ffmpeg dshow input also relies on 3rd party software (uscreencapture, sharex and possibly others) The integrated screen capture ...
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How to specify video standard (PAL/NTSC) using FFmpeg with dshow device on Windows?

Trying to use FFmpeg to stream from various analog cameras, using a USB video grabber. On linux, using the video4linux2 input device (v4l2), it is possible to specify the video standard, e.g. PAL (or ...
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webcam does not report higher resolutions on windows-10

BRIO 4K Stream webcam does not report higher resolutions on windows-10-pro machine while on windows-10-home machine everything works ok. Any idea how to troubleshoot this issue ? What i have tried ...
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Using ffplay to preview a USB webcam using DirectShow under Windows 10 gives black screen

When using ffplay to preview a USB webcam using DirectShow filter under Windows 10 Pro gives black screen. Tried CamDiag32 and CamDiag64, both shows quartz.dll missing but it pop an "access denied ...
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2 answers
898 views

How can I make SDL output displaying with audio stream in ffmpeg?

Learning ffmpeg, I tested SDL output by the code below. I noticed that video played well but no audio. ffmpeg -re -i INPUT -vcodec rawvideo -pix_fmt yuv420p -window_size qcif -f sdl "sdl out" there ...
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2 answers
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FFMPEG Directshow Multiple Audio Capture

Is it possible to capture multiple audio devices using ffmpeg dshow? I am trying to capture my desktop using gdigrab along with mic and speaker audio using dshow. I have tried using the following ...
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938 views

Nvidia Grid SDK / Capture SDK

I am trying to set-up grid for capturing OpenGl rendered screen, encoding it and streaming it on remote system. I searched for available options and realized that Nvidia capture SDK (formerly GRID ...
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Where can I find DirectShow plugin that VLC needs?

On my previous attempt to record both video and audio 'from the desktop' only the sound portion was recorded. I suspect that the problem lies here, in the absence of a DirectShow plugin. (I couldn't ...
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702 views

ffmpeg for windows (directshow). Where to specify options?

I think I've tried every conceivable permutation, but all I get are syntax errors. I found this example: ffmpeg -f dshow -i video="screen-capture-recorder" -f dshow -i audio="virtual-audio-...
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DirectShow video capture as MPEG-4, with FFmpeg

When using the FFmpeg dshow module, MJPEG is used as data from the webcam. Input #0, dshow, from 'video=Logitech HD Pro Webcam C920:audio=CABLE Output (VB-Audio Virtual Cable)': Duration: N/A, ...
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DirectShow error causing non function WebCam

Recently, I found out none of my application can detect my webcam anymore (which works without any issue before). I have tried to reinstall the webcam driver and my device manager can see my webcam ...
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6k views

Windows 10 DirectShow Crash

After recently upgrading to Windows 10 (recently, as in a couple months back), I've encountered a few problems with Windows 10. One of which is the DirectX DirectShow component. When running 'dxdiag', ...
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How to fix missing Media Foundation Microsoft AAC Audio Decoder Transform MFT Windows Server 2k8r2 sp1

I have a Windows Server 2008R2 SP1 VM that has somehow lost its Media Foundation AAC Transform. I discovered this when certain .MOVs with AAC streams were not behaving as expected. I opened TopoEdit ...
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FFMPEG DirectShow: Could not run filter

I'm trying to take a picture from my webcam using FFMpeg. This is what I'm trying to run: @echo off :: Get date and time for /F "usebackq tokens=1,2 delims==" %%i in (`wmic os get LocalDateTime /...
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Record webcam automated with unknown duration

I need to record (not stream) from my webcam, convert it to H.264 and store it in a mp4-container. With VLC media player I can do this manually with the Open Capture Device menu where I just have to ...
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2 votes
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VLC output to DirectShow

I have a playlist of video files in various formats (which VLC will happily play while others choke on some of them). I have another program which will only accept as input a DirectShow Source device ...
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VLC DirectShow capture to use default audio device

I need to capture audio with VLC from the default capture device set for the system in Windows. If I set the audio device in the capture dialog to "Default", it seems to capture from the first audio ...
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Localized directshow device names

On my computer device list obtained by ffmpeg looks following: Two devices before end named with garbage symbols. It is impossible to use these devices directly. How to use them then? UPDATE ...
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The sound is periodically "dying" when capturing with ffmpeg + directshow

I am trying to capture video and sound with the following command ffmpeg -f dshow -r 15 -i video=screen-capture-recorder:audio="Desktop Microphone (2- HD-5000 - Microsoft LifeCam.)" -acodec mp3 -...
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3 votes
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Windows lists the wrong Directshow Audio Capture Devices

Some time ago the directshow audio capture devices on my Win7 machine stopped updating. For example ffmpeg -list_devices true -f dshow -i dummy lists devices that have been uninstalled already and ...
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1 answer
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Audio plays in GraphEdit but not WMP

I have trouble with only one file format. I can play my files just fine in GraphEdit and GraphStudio, but WMP absolutely refuses them. In typical Microsoft fashion, it gives no helpful error. In fact ...
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1 answer
1k views

DirectShow capture devices disappear while connected with Remote Desktop

I use an excellent videosurveillance Windows app named Blue Iris that saves audio/video from 4 USB webcams + 1 IP cam. All the 5 cams have integrated microphones. For the IP cam, the app receives and ...
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1 answer
2k views

How to view the filter graph used by Windows Media Player

i have a video that i cannot render in Graph Edit: GSpot cannot render: and AVISynth's DirectShowSource cannot open: And yet Windows Media Player (12) can play it fine. How can i figure out the ...
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1 vote
1 answer
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vlc dshow:// how to limit playback time

I want to use VLC media player to record from an USB TV receiver. I would like to schedule when to record, but calling vlc from the command line: vlc -Idummy dshow:// --sout=#transcode{vcodec=mp2v,...
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2 votes
2 answers
1k views

Windows media scaling/interpolation method

Usually in Windows, if videos or other media is upscaled from a certain resolution to a higher resolution (e.g. "monitor size"), a bilinear filtering algorithm or similar is used, such that the ...
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4 votes
4 answers
7k views

Is there a VirtualDub alternative which works with DirectShow filters?

The question says it all: I'm looking for a VirtualDub alternative which can work with video files if there's only a DirectShow filter available (and not a VFW filters as VirtualDub requires)
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2 answers
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Using DirectShow filters in Windows 7 instead of Windows Media Foundation

I have started using the RC1 version of windows 7, and I noticed that for playing videos, Windows 7 does not use ffdshow after I installed it. I narrowed down the issue to the fact that Windows 7 ...
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