I tried to record a video with Camtasia Recorder, but got this error:
Camtasia (Windows): We're Sorry! There Was a Problem with Your Recording File
The file has no audio or video. How do I fix this?
The problem is usually with the sound device.
Unplug every recording device except the one you're using. So if you have a studio mic AND another mic (such as a webcam), unplug the other one.
Go to the Camtasia settings and change the recording format. PCM works but another may work for you as well.
Close an reopen Camtasia. Make sure the right recording device is selected. It should work now.
Related
This driver (https://github.com/Microsoft/Windows-driver-samples/tree/master/audio/sysvad) is provided by Microsoft. And in its README, the last part, it says:
Locate an MP3 or other audio file on the target computer and
double-click to play it. Then in the Sound dialog box, verify that
there is activity in the volume level indicator associated with the
SYSVAD (with APO Extensions) driver.
But in my target computer, the volume level indicator associated with the SYSVAD (with APO Extensions) driver does not change at all. And the target computer does not make any sound.
The same case to the mic, when set default mic to any of the sysvad mic array, the mic volume level will not change at all.
In my understanding, sysvad driver is virtual driver. So it will not really work. But why Microsoft README says: there is activity in the volume level indicator associated with the SYSVAD (with APO Extensions) driver.
The SYSVAD documentation leaves a lot to be desired. You won't see any activity in the volume level indicator, and you won't hear anything, since the only thing the rendering endpoints do is save a copy of the audio output to file (look for C:\STREAM_HOST_*.wav files).
The capture endpoints (including the "loopback" pins) generate constant sine-wave signals, which you can see if you use an app to record them, and then view them in a sound editor/viewer or play them back out to a real device.
I am working on SysVad too and sure it works, for Mic you can test with vlc player
Try to open the virtual mic from VLC and then you will hear sound, it's a sin wave generated by driver itself
This issue is related to playing media in Firefox. While trying to stream audio after moving workstations, I get the following error in the console:
Media resource [...] could not be decoded [...] NS_ERROR_DOM_MEDIA_MEDIASINK_ERR (0x806e000b) Details: OnMediaSinkAudioError
In this case, it's not down to the website setup or contents of the audio stream, as they were working before.
Searching online for OnMediaSinkAudioError or NS_ERROR_DOM_MEDIA_MEDIASINK_ERR only seem to turn up with code commits or repositories for Firefox itself, so this doesn't appear to be a common problem.
It turns out that in this scenario, the error is quite misleading, since it is caused by a misconfiguration of the Windows audio output device.
After swapping my headphones from the rear audio ports to the front and restarting the workstation, everything worked fine. Restarting Firefox may have also been sufficient.
I had the same problem more than once, this time after showing the Console (on Soundcloud) I saw the NS_ERROR_DOM_MEDIA_MEDIASINK_ERR error logged and googled it to find this SO question. What fixed this issue for me was the 1st solution at drivereasy (restarting the Windows Audio service), without even restarting Windows or Firefox.
Hold Down Windows logo and press R key. A Run dialog box will pop up.
Type services.msc in the run box and click OK button.
In right Services Window, find Windows Audio from the “Name” list and right-click on it. Click Restart in the pop-up menu. Then the audio service will restart.
A cmd oneliner would be net stop AudioSrv && net start AudioSrv, run as Administrator.
If you are using VS CODE Live Server extension, Javascript Audio() won't play sound. Try running the site without the extension.
I was receiving the similar error (Media Resource xxx could not be decoded.) in Firefox 46.0.1 and it turns out, the browser does not support .wav files, it worked fine with mp3 audio files.
I had to use embed element with type="application/x-mplayer2" which triggered vlc component to play the file. We were okay with this work around as we only use this website internally and had to stick to older version of Firefox for some reasons.
Though, the audio wav files worked fine in Google Chrome and Mozilla Firefox latest versions.
I have a video device that exposes an MJPEG stream via a URL. For windows there are utility apps that can "create" a system webcam device useable by Skype or any other application based on the URL this video device exposes.
Example: smart phone is broadcasting MJPEG URL. Windows computer can run a utility app to "create" a system webcam based off of the MJPEG stream and then that webcam be used via Skype. The video shown is what the phone is broadcasting.
I'm trying to do the same but for my Mac. I can't seem to find any utility that creates a system webcam from an MJPEG stream. Googling isn't helping either, I'm just not finding a solid solution or anything I recognize as a solution.
Thanks!
I've had success with obs-studio and its vlc and virtual camera plugins.
You can add a "Vlc Video Source" and then click "Start Virtual Camera".
If you want to use it as a web-cam I just recommend that you reduce the "Network Caching (ms)" setting in the vlc video source settings as much as possible.
The hard-coded minimal value is 100ms, you can reduce it by changing this line: https://github.com/obsproject/obs-studio/blob/7217671eb0812681a9f83858bb02065b671673e7/plugins/vlc-video/vlc-video-source.c#L1079
There is still significant delay with this method regardless, but it's better than not having it working at all.
I am trying to use Apple's RecordAudioToFile and MyRecorder examples. The first example runs well and the file is recorded but I can't hear any sound. And the second example, when I press the Start button, it does nothing. I'm using a Mac Mini to record.
I am developing an application which access my audio input device and record audio from my microphone.
Here when i am pressing START button it have to record audio from microphone and have to stop recording when pressing STOP button.
My device is Lynx-AES16 and i got driver from there site.
In windows i am accessing the machine(Lynx) by using direct-show SDK(Graph edit).
Is there any similar tool like direct-show is available. I checked with AUAudio and IOkit but didnt understood that much.
Can anyone provide some sample or some useful links. Apple link is not good for a starter
Look at the CoreAudio sample code at developer.apple.com. There is plenty of useful code there.
In particular look at the RecordAudioToFile example.