Bandi Capture LibraryBandi Capture Library

FAQ [Expand all][Collapse all]

There is no sound at all in captured video file. The sound is too small in captured video file.

According to recording setting, sound recording sound is none or very small. Set the property as shown below.

Select volume control in system tray.

If not shown, go to Start->Settings->Control panel->Sound and audio devices, and find "Place volume icon in the taskbar" checkbox to show the tray icon.



 

Select property window in volume control.



 

Select "Recording" in "Adjust volume for" category and Select "Stereo Mix" in "Show the following volume controls" and press "OK" button.



 

Recoding control window appears. Check "Select" in "Stereo Mix" category, and set proper volume. Finally, close the recoding control panel.



 
I can't find Stereo Mix in volume property. I use SoundMax HD Audio.

Some SoundMax HD Audio device can't support Stereo Mix. This device can not support any sound recording software.

When running examples, "This application has failed to start because d3dx9_xx.dll was not found." message occurs.

Please copy 'd3dx9_xx.dll' files from D3DX SDK to C:\BCL\bin folder and run it again.

When Running the example "Failed creating the Direct3D device." messages occurred and don't run.

Examples are derived from 'DirectX SDK Sample' - ShadowMap example. It requires specific 3D acceleration functionality (ex. 3d lighting. specific surface capability etc.) So if your hardware is not compatible to this specification, it fails to run. But BCL don't requires specific 3D acceleration to capture video file.

I want to release my program, what are the files in my installer?

release with bdcap32.dll, bdcore32.dll, vcomp90.dll is in the same directory where your application is installed.

from 1.2 version only bdcap32.dll is needed.

If I purchase, can I use it to other application?

Our licensing policy permit only 1 title per 1 license. If you released a new "game1" and will release "game2", you must purchase another license for the new game. Please contact us for any question about pricing and licensing policy. support@bandisoft.com

If BCL is updated, can I use the updated BCL library?

If purchased, You can use the updated version or the old version by your choice.

I use USB sound card. I can't capture audio track.

USB sound card can't support sound capture. Change sound device to internal AC97 device and try again.



 
How can I see the encoded video information?

Download below software. It shows the media information.

• Download MoviReader.exe: MoviReader.exe(0.1MB)
• MediaInfo: http://mediainfo.sourceforge.net
What is MPEG1 video codec?

BCL supports MPEG1 video codec from version 1.2. This codec is default codec to encode video stream.

It has many excellent features.

• because MPEG1 codes is ISO/IEC standard, many video players and converters such as ffmpeg supports MPEG1 codec. Also many UCC provider support MPEG1 codec.
• It's performance is much better than other codecs such as MJPEG. It compress video files maximum 5 times better compression rate than MJPEG codec.
• It has no license fee. The patent license of MPEG1 is already expired. So anyone can use it with commercially or un-commercially for free.
What is MP2 audio codec?

BCL supports MP2 audio codec from version 1.2. This codec is default codec to encode audio stream.

Below shows the features of this codec.

• because MPEG1 codes is ISO/IEC standard, many video players and converters such as ffmpeg supports MPEG1 codec. Also many UCC provider support MP2 codec.
• It's performance is well balanced between compression rate and performance. It is better than PCM raw wave audio in size, and less CPU usage than MP3 codec.
• It has no license fee. The patent license of MP2 is already expired. So anyone can use it with commercially or un-commercially for free.
What is MJPEG codec?

It is the same as JPEG picture. only Each frame of motion picture is encoded to one JPEG picture.So one MJPEG video file is composed of many JPEG pictures. Everyone can use it freely because the Patent license is expired. But MJPEG codec only compress spatial information - it is developed for still pictures - , it's performance is not good to encode video. Each frame of MJPEG video is not dependent on other frames, It used in video editing software.

What is MPEG4 video codec?

MPEG4 video codec has been supported until BCL version 1.1 . But it isn't supported any more because of the licensing problem. The MPEG4 algorithm in BCL is a simplified version to achieve a less cpu usage. From BCL version 1.2, MPEG1 codec becomes default capture codec. It works more efficient in capture on some circumstance.

If you want to use MPEG4 VISUAL codec, refer to MPEG LA which owns MPEG4 LA license.

External link: mpeg4faq

Frame rate is fixed to 30 fps when video capture is activated.

BCL limits frame rate to encode a better quality video. It ensures BCL to encode video file seamlessly. But it can be controlled by IBandiCapture::SetMinMaxFPS() interface. See Help to find more information.