What are codec and digital container format?
What are codec and digital container format?
Although you generally do not need to understand these two terms to use oCam, you should know them if you want to use the extended functions in oCam.
Codec and digital container format have multiple meanings, but here we explain only the meanings used for oCam.
First, a digital container format refers to common container formats such as AVI, MP4, and MOV.
Wikipedia has more detailed explanations.
A container format, also called a wrapper format, is a metadata file format that defines how different data components can coexist within a computer file.
In simpler words, AVI, MP4, MOV, FLV, and similar formats refer to the file structure that determines how video or audio data is stored.
And the data stored in that container is related to codecs.
The definition of a codec is described in Wikipedia as follows.
http://ko.wikipedia.org/wiki/%EC%BD%94%EB%8D%B1
A codec (short for coder-decoder) is hardware or software that can encode and decode, or both, a data stream or signal. It also refers to the algorithm used to do so. In telecommunications, the term originally referred to sender and receiver devices, known as a โcoderโ and โdecoder,โ which originated in 1980s America.
A codec includes software that compresses or decompresses data using compression functions, or devices and software that convert media such as sound and video into different formats.
To explain more simply, in current oCam usage, codecs are used to encode screen data into video, generating encoded video and audio data, and this data is saved as a file according to the container format selected in oCam.
Examples of codecs that we commonly know are XVID, MPEG-1, MPEG-2, MPEG-4, and H264.
For example, if there is a file with an AVI extension, then the digital container format is AVI, and the stored video and audio are saved using the AVI-defined structural format.
At that time, the stored video data may be H264, MPEG-4, and so on, while the audio data may be MP3, PCM, etc.
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The "The endpoint device is already in use." Error Appears When Recording Starts
When recording with oCam, you may sometimes encounter problems with sound recording. In particular, when a DAW (Digital Audio Workstation, for example FL Studio) program using Asio4all is running, it may take exclusive control of the system audio, making sound playback or recording unavailable in other programs. As a result, normal sound recording in oCam may become difficult. Below is a detailed explanation of how to solve this problem and record smoothly with oCam.
Asio4all is a driver used for low-latency audio processing and is mainly used in DAW programs. However, when Asio4all is enabled, it takes exclusive control of the system audio, so other programs such as oCam may not be able to capture system sound. To solve this problem, you need to change the audio output device in the DAW program to something other than Asio4all.
The following is how to change the settings:
1. Run the DAW program (for example, FL Studio).
2. In the case of FL Studio, click 'Options' in the top menu, then go to 'Audio Settings'.
3. In the 'Audio Settings' window, check the audio output device and change it from Asio4all to 'Primary Sound Driver' or 'DirectSound'.
4. After saving the settings, play audio in the DAW and then try recording with oCam. The system sound should then be recorded normally.
If you must use Asio4all because of latency issues with a MIDI keyboard, it is best to switch the settings flexibly depending on your working environment. For example:
- When producing music or doing MIDI work in the DAW, use Asio4all to maintain a low-latency environment.
- After finishing your work and when you want to record with oCam, change the playback device in the DAW audio settings to 'DirectSound' or 'Primary Sound Driver' to disable Asio4all.
- After changing the setting, restart the DAW, or reboot the computer if necessary, then confirm that the setting has been applied properly before starting recording with oCam.
Using this method, you can resolve the audio exclusivity issue caused by Asio4all and record system sound smoothly in oCam. If you are working in a DAW and recording at the same time, try switching the audio output device according to the situation to maintain the best environment.