Can I record only the computer system sound and save it as MP3?
Not only video recording, but audio recording is also now supported.
You can record through the following simple steps.
In the oCam main window, click the Sound tab at the top.
Then the mode is changed to audio recording.
In this state, when you click the Record button, system sound is recorded instead of screen recording.
Then click the Codec button as shown below to set which audio file type to save.
(Currently, MP3, WMA, FLAC, and M4A extensions are supported.)
1. MP3 (MPEG-1 Audio Layer 3)
- Features: MP3 is the most widely used audio compression format, developed in the 1990s.
- Compression method: It uses lossy compression, which greatly reduces file size.
- Sound quality: Some audio data is lost during compression, so quality may drop compared to the original. However, at 192 kbps or higher, most users may not notice a clear difference.
- File size: About 2.4 MB per minute at 320 kbps, which is relatively small.
- Compatibility: It is supported on almost all devices and software, making it suitable for streaming, downloading, and playback.
- Use case: Commonly used for portable music players, online streaming, and everyday music listening.
2. WMA (Windows Media Audio)
- Features: An audio format developed by Microsoft, designed as an alternative to MP3.
- Compression method: Supports both lossy and lossless compression modes.
- Sound quality: Claimed to provide better quality than MP3 at the same bitrate, though the actual difference is often minimal. Lossless WMA preserves original audio quality.
- File size: Similar to MP3 in lossy mode; in lossless mode, files are much larger (about 10~20 MB per minute).
- Compatibility: Strong support in Windows environments, though compatibility may be weaker on other platforms such as macOS or some Android devices.
- Use case: Mainly used in Windows-based software and Microsoft products such as Xbox; DRM support makes it suitable for protected content distribution.
3. FLAC (Free Lossless Audio Codec)
- Features: A popular lossless audio format among audiophiles.
- Compression method: Uses lossless compression, preserving 100% of the original audio data.
- Sound quality: Provides original-quality audio with no loss, suitable for high-resolution playback.
- File size: Much larger than MP3, but about 50~70% smaller than the original WAV file (roughly 20~30 MB per minute).
- Compatibility: Supported by most advanced audio players and software, but may be difficult on some low-spec or older devices.
- Use case: Suitable for high-quality music listening, audio archiving, and studio work where preserving quality is important.
4. M4A (MPEG-4 Audio)
- Features: An MPEG-4 based audio format mainly used by Apple, including AAC (Advanced Audio Coding) and ALAC (Apple Lossless Audio Codec).
- Compression method: Supports lossy AAC and lossless ALAC.
- Sound quality: AAC is more efficient than MP3 and often provides better quality at the same bitrate. ALAC preserves original quality as lossless.
- File size: AAC is similar to or slightly smaller than MP3 (about 2 MB per minute), while ALAC is similar in size to FLAC (about 20~30 MB per minute).
- Compatibility: Strongly supported on Apple devices (iTunes, iPhone, iPad) and macOS; some Android devices or other platforms may require additional codecs.
- Use case: Mainly used in iTunes, Apple Music streaming, and podcasts, with AAC suitable for streaming and efficient storage.
Additional tips
- If you prioritize quality: choose FLAC or M4A (ALAC).
- If you prioritize file size and compatibility: choose MP3 or M4A (AAC).
- In Windows environments: WMA is also a good option, but MP3 may be more universally compatible.
- For Apple device users: M4A is most suitable, and AAC is especially good for streaming and saving storage.
Today's News/Tips
What Are Codecs and Digital Container Formats?
When using oCam normally, you do not need an in-depth understanding of codecs and digital container formats. However, if you want to use oCam's extended features or optimize your recording settings, it is useful to understand these two terms. Below is an easy explanation of codecs and digital container formats, focused on how they relate to oCam.
* What is a digital container format?
A digital container format refers to familiar file extensions such as AVI, MP4, MOV, and FLV. It is a meta file format that defines the structure for storing video, audio, and metadata (for example, subtitles and time information) together in a single file. Simply put, you can think of a container format as the framework of a file structure that determines how video and audio data are stored.
For more information, see Wikipedia:
https://en.wikipedia.org/wiki/Container_format
For example, if a file is an AVI file, the container format is AVI, and the video and audio data inside that file are stored according to the structure defined by AVI. A container format acts like a "container" that holds the data, while the actual method used to encode the data is determined by the codec.
* What is a codec?
A codec is hardware or software that performs encoding and decoding. It includes algorithms for compressing data, decompressing it, or converting it into another format. In oCam, codecs are used to convert screen video data into a video file and to generate audio data. The generated data is then saved according to the digital container format selected by the user.
For more information about codecs, see Wikipedia:
https://en.wikipedia.org/wiki/CodecSimply put, a codec is a tool that compresses and converts video or audio data so it can be stored or played back efficiently. Common codecs used in oCam include XVID, MPEG-1, MPEG-2, MPEG-4, and H.264, while common audio codecs include MP3 and PCM.
* Codecs and container formats in oCam
In oCam, a codec is used to encode video and audio data in order to convert screen recording data into a video file. This encoded data is then saved as a file in the digital container format selected by the user, such as AVI or MP4. For example:
- If the file extension is AVI, the container format is AVI, and the video data inside may be encoded with H.264 or MPEG-4. The audio data may be saved as MP3 or PCM.
- In the case of an MP4 file, the container format is MP4, and it may similarly contain video encoded with H.264 and audio encoded with MP3.
* Summary
In oCam, the digital container format is the framework that defines the file structure, such as AVI or MP4, while the codec is the method used to compress and convert the video and audio data inside it, such as H.264 or MP3. oCam's default settings are enough for high-quality recording, but depending on your specific purpose, such as optimizing file size or improving editing compatibility, adjusting the codec and container format can make your workflow more efficient. If needed, try selecting the codec and format you want in oCam's codec settings menu.