Video/audio data rates for avi files

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In summary, video and audio data rates for avi files refer to the amount of data used to represent one second of video and audio respectively. Higher data rates result in better quality but also larger file sizes. Recommended data rates vary depending on resolution, frame rate, and audio specifications. It is possible to adjust data rates after creation, but this may lead to quality loss or larger file sizes. Other factors that can affect data rates include the codec used, video length, and audio complexity.
  • #1
Pengwuino
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Ok something is confusing me, I have this file here...

.avi

102,892 KB size
640x480
11m:36s

Audio:
Bit rate: 127kbps
MPEG Layer-3

Video:
23 frames/econd
147kbps
24bit
XVID Compression

Now I'm kind of confused... I calculated the overall data rate to be 1200kbps or so... yet those only seem to add up to 300kbps... how are you suppose to calculate this stuff?
 
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  • #2
audio or video rate?
 
  • #4
Yah it doesn't add up dduardo :) The video should have been 1200kbps using the real size and time but the two bit rates don't add up to that.
 

1. What is the difference between video and audio data rates for avi files?

The video data rate for an avi file refers to the amount of data that is used to represent one second of video footage. This is typically measured in kilobits per second (kbps) or megabits per second (mbps). On the other hand, the audio data rate refers to the amount of data used to represent one second of audio, which is measured in kilobytes per second (kbps) or kilohertz (kHz).

2. How do video and audio data rates affect the quality of an avi file?

The higher the video and audio data rates, the better the quality of the avi file will be. This is because a higher data rate allows for more information to be captured and stored, resulting in a higher resolution and better audio clarity. However, a higher data rate also means a larger file size.

3. What is a recommended video and audio data rate for avi files?

The recommended data rates for avi files are dependent on the resolution and frame rate of the video, as well as the audio sample rate and bit depth. Generally, for standard definition video, a data rate of 5-10 mbps for video and 128-192 kbps for audio is sufficient. For high definition video, a data rate of 20-30 mbps for video and 256-320 kbps for audio is recommended.

4. Can the video and audio data rates be adjusted after the avi file has been created?

Yes, it is possible to adjust the video and audio data rates of an avi file after it has been created using video editing software. However, this may result in a loss of quality or increased file size. It is best to set the data rates correctly during the initial creation of the file.

5. Are there any other factors that can affect the video and audio data rates of avi files?

Yes, there are several other factors that can affect the data rates of avi files, such as the codec used, the length of the video, and the complexity of the audio. Different codecs may have different data rate requirements, longer videos may require higher data rates to maintain quality, and audio with multiple channels or effects may also require higher data rates.

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