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Quality difference when changing bitrate

 
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jnhs



Joined: 02 Dec 2004
Posts: 1
Location: Australia

PostPosted: Thu 2 Dec 2004, 22:46    Post subject: Quality difference when changing bitrate Reply with quote

I understand that reducing the bitrate below 8mbps when rendering an mpeg video file will reduce the play back quality, but I have tried it at 4mbps and can see no visible difference.

Does anyone have any specs on how much quality you loose when you reduce the bitrate to 2 or 1mbps?
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RMN
Site Admin


Joined: 04 Feb 2003
Posts: 587
Location: Lisboa, Portugal

PostPosted: Thu 2 Dec 2004, 23:58    Post subject: Reply with quote

How do you measure "quality"? And anyway, the quality of a certain clip will also depend on what kind of footage it is. Complex images (ex., camera travelling through a jungle) need a high bitrate to look good, while simpler images (ex., static camera aimed at the sky) can get by with pretty low bitrates. That's why, for big projects, it's always best to use the 2-pass variable bitrate mode (that whill analyse the footage and decide how to distribute the bitrate along the movie).

RMN
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