![]() If you want a particular file size, use 2 pass encoding while specifying the desired file size/bitrate.Ĥ.5GB might be a bit optimistic for a 720p video over four hours long, but you never know. Therefore, you'd use the constant quality mode when you want to set the quality, in which case the bitrate required is unknown, or you'd specify a bitrate for a 2 pass encode and the quality becomes the unknown. ![]() ie If you run a constant quality encode, check the resulting bitrate, then use that bitrate for a 2 pass encode, the two encodes will be virtually the same. For x264 encoding, the video will be encoded the same way when using constant quality encoding as it is for 2 pass encoding, assuming the bitrate is the same each time. For a given quality setting (ie Handbrake/Vidcoder's constant quality) the bitrate will vary considerably from video to video according to how hard it is to compress. ![]()
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