![]() ![]() Based on your need of file size, HandBrake will calculate the proper bitrate on the basis of formula above. So if you have limited HDD storage or nearly run out iPad, iPhone space, choose Target size option. Video size (kb) = bitrate (kbps)/8 x duration (second). Target size is just the flip-side of average bitrate. Advised HandBrake constant quality RF setting 3. Or consult the RF advice directly from the HB interface (shows as below). Go there for more detailed info if needed. BTW, the above RF data refers to HandBrake official document. Plus or minus 1-2 RF is usually noticeable. RF 18-22 for 480p/576p Standard Definition1ĭo NOT adjust RF value too much do it in small scale.Recommended constant quality settings for x264 and x265 Check to know the reasons why say in details if you're interested. ![]() Yet, compared with ABR, Constant Quality has overwhelming advantages over Avg bitrate, faster encoding, same quality as 2-pass encoding and smaller file size. Because it takes a different bitrate to reach a given quality level for any given part of any movie, the output size is unpredictable and varies from source to source. Handbrake Constant quality mode does the opposite you specify a quality level and HandBrake adjusts the bitrate to meet it. With the average bitrate method, you know exactly the file size but lose control of video quality. Adjust HandBrake Constant Quality (RF) Value for Better Quality & Smaller Size How to set HandBrake for X265 videos > 2. So you still need to make choices in accordance with actual situation. It can be applied to majority of video codecs, but not all of them. But take note that, this HandBrake Video Quality Setting formula is just approximately empirical formula. You can compute the approximate bitrate in accordence with the video codec you chosen and the file size you preferred. You'll notice that it is not so difficult as thought before. Note: Different video codec has diverse K value (H.264 k=0.012345, MPEG-4 k=0.0135), and R depends on the quality you desired (excellent r=1.0, good r=0.55, normal r=0.35). No biggie! See the specific video bitrate calculating formula: Bitrate=output width * output height * k * r It would be a rocket science for ordinary users to manually set the HandBrake average bitrate value, for they don't have any clue on the specific bitrate corresponding to the different video resolution. Secondly, manully set the specific average bitrate value: In most cases, this image quality loss is minimal and not perceived by the viewer. ![]() The "Turbo first pass" option will make the first pass quicker at the sacrifice of quality.Certainly, it will cost your time as long again as single-pass encoding. You're strongly recommended to use 2-Pass encoding to ensure better bit-rate distribution and better quality. ![]() When you really need a target file size for your HDD space, go to Avg Bitrate. Calculate HandBrake Average Bitrate with Better Quality Yet, how to calculate average bitrate for your standard video (480p) or high definition video (720p, 1080p, even 4K 2160p) and adjust constant quality RF value? All your doubts get answered below with specific data: 1. To make a balance between video quality and file size in Handbrake, the major approaches you can rely on are Handbrake average bitrate and constant quality (RF), alongside with Target Size. How to Calculate HandBrake Bitrate & Adjust Constant Quality (RF)
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