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8th May 2023, 04:11 | #1 | Link |
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IP BP Ratios - Hurt Iframe Quality?
Hi,
If you go below 1.0, like ipratio=0.90, pbratio=0.90, does this hurt iframe quality? Or a different question is, does this allow more data to be pushed into p and b frames. And yes it lowers iframe quality, but allows a much higher quality of p and b frames? Another thought I've had is, does lowering beyond 1 hurt reference frame quality? Or does using P and B frames as reference frames clear up that issue? My thought here is to shift some of the data hog that an iframe represents and push slightly higher into p and b frames because they offer much high compression. And with x265, p and bframe quality is exceptionally good. Thanks |
17th May 2023, 18:29 | #2 | Link | ||||
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24th May 2023, 13:28 | #3 | Link |
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I understand the ranking of the frame types, but how far are the gaps between each ranking, which is more important to focus on? When encoding something, and it gives out QP values in my log, if we're targeting something near transparent, would we want the the P-frames closer in QP value to the I-frames, or the B-frames closer in QP value to the P-frames, or should their numerical QP value gap be equal in both directions? Or that something that would change based on the source-type? Like would grainy movies would be better to have similar gap sizes, and animation would be better to have a larger gap between B and P, and smaller between I and P? Or vice-versa
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26th May 2023, 02:25 | #4 | Link | |
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Generally --ipratio will be lower than --pbratio. |
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