For those that are not, software like Handbrake exists. ffmpeg is very well documented, but is intended for those who are comfortable with using it. But keep in mind, hardware encoders do have limitations no matter what you try.Įverything seems so unclear for such a typical task.Ĭommand line software. You can use this setting to increase quality. Lookahead improves the video encoder’s rate-control accuracy by enabling the encoder to buffer the specified number of frames, estimate their complexity, and allocate the bits appropriately among these frames proportional to their complexity. The intent here is create better quality videos. This setting slows down the encoder due to usage and increases power consumption. I'm also unsure which rc-lookahead value I should use or if I should even use it. The player on my Android device crashes as it unable to process it. If I record myself spinning my camera around, that results in a 250mb bitrate.
That is an absurd level and may result in very high bitrates which may render it unplayable on certain devices. In your example you're using a level of 10. If you define the min and max you're constraining the ability for the CQ level to be more efficient. But if you spin your camera around really fast, the bitrate will balloon to keep the quality consistent. If you record your game and don't move, a CQ level of 23 may show you bitrate of 10mb. It is similar to VBR if you don't define the min and max. Does using the same value with qmin/qmax counters the effect of VBR?ĬQ is more efficient in terms of space saving.
I don't understand why there's a difference in file size with "-cq 10" and "-cq 10 -qmin:v 10 -qmax:v 10". All three of these are forms of quality control. I can't decide on which CQ value I should use and if I should use qmin/qmax parameters. As you have noted the size is generally smaller. VBR requires more processing power to complete this task and as such it can take little longer. It does this by analyzing the difference between frames. VBR allows the encoder to reduce bitrate for low motion contention and increase bit rate for high motion content. I'm using a variable bitrate (vbr) to get smaller files. A lot of your quality concerns were addressed with the link provided, but your questions here were not answered.
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