x265 HEVC Encoder

[alex1399]

Originally Posted by foxyshadis

If you have a bit-budget, in any way, shape, or form, then you need to turn on VBV. You're only exceeding it because you didn't set up VBV correctly. If you're consistently exceeding it throughout the whole video, you can either raise the profile (longer encoding, bit of a crapshoot on how much it lowers bitrate) or raise the crf (guaranteed bitrate and quality reduction).

OK, I found the culprit of the encoding process. The frame numbers of encoded video reported by ffprobe is one more than the original video material. In 2-pass encoding, the -f null - in the first pass encoding seems to bypass vsync detection and provide a invalid analysis for the coming second pass encoding which has a duplicated frame at the start.

If the -f null - in the first pass encoding is replaced by any dummy output, both output of the first pass encoding and the second pass encoding will have the same duplicated frame and the analysis is valid.

Is it possible to log only these error(warning) into txt file during the batch process, so I could read it when I'm back to screen?