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There is the x264 Zones parameter: x264 --fullhelp ... --zones <zone0>/<zone1>/... Tweak the bitrate of regions of the video Each zone is of the form <start frame>,<end frame>,<option> where <option> is either ...


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Handbrake doesn't provide a thumbnail/screenshot option as far as I know (nor does a quick search of its source code from github yield anything for "thumbnail" or "screenshot"). I run Handbrake CLI to generate MP4s, then separately generate thumbnails after the fact with ffmpeg. Given that you're already using the CLI, one more command call to ffmpeg should ...


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Yes I know this question is a year old, but there were no answers. That is motion artifacting, and is caused by the video encoder. Since you are already at Q=100, it is possible the only thing you can do is use a different program to encode the video, such as X264. It is not caused by the keyframe interval, since it is too short and the quality is too ...


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I had similar issues with the concat filter and I think it's due to the differing time bases used for the inputs. I overcame it with the concat protocol method. I think it's showing variable framerate for your trim-only output because with a 1/90000 base time a 60Hz video will have expect a frame every 1500, but the concat filter may have smushed two ...


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You cannot codec copy when applying a filter. Also, Youtube has a max framerate of 60fps, so if that is your end goal, you will be dropping frames from your variable framerate file at some point within the transcoding chain anyway. It's hard to give better advice without having more specific knowledge of your file type, and what your desired end format is. ...



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