On Wed, Oct 21, 2015 at 9:08 PM, Liran Sharoni <liran.shar...@sandisk.com> wrote: > Forget what mediainfo I posted , I am a new user and I am asking for advice: > How can I re-encode a video after changing it while keeping it as identical > as possible? > > I guess I need help evaluating the parameters for " identical" so I am > consulting with you guys : > I want to keep the timestamps , quality and the file-type > Is there anything else I am forgetting ?
In order to evaluate the parameters for "identical", it will help to do what Moritz and myself have asked on numerous occasions:post your full uncut console output. It tells us a lot about your input is, and it will influence the settings required for the output. To just get the input info, run FFMPEG -i YOURFILE.mp4 and post that output here. You cannot use -vcodec copy when using a filter, so the nearest that you will get when using a filter is a lossless codec. Research framemd5s and do some test encodes without your filter if you're paranoid about lossnessless. We already mentioned ffv1. it sounds like your input codec is h264, so why not use libx264 lossless if you want to stay as close to your original as possible? keep in mind that your file size will increase significantly. I'd recommend ffv1 as it will mostly like produce a smaller file with a quicker encode. The file type of your input seems like a lossy implementation of h264. In order to use the same "file-type" and settings, you will get generational loss and reduced quality. A lossless codec will produce an identical bitstream minus your filtering. You can try a production codec like prores which will probably result in a very similar quality, again with a much larger file size. You could also try experimenting with lossy h264 settings, perhaps crf presets so that the output looks identical to you. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user
