I'm not sure I understand what you mean, do you mean a hash like md5 and sha1? Could you please elaborate and simplify a bit?
On Sat, Sep 30, 2023 at 7:51 PM MediaMouth <commun...@gmail.com> wrote: > What about using a hash to check your existing against your possibly new / > possibly matching file. If it's a match don't run ffmpeg on it. Assuming > i'm understanding what you're trying to achieve, it would seem better > practice not to touch the file with ffmpeg when you can avoid it. > > > On Sep 30, 2023, at 16:43, Stéphane Archer <archersteph...@gmail.com> > wrote: > > > > Let's say you have a video file encoded with high bitrate with the > > ultra-fast preset in H.264 because you couldn't afford CPU at that time. > > Now you have a huge file mostly because it was encoded quickly. > > > > You are now two days later with access to a good CPU and GPU. > > > > If you re-encode that file to save space then you are going to lose > quality > > because even AV1 with a high bitrate is lossy (and you want to reduce > that > > high bitrate) > > > > Otherwise, you can try transcoding using lossless compression but during > my > > testing, this is making the file way bigger no matter what I tried. > > > > So basically, I can lose quality, or keep the big original file... > > Do you know a better way? Is there a way to re-encode that inefficiently > > encoded file without losing quality and reducing file size? > > > > Best regards > > > > Stéphane Archer > > _______________________________________________ > > ffmpeg-user mailing list > > ffmpeg-user@ffmpeg.org > > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > > > To unsubscribe, visit link above, or email > > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > -- Best Regards, Stephane Archer _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
