Re: flac 1.40 verses ffmpeg
"Michael D. Lawler" <[email protected]> Thu, 29 Sep 2022 08:36:10 -0400
| Newsgroups | gmane.comp.audio.compression.flac.user |
|---|---|
| Message-ID | <[email protected]> |
--===============6054027146590887406== Content-Type: multipart/alternative; boundary="=====================_78268703==.ALT" --=====================_78268703==.ALT Content-Type: text/plain; charset="iso-8859-1"; format=flowed Content-Transfer-Encoding: quoted-printable The difference can either be small or from=20 200-300 K. Is adding welch to libflac a good=20 idea? Would you like access to any of the files? At 08:17 AM 9/29/2022, Martijn van Beurden wrote: >Op di 27 sep. 2022 om 17:10 schreef Michael D.=20 >Lawler <<mailto:[email protected]>[email protected]>: >These are all 44.1kHz and adding -b 4608 helped,=20 >but ffmpeg still does better than flac for this handful of files. > > >Then I think the remaining difference might be=20 >in the apodization used by ffmpeg. I think=20 >ffmpeg uses a welch window, whereas=20 >libFLAC=C2 uses a rather complicated arrangement=20 >of brute-forcing various windows approaches, not including welch. > >If that is not it, I presume the file size=20 >differences in these files are very small? >=C2 --=20 Michael D. Lawler email mailto:[email protected] --=====================_78268703==.ALT Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html> <body> The difference can either be small or from 200-300 K. Is adding welch to libflac a good idea? Would you like access to any of the files?<br><br> At 08:17 AM 9/29/2022, Martijn van Beurden wrote:<br> <blockquote type=3Dcite class=3Dcite cite=3D"">Op di 27 sep. 2022 om 17:10 schreef Michael D. Lawler <<a href=3D"mailto:[email protected]">[email protected]</a>>:<br> <dl> <dd>These are all 44.1kHz and adding -b 4608 helped, but ffmpeg still does better than flac for this handful of files.<br><br> </dl><br> Then I think the remaining difference might be in the apodization used by ffmpeg. I think ffmpeg uses a welch window, whereas libFLAC=C2 uses a rather complicated arrangement of brute-forcing various windows approaches, not including welch.<br><br> If that is not it, I presume the file size differences in these files are very small?<br> =C2 </blockquote> <x-sigsep><p></x-sigsep> -- <br> Michael D. Lawler<br> email <a href=3D"mailto:[email protected]" eudora=3D"autourl"> mailto:[email protected]<br> </a></body> </html> --=====================_78268703==.ALT-- --===============6054027146590887406== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Flac mailing list [email protected] http://lists.xiph.org/mailman/listinfo/flac --===============6054027146590887406==--