Miroslav, Your ivp9 webm improvements/simplifications look good to me. After running some tests, I have checked into GIT a new vp9.webm with only the 3 lines of b=0, crf=31, row-mt=1. From Andrea's tests, it seems like the other option lines are maybe not needed. I ran with and without them and I only saw a small size difference in the resulting file and could not visually see any difference. As far as speed goes, I just got varying results and for me it is slow like Andrea report and since I only do testing, I have the need for speed.
Also, I made the default for new configurations/users to be "vp9.webm" instead of "webm.webm". (Plus deleted old library versions of libvpx 1.11.0 and libaom 3.2.0 and their associated patches.) On Sat, Sep 24, 2022 at 3:32 PM Miroslav Rovis via Cin < [email protected]> wrote: > It's simple, and my wording may not be quite precise, but you guys and gals > will understand. > > So, when using the setting in the render window, I figured out that there > are > better settings to use than the presets that are offered. And they are > simpler > too. > > In essence, the Wiki page for VP9 can tell you all: > https://trac.ffmpeg.org/wiki/Encode/VP9 [*] > > I have no rendering, actually no Cinelerra opened right now, so, from > memory: > > It's just b=0, then add crf=31 (or other number), and then row-mt=1, and > remove > the min and max settings from the preset. > > I did use b=0 (which would correspond to -b 0 in the VP9 wiki page (but I > see > only -b:v 0 in the page). And it did work I can tell you. > > However, see there around: > "more contemporary CRF-style approach for the final pass to achieve a > certain perceptual quality" > and there is -b:v 0 in the second pass. > and around: > "must use a combination of -crf and -b:v 0. Note that -b:v MUST be 0." > > Also find: > "FFmpeg added support for row based multithreading in version 3.4, > released on > January 25th, 2018. As of libvpx version 1.7.0 this multithreading > enhancement > is not enabled by default and needs be manually activated with the -row-mt > 1 > switch." > which I find works great as well on my systems. They are relatively new: > AMD Ryzen 7 PRO 4750G > and also one: > AMD Ryzen 7 5700G > so if the above maybe would not work well on older machines, then, don't > know... > > So, this is a suggestion to improve the VP9 webm presets in Cinelerra > FFmpeg. > While I am getting better at understanding the source code, I would still > probably be to slow to find it and change it and send a patch myself. Too > slow. > And that would take me more time than I can set apart at this time. > > Regards! > > --- > I've been using VP9 (previously VP8) webm a lot. E.g. anywhere you go from: > https://www.croatiafidelis.hr/2022/ > or, to take just one sample (4 minutes): > > https://www.croatiafidelis.hr/2022/Jazovka/VID-2022-06-22-1034-Jazovka-procesija.webm > It's nothing but motion plugin set up, blur plugin in the bottom video at > 100%, > and go render. Then work the audio separately, mux and post. Of course, the > stabilizing is slow, motion plugin takes long to calculate. > > But all those people moving can be scrutinized in a lot of detail, as if I > filmed with a mobile phone attached to a good stabilizer, and instead, the > original was a shaky video as ever, because I held the mobile with just my > hand. > > Cinelerra can stabilize you videos well. It's worth the time-expensive > learning curve to get to know how to do it. > > Here are some comparison videos with both the shaky and stabilized video > (however I've gotten better since then, these are all old, but I have no > other > comparisons) > > e.g. from: > https://www.croatiafidelis.hr/2019/ > the videos e.g.: > > https://www.croatiafidelis.hr/2019/Jaska/190824-Jaska-Vukovic-demo-1-stabilize.webm > or from: > https://www.croatiafidelis.hr/2015/Macelj/Macelj-2-cmp.php > the video being: > https://www.croatiafidelis.hr/2015/Macelj/150607-Macelj-HebrangCOMP.webm > > -- > Miroslav Rovis > Zagreb, Croatia > https://www.CroatiaFidelis.hr > my PGP-key: > https://www.croatiafidelis.hr/FCF13245ED247DCE443855B7EA9884884FBAF0AE.asc > -- > Cin mailing list > [email protected] > https://lists.cinelerra-gg.org/mailman/listinfo/cin >
-- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
