Trying out #av1 very low bitrate (100kbit @ 480p) encoding with SVT-AV1 4.0.1 now that it's available in https://archlinux.org/packages/extra/x86_64/svt-av1/
Comparing some older encodes I can't really see image quality difference (the bitrate is too low I guess), but the encoder can now run 2x realtime at 480p on my 9y old CPU, I remember doing 1.6x - 1.7x before. Nice!
@sebsauvage Hello,
Alors j'avais déjà testé #AV1 il y a 6-12mois mais sans conviction de gain. Je viens de retenter l'expérience, x265 reste pour moi, au-dessus en terme de qualité/taille fichier. (j'ai décliné via script en AV1(j'ai poussé le preset à 4 quand même) vs x265 en preset slow et mis le même crf => fichier 756MB = A1:207M - x265:114M ou 3.7GB = A1:1.7G - x265:1.1G
J'avais regardé pour opti pour run sur du rpi4 at home :) (passer en nuc) mais ca reste plus avantageux dans mon cas.
Выпуск SVT-AV1 4.0, кодировщика для формата видео AV1
Опубликован выпуск библиотеки SVT-AV1 4.0.0 (Scalable Video Technology AV1) c реализациями кодировщика и декодировщика формата кодирования видео AV1, для ускорения которых задействованы присутствующие в процессорах x86_64 и ARM расширения для аппаратного распараллеливания вычислений. Проект создан компанией Intel в партнёрстве с Netflix с целью достижения уровня производительности, пригодного для перекодирования видео на лету и применения в сервисах, отдающих видео по запросу (VOD).
#AV1
Je vois que svt-av1 (qui est désormais réintégré à AOM) est sorti en version 4.0.0 (avec des breaking changes dans l'API 😕).
Vous savez s'il y existe un ffmpeg qui l'intègre ? (et où le télécharger, ou alors il faut compiler ?)
#av1
Pour fun, je teste la recompression de quelques épisodes de Dexter.
C'est quand même dingue de se dire qu'on peut mettre 50 minutes de vidéo dans 150 Mo 🤯
AVT-AV1 4.0 released
SVT-AV1 4.0.0 is here!
Changelog: https://gitlab.com/AOMediaCodec/SVT-AV1/-/releases/v4.0.0
SVT-AV1-PSY's porting efforts are fully complete, and this release also features huge AVIF improvements. Maybe the most exciting release to date by my standards – SVT-AV1 is finally a real perceptual encoder!
#av1 #avif #compression
🎞🗜 #compression #vidéo #AV1 #ffmpeg
Comme promis : voici mes paramètres pour ré-encoder mes vidéos en AV1 (petite évolution par rapport à mon pouet précédent) avec l'explication de tous les paramètres.
https://sebsauvage.net/wiki/doku.php?id=ffmpeg#re-encodage_en_av1
J'ai aussi mis des exemples concrets de compression, avec taille résultante et durée d'encodage, histoire de se faire une idée.
Si vous voyez des erreurs, si vous aves des suggestions, je suis à l'écoute !
With the endless ads on #youtube , I've been moving some of my videos from my channel over to my #peertube instance.
It's been a learning experience on how to make the best use of storage (it's expensive. Who knew), and had to conform all the uploads to 1080@25 instead of 1440@50.
Surprisingly, despite being high-motion, the videos don't loose too much after compression (undulations/holes/bumps get compressed-away) with #av1
Now I can watch my videos without ads.
This Intel Arc based graphics card is priced just around 100 € and is not spec'd for high-end gaming. But it has AV-1 hardware encoding on board. I want to test this for my Godot extension “Video Toolkit for Godot”. Expect some benchmarking in the near future.
So, the last two days of ripping/encoding went well, very happy with the new encoder module and the overall results. The `svt-av1-psyex` encoder did awesome work, and there's nothing like seeing a 6.5GB file get reduced down to 190MB without a noticeable loss of quality.
The last show took about 1.5 to 2 hours to encode per episode, thankful that I had more than one encoder running at the same time. Gonna call everything a success.
Oh yeah, this is gonna take a long while. Time to let it do its thing and enjoy some beers outside for a nice Saturday.
Final tests in and the quality is outstanding. Going from the stock `svt-av1` encoder to the `svt-av1-psyex` encoder is already a nice bump in quality, and the encodes are faster using `av1an` due to using every ounce of the CPU. The `lsmash` speedup is nice as well as the stock method for chunking took a bit longer post-detection.
Also, can't say enough about the Ryzen 9 HX 370: did a great job with the encodes and only burned through ~24W during the encodes along with the Thinkpad that kept the temps around 68C.
Film grain synthesis, the white whale of #AV1 encoding, has been achieved at Netflix. It's part of the spec, but they recently enabled it "at scale" which is key,.
Because noise does not compress, removing it and then synthesizing it after creates higher quality at the same bitrate.
https://netflixtechblog.com/av1-scale-film-grain-synthesis-the-awakening-ee09cfdff40b
RE: https://social.linux.pizza/@BigHeadMode/115818306418984921
Afternoon crew please check out my 85x64 pixel encode of a 100 minute #PublicDomain movie that fits within Discord's 10 MB limit. #encoding #video #videoencoding #compression #AV1
Parece que #PeerTube ha destrozado mi gameplay de #WeirdWest, dejándolo a 30 fotogramas por segundo y sin sonido.
Nada, reprocesaré el fichero original para pasarlo de #AV1 a x264 a baja calidad y con el sonido en AAC en lugar de Opus, a ver si así se lo traga mejor, aunque puede que la cosa quede para mañana.
Manda huevos que sea #YouTube el principal impulsor de los formatos de multimedia libres, y me refiero aquí a #VP9, AV1 y #Opus principalmente.
Netflix made a 4K HDR #anime compression torture test. It's only 5 minutes, but the raw file is 300 GB, and this lossless encode is 81 GB. It's released under #CreativeCommons so it can be seeded indefinitely!
This 3GB version by Beatrice-Raws is equivalent to a 2 hour movie being 138 GB. A typical 4K film is around half that size, with anime often being even smaller.
So in theory, this 3GB version will be more than sufficient.
The blog on the production is interesting:
https://netflixtechblog.com/bringing-4k-and-hdr-to-anime-at-netflix-with-sol-levante-fa68105067cd
Woah. AV2 (successor to #AV1) is getting released/bitstream frozen in the next few months. h264 lasted like 15 years, but AV1 has only had a few years on the scene before the sequel is released. If past codec rollouts are an indication, that means hardware support in ~2 years, and wide adoption on Netflix and YouTube in ~5.
They are emphasizing hardware decode simplicity. Not clear if that means about as complex as AV1, or less complex. AV1 hwdecode exists even in $20 walmart boxes now, so probably not a big challenge.
I just found that #av1 has a successor, AV2 https://en.wikipedia.org/wiki/AV2.
