Has anybody been successful using a Netint T1A or T2A with Handbrake or Tdarr? I'm also curious to see if anybody has done any independent benchmarks or actually got their hands on either of these two cards, as I'm curious how they compare with Intel Arc or Nvidia 4xxx series.

How do you losslessly convert other video formats like H.264 and H.265 to AV1?

Please feel free to test it out before you tell me I'm wrong, here are some issues:

1 If you upload something big while you are streaming and it starts dropping frames, even if you stop the upload, the stream won't revive it self. like other encoders

2 You cant change the bitrate while you are streaming in the options like other encoders, you must stop the stream to do it

3 When you set the bitrate to constant it isn't actually perfectly constant like in x264. it varies to the amount you set.

All these tests are done on Youtube streaming

Hi there,

we usually record videos with a 4k camera and are looking into getting new hardware for re-encoding them with ffmpeg into UHD, WQHD and FHD. We're going to use a reasonably fast quality preset. I am curious whether AV1 CPU encoding is viable and what the rough encoding times (in FPS) would look like. We haven't settled on the hardware yet, but currently we're looking into an AMD 7900X class CPU and an AMD 7800 XT GPU-wise. Would you recommend going for a better CPU to boost the encoding performance? Or is GPU encoding a better idea? What are the quality differences between the hw/sw encoding?

Thanks!

How do I make animated AVIF files using Shutter Encoder? If not, then what can make them?

It used to contain a bunch of info about AVIF, but now it seems to be a Thai sports betting site?

I guess the owner sold it or let it expire?

https://web.archive.org/web/20231207174738/https://avif.io/blog/articles/avif-faq/

https://avif.io/

I have had this issue for a couple of versions, but decided to test again with the latest version of FFMPEG. Generally I have been trying to compare the quality of x264 very slow with svt-av1, and in general the latter looks superior. Though, I have noticed that for my 4K ProRes test-clip, the first 3 frames of the svt-av1 encode, I always get some hints of macro-blocking in the image. Not in the most detailed areas, but rather in areas that are relatively smooth with a soft color gradient.

Macro blocking also happens in the x264, but the blocks are smaller and is therefore a lot less noticable at first glance. Apart from the small parts of the image screenshotted below, the entire rest of the image looks superior with svt-av1. A small issue, but this a quality problem I would prefer to get rid of.

Since it is only a problem for the first 3 frames, it is probably not a problem for most people, but I intend to use the export as a looping GIF-replacement. And on repeated views it could become more noticeable.

The whole face looks fine, but at the neck-line there are some hints of large macro-blocking rectangles.

Screenshot of original ProRes for comparison.

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Some \"macro blocking\" happening at the right side of the darker area. This is part of a blurry background.

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Screenshot of original ProRes for comparison.

​

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FFMPEG settings-array here, extracted from my Swift-code:

"-y","-i", InputFilePath,"-v", "quiet", "-stats", "-an", "-vcodec", "libsvtav1", "-preset", "8", "-pix_fmt", "yuv420p", "-crf", "35","-vf", "scale='trunc(ih*dar/2)*2:trunc(ih/2)*2',setsar=1/1,scale=w='if(lte(iw,ih),1080,-2)':h='if(lte(iw,ih),-2,1080)'", "\(OutputFileNamePath)_av1.mp4"

Note that I have also tried with 10-bit pixel format. For my use-case speed and compatibility is more important than quality. Though, the quality should be better than x264 veryslow if I'm going to use it, and not significantly slower to encode. I have also tried a couple of different presets ranging from 6 to 9. The problem seems to be there regardless, but I have mostly tested preset 8.

Any idea how to fix or at least an explaination of why it happens?

I would like to get AV1 software for encoding/transcoding that I can place on a small PC. Does someone make such sw for licensing?

I have several videos recorded via OBS, but their recording was terminated abnormally and they are supposedly missing the end of the file. I tried a lot of software, but none of it could restore the files, probably because they all only support older codecs.

UPD: container is mp4

https://youtu.be/xSeXZRJOX54

Are they Netflix/Youtube streaming higher quality per bitrate with AV1, or reducing the bitrate to match VP9 and saving on costs?

I would guess the latter, so they avoid customer support issues, "my TV looks worse than my computer, help me". And of course $$$ savings for them. But then I don't understand the hype for the average user who aren't encoding their own videos.

Also wouldn't it make more sense for battery powered devices to disable AV1? Even if it was a better stream quality it usually won't matter on smaller screen devices.

I am looking to encode some Cinemagraphs of some city scenes which are mostly static, but which have occasional movement. They are very noisy and I don't mind some of that original detail being lost as long as they don't become too smeary. I intend to encode in 4K

Are there some options in SVT-AV1 which can help to optimise for this kind of scene? I don't mind if the encode is slow, and don't really need many speed optimisation options. I normally encode using h265 in yuv422p12le and would like to have the same bit depth and chroma sub-sampling if possible. I have always felt the final product is superior.

So I am trying to encode a video with ffmpeg and nvenc (I have a rtx 4070) to av1 but in VLC its just displaying a black screen, in mpv on the other hand its just displaying the video. Putting the video in Avidemux I can't start playback so it also is screwed up there (Stands to reason that its a fileproblem and not a program problem). Both VLC and Avidemux have handled different AV1 MKV files just fine (even AV1 decodes of the same original file but done with handbrake)

My current command looks like this:

ffmpeg -hwaccel auto -i input.mkv -pix_fmt  yuv420p10le -c:v av1_nvenc -map 0 -preset medium -crf 30 S:\output.mkv 

did I do anything wrong while hacking that command together? I know that it doesn't use that Pixel Format but p010le instead (yes its 10 bit on purpose) but that couldn't be it anyways, I had the issue even without pix_fmt being defined.

The A17 and M3 support AV1 decoding, and H266 standard has been out for almost 4 years already. Do u think they will eventually release H266 decoding and encoding, or are they only committing to AV1?

Even though everything I read about AOM being the reference and the highest quality implementation of AV1. streaming to youtube. looking like SVT is better, why?

Also note I only tried 720p with low bitrate to compare.

I have a pipeline setup in my homelab to run ffprobe on media, check the codecs on video streams, and convert the video streams to AV1 using (CPU) SVT-AV1 if needed.

I'm pretty happy with it (even if I am about to rewrite the whole thing): https://github.com/GoingOffRoading/Boilest-Manager

Over the last 110 days running encoders on 3 machines 24/7, it's processed 7,446 files, and saved me 4,463,540 MB in disk space.

Not bad... But at this rate, I won't be done encoding my media for another year or two.

I know that if I switched to HW encoding, that the encoding would run MUCH faster than me adding another1-2 CPU nodes to my cluster. However the picture quality of the HW encodes would decline, and the file sizes would grow.

Which is why I'd really like to hear from anybody that has done both HW and CPU AV1 encoding:

• Was the decline in picture quality of HW encoding over CPU encoding noticeable?
• What the increase in file size something you noticed/impacted you?
• What are your thoughts on CPU vs HW?

What does AV1 hardware support in Meteor Lake mean? Is it for transcoding from other formats to AV1 or for AV1 to others? Does it also enable practical real time transcode from AV1 to other formats?

Is there a hardware encoder for 12 bit color depth 4:4:4 anywhere? I asked about AV1 but I’m curious if other codecs have support.

Hello, well, I have a problem with AV1 with the nvidia codec, it allows me to record with AV1 but if I stream, sometimes it happens that after an hour the signal that sends to YouTube goes away, I've seen that YouTubers can stream with AV1, but in my case it won't let me...

I have been since I acquired the RTX4060 and I only stream at 1080p with 15k bitrate, and sometimes av1 works in streaming, about 1 or 3 hours later it cuts off because I lose the signal and I have a 500mb plan, someone can help... I don't know what to do anymore

Like said in the title I don’t get how it works. I have a cpu with 12 threads and as libaom-av1 can only use up to 8 threads I launched 2 simultaneous encodes at 6 threads each but my cpu is only used at about 80%. I don’t get what’s happening.

Got some AV1 rips online but very few play well on my TV (has hardware decode). Some don't play while some need HDR to be manually switched on and colour space set to BT.2020.

Also, some Sony TVs seem to have AV1 decode blocked on USB and locked to OTT. Any way to fool the TV?