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Improving performance of rav1d video decoder

(ohadravid.github.io)
305 points todsacerdoti | 1 comments | 22 May 25 11:59 UTC | HN request time: 0s | source
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IgorPartola ◴[22 May 25 13:34 UTC] No.44061907[source]▶
AV1 is an amazing codec. I really hope it replaces proprietary codecs like h264 and h265. It has a similar, if not better, performance to h265 while being completely free. Currently on an Intel-based Macbook it is only supported in some browsers, however it seems that newer video cards from AMD, Nvidia, and Intel do include hardware decoders.
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flashblaze ◴[22 May 25 15:37 UTC] No.44063108[source]▶
I'm not really well versed with codecs, but is it up to the devices or the providers (where you're uploading them) to handle playback or both? A couple of days ago, I tried to upload an Instagram Reel in AV1 codec, and I was struggling to preview it on my Samsung S20 FE Snapdragon version (before uploading and during preview as well). I then resorted to H.264 and it worked w/o any issues.
replies(2): >>44063130 #>>44063498 #
kevmo314 ◴[22 May 25 15:38 UTC] No.44063130[source]▶
Instagram (the provider) will transcode for compatibility but likely the preview is before transcoding, the assumption being that the device that uploads the video is able to play it.
replies(1): >>44063710 #
1. ta1243 ◴[22 May 25 16:35 UTC] No.44063710[source]▶
Yes that sounds spot on.

I don't know instagram, but I would expect any provider to be handle almost any container/codec/resolution combination going (they likely use ffmpeg underneath) and generate their different output formats at different bitrates for different playback devices.

Either instagram won't accept av1 (seems unlikely) or they just haven't processed it yet as you infer.

I'd love to know why your commend is greyed out.