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Comment by speps | Hacker News Reader

Interesting tutorial on libav for sure but the submission title is definitely a bit of a stretch given that it's just a libav tutorial and you can probably do the same with ffmpeg directly quite easily. Can we change the title please?

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For reference, just in case the title is changed, it is currently: "A Minimalist Encoder, Written in C, to Convert H264 to H265"

Not sure why you are being downvoted.

I too assumed this was some minimalist from scratch C-project, not a guide to using ffmpeg.

Agreed "A minimalist encoder with libav" would be better

It quite literally is not an encoder - title should be something like "how to use libav to convert H264 to H265" - libav is the only thing doing encoding here.

I thought it would be about finding a way to losslessly transform a H264 bitstream to a H265 one, and writing a simple application to do it. That would be a very interesting article if it was possible.

Even the title of the page itself is (currently) "FFmpeg libav tutorial - learn how media works from basic to transmuxing, transcoding and more" which is far more accurate.

That's exactly what I expected. Now I'm really curious whether this is possible.

Monsieur Bellard to the rescue please!

ignorant question: are h264 and h265 related in a way that would make this remotely possible?

Basically, no. Basic features like the transforms and loop filters are different. It would cause the result to rapidly differ after a few frames.

Sure, done now.

You can get quicker responses on this by emailing us at hn@ycombinator.com. We don't come close to seeing everything posted to HN, and I only saw this randomly now.

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