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  1. 14th Feb 2014 19:41 #1
    raphaelolaguer
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    Hello! I've seen H265 comparison at Youtube. Some compared an H265 to H264 video and it shows the difference. Does that mean Youtube supports H265 already? Because if not, his H265 video should be converted to H264 by Youtube and I won't be seeing any difference. Is my logic correct? Thanks for those who will answer!
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  2. 14th Feb 2014 19:58 #2
    jagabo
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    Originally Posted by raphaelolaguer View Post
    Hello! I've seen H265 comparison at Youtube. Some compared an H265 to H264 video and it shows the difference.
    Link?

    Originally Posted by raphaelolaguer View Post
    Does that mean Youtube supports H265 already?
    I don't think so. But you can download the video and check.

    Originally Posted by raphaelolaguer View Post
    Because if not, his H265 video should be converted to H264 by Youtube and I won't be seeing any difference. Is my logic correct?
    No. What they do is overcompress a video to the point that h.264 looks bad but h.265 still looks pretty good. Then they re-encode the videos side by side at a higher bitrate so the new video isn't further damaged (not so much, anyway).

    Since you mentioned it I took a look at one comparison video I found there.

    http://www.youtube.com/watch?v=lXY8Szhz42M

    It's not h.265 encoded and they severely crippled the h.264 video by applying a blend deinterlace!
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  3. 14th Feb 2014 20:48 #3
    raphaelolaguer
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    Originally Posted by jagabo View Post
    Link?
    http://www.youtube.com/watch?v=Ctjm1kxw-BM

    H265 claims higher quality video at lower bitrate. As far as I understand, an h265 10 mbps bitrate video would look the same as h264 20 mbps bitrate video. The standard bitrate for 2160p h264 on youtube is 35 MBPS. If I upload an H265 and half that 35 MBPS at around 17 or 18 MBPS, does youtube change the codec to h264, making an h264 18 mbps video?
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  4. 14th Feb 2014 22:08 #4
    manono
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    Originally Posted by raphaelolaguer View Post
    If I upload an H265 and half that 35 MBPS at around 17 or 18 MBPS, does youtube change the codec to h264, making an h264 18 mbps video?
    YouTube reencodes everything. As far as I know they won't even accept an uploaded H265 video.
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  5. 14th Feb 2014 22:27 #5
    raphaelolaguer
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    Oh I see. Thanks for the answers!
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  6. 15th Feb 2014 03:44 #6
    mike20021969
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    I was watching a documentary on YouTube which had some American bloke from YT talking about H265 on YouTube.
    I'm almost sure he said that it currently took them around 10 hours to encode 1 (yes, one) frame of full HD video.
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  7. 15th Feb 2014 03:58 #7
    Detmek
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    No, its not that slow. But it takes a lot more time compared to x264 encoding.
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