search

Anime4000 / IFME

Powerful x265 GUI Encoder
https://x265.github.io/
GNU General Public License v2.0
249 stars 54 forks source link

Original .webm file is smaller than resulting x265 .mkv #116

Closed slrslr closed 7 years ago

slrslr commented 7 years ago

Hello,

thx for nice IFME.

I wanted to ask why the original .webm file is smaller than HEVC encoded .mkv file? Original (webm): 25mb, resulting (mkv): 26mb

On Picture tab i have default settings: auto, auto, 8, 420 On Video tab i have: medium, off, 26 On Audio tab i have: 128 bit rate set

Screenshot: https://snag.gy/cQHZu9.jpg

Does IFME wrongly detect bit rate?

If this is not issue, it can be closed. Thank You

Anime4000 commented 7 years ago

encoding file already encoded is likey file getting bigger, if original has pixel artifact cause by compression, when coding, that artifact become as new image, encoder doesn't know that was an artifact.

to overcome this, you need trade with time which is encode in veryslow preset, this will try to detect image artifact and copy as is.

slrslr commented 7 years ago

trade with time which is encode in veryslow preset

Thx, i see that "veryslow" Preset is on the "Video" tab.

PS: per the screenshot i see that the webm file is using Google's encoding (VP9) which quite equals to HEVC (in terms of resulting file size), so that might be probably why HEVC encoding not decreased size significantly.

thefinaldegree commented 7 years ago

You are correct. VP9 is a fairly similar, if simpler, codec. x265 really is made for HD content and that's really where it'll start to outperform VP9. Also x265 supports resolutions much past HD & 4K.

On Fri, May 5, 2017, 12:17 AM slrslr notifications@github.com wrote:

trade with time which is encode in veryslow preset

Thx, i see that "veryslow" Preset is on the "Video" tab.

PS: per the screenshot i see that the webm file is using Google's encoding (VP9) https://www.webmproject.org/vp9/# which quite equals to HEVC http://www.streamingmedia.com/Articles/Editorial/Featured-Articles/The-Great-UHD-Codec-Debate-Googles-VP9-Vs.-HEVC-H.265-103577.aspx (in terms of resulting file size), so that might be probably why HEVC encoding not decreased size significantly.

— You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub https://github.com/Anime4000/IFME/issues/116#issuecomment-299168682, or mute the thread https://github.com/notifications/unsubscribe-auth/ALp1vrkF3e5EbmFplHcMXXAzzlX63NNZks5r2cH2gaJpZM4NQbU0 .