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The joy of HEVC
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clort
2021-06-28 , 23:07
Posts: 106 | Thanked: 314 times | Joined on Mar 2019
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To my great surprise, 24-30 fps
full resolution
HEVC (h265, libx265) encoded videos can be played back under Maemo-Leste, on Droid 4 with cpu alone!
By keeping bitrate low and using the
-tune fastdecode
option, mplayer (and sometimes mpv) has no trouble keeping up with the video! Very small filesize, acceptable small screen quality. Much joy!
Here's a sample ffmpeg line i just encoded with:
ffmpeg -y -i $1\
-filter:v "hqdn3d=0.0:0.0:7.0:7.0,smartblur=1.9:-.24:0.09:1:0.0:0.0,scale=960x540,setsar=1:1,eq=con trast=1.20:brightness=0.08:gamma=1.15"\
-filter:a "volume=1.4"\
-movflags faststart -c:v libx265 -crf 30 -pix_fmt yuv420p -preset medium -tune fastdecode -auto-alt-ref 0 -metadata:s handler_name=ClortVids\
-c:a libopus -b:a 56000 -frame_duration:a 60\
out.mkv
So this 2 hour film came in at about 280MB. 32 seconds is just 560kB.
http://0x0.st/-pE1.mkv
h265 does great for lectures, with static backgrounds.
http://0x0.st/-pEf.mkv
Playback cpu% (one core) on the omap4 is ranging from 75-98%, so higher bitrates and/or framerate films could be problematic.
Still, it's very nice for me. Small files, films and lectures watching on-the-go!
Last edited by clort; 2021-06-28 at
23:28
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