May 10, 2018 at 3:28 pm #142922
- Posts: 885
I am re-encoding since I took my Disney rides VHSC videos and transferred them to my laptop via SNAPPY and the parallel printer port.
This was last Millennium.
Later I made the BIG mistake to re-encode all the MJPEG files to the new Real Video format. Think 240 resolution and pixel town with tin can sound.
Over the years I discovered handbrake.fr with their very easy to use re-encoder and the not 1 pass, not 2 pass but their much better constant quality encoding.
Chris is always showing some friends of sponge bob hopping over the screen. So if you got to http://jell.yfish.us/ then you can test a lot of formats up to jellyfish-400-mbps-4k-uhd-hevc-10bit.mkv to see how awesome your little Celeron n3450 can perform.
To be fair please set the resolution magnifier from 150% (recommended) to 100%, this way it is a real fullHD screen you are using.
I stopped at jellyfish-300-mbps-4k-uhd-hevc-10bit.mkv what run without a stutter and any dropped frame.
Now the files are quite large for just a 30 sec clip.
So why not test how fast handbrake can re-encode these monster files to a more manageable size and let´s see if we can see any quality loss.
One of the pluses from the N3450 is it can encode with the GPU and help out the poor CPU.
2 test files
the 50Mbps H.265 185MB no sound
the 55Mbps h264 205MB with 640kbs 5.1 sound
When I re-encode I seldom re-encode sound because most is already good compressed. So the one with sound get set to pass through and the original sound track is just copied.
The h264 from 1080 to 1080 reaches an average of 23 frames per second with sound copy.
The H.265 from 1080 to 1080 reaches an average of 10 frames per second with no sound to copy.
Always when I tried to use H.265 it took forever even with much faster computers, so what happened?
If you use the normal H.265 and re-encode the H.264 55MB file you crawl with 2.8 fps also 13% of our re-encoding speed before.
If you use the normal H.265 and re-encode the H.265 50MB file you crawl with 2.5 fps also 25% of our re-encoding speed before.
Now what is the secret? If we use the Intel QSV H.265 codec the GPU and CPU work together and you reach a speed unheard with a little 250$ ultrabook regarding re-encoding.
How about the size from 185MB H264 to 39MB
and from 205MB H.265 to 45MB, includes the audio part of 2.3MB.
If we use the slower H.265(X265) codec and the Fast 1080p30 setting we can get the size down to 30MB this includes the 2.3MB audio part.
all re-encodings done in Constant Quality QP 22
and just for giggles a 4k clip
I took one of the smallest with 140Mbps jellyfish-140-mbps-4k-uhd-h264.mkv and used the Intel QSV H.265, so 4 times the resolution and we still managed nearly 5FPS to shrink 515MB to 117MB.
I tried it with the jellyfish-300-mbps-4k-uhd-hevc-10bit.mkv but this is really bringing the Jumper to it´s knees. Wit 2FPS you need 8 minutes 30 to re-encode a 30 sec clip from 1000MB down to 113MB
So YES you can use your Jumper 3 to re-encode your MI-Drone 4k videos to a more normal size in a very reasonable time.
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1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks
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