Tide
First Officer
South Korea
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gio37540 Posted at 6-3 04:19
Even at half birate 50Mbps it captures 20% more details with a smaller end file in H265 than H264 100Mbps , the H264 is outdated !
Maybe they can let the user choose between H264 and H265 for those who still wants to use H264 because their PC is not powerful enough to handle H265 videos , but since the beginning I saw a lots of posts demanding to implement H265 to the Osmo Pocket and it looks like DJI don't care
The Osmo Action has exactly the same problem , the gopro 7 shoots better videos in the details and has less compression just because it uses H265 and it's only 78Mbps
Hi Gio,
This is a subject that I would be happy to be proven wrong.
Cause I also had a same question and did some research a couple of days ago.
I end up looking through HEVC codec standard paper.
What I find is that H265 is not created to improve the image quality as a main focus.
It is created to conserve the network bandwidth in mind.
Compression algorithm is not a clear cut. HEVC compares more frame to get more accurate compression but it is for smaller file size not for better image quality.
Basically to have a better image quality, you need to have more data in it. (Max is Raw file)
And before the codec compress all the data, CPU need to be able to handle all that data. (Also the memory bandwidth of the system.)
So if pocket's image processor is only good for handling upto H264 100Mbps than even the codec is H265 it will have the same data amount to compress. It will end up 30~40% smaller file size but same data amount.
I am happy to be proven wrong as I also interested in researching this but all the GoPro 7 H264 vs H265 video comparison shows no visible difference.
If H265 is the silver bullet for better image quality, all the big camera makers like Cannon, Fuji, Sony should be the one adapt it first. (Although they are working on adapting H265 like Sony to replace XAVC to XEVC for Bayer RAW endocing to 12bit color, it comes with new precessor as well. Their main reason to adapting it is not for improvement of current set up but because it allow to record the needed massive data amount to be reduced to fit on the bandwidth of exising storage media.)
The pictures you posted has different amount of data object in the scene and it could be the difference in movement speed between frames. (cannot really tell cause there are many comperison videos that all tell the different story in every direction.)
If possible, I like DJI to use H265 and bump up the data amount up to H264 200Mbps equivalent with 10bit color for HDR rendering benefit. But I don't think that is how it works. |
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