Playback Issues With UHD 4K H.265

Joined
Aug 20, 2016
Messages
22
Likes
2
Location
Pensacola, Florida
Country
United States
Dash Cam
Blackvue DR650S-2CH, Blackvue DR750LW-2CH
#1
Straight to the point here. I just received my BlackVue DR900S-2CH a couple of days ago and though I like the camera, I found that even the BlackVue Viewer won't play back the footage from the front camera smoothly at all. Thinking it was the viewer, I uninstalled and then re-installed the latest viewer but the playback was still choppy and the audio somewhat.

Through some research I found that it was my PC. Though it is fairly new, (less than 2 years old) the processor is not sufficient to playback the UHD H.265 video. I have played the video with no problem at all at work, and I will admit it looks impressive.

The thing that irritates me is that for a camera system costing almost $500, BlackVue would have put in some notification that a computer needs a compatible processor to provide a smooth playback of this UHD H.265 video. Comments I have sent to BlackVue have yet to been replied to with an adequate resolution to this
 

kamkar1

Well-Known Member
Joined
Oct 11, 2013
Messages
16,924
Likes
8,797
Country
Denmark
Dash Cam
Lukas LK-7500G / Innovv C3 / mobius / G1W / SG9665GC & more
#3
Thats why many makers stay away from H.265.

I tried it with the mobius 2 and 1080p H.265, and it worked just fine on my 5 year old quad core computer ( core I7 - 3770k )
But on my little sisters old dualcore laptop with some low end intel or AMD cpu it was not able to play in any way

So change the camera to H.264 and you should be good.
 
OP
OP
SteveFL
Joined
Aug 20, 2016
Messages
22
Likes
2
Location
Pensacola, Florida
Country
United States
Dash Cam
Blackvue DR650S-2CH, Blackvue DR750LW-2CH
#5
So what settings in the DR900S do you change to have it record in H.264? I can't seem to find any documentation on how to change this.
 
OP
OP
SteveFL
Joined
Aug 20, 2016
Messages
22
Likes
2
Location
Pensacola, Florida
Country
United States
Dash Cam
Blackvue DR650S-2CH, Blackvue DR750LW-2CH
#10
My next question is that if you record in H.265 and then convert it to H.264, do you maintain the same quality as H.265 but with a much larger file size or do you lose quality during the conversion? I know going the opposite way, from H.264 to H.265, you do lose quality but what about going from H.265 to H.264?
 

jokiin

Well-Known Member
Manufacturer
Joined
Jan 27, 2013
Messages
39,581
Likes
20,348
Location
Shenzhen, China - Sydney, Australia
Country
China
Dash Cam
Too many ¯\_(ツ)_/¯
#11
if you re-encode you're going to give something away in the process, if playback is an issue you're better off just recording in H.264, if you ever need to send a file to an insurance company you're going to be pushing it to find anyone that will be able to play your files if they're H.265, something else to consider
 

Nigel

Well-Known Member
Joined
Jul 7, 2014
Messages
6,090
Likes
2,797
Location
Devon
Country
United Kingdom
Dash Cam
Gitup F1, 0906, A129, B1W
#12
My next question is that if you record in H.265 and then convert it to H.264, do you maintain the same quality as H.265 but with a much larger file size or do you lose quality during the conversion? I know going the opposite way, from H.264 to H.265, you do lose quality but what about going from H.265 to H.264?
You have the same choice of bitrates whichever format you record in, so the recorded files will be the same size. H265 should record a bit more detail, although if you are going fast under trees then you may not see much difference, and if you are not going fast under trees then you don't need the extra detail because it is probably not visible!

Converting it from H265 to H264 without loosing your extra detail will require a higher bitrate, converting it and using the same bitrate will loose the extra detail.

Any conversion always looses some quality, although doing it only once should not be noticeable, which ever direction you are going. Converting it back and forth 10 times will make it look rather poor quality.

The big advantage of H265 should be that you can record at a lower bitrate giving you longer record times, but I think if you compare recordings while driving under trees in your highest bitrate and next highest you will decide that you still want the highest bitrate, in which case you will not see much advantage to using H265 and you might as well record in H264. H265 would be much more useful if our cameras could manage variable bitrate so that when parked with not much moving the bitrate goes down to near zero, however since they always run at the specified bitrate, even if there is nothing moving and the image is pure black at night we are not going to see much advantage. If you want to archive your video then converting it to variable bitrate H265 can save a huge amount of space.
 
Top