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H.265: the Good, the Catch and the How

H.265: the Good, the Catch and the How

With the rising popularity of 4K dash cams and videos, you are sure to have heard a lot about HEVC/H.265. Compared with H.264, H.265 does have great advantages, but what are they? Can you really take advantage of H.265? And most of all, how do you enable H.265 on your 4K dash cam?

What is HEVC/H.265?

HEVC stands for High-Efficiency Video Coding, also known as H.265, is an advanced video compression technology developed to offer higher coding efficiency and improved video quality.

Why is HEVC needed in dash cams?

Today, dash cam manufacturers are focusing on 2K and 4K dash cams. We have all seen the impressive image quality the Thinkware U1000, VIOFO A129 Pro and BlackVue DR900S have to offer. We are expecting to see more 4K UHD dash cams in the market this year or next. However, 2K QHD and especially 4K UHD video files are notoriously huge. H.264 (HEVC’s precursor) was standardized when 1080p Full HD video was the height of technology and as data-intensive as HD is, 4K is even worse. The move towards 4K dashcam videos has necessitated a new level of compression efficiency. Hello, H.265!

Building on the concepts behind H.264, the idea of HEVC is to offer the same or better level of image quality but with much more efficient compression so there’s less data to deal with. At an identical level of visual quality, HEVC compresses video at half the bitrate of H.264, making it twice as efficient. When compressed to the same bitrate as H.264, HEVC delivers significantly better visual quality.

How does HEVC do all that?

Image source:

Without going too much into the technical aspects, HEVC takes a more intelligent approach to encode videos by looking for repetition/redundancy within frames and making mathematical predictions of motion and changes. In other words, instead of sending every single image in a sequence, only the first full-frame and “unique” frames are sent, essentially lowering the total size of the file saved.

You can see a more technical explanation of this technique in this great video from HandyAndy Tech Tips.

The Good: More efficient compression performance without sacrificing image quality

Image source:

The main advantage of HEVC is better compression performance (without sacrificing image quality), and more efficient compression means you can store more 4K UHD footage files on your dash cam’s microSD card.

Let’s take a look at the table below. The table shows the difference in recording time you can get from the same SD card on the VIOFO A129 Pro at High bitrate setting in H.264 vs. H.265:




1 hour 15 min

1 hr 35 min


2 hours 32 min

3 hours 5 min


5 hours 5 min

6 hours 10 min


10 hours 15 min

12 hours 25 min

Longer recording time

In case you’re thinking, that extra couple of hours of recording time is not a big deal. It certainly is not, but if you have important footage on your SD card that you don’t want to have overwritten but you are running out of space on your microSD card (and you don’t have a spare one on hand), you’ll be glad you had that extra couple hours.

Longer parking mode coverage

Or perhaps your flight got delayed and you need to spend a few more hours at the airport? You’d be glad you had that extra storage space for the extra parking mode coverage and have the capacity for the extra event files.

Free up storage space

Got a Cloud dash cam and using the Thinkware Cloud or BlackVue Over-the-Cloud as a backup footage file storage? A smaller file size means you can save more on the Cloud before eating up all your allotted storage quota or needing to upgrade to a paid account (BlackVue).

This works, too, if you're downloading your footage files onto your mobile device. For instance, videos downloaded and stored within mobile devices will now only require a fraction of disk space that previous H.264 video files occupied. This means more space for other videos and apps.

The Catch: HEVC is not supported by all devices and programs

In a nutshell, HEVC is not completely supported by all popular devices. You’ll need Android™ 5.0+ and iOS™ 11 on newer phones and tablets with more powerful processors. For computers, HEVC is natively supported on Windows® 10 and MacOS® High Sierra on newer desktop computers with more powerful processors.

So, while many PCs and programs can attempt to play an HEVC video, it might stutter or be very slow without hardware decoding. So, HEVC doesn’t do you much good unless you have a graphics card and a video player that both support HEVC hardware decoding.

If you do not have an HEVC-compatible computer or smart device, we recommend using the H.264 codec.

Why hasn’t HEVC gained wide support and adoption?

Unlike H.264, HEVC comes with a high-cost royalty. HEVC also has 3 patent pools with different pricing structures and terms and conditions. In other words, the investment on HEVC is huge and many industrial companies are hesitant when incorporating it into their products. HEVC has been increasing support by many platforms and operating systems but it hasn’t gained the popularity that H.264 has among the market.

Other things to consider when using HEVC

Here are some other drawbacks of HEVC:

  • H.265 is much more complicated to encode, requiring triple the resources for the video to be prepared for playback; you will need a newer and faster computer to play it smoothly or to edit the files
  • H.265 requires the dash cam to work harder so the dash cam will generate more heat with H.265 enabled, something to be aware of in hot climates and in the summertime.

How do I know if my mobile device compatible with HEVC?


HEVC is supported on Android 7.0 Nougat or later devices using the Qualcomm® Snapdragon™ 820 series (or equivalent) processors and newer. Here are some of the leading Android phones supporting HEVC:


Galaxy® S7 / S7 Plus and newer; Galaxy Note 8 and newer


Pixel / Pixel XL and newer


Huawei P9 and newer


Xiaomi Mi 5 and newer


LG G5 and newer


HTC U10 and newer


Sony Xperia® X and newer


Moto Z® and newer


OnePlus® 3 and newer


HEVC is supported on iOS 11 devices using the Apple® A10 processor and newer:


iPhone® 6 (select bitrates only), iPhone® 7 and 7 Plus, iPhone 8 and 8 Plus, iPhone® X, Xs, Xs Max


10.5-inch iPad Pro®, 12.9-inch iPad Pro

What happens if I am trying to play HEVC files on an incompatible mobile device?

The mobile viewer app will most likely still copy HEVC files to your mobile devices, but beware that those files may struggle with playback. In general, mobile devices manufactured before 2016 will not handle H.265 files very well.

Is my computer compatible with HEVC?

In general, mobile devices manufactured before 2016 will not handle HEVC files very well.


HEVC is supported on Windows 10 computers using the Intel Kaby Lake (or equivalent) processor and newer.


HEVC is supported on macOS High Sierra computers using the A10 processor and newer

  • macOS High Sierra computers supporting HEVC
  • Macbook® – 2016 or newer
  • Macbook Pro – 2016 or newer
  • iMac – 2017 and newer
  • iMac Pro – 2017 or newer
  • 27-inch 5K iMac (2015-2017)  

What happens if I am trying to play HEVC files on an incompatible computer?

1. Playing Media on Unsupported Operating Systems

If your computer isn’t running Windows 10 / macOS High Sierra or newer, you will not be able to play HEVC files. Your desktop viewer (ie. Thinkware PC/Mac Viewer, BlackVue Viewer or Dashcam Viewer) may still copy HEVC files to your computer, but they won’t appear in the desktop viewer. Also, third-party apps won’t be able to play H.265 videos.

2. Playing Media on Supported Operating Systems, but Older Computers

While Windows 10 / macOS High Sierra supports HEVC, your computer must use a newer processor to play those files smoothly. Your desktop viewer may still copy HEVC files to your computer, but those files may struggle with playback. In general, computers manufactured before 2016 may not handle H.265 files well.

What if I Recorded in an HEVC Setting and Don't Have a Compatible Device?

In the event that you've recorded HEVC video footage and do not have a compatible device to play your recordings, there are a couple of options:

1. Convert Your HEVC Videos to the H.264 Codec 

Using a video transcoder application or software, you can covert your HEVC videos to H.264 (compatible across all devices) with minimal loss in image quality. HandBrake is a free, open-source application that many people recommend.

2. Video/File Hosting via Web

Upload your video to YouTube or another video/file hosting service. Once uploaded, you should be able to play your footage on any device compatible with the website, as you'll be able to utilize their compression.

How do I enable H.265 on my dash cam?

Thinkware U1000 (including Thinkware U1000 Single Channel and U1000 Dual Channel)

The U1000 only records with H.265 compression (reduces large file sizes when compared with the standard H.264 compression). If you have older computer hardware, it may not support or struggle with 4K video using H.265 compression.

BlackVue DR900S Series (including BlackVue DR900S-2CH, DR900-1CH and DR900S-2CH IR)

You can use the BlackVue smartphone app to change the codec settings.

To enable H.265:

  1. Go to your smartphone’s Settings > Wi-Fi and connect to your dash cam
  2. Open the BlackVue app. Select BlackVue WIFI and tap on the Settings icon to open the Firmware Settings menu
  3. Go to Basic > Video to open the Video Settings menu
  4. Choose between HEVC and AVC

VIOFO A129 Pro Series (Including VIOFO A129 Pro Duo and A129 Pro)

The default compression used for the A129 Pro is the common H.264 codec. However, VIOFO has included a hidden H.265 HEVC codec option.

To access the hidden H.265 HEVC codec you will have to:

  1. Stop Recording by pressing the record button
  2. Long press the MIC button for 4 seconds
  3. When an SD card icon appears on the left side of the screen, H.265 is enabled


The other VIOFO dash cam that offers H.265 codec. By default the VIOFO A119 V3 records using the popular H.264 codec.

How to Enable H.265 on the A119 v3

  1. Press and hold the “Rec” button to stop recording
  2. Press and hold the “Mic” button for 4 sec then let go
  3. Press the “Menu” button
  4. Press the center red “triangle !” button to choose the “Resolution” menu option

When it's all said and done,

As time goes on, more computers and devices will be able to handle HEVC video, and more players will support it more widely—just like they do with AVC/H.264 now.

Until next time, Safe Driving everyone!

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Based on 4468 reviews

I don’t install yet

Less Strain On Car Battery (2020 Hyundai Kona Ultimate)

It has been 4 days since the installation of the Cellink NEO Battery, serviced by a fantastic installation team. The NEO gives me an ease of mind knowing that it has added an extra 13-15 hours of running time to my Dual Channel Thinkware U-1000 dash cam system whilst my vehicle is turned off (parking mode). First off, it has been less stressful for me when starting my car because I don't see the "Battery Discharged" warning anymore, knowing that the NEO has put less strain on my car battery. Additionally, with a 40 minute drive-to-charge time frame, it isn't bad at all as my commute to and from work equates to approximately 45 minutes. Therefore, I get a full charge on the NEO that gives me 20-22 hours of run-time on my dash cam. One advice I would give to potential dash-cam buyers in making the jump to buy this battery is: if you haven't gotten a dash cam yet and if you are opting for the installation service, purchase your dash cam and the NEO together and pay for just 1 installation. I made the mistake of having to pay for 2 separate installation services because I decided to buy the battery later on and could have saved $200.

Hi Kevin, thanks for leaving a review. Great advice! Hope you're loving your Cellink NEO. Come back anytime if you have any other questions.
Fits 2020 Rav4 XSE hybrid

I installed this on the small space right hand forward of the spare tire. The thickness of the Cell link Neo is just perfect. It it was a little bit thicker the rear cover will not be flush with the floor. Negative connection was done directly to the vehicle 12V accessory battery as it is mounted at the right rear tail. ACC input was connected to the accessory rear 12V outlet. Cell link Neo powers 2 Garmin dash cam minis.

I wish the Cell link Neo have an option to change the name in the app. I have another Neo battery on another vehicle and it is hard to remember the serial numbers. But overall it works great.

Hi there, thanks for leaving a detailed review. Glad to hear that the Cellink NEO is everything you're looking for :) let us know if you have any questions in the future.
Easy installation

Works as described

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Great service

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Product and shipping

Shipping and blackboxmycar are great.

Product is expensive and 3m tape will not fit properly. For an expensive product from thinkware i would assume products would come with vehicle specific or general items to install properly. Other options than the 3m tape.

Keep in mind to take measurements for placing the main unit. It may not fit or able to be placed under your seat.

I have spent more money on a front stand and bolted the camera. The rear camera ive made brackets and bolted it.

Hi Blkhze, thanks for leaving a review! Sorry to hear that, but glad to see that you found a solution. If you have any future questions, please don't hesitate to reach out to us directly.
A pricey dash cam

Very pricey, yet not quite the "jump" in video quality I expected for the huge pricetag.
When the vehicle is not in motion, then video quality is very crisp and clear. However, as soon as your vehicle is in motion (driving...) the video becomes extremely "contrasted" almost like it is over-correcting for image quality, and in-turn making it worse. I had a rexing V1 (1080p) for 3 years, and saved me through 2 hit & runs... simple, good quality, cheap. I expected the jump to 4k to be huge... The video is "brighter" at best, but my Rexing V1 was definitely smoother while driving. Hopefully this is something a firmware update can fix. I have messed with the 2K @ 60fps, but the video quality drops noticeably... to worse than my 1080P Rexing V1. (Doesnt add up)
I have had my eyes on this camera since before it came out, but I am still hoping it can pull through...

Hi Kyle, thank you for leaving a review. We will definitely relay this feedback back to Thinkware. They're constantly working on new firmware for their models, especially the U1000, so we do expect it to get even better over time. That said, have you updated your dash cam to the latest firmware? If you need help, please don't hesitate to reach out to our team. We're here to help!
BlackboxMyCar is Excellent!

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Excellent item

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I purchased a spare ScanDisk SD card for my BlackVue. Not much to say.. Good quality and value.

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[$50 OFF] Thinkware U1000 4K UHD Dual-Channel Cloud Dash Cam

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The best in customer service and advice.

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Awesome Product and Support

BackBoxMyCar helped me make figure out which Dash Cam system was best for my 2015 Lexus RX350. Their live chat team is great to work with and they made figuring out the best dash cam for me very easy. After having it installed I am very impressed with the reliability and capability of this product. Also it was shipped out to me in less then 3 business days, which I found really impressive. Going forward I will continue to purchase from BlackBox due to this wonderful experience.

Hi Ben, thanks for leaving a review! We try our best to help our customers, so we're glad to hear that you had a great time with us! Come back anytime.
Excellent Purchase and Service from BlackBoxMyCar

This radar module was a great addition to my Thinkware U1000 dash cam system. The setup was very straight forward and this accessory is a must for passive parking mode. BlackBoxMyCar helped me with decision to make this smart purchase through the help with one of there representatives on live chat. Their customer support team is world class and very helpful.

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Fast shipping and great communication

I found this website after looking at youtube videos with vortexradar after searching for dash cameras. I have a 4 year old a119 that I have tried for hours and hours over the years to update the firmware on with no luck. It also isnt 4k and it doesn't have wifi. I find it a pain in the butt to take the memory card out and have to use the computer to download files. Now I can do it via wifi with my phone. Wifi is working fine for me with their app. I liked the a119 wedge shape and this is essentially the exact shape. The mounts are not compatible but not a big deal. This a129 pro has a much more substantial feel to it but isn't any bigger than the old model. I kind of wish I had ordered the rear camera bundle at the same time but I can always order the rear camera later. Everybody needs a dash camera to avoid the he said/she said bs that happens when there is an accident.

These guys ship fast. I am in Washington and ordered on a Monday. Camera arrived 2 days later on Wednesday. I had several texts and emails during that time keeping me updated on the progress of my order. I was so impressed that I am thinking about buying my next radar detector from them, the 360c. I am not sure if I am getting that one but that is the only one they carry.

Hi David, thanks for leaving a review. We hope you're staying safe out in Washington! We're glad to hear that you're loving your VIOFO and it's everything you need. Do reach out anytime if you have any other questions. One more thing, if you're interested in any other models of radar detectors, do reach out and ask. We may be able to source it for you at a great price. Thanks!


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[$50 OFF] Thinkware U1000 4K UHD Dual-Channel Cloud Dash Cam

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The complete package!

I recently purchased a thinkware F800 front and rear camera combo for my M4. After researching, I heard that BMWs are sensitive to voltage drops when the camera is in parking mode.

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A nice dash cam with GPS capabilities

I am very satisfied with the Viofo A119 V3 camera after using it for a week or so. It takes great video and is simple to operate. With the included GPS base I can select the speed and/or location to be recorded on the video. I just installed the optional wiring harness but have not experimented with the parking mode as of yet. Overall I am very satisfied with the build quality. The menu is easy to maneuver through and the buttons on the front are easy to use even when driving. I would definitely purchase this again!

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Excellent cam

Good rear view cam with great picture. Awesome thank you!

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So far so good.

Good tracking notice. I’ve only had it for a short time so I’m still playing with it to get it figured out. Video is very good quality (I’ve only used it in daylight so I can speak for nighttime). Instructions are minimal but I was able to get it figured out since it is pretty simplistic (I had to search the internet to get the time zone properly set). As it stands now I would highly recommend it for anyone looking for a good and simple dash cam.

Hi Jeff, thank you for purchasing at BlackboxMyCar, and thank you for leaving a review! We're glad to hear that the VIOFO was everything you were looking for. That said, if you have questions in the future, please don't hesitate to reach out to our support team. We are always here to help!
Viofo 3 Hardwire Kit

Installation seamless and easy. Made for cleaner setup. Highly recommended over using the provided cigarette lighter/USB.

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I wrote one over a week ago didn’t you bother to read it?

Let me know if you lost it!

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courteous and prompt communication, item shipped promptly

I ordered dash cams and accessories from blackboxmycar and have been very happy with their services. I had to communicate with them several times regarding my order, including talking to them over the phone and emailing them. Every single time I received very courteous response and satisfactory answers. The items were shipped promptly and I had them professionally installed. Overall, I am very satisfied. Thank you.

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Easy to install, easy to use!

BlackBoxMyCar sent everything I needed to install my Viofo A119 V3. A quick YouTube search gave me the easy steps for burying the wires and finding my fuse box for my F-150. And I was off and running! Thanks a bunch!

Hi Adam, thanks for leaving a review! Glad to hear that it all worked out for you :)