Answers.Body: <p>Both files that don't play feature Opus as the audio codec. As per this <a href="http://www.reviewcenter.in/4876/leeco-super3-x55-smart-tv-specifications-features-price/" rel="nofollow noreferrer">site</a>, Opus is not one of the supported audio codecs.</p>
  
  <p>Transcode the audio:</p>
  
  <pre><code>ffmpeg -i in.mkv -c:v copy out.mkv
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-02-02T08:53:13.880Z
Answers.Text: Wow. That was a good catch. Those specs weren't available even in their home site. Cool you could discover it.
Answers.UserDisplayName: Macindows
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-02-02T07:08:44.597Z
Answers.LastActivityDate: 2017-02-02T07:08:44.597Z
Answers.UserDisplayName: Gyan
Body: <p>I wanted to play UHD (4k) videos in my new LeTV (<a href="http://www.lemall.com/us/product/x355.html" rel="nofollow noreferrer">Super3 X55</a>). </p>
  
  <p>So I used <a href="https://github.com/rg3/youtube-dl" rel="nofollow noreferrer">youtube-dl</a> to download 4k YouTube videos (which are humongous btw) but for some reason most of them do not play.</p>
  
  <p>The TV's website specifically states:</p>
  
  <blockquote>
    <p>HEVC/H.265 hardware video decoding, up to 4K@60fps</p>
  </blockquote>
  
  <p>But only a few files play. I'm thinking the issue is something to do with codecs or formats.</p>
  
  <p>So I compared the info of files which <em>did</em> play with those that didn't. But I can't figure out the difference. Here are two files which played and two that didn't.</p>
  
  <hr>
  
  <h2>These two files played beautifully:</h2>
  
  <p>File 1 :: GoPro video</p>
  
  <pre><code>C:\Users\Hackathon\Videos\HD or 4k\GoPro\NA\NA - GoPro HERO4 - The Adventure of Life in 4K.mkv
     General
        Unique ID : 98713554682895442793938602234209693471 (0x4A438A01ACFC3EF5104AF4D6A778EF1F)
        Complete name : C:\Users\Hackathon\Videos\HD or 4k\GoPro\NA\NA - GoPro HERO4 - The Adventure of Life in 4K.mkv
        Format : Matroska
        Format version : Version 4 / Version 2
        File size : 581 MiB
        Duration : 4 min
        Overall bit rate mode : Variable
        Overall bit rate : 19.2 Mb/s
        Movie name : GoPro HERO4: The Adventure of Life in 4K
        Description : All around the world GoPro users are capturing incredible experiences, from the heart-stopping to the heartfelt. Into the caldron of an active volcano, the neon streets of Japan, a refuge for wild mustangs, scaling an iceberg, the world’s biggest dance party, or a whale rescue mission, GoPros have documented every moment. See how GoPro’s new line of our most advanced cameras ever allow you to beautifully and authentically capture and share the experiences that bring purpose, adventure, and joy to your life.
  
  Shot 100% on the new GoPro HERO4 camera from http://GoPro.com.
  
  The HERO4 features ultra high resolution quality of 4K at 30 frames per second + high frames rates at 1080p120. Incredible low light capabilities, including our new nightlapse setting. 2X the high fidelity sound. Faster processing. Protune settings that unlock manual control of many of your GoPro’s features, and so much more. Learn more and be inspired by the most advanced GoPro cameras yet: http://GoPro.com
  
  It’s your life. BE A HERO.
  
  MUSIC
  "Run Boy Run" performed by Woodkid
  Courtesy of Interscope Records under license from Universal Music Enterprises
  
  FEATURED CHARACTERS
  
  TOMORROWLAND (Boom, Belgium)
  Erin Edenholm
  Joanna Piotrowska
  Steve Aoki
  Krewella - Jahan Yousaf and Jasmine Yousaf
  Dimitri Vegas
  Like Mike
  
  LAVA LAKE (Ambrym Island, Vanuatu)
  Geoff Mackley
  Brad Ambrose
  
  ICEBERG CLIMB (Ilulissat, Greenland)
  Klemen Premrl
  Aljaz Anderle
  Thierry Dubois
  
  WILD MUSTANGS (Wells, Nevada)
  Clay Nannini
  
  JAPAN STREETS (Tokyo, Japan)
  Akira Nakai
  Shinichi Moroboshi
  Nanami Tsukamoto
  
  ORCA RESCUE (Whangarei, New Zealand)
  Dr. Ingrid Visser
  Terry Hardie
  Dian and her two baby orca
  
  
  SPECIAL THANKS
  Tomorrowland (http://www.tomorrowland.com)
  Michael Dujardin
  Vanuatu Heli (http://www.vanuatuhelicopters.com)
  Andy Martin
  Black Diamond (http://www.blackdiamondequipment.com)
  Madeline Pickens (http://mustangmonument.com) (http://savingamericasmustangs.org)
  Orca Research Trust (http://orcaresearch.org)
  Andy Casagrande (http://www.abc4explore.com/)
  Steve Hathaway
  Lily Kozman
        ARTIST : GoPro
        DATE : 20140929
        PURL : https://www.youtube.com/watch?v=wTcNtgA6gHs
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L5.1
        Format settings, CABAC : No
        Format settings, ReFrames : 2 frames
        Codec ID : V_MPEG4/ISO/AVC
        Duration : 4 min
        Bit rate : 18.7 Mb/s
        Width : 3 840 pixels
        Height : 2 160 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 29.970 (30000/1001) FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Bits/(Pixel*Frame) : 0.075
        Stream size : 566 MiB (97%)
        Default : Yes
        Forced : No
        Color range : Limited
        Color primaries : BT.709
        Transfer characteristics : BT.709
        Matrix coefficients : BT.709
        DURATION : 00:04:13.887000000
        HANDLER_NAME : VideoHandler
     Audio #2
        ID : 2
        Format : Vorbis
        Format settings, Floor : 1
        Codec ID : A_VORBIS
        Duration : 4 min
        Bit rate mode : Variable
        Bit rate : 128 kb/s
        Channel(s) : 2 channels
        Sampling rate : 44.1 kHz
        Compression mode : Lossy
        Stream size : 3.87 MiB (1%)
        Writing application : Google
        Language : English
        Default : Yes
        Forced : No
        DURATION : 00:04:13.906000000
  </code></pre>
  
  <p>File 2 :: Wonder Woman Trailer</p>
  
  <pre><code>C:\Users\Hackathon\Music\iTunes\iTunes Media\Automatically Add to iTunes\WONDER WOMAN Trailer #2 [2017] (Ultra-HD 4K).mp4
     General
        Complete name : C:\Users\Hackathon\Music\iTunes\iTunes Media\Automatically Add to iTunes\WONDER WOMAN Trailer #2 [2017] (Ultra-HD 4K).mp4
        Format : MPEG-4
        Format profile : Base Media
        Codec ID : isom (isom/iso2/avc1/mp41)
        File size : 222 MiB
        Duration : 2 min
        Overall bit rate : 11.5 Mb/s
        Movie name : WONDER WOMAN Trailer #2 [2017] (Ultra-HD 4K)
        Writing application : Lavf57.48.103
        Cover : Yes
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L5.1
        Format settings, CABAC : Yes
        Format settings, ReFrames : 4 frames
        Codec ID : avc1
        Codec ID/Info : Advanced Video Coding
        Duration : 2 min
        Bit rate : 11.3 Mb/s
        Width : 3 840 pixels
        Height : 2 160 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 25.000 FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Bits/(Pixel*Frame) : 0.055
        Stream size : 219 MiB (99%)
        Writing library : x264 core 148 r2705 3f5ed56
        Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
        Language : English
     Audio #2
        ID : 2
        Format : AAC
        Format/Info : Advanced Audio Codec
        Format profile : LC
        Codec ID : 40
        Duration : 2 min
        Bit rate mode : Constant
        Bit rate : 129 kb/s
        Channel(s) : 2 channels
        Channel positions : Front: L R
        Sampling rate : 48.0 kHz
        Frame rate : 46.875 FPS (1024 spf)
        Compression mode : Lossy
        Stream size : 2.49 MiB (1%)
        Language : English
        Default : Yes
        Alternate group : 1
  </code></pre>
  
  <hr>
  
  <h2>These two files did NOT play:</h2>
  
  <p>"In A Nutshell" video:</p>
  
  <pre><code>C:\Users\Hackathon\Videos\HD or 4k\Kurzgesagt – In a Nutshell\NA\NA - A New History for Humanity – The Human Era.mkv
     General
        Unique ID : 151773273920022300678100154581510254877 (0x722E78240BE681AAC8163B7BB9E3F11D)
        Complete name : C:\Users\Hackathon\Videos\HD or 4k\Kurzgesagt – In a Nutshell\NA\NA - A New History for Humanity – The Human Era.mkv
        Format : Matroska
        Format version : Version 4 / Version 2
        File size : 130 MiB
        Duration : 7 min
        Overall bit rate : 2 306 kb/s
        Movie name : A New History for Humanity – The Human Era
        Description : It is time to reframe how we think about our past.
  We need a new year 0 for humanity. But which one should we choose and why?
  
  
  
  http://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&amp;amp;tab=2
  
  A New History for Humanity – The Human Era
        Writing application : Lavf57.48.103
        Writing library : Lavf57.48.103 / Lavf57.48.103
        Comment : It is time to reframe how we think about our past.
  We need a new year 0 for humanity. But which one should we choose and why?
  
  
  THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US:
  
  Stuart Alldritt, Tasia Pele, Stan Serebryakov, Mike Janzen, Jason Heddle, August, Daniel Smith, Jonathan Herman, Rahul Rachuri, Piotr Gorzelany, Lisa Allcott, Горан Гулески, Eric Ziegast, Kean Drake, Friendly Stranger, NicoH, Adrian Rutkiewicz, Markus Klemm, Leandro Nascimento, Gary Chan, Shawhin Layeghi, Oscar Hernandez, Dale Prinsse, Vaclav Vyskocil, Sup3rW00t, Ryan Coonan, Tam Lerner, Dewi Cadat, Luis Aguirre, Andy McVey, Vexorum, Boris, Adam Wisniewski, Yannic Schreiber, Erik Lilly, Ellis, Dmitry Starostin, Akshay Joshi, Peter Tinti, kayle Clark, Mortimer Brewster, Marc Legault, Sumita Pal, Tarje Hellebust Jr., streetdragon95, Taratsamura, Sam Dickson, Bogdan Firicel, Saul Vera, Aaron Jacobs, Ben Arts, R B Dean, Kevin Beedon, Patrik Pärkinen, Duncan Graham, Johan Thomsen, Emily Tran, Adam Flanc, Adam Jermyn, Ali Uluyol
  
  Help us caption &amp; translate this video!
  
  http://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&amp;amp;tab=2
  
  A New History for Humanity – The Human Era
        ARTIST : Kurzgesagt – In a Nutshell
        DATE : 20161207
        PURL : https://www.youtube.com/watch?v=czgOWmtGVGs
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L4.2
        Format settings, CABAC : Yes
        Format settings, ReFrames : 3 frames
        Codec ID : V_MPEG4/ISO/AVC
        Duration : 7 min
        Width : 1 920 pixels
        Height : 1 080 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 60.000 FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Default : Yes
        Forced : No
        Color range : Limited
        Color primaries : BT.709
        Transfer characteristics : BT.709
        Matrix coefficients : BT.709
        DURATION : 00:07:52.447000000
        HANDLER_NAME : VideoHandler
     Audio #2
        ID : 2
        Format : Opus
        Codec ID : A_OPUS
        Duration : 7 min
        Channel(s) : 2 channels
        Channel positions : Front: L R
        Sampling rate : 48.0 kHz
        Compression mode : Lossy
        Delay relative to video : -14 ms
        Language : English
        Default : Yes
        Forced : No
        DURATION : 00:07:52.461000000
  </code></pre>
  
  <p>Finally a puppies video:</p>
  
  <pre><code>C:\Users\Hackathon\Videos\HD or 4k\Jacob   Katie Schwarz\NA\NA - PUPPIES BATH IN 4K (ULTRA HD).mkv
     General
        Unique ID : 172223577613529861860930485370882755628 (0x81910DF562C189096C7EE7D95D3A0C2C)
        Complete name : C:\Users\Hackathon\Videos\HD or 4k\Jacob   Katie Schwarz\NA\NA - PUPPIES BATH IN 4K (ULTRA HD).mkv
        Format : Matroska
        Format version : Version 4 / Version 2
        File size : 311 MiB
        Duration : 2 min
        Overall bit rate : 17.4 Mb/s
        Movie name : PUPPIES BATH IN 4K (ULTRA HD)
        Description : To view this video in 4K select "Original" in the resolution menu. If you're having trouble with 4K playback, try using different browsers, like Internet Explorer, Firefox or Google Chrome.
  
  Our friends just had puppies and we took the chance to film them this last weekend before they all left for new homes.
  
  This video was filmed and edited at 4K (4096x2304) resolution, four times greater than regular 1080p HD. All 4K file are available upon request. Shot on Red Epic.
  
  Follow us on twitter: http://www.twitter.com/jakeschwarz
  
  
  Tech spec:
  Red Epic (M642) w/ Ti Canon Mount
  16-35mm &amp; 50mm L-Series Lens
  Adobe Premiere CS6 and DaVinci Resolve
  
  Question or business inquires:
  contact@mysterybox.us
  
  Copyright © 2014 Mystery Box, LLC. All Rights Reserved.
        Writing application : Lavf57.48.103
        Writing library : Lavf57.48.103 / Lavf57.48.103
        Comment : To view this video in 4K select "Original" in the resolution menu. If you're having trouble with 4K playback, try using different browsers, like Internet Explorer, Firefox or Google Chrome.
  
  Our friends just had puppies and we took the chance to film them this last weekend before they all left for new homes.
  
  This video was filmed and edited at 4K (4096x2304) resolution, four times greater than regular 1080p HD. All 4K file are available upon request. Shot on Red Epic.
  
  Follow us on twitter: http://www.twitter.com/jakeschwarz
  
  
  Tech spec:
  Red Epic (M642) w/ Ti Canon Mount
  16-35mm &amp; 50mm L-Series Lens
  Adobe Premiere CS6 and DaVinci Resolve
  
  Question or business inquires:
  contact@mysterybox.us
  
  Copyright © 2014 Mystery Box, LLC. All Rights Reserved.
        ARTIST : Jacob   Katie Schwarz
        DATE : 20120922
        PURL : https://www.youtube.com/watch?v=SMwxZO2UjBw
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L5.1
        Format settings, CABAC : No
        Format settings, ReFrames : 2 frames
        Codec ID : V_MPEG4/ISO/AVC
        Duration : 2 min
        Width : 4 096 pixels
        Height : 2 304 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 24.000 FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Default : Yes
        Forced : No
        DURATION : 00:02:29.651000000
        HANDLER_NAME : VideoHandler
     Audio #2
        ID : 2
        Format : Opus
        Codec ID : A_OPUS
        Duration : 2 min
        Channel(s) : 2 channels
        Channel positions : Front: L R
        Sampling rate : 48.0 kHz
        Compression mode : Lossy
        Delay relative to video : -7 ms
        Language : English
        Default : Yes
        Forced : No
        DURATION : 00:02:29.661000000
  </code></pre>
  
  <p>I thought it couldn't play .mkv so I converted File 2 to mp4 (using ffmpeg) which <em>worked</em>. But surprisingly, File 1 also worked without conversion so format isn't an issue. But then all the codecs look that same for me. What am I missing?</p>
  
  <p>Thanks!</p>
  
Tags: <codec><4k><avchd><h.264><h265>
Title: .mkv file not playing in HEVC/H.265 supported player
UserDisplayName: Macindows
ThreadText: # .mkv file not playing in HEVC/H.265 supported player
  
  (Asked by: username_0 on 2017-02-02)
  
  I wanted to play UHD (4k) videos in my new LeTV ([Super3 X55](http://www.lemall.com/us/product/x355.html)).
  
  So I used [youtube-dl](https://github.com/rg3/youtube-dl) to download 4k YouTube videos (which are humongous btw) but for some reason most of them do not play.
  
  The TV's website specifically states:
  
  > HEVC/H.265 hardware video decoding, up to 4K@60fps
  
  But only a few files play. I'm thinking the issue is something to do with codecs or formats.
  
  So I compared the info of files which *did* play with those that didn't. But I can't figure out the difference. Here are two files which played and two that didn't.
  
  ---
  
  ## These two files played beautifully:
  
  File 1 :: GoPro video
  
  ```
  C:\Users\Hackathon\Videos\HD or 4k\GoPro\NA\NA - GoPro HERO4 - The Adventure of Life in 4K.mkv
     General
        Unique ID : 98713554682895442793938602234209693471 (0x4A438A01ACFC3EF5104AF4D6A778EF1F)
        Complete name : C:\Users\Hackathon\Videos\HD or 4k\GoPro\NA\NA - GoPro HERO4 - The Adventure of Life in 4K.mkv
        Format : Matroska
        Format version : Version 4 / Version 2
        File size : 581 MiB
        Duration : 4 min
        Overall bit rate mode : Variable
        Overall bit rate : 19.2 Mb/s
        Movie name : GoPro HERO4: The Adventure of Life in 4K
        Description : All around the world GoPro users are capturing incredible experiences, from the heart-stopping to the heartfelt. Into the caldron of an active volcano, the neon streets of Japan, a refuge for wild mustangs, scaling an iceberg, the world’s biggest dance party, or a whale rescue mission, GoPros have documented every moment. See how GoPro’s new line of our most advanced cameras ever allow you to beautifully and authentically capture and share the experiences that bring purpose, adventure, and joy to your life.
  
  Shot 100% on the new GoPro HERO4 camera from http://GoPro.com.
  
  The HERO4 features ultra high resolution quality of 4K at 30 frames per second + high frames rates at 1080p120. Incredible low light capabilities, including our new nightlapse setting. 2X the high fidelity sound. Faster processing. Protune settings that unlock manual control of many of your GoPro’s features, and so much more. Learn more and be inspired by the most advanced GoPro cameras yet: http://GoPro.com
  
  It’s your life. BE A HERO.
  
  MUSIC
  "Run Boy Run" performed by Woodkid
  Courtesy of Interscope Records under license from Universal Music Enterprises
  
  FEATURED CHARACTERS
  
  TOMORROWLAND (Boom, Belgium)
  Erin Edenholm
  Joanna Piotrowska
  Steve Aoki
  Krewella - Jahan Yousaf and Jasmine Yousaf
  Dimitri Vegas
  Like Mike
  
  LAVA LAKE (Ambrym Island, Vanuatu)
  Geoff Mackley
  Brad Ambrose
  
  ICEBERG CLIMB (Ilulissat, Greenland)
  Klemen Premrl
  Aljaz Anderle
  Thierry Dubois
  
  WILD MUSTANGS (Wells, Nevada)
  Clay Nannini
  
  JAPAN STREETS (Tokyo, Japan)
  Akira Nakai
  Shinichi Moroboshi
  Nanami Tsukamoto
  
  ORCA RESCUE (Whangarei, New Zealand)
  Dr. Ingrid Visser
  Terry Hardie
  Dian and her two baby orca
  
  SPECIAL THANKS
  Tomorrowland (http://www.tomorrowland.com)
  Michael Dujardin
  Vanuatu Heli (http://www.vanuatuhelicopters.com)
  Andy Martin
  Black Diamond (http://www.blackdiamondequipment.com)
  Madeline Pickens (http://mustangmonument.com) (http://savingamericasmustangs.org)
  Orca Research Trust (http://orcaresearch.org)
  Andy Casagrande (http://www.abc4explore.com/)
  Steve Hathaway
  Lily Kozman
        ARTIST : GoPro
        DATE : 20140929
        PURL : https://www.youtube.com/watch?v=wTcNtgA6gHs
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L5.1
        Format settings, CABAC : No
        Format settings, ReFrames : 2 frames
        Codec ID : V_MPEG4/ISO/AVC
        Duration : 4 min
        Bit rate : 18.7 Mb/s
        Width : 3 840 pixels
        Height : 2 160 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 29.970 (30000/1001) FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Bits/(Pixel*Frame) : 0.075
        Stream size : 566 MiB (97%)
        Default : Yes
        Forced : No
        Color range : Limited
        Color primaries : BT.709
        Transfer characteristics : BT.709
        Matrix coefficients : BT.709
        DURATION : 00:04:13.887000000
        HANDLER_NAME : VideoHandler
     Audio #2
        ID : 2
        Format : Vorbis
        Format settings, Floor : 1
        Codec ID : A_VORBIS
        Duration : 4 min
        Bit rate mode : Variable
        Bit rate : 128 kb/s
        Channel(s) : 2 channels
        Sampling rate : 44.1 kHz
        Compression mode : Lossy
        Stream size : 3.87 MiB (1%)
        Writing application : Google
        Language : English
        Default : Yes
        Forced : No
        DURATION : 00:04:13.906000000
  
  ```
  
  File 2 :: Wonder Woman Trailer
  
  ```
  C:\Users\Hackathon\Music\iTunes\iTunes Media\Automatically Add to iTunes\WONDER WOMAN Trailer #2 [2017] (Ultra-HD 4K).mp4
     General
        Complete name : C:\Users\Hackathon\Music\iTunes\iTunes Media\Automatically Add to iTunes\WONDER WOMAN Trailer #2 [2017] (Ultra-HD 4K).mp4
        Format : MPEG-4
        Format profile : Base Media
        Codec ID : isom (isom/iso2/avc1/mp41)
        File size : 222 MiB
        Duration : 2 min
        Overall bit rate : 11.5 Mb/s
        Movie name : WONDER WOMAN Trailer #2 [2017] (Ultra-HD 4K)
        Writing application : Lavf57.48.103
        Cover : Yes
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L5.1
        Format settings, CABAC : Yes
        Format settings, ReFrames : 4 frames
        Codec ID : avc1
        Codec ID/Info : Advanced Video Coding
        Duration : 2 min
        Bit rate : 11.3 Mb/s
        Width : 3 840 pixels
        Height : 2 160 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 25.000 FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Bits/(Pixel*Frame) : 0.055
        Stream size : 219 MiB (99%)
        Writing library : x264 core 148 r2705 3f5ed56
        Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
        Language : English
     Audio #2
        ID : 2
        Format : AAC
        Format/Info : Advanced Audio Codec
        Format profile : LC
        Codec ID : 40
        Duration : 2 min
        Bit rate mode : Constant
        Bit rate : 129 kb/s
        Channel(s) : 2 channels
        Channel positions : Front: L R
        Sampling rate : 48.0 kHz
        Frame rate : 46.875 FPS (1024 spf)
        Compression mode : Lossy
        Stream size : 2.49 MiB (1%)
        Language : English
        Default : Yes
        Alternate group : 1
  
  ```
  
  ---
  
  ## These two files did NOT play:
  
  "In A Nutshell" video:
  
  ```
  C:\Users\Hackathon\Videos\HD or 4k\Kurzgesagt – In a Nutshell\NA\NA - A New History for Humanity – The Human Era.mkv
     General
        Unique ID : 151773273920022300678100154581510254877 (0x722E78240BE681AAC8163B7BB9E3F11D)
        Complete name : C:\Users\Hackathon\Videos\HD or 4k\Kurzgesagt – In a Nutshell\NA\NA - A New History for Humanity – The Human Era.mkv
        Format : Matroska
        Format version : Version 4 / Version 2
        File size : 130 MiB
        Duration : 7 min
        Overall bit rate : 2 306 kb/s
        Movie name : A New History for Humanity – The Human Era
        Description : It is time to reframe how we think about our past.
  We need a new year 0 for humanity. But which one should we choose and why?
  
  http://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&amp;tab=2
  
  A New History for Humanity – The Human Era
        Writing application : Lavf57.48.103
        Writing library : Lavf57.48.103 / Lavf57.48.103
        Comment : It is time to reframe how we think about our past.
  We need a new year 0 for humanity. But which one should we choose and why?
  
  THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US:
  
  Stuart Alldritt, Tasia Pele, Stan Serebryakov, Mike Janzen, Jason Heddle, August, Daniel Smith, Jonathan Herman, Rahul Rachuri, Piotr Gorzelany, Lisa Allcott, Горан Гулески, Eric Ziegast, Kean Drake, Friendly Stranger, NicoH, Adrian Rutkiewicz, Markus Klemm, Leandro Nascimento, Gary Chan, Shawhin Layeghi, Oscar Hernandez, Dale Prinsse, Vaclav Vyskocil, Sup3rW00t, Ryan Coonan, Tam Lerner, Dewi Cadat, Luis Aguirre, Andy McVey, Vexorum, Boris, Adam Wisniewski, Yannic Schreiber, Erik Lilly, Ellis, Dmitry Starostin, Akshay Joshi, Peter Tinti, kayle Clark, Mortimer Brewster, Marc Legault, Sumita Pal, Tarje Hellebust Jr., streetdragon95, Taratsamura, Sam Dickson, Bogdan Firicel, Saul Vera, Aaron Jacobs, Ben Arts, R B Dean, Kevin Beedon, Patrik Pärkinen, Duncan Graham, Johan Thomsen, Emily Tran, Adam Flanc, Adam Jermyn, Ali Uluyol
  
  Help us caption & translate this video!
  
  http://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&amp;tab=2
  
  A New History for Humanity – The Human Era
        ARTIST : Kurzgesagt – In a Nutshell
        DATE : 20161207
        PURL : https://www.youtube.com/watch?v=czgOWmtGVGs
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L4.2
        Format settings, CABAC : Yes
        Format settings, ReFrames : 3 frames
        Codec ID : V_MPEG4/ISO/AVC
        Duration : 7 min
        Width : 1 920 pixels
        Height : 1 080 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 60.000 FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Default : Yes
        Forced : No
        Color range : Limited
        Color primaries : BT.709
        Transfer characteristics : BT.709
        Matrix coefficients : BT.709
        DURATION : 00:07:52.447000000
        HANDLER_NAME : VideoHandler
     Audio #2
        ID : 2
        Format : Opus
        Codec ID : A_OPUS
        Duration : 7 min
        Channel(s) : 2 channels
        Channel positions : Front: L R
        Sampling rate : 48.0 kHz
        Compression mode : Lossy
        Delay relative to video : -14 ms
        Language : English
        Default : Yes
        Forced : No
        DURATION : 00:07:52.461000000
  
  ```
  
  Finally a puppies video:
  
  ```
  C:\Users\Hackathon\Videos\HD or 4k\Jacob   Katie Schwarz\NA\NA - PUPPIES BATH IN 4K (ULTRA HD).mkv
     General
        Unique ID : 172223577613529861860930485370882755628 (0x81910DF562C189096C7EE7D95D3A0C2C)
        Complete name : C:\Users\Hackathon\Videos\HD or 4k\Jacob   Katie Schwarz\NA\NA - PUPPIES BATH IN 4K (ULTRA HD).mkv
        Format : Matroska
        Format version : Version 4 / Version 2
        File size : 311 MiB
        Duration : 2 min
        Overall bit rate : 17.4 Mb/s
        Movie name : PUPPIES BATH IN 4K (ULTRA HD)
        Description : To view this video in 4K select "Original" in the resolution menu. If you're having trouble with 4K playback, try using different browsers, like Internet Explorer, Firefox or Google Chrome.
  
  Our friends just had puppies and we took the chance to film them this last weekend before they all left for new homes.
  
  This video was filmed and edited at 4K (4096x2304) resolution, four times greater than regular 1080p HD. All 4K file are available upon request. Shot on Red Epic.
  
  Follow us on twitter: http://www.twitter.com/jakeschwarz
  
  Tech spec:
  Red Epic (M642) w/ Ti Canon Mount
  16-35mm & 50mm L-Series Lens
  Adobe Premiere CS6 and DaVinci Resolve
  
  Question or business inquires:
  contact@mysterybox.us
  
  Copyright © 2014 Mystery Box, LLC. All Rights Reserved.
        Writing application : Lavf57.48.103
        Writing library : Lavf57.48.103 / Lavf57.48.103
        Comment : To view this video in 4K select "Original" in the resolution menu. If you're having trouble with 4K playback, try using different browsers, like Internet Explorer, Firefox or Google Chrome.
  
  Our friends just had puppies and we took the chance to film them this last weekend before they all left for new homes.
  
  This video was filmed and edited at 4K (4096x2304) resolution, four times greater than regular 1080p HD. All 4K file are available upon request. Shot on Red Epic.
  
  Follow us on twitter: http://www.twitter.com/jakeschwarz
  
  Tech spec:
  Red Epic (M642) w/ Ti Canon Mount
  16-35mm & 50mm L-Series Lens
  Adobe Premiere CS6 and DaVinci Resolve
  
  Question or business inquires:
  contact@mysterybox.us
  
  Copyright © 2014 Mystery Box, LLC. All Rights Reserved.
        ARTIST : Jacob   Katie Schwarz
        DATE : 20120922
        PURL : https://www.youtube.com/watch?v=SMwxZO2UjBw
     Video #1
        ID : 1
        Format : AVC
        Format/Info : Advanced Video Codec
        Format profile : High@L5.1
        Format settings, CABAC : No
        Format settings, ReFrames : 2 frames
        Codec ID : V_MPEG4/ISO/AVC
        Duration : 2 min
        Width : 4 096 pixels
        Height : 2 304 pixels
        Display aspect ratio : 16:9
        Frame rate mode : Constant
        Frame rate : 24.000 FPS
        Color space : YUV
        Chroma subsampling : 4:2:0
        Bit depth : 8 bits
        Scan type : Progressive
        Default : Yes
        Forced : No
        DURATION : 00:02:29.651000000
        HANDLER_NAME : VideoHandler
     Audio #2
        ID : 2
        Format : Opus
        Codec ID : A_OPUS
        Duration : 2 min
        Channel(s) : 2 channels
        Channel positions : Front: L R
        Sampling rate : 48.0 kHz
        Compression mode : Lossy
        Delay relative to video : -7 ms
        Language : English
        Default : Yes
        Forced : No
        DURATION : 00:02:29.661000000
  
  ```
  
  I thought it couldn't play .mkv so I converted File 2 to mp4 (using ffmpeg) which *worked*. But surprisingly, File 1 also worked without conversion so format isn't an issue. But then all the codecs look that same for me. What am I missing?
  
  Thanks!
  
  **Tags:** codec, 4k, avchd, h.264, h265
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2017-02-02. Score: 4 | Accepted answer
  
  Both files that don't play feature Opus as the audio codec. As per this [site](http://www.reviewcenter.in/4876/leeco-super3-x55-smart-tv-specifications-features-price/), Opus is not one of the supported audio codecs.
  
  Transcode the audio:
  
  ```
  ffmpeg -i in.mkv -c:v copy out.mkv
  
  ```
  
  > **Comments:**
  > **username_0**: Wow. That was a good catch. Those specs weren't available even in their home site. Cool you could discover it.  
  
  ---
  
  