With full screen i mean playing the video in 1080p 60fps.

Could you try with the --disable-zero-copy-dxgi-video command-line flag instead of using #disable-accelerated-video-decode ?

I tried, but it didn't help.

I should also add that the audio of the video also goes out of sync the moment the dropped frames are happening (with or without the command-line flag btw).

tom19866@gmail.com, do you mean this issue only repro with hardware decoding? if yes, what graphic card are you using?
I use NVidia graphic card, I don't see this issue with Chrome 54.0.2840.14, drop rate is consistently at 0.5%, no visible stuttering is observed.

I think yes?

It's hard to say at this point, because right now I don't have a spare graphics card laying around to verify if the problem is really the card. 

I'm using a Geforce GTX 650 Ti with the latest drivers.

I tried to roll back to version 362.00 since people refer that as a stable driver, but sadly the dropped frames were still there.

It's funny since I never ever had any problems with my pc. Everything is up-to-date, temps are perfect, no strange cpu usage, games play perfectly and yet I get huge dropped frames on this particular youtube video.

And it does not happen with the vp9 codec. It seems it only happens when the video has the avc1.64002a codec. Really strange.

But the moment I disable #disable-accelerated-video-decode everything is okay again, no hiccups, everything butter smooth.

I wish I could be more of a help, but I don't know what to do right now.

So if you want more information of any kind, please say so. I'll do my best to  try to help.

So today I replaced my videocard with a GTX 750 Ti and the problem still persists.

What to do next? Is Chrome HW decoding bugged?

Yesterday I did a full format of my SSD and after that the problem was STILL there.

That really tells that something is definitely wrong with Chrome's HW decoding.

Please look into this. If you need any further information, please let me know.

Thank you for providing more feedback. Adding requester "yiningc@chromium.org" for another review and adding "Needs-Review" label for tracking.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

sandersd@, can you take a look? this issue seems specific to Geforce GTX 650/750 Ti. I don't see it repro on my NVidia Graphic card.

Tom: I have a GTX 750 Ti available, but no Windows 7 box to put it in. I will see about reproducing your issue in the near future.

In the meantime, some clarifications:
  - Is only fullscreen affected, or can you reproduce the behavior by explicitly selecting "1080p60" in the quality menu?
  - Do you have more than one attached display?
  - Does disabling/enabling Aero affect your result?
  - Does the issue reproduce with Chrome Canary?
  - Your GPU information lists:

      Disabled Features: rasterization
      Disabled Features: native_gpu_memory_buffers

    Can you post the contents of chrome://version to help clarify those? (Ideally both that and chrome://gpu from Chrome Dev or Chrome Canary.)

Thanks!

tom19866@: I noticed while looking at these examples that MSE doesn't like the edit list very much. I've prepared some 30s samples of the 1080p30 version of the video, can you also report which (if any) of these exhibit the issue you described?

    https://storage.googleapis.com/sandersd/crb644225/a.html
    https://storage.googleapis.com/sandersd/crb644225/b.html
    https://storage.googleapis.com/sandersd/crb644225/c.html

Thanks a lot for giving this issue a serious examination.

Before you guys commented, I have been testing things out to reproduce the problem.

So far I've concluded that if I don't move my mouse while the video is playing everything is stutter free with no dropped frames.

But the moment I move my mouse and the youtube 'video player' starts to show up then the video is instantly dropping frames and starts to stutter heavily.

This means that the 'video player' is causing some interference which causes the video to drop frames. Very strange.  

With Aero on (like sandersd asked) everything is smooth when I move the mouse around and there aren't any massive dropped frames anymore. There still are some frames dropped though. And when that happens the sound also stops for a mili second, like a hiccup, resulting in dropped frames again. Also very annoying.

Your samples are stutter free sandersd. With or without Aero enabled. Butter smooth!

I did not try Chrome Canary yet. I will try that out later.

I only have one display attached. 

Yes, only fullscreen is affected with this particular codec.

I've just found out that if I watch any -> 1080p 60fps <- video (exlcuding the avc codec, which plays smooth in window mode) on youtube ( for example: https://www.youtube.com/watch?v=rql_F8H3h9E with the vp9 codec) fullscreen or not, both way they start to drop frames eventually. Like every 20 seconds or so you see the dropped frames adding up by 10, resulting in a short noticable stutter. This happens with both Aero on or off.

My Chrome version:


Google Chrome	53.0.2785.116 (Officiële build) m (64-bits)
Revisie	3f9c628bfd1de2c62de1ea41d0707d06cc760061-refs/branch-heads/2785@{#886}
Besturingssysteem	Windows 
Blink	537.36 (@3f9c628bfd1de2c62de1ea41d0707d06cc760061)
JavaScript	V8 5.3.332.45
Flash	(Uitgeschakeld)
User-agent	Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Opdrachtregel	"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" --flag-switches-begin --flag-switches-end
Uitvoerbaar pad	C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
Profielpad	C:\Users\Tom\AppData\Local\Google\Chrome\User Data\Default
Varianten	6a89113b-30be434a
b3888d8d-afba0f91
7c1bc906-f55a7974
ba3f87da-92cc81ec
f049a919-3f4a17df
f15c1c09-ca7d8d80
db19c37b-4ad60575
93731dca-3f4a17df
9e5c75f1-c16ec2e6
f79cb77b-3d47f4f4
b7786474-d93a0620
868bda90-ca7d8d80
4ea303a6-16fb4946
7aa46da5-8279be7
9736de91-ca7d8d80
dbffab5d-ca7d8d80
867c4c68-ca7d8d80
6844d8aa-669a04e0
f47ae82a-746c2ad4
3ac60855-486e2a9c
f296190c-6754d7b7
4442aae2-a5822863
ed1d377-e1cc0f14
75f0f0a0-d7f6b13c
e2b18481-6e3b1976
e7e71889-e1cc0f14
Compiler	MSVC 2015

My Chrome GPU again:

Graphics Feature Status
Canvas: Hardware accelerated
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Enabled
Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
Rasterization: Software only. Hardware acceleration disabled
Video Decode: Hardware accelerated
Video Encode: Hardware accelerated
WebGL: Hardware accelerated
Driver Bug Workarounds
clear_uniforms_before_first_program_use
disable_direct_composition
disable_discard_framebuffer
disable_dxgi_zero_copy_video
disable_framebuffer_cmaa
exit_on_context_lost
force_cube_complete
scalarize_vec_and_mat_constructor_args
texsubimage_faster_than_teximage
use_current_program_after_successful_link
Problems Detected
Always call glUseProgram after a successful link to avoid a driver bug:  349137 
Applied Workarounds: use_current_program_after_successful_link
Some drivers are unable to reset the D3D device in the GPU process sandbox
Applied Workarounds: exit_on_context_lost
TexSubImage is faster for full uploads on ANGLE
Applied Workarounds: texsubimage_faster_than_teximage
Clear uniforms before first program use on all platforms: 124764, 349137
Applied Workarounds: clear_uniforms_before_first_program_use
Always rewrite vec/mat constructors to be consistent: 398694
Applied Workarounds: scalarize_vec_and_mat_constructor_args
ANGLE crash on glReadPixels from incomplete cube map texture: 518889
Applied Workarounds: force_cube_complete
Framebuffer discarding can hurt performance on non-tilers: 570897
Applied Workarounds: disable_discard_framebuffer
Direct composition flashes black initially on Win <10: 588588
Applied Workarounds: disable_direct_composition
Zero copy DXGI video hangs on shutdown on Win < 8.1: 621190
Applied Workarounds: disable_dxgi_zero_copy_video
Limited enabling of Chromium GL_INTEL_framebuffer_CMAA: 535198
Applied Workarounds: disable_framebuffer_cmaa
Accelerated rasterization has been disabled, either via blacklist, about:flags or the command line.
Disabled Features: rasterization
Native GpuMemoryBuffers have been disabled, either via about:flags or command line.
Disabled Features: native_gpu_memory_buffers
Version Information
Data exported	29-9-2016 20:29:30
Chrome version	Chrome/53.0.2785.116
Operating system	Windows NT 6.1.7601 SP1
Software rendering list version	11.7
Driver bug list version	8.93
ANGLE commit id	c9e893119842
2D graphics backend	Skia
Command Line Args	Files (x86)\Google\Chrome\Application\chrome.exe" --flag-switches-begin --flag-switches-end
Driver Information
Initialization time	23
In-process GPU	false
Sandboxed	false
GPU0	VENDOR = 0x10de, DEVICE= 0x11c6
Optimus	false
AMD switchable	false
Desktop compositing	Aero Glass
Diagonal Monitor Size of \\.\DISPLAY1	23.0"
Driver vendor	NVIDIA
Driver version	21.21.13.7290
Driver date	9-16-2016
Pixel shader version	5.0
Vertex shader version	5.0
Max. MSAA samples	8
Machine model name	
Machine model version	
GL_VENDOR	Google Inc.
GL_RENDERER	ANGLE (NVIDIA GeForce GTX 650 Ti Direct3D11 vs_5_0 ps_5_0)
GL_VERSION	OpenGL ES 2.0 (ANGLE 2.1.0.c9e893119842)
GL_EXTENSIONS	GL_OES_element_index_uint GL_OES_packed_depth_stencil GL_OES_get_program_binary GL_OES_rgb8_rgba8 GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra GL_NV_pixel_buffer_object GL_OES_mapbuffer GL_EXT_map_buffer_range GL_EXT_color_buffer_half_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_float GL_OES_texture_float_linear GL_EXT_texture_rg GL_EXT_texture_compression_dxt1 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_OES_compressed_ETC1_RGB8_texture GL_EXT_sRGB GL_ANGLE_depth_texture GL_OES_depth32 GL_EXT_texture_storage GL_OES_texture_npot GL_EXT_draw_buffers GL_EXT_texture_filter_anisotropic GL_EXT_occlusion_query_boolean GL_NV_fence GL_EXT_disjoint_timer_query GL_EXT_robustness GL_EXT_blend_minmax GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_pack_reverse_row_order GL_OES_standard_derivatives GL_EXT_shader_texture_lod GL_EXT_frag_depth GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_EXT_discard_framebuffer GL_EXT_debug_marker GL_OES_EGL_image GL_OES_EGL_image_external GL_NV_EGL_stream_consumer_external GL_EXT_unpack_subimage GL_NV_pack_subimage GL_OES_vertex_array_object GL_KHR_debug GL_ANGLE_lossy_etc_decode GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_sync_query
Disabled Extensions	
Window system binding vendor	Google Inc. (adapter LUID: 0000000000008ed0)
Window system binding version	1.4 (ANGLE 2.1.0.c9e893119842)
Window system binding extensions	EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility
Direct rendering	Yes
Reset notification strategy	0x8252
GPU process crash count	0
Compositor Information
Tile Update Mode	One-copy
Partial Raster	Enabled
GpuMemoryBuffers Status
ATC	Software only
ATCIA	Software only
DXT1	Software only
DXT5	Software only
ETC1	Software only
R_8	Software only
BGR_565	Software only
RGBA_4444	Software only
RGBX_8888	Software only
RGBA_8888	Software only
BGRX_8888	Software only
BGRA_8888	Software only
YVU_420	Software only
YUV_420_BIPLANAR	Software only
UYVY_422	Software only
Diagnostics
0
b3DAccelerationEnabled	true
b3DAccelerationExists	true
bAGPEnabled	true
bAGPExistenceValid	true
bAGPExists	true
bCanRenderWindow	true
bDDAccelerationEnabled	true
bDriverBeta	false
bDriverDebug	false
bDriverSigned	false
bDriverSignedValid	false
bNoHardware	false
dwBpp	32
dwDDIVersion	11
dwHeight	1080
dwRefreshRate	60
dwWHQLLevel	0
dwWidth	1920
iAdapter	0
lDriverSize	17464952
lMiniVddSize	0
szAGPStatusEnglish	Enabled
szAGPStatusLocalized	Ingeschakeld
szChipType	GeForce GTX 650 Ti
szD3DStatusEnglish	Enabled
szD3DStatusLocalized	Ingeschakeld
szDACType	Integrated RAMDAC
szDDIVersionEnglish	11
szDDIVersionLocalized	11
szDDStatusEnglish	Enabled
szDDStatusLocalized	Ingeschakeld
szDXVAHDEnglish	Supported
szDXVAModes	ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C
szDescription	NVIDIA GeForce GTX 650 Ti
szDeviceId	0x11C6
szDeviceIdentifier	{D7B71E3E-5286-11CF-896F-27A41BC2D835}
szDeviceName	\\.\DISPLAY1
szDisplayMemoryEnglish	4043 MB
szDisplayMemoryLocalized	4043 MB
szDisplayModeEnglish	1920 x 1080 (32 bit) (60Hz)
szDisplayModeLocalized	1920 x 1080 (32 bit) (60Hz)
szDriverAssemblyVersion	21.21.13.7290
szDriverAttributes	Final Retail
szDriverDateEnglish	9/17/2016 02:46:09
szDriverDateLocalized	17-9-2016 2:46:09
szDriverLanguageEnglish	English
szDriverLanguageLocalized	Engels
szDriverModelEnglish	WDDM 1.1
szDriverModelLocalized	WDDM 1.1
szDriverName	nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
szDriverNodeStrongName	oem24.inf:NVIDIA_Devices.NTamd64.6.1:Section032:21.21.13.7290:pci\ven_10de&dev_11c6
szDriverSignDate	
szDriverVersion	21.21.0013.7290
szKeyDeviceID	Enum\PCI\VEN_10DE&DEV_11C6&SUBSYS_842A1043&REV_A1
szKeyDeviceKey	\Registry\Machine\System\CurrentControlSet\Control\Video\{99AFB0DB-EF52-4B9B-84B4-58306EE2AF5B}\0000
szManufacturer	NVIDIA
szMiniVdd	n.v.t.
szMiniVddDateEnglish	n/a
szMiniVddDateLocalized	n.v.t.
szMonitorMaxRes	
szMonitorName	Algemeen PnP-beeldscherm
szNotesEnglish	No problems found.
szNotesLocalized	Geen problemen gevonden.
szOverlayEnglish	Supported
szRankOfInstalledDriver	00E62001
szRegHelpText	
szRevision	
szRevisionId	0x00A1
szSubSysId	0x842A1043
szTestResultD3D7English	Not run
szTestResultD3D7Localized	Niet uitgevoerd
szTestResultD3D8English	Not run
szTestResultD3D8Localized	Niet uitgevoerd
szTestResultD3D9English	Not run
szTestResultD3D9Localized	Niet uitgevoerd
szTestResultDDEnglish	Not run
szTestResultDDLocalized	Niet uitgevoerd
szVdd	n.v.t.
szVendorId	0x10DE
Log Messages
[3304:1368:0929/174933:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/175346:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/180408:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/180722:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/180755:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/180913:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/180918:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/181021:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/181352:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/181354:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/181655:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/182034:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/182355:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/182537:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/182538:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/182543:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/182921:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/183329:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/183819:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/183834:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/183837:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/183840:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/184112:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/184332:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/184812:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/185309:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/185327:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/185909:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/190250:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/190335:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/191503:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/192616:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/192648:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/192716:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/192826:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/192941:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/192944:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/193300:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/193914:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/194335:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/195033:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/195507:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/195825:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/195842:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/195906:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/200241:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
[3304:1368:0929/202409:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12
GpuProcessHostUIShim: The GPU process exited normally. Everything is okay.

If you guys need any more information, please let me know.

Tomorrow I'll try to test out the Canary version of Chrome to see if that makes any difference.

tom: Your recent results are consistent with an underpowered CPU. However, your system specs should be entirely adequate for this use case.

One clarification:
  - You describe audio sync issues. Do these recover over time?

The next step then is to explore possible performance issues:
  - Are there processes listed in the task manager that use a lot of CPU while playing back, or that have accumulated a large "CPU Time" total overall?
  - Does DPC Latency Checker (http://www.thesycon.de/deu/latency_check.shtml) identify any problematic device drivers?

Thank you for the quick reply.
 
[quote]However, your system specs should be entirely adequate for this use case.[/quote]

Indeed! I never ever have encountered problems besides this right now.

Never had a BSOD/weird errors, games play perfectly, temps are great. Anyway I'm not saying it could be my CPU, but I highly doubt it.

- You describe audio sync issues. Do these recover over time?

Yes, it only goes briefly out of sync when the youtube video player pops up when I move my mouse over the screen. The moment when I dont touch my mouse anymore and the video player starts to disappear everything goes back to normal again.

- Are there processes listed in the task manager that use a lot of CPU while playing back, or that have accumulated a large "CPU Time" total

In task manager I clicked 'Always on top' so I could see what the maxium usasge was when it stutters/dropping frames on ( https://www.youtube.com/watch?v=DiujnShjAbk ) in fullscreen and it never went above 10%. It bounced from 5% to 8% etc. Nothing major in my opinion.
When I didn't touched my mouse it was using only 1 to 2% CPU usage.

- Does DPC Latency Checker

The results: http://imgur.com/a/jxNDY

Don't hesitate to ask me anything. I'll try my best to help! We need to get to the bottom of this! :)

You might try launching chrome with --disable-extensions to ensure something isn't messing with your page.

- Are there processes listed in the task manager that use a lot of CPU while playing back, or that have accumulated a large "CPU Time" total

I've read your question a bit to fast in my previous post, leaving not the correct answer for it.

The real answer to this question is: No. CPU usage is always on 0%

@dalecur

Just tried that, didn't help. Any other suggestions? 

Thanks!

I can safely say that turning Aero on solves the problem for the most.

Weird though that Chrome doesn't like Windows 7 Classic theme.

With the classic theme you also see a lot of tearing, while using Aero there is none.

Is there a way to turn on Aero while you are using the classic theme?

Since I always have a weak point for the classic theme. It's so easy on the eyes. 

Are you guys also using Aero? I mean you should try the classic theme once and check the same video again. Most likely you will notice the dropped frames then.

One more thing. In the Chrome GPU log there are still some errors which I can't figure out how to solve them.

This is the error I'm talking about:

[2508:4028:1001/125016:ERROR:gpu_video_decode_accelerator.cc(365)] : HW video decode not available for profile 12

What causes this error? Is it bad? Is there a way to fix this error?

That error is normal (probably should not be labelled ERROR). It means that hardware decoding is not enabled for VPx content.

Just a heads up, but every video plays okay again!

There is one thing though and right now in the GPU log I am seeing this error:

[3588:1296:1024/195111:ERROR:mf_helpers.cc(12)] : Error in dxva_video_decode_accelerator_win.cc on line 345

What does this mean? It's not coming from watching videos on Youtube.

If I watch a video on e.g. Liveleak then this error pops up in the log.

Does anyone know what's causing this?

Chrome version: 54.0.2840.71 m (64-bit)

Geforce driver: 373.06

Cleaning up "Needs-Review" label as we are not using this label for triage anymore. Ref bug for this cleanup 684919

@tom , can you attach your dxdiag text file here 

Assuming this was resolved.