Chromium doesn't show the video feed from a second webcam
Reported by
rath...@gmail.com,
Jul 6
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Issue descriptionUserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.79 Safari/537.36 Example URL: https://vmr.citi.com/webapp/ Steps to reproduce the problem: 1. Go to https://vmr.citi.com/webapp/ and click Settings 2. Select second connected webcam and save 3. Enter a meeting address (not public, will provide info upon request) 4. Join as guest What is the expected behavior? Video feed from the selected webcam is transmitted (and visible in "my own video" window). What went wrong? Video feed from the internal laptop camera is transmitted which is all black when the lid is closed. It doesn't make any difference which webcam I choose in the settings. Did this work before? N/A Is it a problem with Flash or HTML5? N/A Does this work in other browsers? N/A Chrome version: 67.0.3396.79 Channel: stable OS Version: Fedora 28 Flash Version: Not installed Contents of chrome://gpu: Graphics Feature Status Canvas: Hardware accelerated CheckerImaging: Disabled 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: Hardware accelerated Surface Synchronization: Enabled Video Decode: Hardware accelerated Viz Service Display Compositor: Disabled WebGL: Hardware accelerated WebGL2: Hardware accelerated Driver Bug Workarounds adjust_src_dst_region_for_blitframebuffer clear_uniforms_before_first_program_use count_all_in_varyings_packing decode_encode_srgb_for_generatemipmap disable_framebuffer_cmaa disable_post_sub_buffers_for_onscreen_surfaces msaa_is_slow scalarize_vec_and_mat_constructor_args Problems Detected Clear uniforms before first program use on all platforms: 124764, 349137 Applied Workarounds: clear_uniforms_before_first_program_use Mesa drivers in Linux handle varyings without static use incorrectly: 333885 Applied Workarounds: count_all_in_varyings_packing Disable partial swaps on Mesa drivers (detected with GL_RENDERER): 339493 Applied Workarounds: disable_post_sub_buffers_for_onscreen_surfaces Always rewrite vec/mat constructors to be consistent: 398694 Applied Workarounds: scalarize_vec_and_mat_constructor_args On Intel GPUs MSAA performance is not acceptable for GPU rasterization: 527565 Applied Workarounds: msaa_is_slow Timer queries crash on Intel GPUs on Linux: 540543, 576991 Applied Workarounds: disable(GL_ARB_timer_query), disable(GL_EXT_timer_query) Use GL_INTEL_framebuffer_CMAA on ChromeOS: 535198 Applied Workarounds: disable_framebuffer_cmaa Disable partial swaps on Mesa drivers (detected with GL_VERSION): 339493 Applied Workarounds: disable_post_sub_buffers_for_onscreen_surfaces Decode and encode before generateMipmap for srgb format textures on os except macosx: 634519 Applied Workarounds: decode_encode_srgb_for_generatemipmap adjust src/dst region if blitting pixels outside read framebuffer on Linux Intel: 664740 Applied Workarounds: adjust_src_dst_region_for_blitframebuffer Disable KHR_blend_equation_advanced until cc shaders are updated: 661715 Applied Workarounds: disable(GL_KHR_blend_equation_advanced), disable(GL_KHR_blend_equation_advanced_coherent) Don't expose disjoint_timer_query extensions to WebGL: 808744 Native GpuMemoryBuffers have been disabled, either via about:flags or command line. Disabled Features: native_gpu_memory_buffers Viz service display compositor is not enabled by default. Disabled Features: viz_display_compositor Checker-imaging has been disabled via finch trial or the command line. Disabled Features: checker_imaging Version Information Data exported 2018-07-06T13:05:15.022Z Chrome version Chrome/67.0.3396.79 Operating system Linux 4.17.3-200.fc28.x86_64 Software rendering list URL https://chromium.googlesource.com/chromium/src/+/161bdad7314804dc8c72f850396fcd696e8863e8/gpu/config/software_rendering_list.json Driver bug list URL https://chromium.googlesource.com/chromium/src/+/161bdad7314804dc8c72f850396fcd696e8863e8/gpu/config/gpu_driver_bug_list.json ANGLE commit id unknown hash 2D graphics backend Skia/67 78b60f4ff13b83da98ae2bca85aaef0a98b61098- Command Line /usr/bin/chromium-browser --enable-plugins --enable-extensions --enable-user-scripts --enable-printing --enable-sync --auto-ssl-client-auth --flag-switches-begin --disable-device-discovery-notifications --disable-cast-streaming-hw-encoding --no-pings --enable-gpu-rasterization --disable-push-api-background-mode --enable-webrtc-srtp-aes-gcm --enable-webrtc-srtp-encrypted-headers --enable-zero-copy --ignore-gpu-blacklist --disable-features=GenericSensor,SafeSearchUrlReporting --flag-switches-end Driver Information Initialization time 42 In-process GPU false Passthrough Command Decoder false Direct Composition false Supports overlays false Sandboxed true GPU0 VENDOR = 0x8086, DEVICE= 0x0a16 *ACTIVE* Optimus false AMD switchable false Driver vendor Mesa Driver version 18.0.5 Driver date Pixel shader version 1.30 Vertex shader version 1.30 Max. MSAA samples 8 Machine model name Machine model version GL_VENDOR Intel Open Source Technology Center GL_RENDERER Mesa DRI Intel(R) Haswell Mobile GL_VERSION 3.0 Mesa 18.0.5 GL_EXTENSIONS GL_3DFX_texture_compression_FXT1 GL_AMD_conservative_depth GL_AMD_draw_buffers_blend GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_trinary_minmax GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_APPLE_object_purgeable GL_APPLE_packed_pixels GL_ARB_ES2_compatibility GL_ARB_ES3_compatibility GL_ARB_arrays_of_arrays GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_clip_control GL_ARB_color_buffer_float GL_ARB_compressed_texture_pixel_storage GL_ARB_compute_shader GL_ARB_conditional_render_inverted GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_copy_image GL_ARB_cull_distance GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_derivative_control GL_ARB_draw_buffers 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GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_seamless_cubemap_per_texture GL_ARB_separate_shader_objects GL_ARB_shader_atomic_counter_ops GL_ARB_shader_atomic_counters GL_ARB_shader_bit_encoding GL_ARB_shader_clock GL_ARB_shader_draw_parameters GL_ARB_shader_group_vote GL_ARB_shader_image_load_store GL_ARB_shader_image_size GL_ARB_shader_objects GL_ARB_shader_precision GL_ARB_shader_storage_buffer_object GL_ARB_shader_texture_image_samples GL_ARB_shader_texture_lod GL_ARB_shading_language_100 GL_ARB_shading_language_420pack GL_ARB_shading_language_packing GL_ARB_shadow GL_ARB_stencil_texturing GL_ARB_sync GL_ARB_texture_barrier GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_ARB_texture_compression_bptc GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map GL_ARB_texture_cube_map_array GL_ARB_texture_env_add GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_filter_anisotropic GL_ARB_texture_float GL_ARB_texture_gather 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GL_EXT_texture_cube_map GL_EXT_texture_edge_clamp GL_EXT_texture_env_add GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer GL_EXT_texture_lod_bias GL_EXT_texture_object GL_EXT_texture_rectangle GL_EXT_texture_sRGB GL_EXT_texture_sRGB_decode GL_EXT_texture_shared_exponent GL_EXT_texture_snorm GL_EXT_texture_swizzle GL_EXT_timer_query GL_EXT_transform_feedback GL_EXT_vertex_array GL_EXT_vertex_array_bgra GL_IBM_multimode_draw_arrays GL_IBM_rasterpos_clip GL_IBM_texture_mirrored_repeat GL_INGR_blend_func_separate GL_INTEL_performance_query GL_KHR_blend_equation_advanced GL_KHR_context_flush_control GL_KHR_debug GL_KHR_no_error GL_KHR_robust_buffer_access_behavior GL_KHR_robustness GL_MESA_pack_invert GL_MESA_shader_integer_functions GL_MESA_texture_signed_rgba GL_MESA_window_pos GL_NV_blend_square GL_NV_conditional_render GL_NV_depth_clamp GL_NV_light_max_exponent GL_NV_packed_depth_stencil GL_NV_primitive_restart GL_NV_texgen_reflection GL_NV_texture_barrier GL_NV_texture_env_combine4 GL_NV_texture_rectangle GL_OES_EGL_image GL_OES_read_format GL_S3_s3tc GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_SUN_multi_draw_arrays Disabled Extensions GL_ARB_timer_query GL_EXT_timer_query GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent Disabled WebGL Extensions EXT_disjoint_timer_query EXT_disjoint_timer_query_webgl2 Window system binding vendor SGI Window system binding version 1.4 Window system binding extensions GLX_ARB_create_context GLX_ARB_create_context_profile GLX_ARB_create_context_robustness GLX_ARB_fbconfig_float GLX_ARB_framebuffer_sRGB GLX_ARB_multisample GLX_EXT_create_context_es_profile GLX_EXT_create_context_es2_profile GLX_EXT_fbconfig_packed_float GLX_EXT_framebuffer_sRGB GLX_EXT_import_context GLX_EXT_libglvnd GLX_EXT_texture_from_pixmap GLX_EXT_visual_info GLX_EXT_visual_rating GLX_MESA_copy_sub_buffer GLX_OML_swap_method GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGIS_multisample GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_SGIX_visual_select_group GLX_INTEL_swap_event Window manager Metacity (Marco) XDG_CURRENT_DESKTOP MATE GDMSESSION mate Compositing manager Yes Direct rendering Yes Reset notification strategy 0x8261 GPU process crash count 0 System visual ID 33 RGBA visual ID 322 Compositor Information Tile Update Mode Zero-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 R_16 Software only RG_88 Software only BGR_565 Software only RGBA_4444 Software only RGBX_8888 Software only RGBA_8888 Software only BGRX_8888 Software only BGRX_1010102 Software only RGBX_1010102 Software only BGRA_8888 Software only RGBA_F16 Software only YVU_420 Software only YUV_420_BIPLANAR Software only UYVY_422 Software only Display(s) Information Info Display[4693809618230595] bounds=[0,0 1920x1200], workarea=[0,24 1920x1176], scale=1, external. Color space information {primaries:INVALID, transfer:INVALID, matrix:INVALID, range:INVALID} Bits per color component 8 Bits per pixel 24 Video Acceleration Information Resetting Chromium settings seems to resolve this for a while, but it comes back after a while. I guess this is because I connect/disconnect the external webcam from my laptop when taking it to the office and back home.
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Jul 10
Thanks for filing the issue! Tried checking the issue on reported chrome version 67.0.3396.79 using Ubuntu 17.10 with the below mentioned steps. 1. Launched chrome 2. Navigated to https://vmr.citi.com/webapp/ -> clicked settings 3. Under Camera drop down tried selecting HP HD camera and HP IR camera As we do not have externally connected web cam to proceed from point 2 in C#0. @Reporter: Could you please let us know if we need to have an external webcam in order to repro this and please provide any sample test meeting address to check and confirm the issue from our end.
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Jul 10
I don't know if an external webcam is required. I have access to laptops with single internal camera and the issue is reproducible with an external USB webcam. I'll send you my meeting address via e-mail.
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Jul 10
Thank you for providing more feedback. Adding the requester to the cc list. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jul 12
As per comment #3, an external webcam is required to triage this issue. Hence, adding label TE-NeedsTriageFromHYD for further triaging from TE-end. Thanks...!!
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Jul 13
Just to update, Mailed to rathann@gmail.com requesting meeting address which helps in further triaging of the issue. Adding Needs-Feedback label till we hear from reporter. Thanks!
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Jul 17
Thanks for providing meeting address to test this issue from TE end!.. Unable to reproduce this issue on reported version 67.0.3396.79 and latest stable 67.0.3396.99 using debian with steps mentioned below. 1. Navigated to https://vmr.citi.com/webapp/ , selected external webcam Logitech HD 1080p. 2. Entered meeting address and joined as Guest. Observations: 1. Observing video from webcam when we select external webcam. 2. Observed video from internal webcam when we select Internal option. Attaching screeshot for reference. @Reporter: Please check the issue on fresh profile which do not have any apps/extensions. Also please check the issue on latest stable 67.0.3396.99 and report us back the behavior. Thanks!
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Jul 18
@sindhu.chelamcherla@chromium.org I tried with another (office) webcam, also made by Logitech and indeed I cannot reproduce the issue with that one. However, it's 100% reproducible, even on a fresh profile with my home webcam. This one is a Sony Playstation Eye driven by gspca_ov534 kernel module. If I unload the uvcvideo module and the external webcam is the only one, then there is no issue. So it looks there's something specific about my webcam that confuses Chromium. I'm attaching a screencast to show the issue.
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Jul 18
Thank you for providing more feedback. Adding the requester to the cc list. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jul 23
Adding "TE-Hardware-Dependency" as we don't have the mentioned Sony Playstation Eye driven by gspca_ov534 kernel module in order to test and confirm the issue. Hence requesting some one from respective team to have a look into this and help in further triaging it. Thanks!
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Jul 23
@jbanavatu@chromium.org I suspect it may be enough to have an external USB webcam driven by another driver, i.e. anything not driven by uvcvideo, but I don't have yet another device to test this theory.
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Sep 7
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Sep 21
rathann@: Could you please provide the following from your machine when both cameras are present: 1. The output of the video tab from chrome://media-internals (note, this only populates after Chrome has at least once attempted to enumerate video capture devices). This should be a list of the available cameras and the formats they report as supported. 2. From chrome://webrtc-internals/ the output corresponding to the getUserMedia request made by your web app. In particular, I am interested in the constraints it requests.
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Sep 24
@chfremer@chromium.org thanks for your interest. Here are the requested outputs: chrome://media-internals Video Capture tab (/dev/video0 is the integrated camera, /dev/video2 is the external one): [ { "captureApi": "V4L2 SPLANE", "formats": [ { "resolution": "320x240", "fps": "30.00" }, { "resolution": "320x240", "fps": "15.00" }, { "resolution": "424x240", "fps": "30.00" }, { "resolution": "424x240", "fps": "15.00" }, { "resolution": "640x360", "fps": "30.00" }, { "resolution": "640x360", "fps": "15.00" }, { "resolution": "640x480", "fps": "30.00" }, { "resolution": "640x480", "fps": "15.00" }, { "resolution": "848x480", "fps": "30.00" }, { "resolution": "848x480", "fps": "15.00" }, { "resolution": "848x480", "fps": "10.00" }, { "resolution": "960x540", "fps": "30.00" }, { "resolution": "960x540", "fps": "15.00" }, { "resolution": "960x540", "fps": "10.00" }, { "resolution": "1280x720", "fps": "30.00" }, { "resolution": "1280x720", "fps": "15.00" }, { "resolution": "1280x720", "fps": "10.00" } ], "id": "/dev/video0", "name": "Front Camera (04f2:b42a)" }, { "captureApi": "V4L2 SPLANE", "formats": [ { "resolution": "320x240", "fps": "187.00" }, { "resolution": "320x240", "fps": "150.00" }, { "resolution": "320x240", "fps": "137.00" }, { "resolution": "320x240", "fps": "125.00" }, { "resolution": "320x240", "fps": "100.00" }, { "resolution": "320x240", "fps": "75.00" }, { "resolution": "320x240", "fps": "60.00" }, { "resolution": "320x240", "fps": "50.00" }, { "resolution": "320x240", "fps": "37.00" }, { "resolution": "320x240", "fps": "30.00" }, { "resolution": "640x480", "fps": "60.00" }, { "resolution": "640x480", "fps": "50.00" }, { "resolution": "640x480", "fps": "40.00" }, { "resolution": "640x480", "fps": "30.00" }, { "resolution": "640x480", "fps": "15.00" } ], "id": "/dev/video2", "name": "USB Camera-B4.04.27.1 (1415:2000)" } ] And chrome://webrtc-internals/ : Caller origin: https://vmr.citi.com Caller process id: 4131 Audio Constraints Video Constraints {width: {min: 320, max: 1280, ideal: 1024}, deviceId: {ideal: ["2feab7738a339e2a8629d97cfbf2acc637e151a14bac980c787982e5acf6b52d"]}} Caller origin: https://vmr.citi.com Caller process id: 4131 Audio Constraints Video Constraints {width: {min: 320, max: 1280, ideal: 1024}, deviceId: {ideal: ["2feab7738a339e2a8629d97cfbf2acc637e151a14bac980c787982e5acf6b52d"]}} Caller origin: https://vmr.citi.com Caller process id: 4131 Audio Constraints Video Constraints {width: {min: 1280}, height: {min: 720}, frameRate: {max: 30, ideal: 30}, deviceId: {ideal: ["2feab7738a339e2a8629d97cfbf2acc637e151a14bac980c787982e5acf6b52d"]}} Caller origin: https://vmr.citi.com Caller process id: 4131 Audio Constraints Video Constraints {width: {min: 320, max: 1280, ideal: 1024}, deviceId: {ideal: ["2feab7738a339e2a8629d97cfbf2acc637e151a14bac980c787982e5acf6b52d"]}} Caller origin: https://vmr.citi.com Caller process id: 4131 Audio Constraints Video Constraints {width: {min: 1280}, height: {min: 720}, frameRate: {max: 30, ideal: 30}, deviceId: {ideal: ["2feab7738a339e2a8629d97cfbf2acc637e151a14bac980c787982e5acf6b52d"]}}
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Sep 24
I also tried running modprobe -r uvcvideo before starting Chromium and obviously it starts working as expected if the external camera is the only one visible to the OS. By the way, I'm running Chromium 69.0.3497.92 now.
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Sep 24
Thanks for the infos, that is very helpful. I assume the getUserMedia requests shown from webrtc-internals correspond to requests where you had selected the /dev/video2 camera but it does not end up getting selected. Potentially, the reason for that could be that in the constraints, the "ideal" for device id has lower precedence than the ideal resolution. Since the /dev/video2 camera only goes up to 640x480 the constraints processing in Chromium may end up favoring the other camera. Have you tried using "exact" instead of "ideal" for the device id in the constraints?
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Sep 24
You have width: {min: 1280} height: {min: 720} and deviceId: {ideal: ["2feab7738a339e2a8629d97cfbf2acc637e151a14bac980c787982e5acf6b52d"]}
If "2feab7738a339e2a8629d97cfbf2acc637e151a14bac980c787982e5acf6b52d" is the camera that only supports up to 640x480, then the ideal deviceId will be ignored because it cannot satisfy the minimum resolution of 720x1280. If you use exact to actually force that device, then you'll get OverconstrainedError because you cannot satisfy the minimum requested resolution.
It looks like this is working as intended. You just have to update your constraints.
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Sep 25
@guidou@chromium.org @chfremer@chromium.org Sorry, but I have no idea how to change constraints here. Could you point me in the right direction? Is there a Chromium setting to change? I didn't find anything in chrome://flags. Also, can you explain why it works without any issues if the external camera is the only one visible to the OS?
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Sep 25
re #18: In order to access the camera, some JavaScript code from https://vmr.citi.com has to call an API called getUserMedia, which takes the constraints as an argument, see e.g. [1] for an introduction. The developers of that JavaScript code would need to update their code to change from setting the constraint for device id to "ideal" to "exact". The reason it works with just one camera connected is that there is no longer a "better" camera available, so Chrome has no other option to choose from. "Better" here means, that the other camera can better satisfy the given constraints. [1] https://www.html5rocks.com/en/tutorials/getusermedia/intro/
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Oct 12
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Comment 1 by susan.boorgula@chromium.org
, Jul 9