Steps to reproduce: - Ensure media.hardware-video-decoding.enabled is true - Open https://www.youtube.com/watch?v=q6EoRBvdVPQ - Frequently, the first ~4 seconds of video will appear black and distorted - After the initial distortion, playing and seeking within the video is fine about:support info: Application Basics ------------------ Name: Firefox Version: 42.0a1 Build ID: 20150706030206 Update Channel: nightly User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 Multiprocess Windows: 1/1 (default: true) Safe Mode: false Crash Reports for the Last 3 Days --------------------------------- All Crash Reports Extensions ---------- Name: Symantec VIP Access Add-On Version: 2.0.5.0 Enabled: false ID: VIP3X@verisign.com Graphics -------- Adapter Description: ATI Mobility Radeon HD 3650 Adapter Drivers: aticfx64 aticfx64 aticfx32 aticfx32 atiumd64 atidxx64 atiumdag atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 256 Asynchronous Pan/Zoom: none Device ID: 0x9591 Direct2D Enabled: true DirectWrite Enabled: true (6.2.9200.17292) Driver Date: 4-29-2013 Driver Version: 8.970.100.1100 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC) Subsys ID: 211717aa Supports Hardware H264 Decoding: true Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (ATI Mobility Radeon HD 3650 Direct3D11 vs_4_1 ps_4_1) windowLayerManagerRemote: true AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0 Important Modified Preferences ------------------------------ browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.smart_size.first_run: false browser.cache.frecency_experiment: 2 browser.download.importedFromSqlite: true browser.places.smartBookmarksVersion: 7 browser.sessionstore.upgradeBackup.latestBuildID: 20150706030206 browser.startup.homepage_override.buildID: 20150706030206 browser.startup.homepage_override.mstone: 42.0a1 dom.apps.reset-permissions: true dom.mozApps.used: true extensions.lastAppVersion: 42.0a1 gfx.direct3d.last_used_feature_level_idx: 0 gfx.driver-init.appVersion: 42.0a1 gfx.driver-init.deviceID: 0x9591 gfx.driver-init.driverVersion: 8.970.100.1100 gfx.driver-init.feature-d2d: true gfx.driver-init.feature-d3d11: true gfx.driver-init.status: 2 media.gmp-eme-adobe.lastUpdate: 1436219788 media.gmp-eme-adobe.version: 11 media.gmp-gmpopenh264.lastUpdate: 1436219788 media.gmp-gmpopenh264.version: 1.4 media.gmp-manager.buildID: 20150706030206 media.gmp-manager.lastCheck: 1436219783 media.hardware-video-decoding.failed: false network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true privacy.sanitize.migrateFx3Prefs: true security.sandbox.content.tempDirSuffix: {d4fab9e4-8724-4171-96f4-aec0f81d2fa6} Important Locked Preferences ---------------------------- JavaScript ---------- Incremental GC: true Accessibility ------------- Activated: false Prevent Accessibility: 0 Library Versions ---------------- NSPR Expected minimum version: 4.10.8 Version in use: 4.10.8 NSS Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC NSSSMIME Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC NSSSSL Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC NSSUTIL Expected minimum version: 3.19.2 Version in use: 3.19.2 Experimental Features ---------------------

A few questions: 1) Was it happening on earlier Nightly builds or did it just start recently? 2) Can you please make sure you're using the latest graphics driver? 3) Can you please check to see if it reproduces on a new Firefox profile?

(In reply to Anthony Hughes, QA Mentor (:ashughes) [Away until July 20] from comment #1) > A few questions: > 1) Was it happening on earlier Nightly builds or did it just start recently? > 2) Can you please make sure you're using the latest graphics driver? > 3) Can you please check to see if it reproduces on a new Firefox profile? 1) It just started recently IIRC. 2) Yes, this is with the most recent drivers provided by Lenovo. 3) Yes, it reproduces on a new profile.

(In reply to Andrew Comminos [:acomminos] from comment #2) > 1) It just started recently IIRC. Can you check which Nightly this bug starts in? > 2) Yes, this is with the most recent drivers provided by Lenovo. Is it the latest drivers provided by Windows Update or AMD? > 3) Yes, it reproduces on a new profile. Thanks, this at least rules out that as an issue.

I am not able to reproduce the issue with the OP video, but I can reproduce it with the following one consistently: https://www.youtube.com/watch?v=8uaoBTBofto On the 0:01 till 0:05 seconds, the video is freezed

(In reply to Mikel from comment #4) > I am not able to reproduce the issue with the OP video, but I can reproduce > it with the following one consistently: > https://www.youtube.com/watch?v=8uaoBTBofto > > On the 0:01 till 0:05 seconds, the video is freezed Can you please check the latest Nightly and verify you're using the latest drivers? If this still reproduces please provide a copy of about:support.

(In reply to Anthony Hughes, QA Mentor (:ashughes) from comment #5) > (In reply to Mikel from comment #4) > > I am not able to reproduce the issue with the OP video, but I can reproduce > > it with the following one consistently: > > https://www.youtube.com/watch?v=8uaoBTBofto > > > > On the 0:01 till 0:05 seconds, the video is freezed > > Can you please check the latest Nightly and verify you're using the latest > drivers? If this still reproduces please provide a copy of about:support. Yes, I am on the latest Nightly and on latest drivers. Please see the bug I have just opened: https://bugzilla.mozilla.org/show_bug.cgi?id=1188651 Seems like that media.mediasource.enabled setting is the name of the game for it.

(In reply to Mikel from comment #6) > Yes, I am on the latest Nightly and on latest drivers. > Please see the bug I have just opened: > https://bugzilla.mozilla.org/show_bug.cgi?id=1188651 > > Seems like that media.mediasource.enabled setting is the name of the game > for it. I'm going to go ahead and dupe your other report as it's easier to track investigation in a single report. If that issue turns out to be different then we can always reopen it later. For now, please provide a copy of your about:support page as requested earlier.

Andrew can you please confirm that flipping media.mediasource.enabled changes the behaviour of this bug? If so maybe this is an issue with MSE and not Graphics (or maybe both?).

(In reply to Anthony Hughes, QA Mentor (:ashughes) from comment #8) > Andrew can you please confirm that flipping media.mediasource.enabled > changes the behaviour of this bug? If so maybe this is an issue with MSE and > not Graphics (or maybe both?). 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I wonder if this is what causes bug 1188131. If we notice corrupted frames, it may disable HW acceleration as we assume it's the HW that is faulty. However, if you set media.hardware-video-decoding.enabled=false do you have any corruptions issue ? Alice0775, can you reproduce the issue yourself? what machine do you have?

(In reply to Jean-Yves Avenard [:jya] from comment #15) > if you set media.hardware-video-decoding.enabled=false > > do you have any corruptions issue ? It helps. > Alice0775, can you reproduce the issue yourself? Yes, Of course. > what machine do you have? Build Identifier: https://hg.mozilla.org/mozilla-central/rev/33dc8a83cfc0 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 ID:20150728030209 Graphics -------- Adapter Description: AMD Radeon HD 6450 Adapter Drivers: aticfx64 aticfx64 aticfx64 aticfx32 aticfx32 aticfx32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 1024 Asynchronous Pan/Zoom: wheel input enabled ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 300 Device ID: 0x6779 Direct2D Enabled: true DirectWrite Enabled: true (6.2.9200.17292) Driver Date: 6-22-2015 Driver Version: 15.200.1046.0 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC) Subsys ID: 23111787 Supports Hardware H264 Decoding: true Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 6450 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote: true AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

by "it helps" you mean the issue is entirely gone ? or it's just better (and there's still corrupted frames)

Can you reproduce it when restarting the video once ended? Can you reproduce it if you manually set a resolution? Is one particular resolution showing the problem? What kind of distortion are you exactly talking about? blocks, greens etc? could you make a capture? If you right click and select stats for nerd. what does it show? Thanks

I can confirm I am seeing the same behavior as Alice.

(In reply to Alice0775 White from comment #21) > Please backed out the offending bug. > Because, there is a possibility that this bug hides the other new regression. I don't see why. This bug will be fixed, and we're working on it. It's Nightly there will always be some road bumps.

(In reply to Alice0775 White from comment #22) > (In reply to Jean-Yves Avenard [:jya] from comment #20) > > Can you reproduce it when restarting the video once ended? > > Yes, I can. > 1. Open video and wait to end > 2. Close the tab > 3. Clear cache > 4. Re-Open the video > by restarting, I mean playing play again once video reach the end. If you don't clear the cache you can't reproduce it? > > Can you reproduce it if you manually set a resolution? > > I cannot set new resolution by manually without video play with default > resolution. > So I cannot test. > > > Is one particular resolution showing the problem? > > It is default resolution > > > > > What kind of distortion are you exactly talking about? blocks, greens etc? > > could you make a capture? > > > > Stop video for a while > Turn black whole video and reverse color > Sips then playbark > > attached bug-screencapture > > > > If you right click and select stats for nerd. what does it show? > > > > attached bug-video-stats > > > Thanks oh, you're using e10s that's something I didn't turn on. thank you for your feedback and help.

Can you reproduce it with e10s turned off?

Ok. I managed to reproduce it consistently as follow. 1. Open https://www.youtube.com/watch?v=8uaoBTBofto 2. Let it play to the end. 3. In the settings, set quality to 360p 4. Press the replay icon. 5. If playback doesn't restart, then press play again after the image has settled. Video playback will appear frozen, and suddenly restart with corruption. Probably seeking that is wrong

I'm not sure this is the same issue originally reported as it mentions hardware acceleration ; however Alice's issue can be reproduced even with HW decoding turned off. Andrew, if you set media.hardware-video-decoding.enabled=false can you reproduce the problem?

I'm not at the office right now, but IIRC I could not reproduce with hardware video decoding disabled. I can verify tomorrow.

Ah so that may be another problem then. In the mean time will create another bug.

Tracking in 42 because regression, affects YouTube.

Thanks :jya, the steps in comment 29 reproduce this bug for me as well.

Can you still reproduce the issue with the latest Nightly ?

:jya, not for me. Still reproduceable with steps in #c29

Which version of Nightly are you using? steps 29 were fixed in bug 1189138. Version 20150802030218 includes those changes

Yes, I am on Version 20150802030218 and it's still reproduceable reliably.

Back Bug 1171379 out, please

It will not be backed out.

(In reply to Jean-Yves Avenard [:jya] from comment #29) > Ok. I managed to reproduce it consistently as follow. > 1. Open https://www.youtube.com/watch?v=8uaoBTBofto > 2. Let it play to the end. > 3. In the settings, set quality to 360p > 4. Press the replay icon. > 5. If playback doesn't restart, then press play again after the image has > settled. WMF in nightly on Windows.

(In reply to Jean-Yves Avenard [:jya] from comment #40) > It will not be backed out. OK, then please fix it before marge this to aurora42. Otherwise, this should be backed out!

it should already be fixed ; and if not it will be fixed. We can't back that changeset.

Alice, can you reproduce using the steps described in comment 29 using the latest Nightly?

(In reply to Jean-Yves Avenard [:jya] from comment #44) > Alice, can you reproduce using the steps described in comment 29 using the > latest Nightly? No. I am using simple STR of comment#13, and reproducible on latest Nightly42.0a1. https://hg.mozilla.org/mozilla-central/rev/32712cd01159 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 ID:20150802030218

(In reply to Jean-Yves Avenard [:jya] from comment #43) > it should already be fixed ; and if not it will be fixed. Not fixed, you should try STR of comment #13. it reproduced. > > We can't back that changeset. I do not understand why can not.

Because there are hundreds of bugs fixed by that change that would now regress ; and would seriously disrupt our plans to enable MSE on all web sites (it's currently limited to YouTube). In any case ; can you reproduce the problem with the latest nightly using STR in c29? I'm still unsure if they are one and the same bug ; if you can't reproduce using STR in comment 29; then at least we know that problem is fixed and this particular problem is another.

(In reply to Jean-Yves Avenard [:jya] from comment #47) > Because there are hundreds of bugs fixed by that change that would now > regress ; and would seriously disrupt our plans to enable MSE on all web > sites (it's currently limited to YouTube). > > In any case ; can you reproduce the problem with the latest nightly using > STR in c29? > > I'm still unsure if they are one and the same bug ; if you can't reproduce > using STR in comment 29; then at least we know that problem is fixed and > this particular problem is another. Reopen original Bug 1188651 , it should not duplicate this one

got myself setup on a Dell desktop. Can reproduce this bug \o/

(In reply to Jean-Yves Avenard [:jya] from comment #49) > got myself setup on a Dell desktop. Can reproduce this bug \o/ It's not funny. You also broke DXVA2, D3D11 decoding, as bad as it was already implemented.

Don't drain decoder when encountering WAIT_FOR_DATA. If the next frame following upon resume isn't a keyframe, it will not be decodable.

Update MSE mochitests. The various waiting events won't be fired at the same time

(In reply to ... from comment #51) > (In reply to Jean-Yves Avenard [:jya] from comment #49) > > got myself setup on a Dell desktop. Can reproduce this bug \o/ > > It's not funny. You also broke DXVA2, D3D11 decoding, as bad as it was > already implemented. uh what?

We made the design decision that it was preferable to decode as much of what we had, even if that meant we couldn't decode some frames upon resume. This can cause significant apparent stalls with some YouTube videos where keyframes are up to 4.2s appart (128 frames).

In test_HaveMetadataUnbufferedSeek_mp4, do endOfStream after appending 2nd buffer in case decoder doesn't output enough frames to seek to the target point.

Going to commit part 4 as it prevents another intermittent

The try machines do not have Service Pack 1 installed, the WMF decoder doesn't output frames until a full second of data has been added. Rendering those tests invalid.

The try machines do not have Service Pack 1 installed, the WMF decoder doesn't output frames until a full second of data has been added. Rendering those tests invalid.

The test loads 10 frames of video data and expect the loadeddata event to be fired. Windows 7 without SP1 installed (like our try machines) may not output any frames until at least 25s have been input.

(In reply to Jean-Yves Avenard [:jya] from comment #64) > Created attachment 8646114 [details] [diff] [review] > [MSE] P6. Disable some tests on windows 7. > > The test loads 10 frames of video data and expect the loadeddata event to be > fired. Windows 7 without SP1 installed (like our try machines) may not > output any frames until at least 25s have been input. Are the WMF decoders intermittent in their behaviour? Why did this not mean that the test needed to be disabled before bug 1171379 landed? https://hg.mozilla.org/integration/mozilla-inbound/rev/c100ddbbaf68#l5.1

It is intermittent in behaviour yes. I've seen them outputting frames very quickly. This is why the test_eme_*_blocked_* where intermittently failing. We didn't need it before because once we entered a discontinuity or a gap in the data we used to drain the decoder. But draining the decoder renders all future frames unplayable until a new key frame is added and which is what this bug is about. When starting (and seeking) YouTube now adds a partial media segment, with 1s worth of data. And then goes on to load the rest of the media segment. This is a new behaviour from them, it didn't occur a few weeks ago. What would happen is that playback would start, and decode 1s of video before the remaining segment had to time to be downloaded. We would drain the decoder upon reaching 1s. The next keyframe is found at 4ish s. So we ended with video from 1s to 4s being unplable hence the apparent freeze. This is what's this bug is correcting, don't drain the decoder and instead wait. The old MSE used to drain the decoder, but upon resuming with new data would then seek back, so it obfuscated the WMF decoder issue. It was decided that those tests test the wrong behaviour ; there's nothing that states that if a stream is open ended we should output all pending frames.

Comment on attachment 8646114 [details] [diff] [review] [MSE] P6. Disable some tests on windows 7. Thanks. That explanation is very helpful.

https://hg.mozilla.org/integration/mozilla-inbound/rev/5bd90b517450 https://hg.mozilla.org/integration/mozilla-inbound/rev/f462e2965b45 https://hg.mozilla.org/integration/mozilla-inbound/rev/b6b214879515 https://hg.mozilla.org/integration/mozilla-inbound/rev/2b9006c1e8e0 https://hg.mozilla.org/integration/mozilla-inbound/rev/2c3c8a927e3f

https://hg.mozilla.org/mozilla-central/rev/5bd90b517450 https://hg.mozilla.org/mozilla-central/rev/f462e2965b45 https://hg.mozilla.org/mozilla-central/rev/b6b214879515 https://hg.mozilla.org/mozilla-central/rev/2b9006c1e8e0 https://hg.mozilla.org/mozilla-central/rev/2c3c8a927e3f

Looks like this should be set to (fixed and target milestone) 43. jya, do you want to request uplift? I know you mentioned you had some other approvals coming. Just making sure this is still on your radar.

https://hg.mozilla.org/releases/mozilla-aurora/rev/45f3c6119bca https://hg.mozilla.org/releases/mozilla-aurora/rev/6613d06f28bc https://hg.mozilla.org/releases/mozilla-aurora/rev/e9142a9acf59 https://hg.mozilla.org/releases/mozilla-aurora/rev/ff30230e2621 https://hg.mozilla.org/releases/mozilla-aurora/rev/2f76c5ebacaf

Backed out for a youtube playback regression. See Bug 1199573. https://hg.mozilla.org/releases/mozilla-aurora/rev/5bb661db5c6c

https://hg.mozilla.org/releases/mozilla-aurora/rev/58ec32431626 https://hg.mozilla.org/releases/mozilla-aurora/rev/581a13dc2ecd https://hg.mozilla.org/releases/mozilla-aurora/rev/3ad6b0893cd3 https://hg.mozilla.org/releases/mozilla-aurora/rev/2a6973379548 https://hg.mozilla.org/releases/mozilla-aurora/rev/c242886cad3c

Reproduced with Nightly from 2015-07-06 by using STR from comment 29, under Windows 7 x64. Verified fixed with 42.0b5 (Build ID: 20151008162217) and latest 43.0a2 (from 2015-10-11), under Windows 7 64-bit and Windows 10 32-bit.