Windows build fails with gstreamer DLL not found error

[saschanaz]

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** Visual Studio 2019 Developer Command Prompt v16.0
** Copyright (c) 2019 Microsoft Corporation
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[vcvarsall.bat] Environment initialized for: 'x64'
    Updating crates.io index
  Downloaded weedle v0.10.0
   Compiling weedle v0.10.0
   Compiling servo_arc v0.1.1 (C:\Users\sasch\Documents\GitHub\servo\components\servo_arc)
   Compiling style v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\style)
   Compiling webxr-api v0.0.1 (https://github.com/servo/webxr#39600af8)
   Compiling servo v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\ports\glutin)
   Compiling to_shmem v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\to_shmem)
   Compiling webxr v0.0.1 (https://github.com/servo/webxr#39600af8)
   Compiling selectors v0.21.0 (C:\Users\sasch\Documents\GitHub\servo\components\selectors)
   Compiling script v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\script)
   Compiling libservo v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\servo)
   Compiling script_plugins v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\script_plugins)
   Compiling malloc_size_of v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\malloc_size_of)
   Compiling servo_url v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\url)
   Compiling msg v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\msg)
   Compiling range v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\range)
   Compiling pixels v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\pixels)
   Compiling gfx_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\gfx_traits)
   Compiling webvr_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\webvr_traits)
   Compiling background_hang_monitor v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\background_hang_monitor)
   Compiling style_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\style_traits)
   Compiling devtools_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\devtools_traits)
   Compiling devtools v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\devtools)
   Compiling embedder_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\embedder_traits)
   Compiling servo_geometry v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\geometry)
   Compiling servo_config v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\config)
   Compiling bluetooth_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\bluetooth_traits)
   Compiling media v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\media)
   Compiling profile_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\profile_traits)
   Compiling net_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\net_traits)
   Compiling canvas_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\canvas_traits)
   Compiling bluetooth v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\bluetooth)
   Compiling profile v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\profile)
   Compiling net v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\net)
   Compiling script_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\script_traits)
   Compiling metrics v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\metrics)
   Compiling webvr v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\webvr)
   Compiling webdriver_server v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\webdriver_server)
   Compiling compositing v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\compositing)
   Compiling canvas v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\canvas)
   Compiling script_layout_interface v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\script_layout_interface)
   Compiling gfx v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\gfx)
   Compiling layout_2013 v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\layout)
   Compiling layout_traits v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\layout_traits)
   Compiling constellation v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\constellation)
   Compiling layout_thread_2013 v0.0.1 (C:\Users\sasch\Documents\GitHub\servo\components\layout_thread)
    Finished dev [unoptimized + debuginfo] target(s) in 24m 00s
Packaging gstreamer DLLs
ERROR: could not find required GStreamer DLL: avfilter-7.dll
ERROR: could not find required GStreamer DLL: avformat-58.dll
ERROR: could not find required GStreamer DLL: avcodec-58.dll
ERROR: could not find required GStreamer DLL: avutil-56.dll
ERROR: could not find required GStreamer DLL: swresample-3.dll
Packaging MSVC DLLs
Build FAILED in 0:24:03

I have installed the latest gstreamer 1.16.0 and build has been successful, why does this suddenly happen?

[CYBAI]

They are updated in #23712 as required packages for media support.

I don't have a windows machine but after reading #23712 and #23631 (comment), could you check your libs folder setting or something related? 🤔

cc @ferjm

[saschanaz]

My gstreamer lib folder does not have those five dll files whereas it has all of files mentioned in #23712 (comment).

[jdm]

@saschanaz Did you install gstreamer-1.0-devel-msvc-x86_64-1.16.0.msi along with gstreamer-1.0-msvc-x86_64-1.16.0.msi?

[saschanaz]

@jdm Yes:

[jdm]

Given that we can reproduce on appveyor in #23749, I'll try and sort out the problem there.

[ferjm]

#23749 is done, so I am closing this one. Please, reopen if you still encounter this issue.

[ferjm]

@jdm Yes:

Make sure that you are installing the MSVC binaries. The MinGW ones won't work due to different dll naming.