Simple example pipeline using Opusenc fails from gst-launch?

[Steve Chapman]

I am planning to add Opus encoding and decoding to/from  Matroska container as a new fuction in an existing GStreamer based solution I have.

Before dealing updating my C++ solution I want to validate the new pipelines from the commandline with gst-launch.

Unfortunately when I use the example pipeline from the doc: 

https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-plugins/html/gst-plugins-base-plugins-opusenc.html 

i.e. gst-launch-1.0 -v audiotestsrc wave=sine num-buffers=100 ! audioconvert ! opusenc ! oggmux ! filesink location=sine.ogg

It fails with an exception:

Unhandled exception at 0x6252D01B (libopus-0.dll) in gst-launch-1.0.exe: 0xC0000005: Access violation reading location 0xFFFFFFFF

I am testing this on Windows10 with GStreamer 1.12.0.

I have also tried a variation on the pipeline that calls out most of the opusenc parameters but that also fails with the same exception, i.e.

gst-launch-1.0 audiotestsrc  num-buffers=100 ! "audio/x-raw,channels=1,rate=48000" ! opusenc audio-type=2048 bandwidth=1103 bitrate=20000 bitrate-type=1 inband-fec=FALSE packet-loss-percentage=0 dtx=FALSE ! fakesink

GST_DEBUG=4 log of console activity for both pipelines is attached along with a log of  "gst-inspect-1.0 opusenc" output.

Any insights would be appreciated, I'm not sure what I could be doing wrong since this seems pretty basic.

Thanks

Steve

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[Gst-Geek]

Hi Steve,

Below pipeline worked for me.
gst-launch-1.0 -v audiotestsrc wave=sine num-buffers=100 ! audioconvert !
opusenc ! oggmux ! filesink location=sine.ogg

From logs looks like binary or API mismatch. You may be using some other
version of opus dll. You Try with source code installation once.

~ Vinod




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[Steve Chapman]

Thanks Vinod.

Can you tell me what GStreamer version you are running?

I just tried updating to 1.12.3 but get the same result. Perhaps I'll need to back out to an earlier version. I have been using the Windows binary msi distribution rather than finding how to rebuild from source distribution.

Regards
Steve

On 4/10/2017 12:39 AM, "Vinod Kesti" <[hidden email]> wrote:

Hi Steve,

Below pipeline worked for me.
gst-launch-1.0 -v audiotestsrc wave=sine num-buffers=100 ! audioconvert !
opusenc ! oggmux ! filesink location=sine.ogg

From logs looks like binary or API mismatch. You may be using some other
version of opus dll. You Try with source code installation once.

~ Vinod




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[Gst-Geek]

I am using 1.12.1.

For me it looks like binary issue. Try source code installtion.



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[Steve Chapman]

Vinod,

I finally got the opusenc pipeline working after extracting an older libopus-0.dll from the 1.10.2 GStreamer MSI and putting it in place of the  installed 1.12.3 GStreamer version on my machine.

Since you can run the pipeline under 1.12.1 (I assume under window) the route cause may well be some local problem on my machine but I'm not sure how building the libopus-0.dll myself (if I could figure out how to do that) would help.

Regardless, I am now able to proceed and have raised a bug on this issue - https://bugzilla.gnome.org/show_bug.cgi?id=788537

Thanks for your feedback.

Steve

On 5 October 2017 at 22:25, Vinod Kesti <[hidden email]> wrote:

I am using 1.12.1.

For me it looks like binary issue. Try source code installtion.

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