Transcoding with h264 Video Codec Fails

Summary

Transcoding video from an input to a file using the h264 codec fails with these error messages.

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libVLC:[Error] avcodec:cannot find encoder H264 - MPEG-4 AVC (part 10)

*** Your Libav/FFmpeg installation is crippled. ***

*** Please check with your Libav/FFmpeg packager. ***

*** This is NOT a VLC media player issue. ***

libVLC:[Debug] main:Buffering 13%

libVLC:[Debug] main:no encoder modules matched

libVLC:[Error] stream_out_transcode:cannot find video encoder (module:any fourcc:h264). Take a look few lines earlier to see possible reason.

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Example repo of UWP project https://github.com/groovykool/libVLC-Transcode.git

Press "Play". View log box output errors wait a few seconds press "Stop"

no transcoded output

What is the expected correct behavior?

Transcoded video is saved in a file.

The transcoding options work in the VLC client.

Relevant logs and/or screenshots

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libVLC:[Error] avcodec:cannot find encoder H264 - MPEG-4 AVC (part 10)

*** Your Libav/FFmpeg installation is crippled. ***

*** Please check with your Libav/FFmpeg packager. ***

*** This is NOT a VLC media player issue. ***

libVLC:[Debug] main:Buffering 13%

libVLC:[Debug] main:no encoder modules matched

libVLC:[Error] stream_out_transcode:cannot find video encoder (module:any fourcc:h264). Take a look few lines earlier to see possible reason.

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Environment

• OS: Windows 10
• Version 1903
• Device: PC
• LibVLC version and architecture 3.0.4 Vetinari
• LibVLCSharp version Nuget 3.2.1

Possible fixes

libVLC compile options?

changed the description

Does it behave the same way outside of UWP? Did you try with the latest libvlc?

The latest libVLC thats included in the Nuget package is 3.04. How would I try a newer build?

Well, Martin needs to publish a new one, but he's away. Can you try with the recording sample, outside of UWP in the meantime?

I tried it in the RecordHLS sample and it worked fine. So I assume it is a problem with the UWP version of libVLC?

Regards, Tony

Seems to me that the UWP build on nuget (https://www.nuget.org/packages/VideoLAN.LibVLC.UWP/3.1.1 ) is missing the codec/libx264_plugin.dll, not sure about why. @mfkl, any idea?

@groovykool : I'm afraid you will have to wait martin's return.

Seems to me that the UWP build on nuget (https://www.nuget.org/packages/VideoLAN.LibVLC.UWP/3.1.1 ) is missing the codec/libx264_plugin.dll, not sure about why. @mfkl, any idea?

The libvlc build for UWP is inherently tied to the VLC UWP app needs. The current transcoding capabilities of the VLC UWP app did not need this plugin so it was not built.

added improvement libvlc uwp labels

mentioned in commit vlc-winrt@dbf8daf6

enabling x264 fails the build. Need to investigate further vlc-winrt!8

mentioned in commit mfkl/vlc-winrt@51c7aaaa

mentioned in issue #369