I have created a simple demo with UE5.2 and PixelStreaming plugin, it works on bare linux machine, but fails on docker env when a player connected to pixel streaming http page, the game just flush printing error logs:
[2024.01.24-12.57.10:738][377]LogAVCodecs: Error: Error Creating: Failed to initialize encoder [NVENC 8]
[2024.01.24-12.57.10:755][382]LogAVCodecs: Error: Error Creating: Failed to initialize encoder [NVENC 8]
[2024.01.24-12.57.10:755][382]LogAVCodecs: Error: Error Creating: Failed to initialize encoder [NVENC 8]
[2024.01.24-12.57.10:769][387]LogAVCodecs: Error: Error Creating: Failed to initialize encoder [NVENC 8]
[2024.01.24-12.57.10:769][387]LogAVCodecs: Error: Error Creating: Failed to initialize encoder [NVENC 8]
[2024.01.24-12.57.10:787][392]LogAVCodecs: Error: Error Creating: Failed to initialize encoder [NVENC 8]
the docker image inherited from ghcr.io/epicgames/unreal-engine:runtime-pixel-streaming, and when the game starts, from nvidia-smi I can see it consuming the GPU.
ffmpeg -hwaccel cuda -i input.mp4 -c:v h264_nvenc -preset fast output.mp4
it works, and during converting, nvidia-smi dmon -s u shows that GPU was working on encoding. So, it might not be the problem of the driver or docker environment.
So there could be a number of issues with this, but the first one that comes to mind is a potentially massive resolution.
If you’re running on an ultra wide for example, Pixel Streaming may pick up on that and try and stream at a resolution that NVENC can not handle.
Please try running again with -ResX=1920 -ResY=1080 in your launch args and see if this helps resolve the issue.
I actually started it with ’ -ResX 1920 -ResY 1080 -ForceRes ', and tried without ForceRes too, the error log still be the same. I thought these options might be irrelevant so not mentioned here, sorry for the misleading.
recently I noticed another log:
[2024.01.29-07.20.59:655][526]LogPixelStreaming: Error: Selected codec was not a supported codec, falling back to negotiating codecs...
[2024.01.29-07.20.59:655][526]LogPixelStreaming: OnRenegotiationNeeded
this refers to code:
// If we are not negotiating codecs simply return just the one codec that is selected in UE
if (!Settings::CVarPixelStreamingWebRTCNegotiateCodecs.GetValueOnAnyThread())
{
const EPixelStreamingCodec SelectedCodec = UE::PixelStreaming::Settings::GetSelectedCodec();
if (CodecMap.Contains(SelectedCodec))
{
for (auto& Format : CodecMap[SelectedCodec])
{
SupportedFormats.push_back(Format);
}
return SupportedFormats;
}
else
{
UE_LOG(LogPixelStreaming, Error, TEXT("Selected codec was not a supported codec, falling back to negotiating codecs..."));
}
}
I’m not familiar to UE source, I need some time figure out what is wrong there. If you have suggestions please let me know, thanks.
One more thing, I have tried -PixelStreamingEncoder="VP8|VP9" forcing using software encoder, but it didn’t work, is this argument still support? I didn’t find it in the document
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