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Avoid using direct submit for video decoding because FFmpeg can delay for a fairly significant period of time within avcodec_send_packet() and avcodec_receive_frame(), even for software decoding. This is particularly apparent when streaming well above hardware capabilities and leads to packet loss.

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Cameron Gutman
2018-09-22 19:30:13 -07:00
parent b1de66d878
commit afb2b465a8
1 changed files with 0 additions and 3 deletions
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app/streaming/session.cpp
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@@ -294,9 +294,6 @@ void Session::initialize()
m_VideoCallbacks.setup = drSetup;
m_VideoCallbacks.submitDecodeUnit = drSubmitDecodeUnit;
// Submit for decode without using a separate thread
m_VideoCallbacks.capabilities |= CAPABILITY_DIRECT_SUBMIT;
// Slice up to 4 times for parallel decode, once slice per core
int slices = qMin(MAX_SLICES, SDL_GetCPUCount());
m_VideoCallbacks.capabilities |= CAPABILITY_SLICES_PER_FRAME(slices);