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Add hack to prevent video glitching on GFE 3.22 when packets per frame exceed 120

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This commit is contained in:
Cameron Gutman 2021-04-09 19:30:38 -05:00
parent 31433fc5ee
commit 5782246b30
1 changed files with 20 additions and 5 deletions
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25
src/SdpGenerator.c
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@ -150,21 +150,36 @@ static int addGen5Options(PSDP_OPTION* head) {
// Ask for the encrypted control protocol to ensure remote input will be encrypted.
// This used to be done via separate RI encryption, but now it is all or nothing.
err |= addAttributeString(head, "x-nv-general.useReliableUdp", "13");
if (StreamConfig.bitrate >= 30000 || StreamConfig.width * StreamConfig.height >= 3840 * 2160) {
// HACK: GFE 3.22 will split frames into 2 FEC blocks (sharing a frame number)
// if the number of packets exceeds ~120. We can't correctly handle those, so
// we'll turn off FEC at bitrates above 30 Mbps as an interim hack.
err |= addAttributeString(head, "x-nv-vqos[0].fec.repairPercent", "0");
err |= addAttributeString(head, "x-nv-vqos[0].fec.numSrcPackets", "511");
}
else {
err |= addAttributeString(head, "x-nv-vqos[0].fec.repairPercent", "20");
err |= addAttributeString(head, "x-nv-vqos[0].fec.numSrcPackets", "125");
}
}
else {
// We want to use the new ENet connections for control and input
err |= addAttributeString(head, "x-nv-general.useReliableUdp", "1");
err |= addAttributeString(head, "x-nv-ri.useControlChannel", "1");
// When streaming 4K, lower FEC levels to reduce stream overhead
if (StreamConfig.width >= 3840 && StreamConfig.height >= 2160) {
err |= addAttributeString(head, "x-nv-vqos[0].fec.repairPercent", "5");
}
else {
err |= addAttributeString(head, "x-nv-vqos[0].fec.repairPercent", "20");
}
}
// Disable dynamic resolution switching
err |= addAttributeString(head, "x-nv-vqos[0].drc.enable", "0");
// When streaming 4K, lower FEC levels to reduce stream overhead
if (StreamConfig.width >= 3840 && StreamConfig.height >= 2160) {
err |= addAttributeString(head, "x-nv-vqos[0].fec.repairPercent", "5");
}
// Recovery mode can cause the FEC percentage to change mid-frame, which
// breaks many assumptions in RTP FEC queue.
err |= addAttributeString(head, "x-nv-general.enableRecoveryMode", "0");