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Segmenter: do not split if this results in a tiny segment at the end, added flag for adjusting split time, always adjust targetDuration upwards to the largest segment found

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Marco van Dijk 2023-03-15 16:03:12 +01:00 • committed by Thulinma
parent c1885a7a54
commit 9779940c76
1 changed files with 16 additions and 6 deletions
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22
src/output/output.cpp
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@ -1320,6 +1320,10 @@ namespace Mist{
if (thisIdx != getMainSelectedTrack() || (!thisPacket.getFlag("keyframe") && M.getType(thisIdx) == "video")){
return false;
}
// If splitting would result in a tiny segment at the end, do not split
if (M.getVod() && (endTime() - lastPacketTime) < (atoll(targetParams["split"].c_str()) * 500)){
return false;
}
// is this a split point?
if (targetParams.count("nxt-split") && atoll(targetParams["nxt-split"].c_str()) <= lastPacketTime){
INFO_MSG("Split point reached");
@ -1358,6 +1362,7 @@ namespace Mist{
uint64_t targetAge = 0;
std::string targetDuration;
bool reInitPlaylist = false;
bool autoAdjustSplit = false;
Socket::Connection plsConn;
uint64_t systemBoot;
@ -1399,6 +1404,9 @@ namespace Mist{
if (targetParams.count("targetAge")){
targetAge = atoll(targetParams["targetAge"].c_str());
}
if (targetParams.count("adjustSplit")){
autoAdjustSplit = true;
}
// When segmenting to a playlist, handle any existing files and init some data
if (targetParams.count("m3u8")){
// Load system boot time from the global config
@ -1671,13 +1679,15 @@ namespace Mist{
double segmentDuration = (lastPacketTime - currentStartTime) / 1000.0;
tmp << "#EXTINF:" << std::fixed << std::setprecision(3) << segmentDuration << ",\n"+ segment + "\n";
playlistBuffer += tmp.str();
// Check if the targetDuration is still valid
if (segmentDuration > atoll(targetDuration.c_str())){
// Adjust split time up to half a segment duration
if (autoAdjustSplit && (segmentDuration / 2) > atoll(targetParams["split"].c_str())){
targetParams["split"] = JSON::Value(segmentDuration / 2).asString();
}
// Always adjust the targetDuration in the playlist upwards
if (segmentDuration > JSON::Value(targetDuration).asDouble()){
// Set the new targetDuration to the ceil of the segment duration
targetDuration = JSON::Value(uint64_t(segmentDuration) + 1).asString();
WARN_MSG("Segment #%" PRIu64 " has a longer duration than the target duration. Adjusting the targetDuration to %s seconds", segmentCount, targetDuration.c_str());
// Round the target split time down to ensure we split on the keyframe for very long keyframe intervals
targetParams["split"] = JSON::Value(uint64_t(segmentDuration)).asString();
WARN_MSG("Segment #%" PRIu64 " is longer than the target duration. Adjusting the targetDuration from %s to %f s", segmentCount, targetDuration.c_str(), segmentDuration);
targetDuration = JSON::Value((uint64_t)segmentDuration + 1).asString();
// Modify the buffer to contain the new targetDuration
if (!M.getLive()){
uint64_t unixMs = M.getBootMsOffset() + systemBoot + currentStartTime;