update PCR sync logic

lib/tslimit.js

@@ -90,8 +90,9 @@ TsLimit.prototype._transform = function(chunk, output, cb) {
       var pcr = parsePCR(buf.slice(i, i+188));
       if (pcr !== -1) {
         var pcrtime = self.pcr2time(pcr);
-        if (Math.abs(pcrtime - self.time) > 100E3) {
-          console.error('PCR_error: '+((pcrtime - self.time)/1E6).toFixed(2)+'s missing');
+        var delta = pcrtime - self.time;
+        if (delta > 100E3 || delta < -500E3) {
+          console.error('PCR_error: '+(delta/1E6).toFixed(2)+'s missing');
           var elapsed = now - self.time;
           if (now < self.time || now > pcrtime) {
             console.error('PCR sync reset');