Hi, In the current code, extended timestamp is not added in Type 3 chunks when it is necessary. This causes some servers to disconnect the connection when receiving the chucks. FYI, the related section from the RTMP spec ( http://www.adobe.com/content/dam/Adobe/en/devnet/rtmp/pdf/rtmp_specification... <https://google.com/url?sa=D&q=http%3A%2F%2Fwww.adobe.com%2Fcontent%2Fdam%2FAdobe%2Fen%2Fdevnet%2Frtmp%2Fpdf%2Frtmp_specification_1.0.pdf>) is: 5.3.1.3. Extended Timestamp The Extended Timestamp field is used to encode timestamps or timestamp deltas that are greater than 16777215 (0xFFFFFF); that is, for timestamps or timestamp deltas that don’t fit in the 24 bit fields of Type 0, 1, or 2 chunks. This field encodes the complete 32-bit timestamp or timestamp delta. The presence of this field is indicated by setting the timestamp field of a Type 0 chunk, or the timestamp delta field of a Type 1 or 2 chunk, to 16777215 (0xFFFFFF). This field is present in Type 3 chunks when the most recent Type 0, 1, or 2 chunk for the same chunk stream ID indicated the presence of an extended timestamp field. This is my patch: diff --git a/librtmp/rtmp.c b/librtmp/rtmp.c index 60f251c..ca7db6a 100644 --- a/librtmp/rtmp.c +++ b/librtmp/rtmp.c @@ -3965,10 +3965,11 @@ RTMP_SendPacket(RTMP *r, RTMPPacket *packet, int queue) hSize += cSize; } - if (nSize > 1 && t >= 0xffffff) + if (t >= 0xffffff) { header -= 4; hSize += 4; + RTMP_Log(RTMP_LOGWARNING, "Larger timestamp than 24-bit: 0x%x", t); } hptr = header; @@ -4007,7 +4008,7 @@ RTMP_SendPacket(RTMP *r, RTMPPacket *packet, int queue) if (nSize > 8) hptr += EncodeInt32LE(hptr, packet->m_nInfoField2); - if (nSize > 1 && t >= 0xffffff) + if (t >= 0xffffff) hptr = AMF_EncodeInt32(hptr, hend, t); nSize = packet->m_nBodySize; @@ -4062,6 +4063,11 @@ RTMP_SendPacket(RTMP *r, RTMPPacket *packet, int queue) header -= cSize; hSize += cSize; } + if (t >= 0xffffff) + { + header -= 4; + hSize += 4; + } *header = (0xc0 | c); if (cSize) { @@ -4070,6 +4076,11 @@ RTMP_SendPacket(RTMP *r, RTMPPacket *packet, int queue) if (cSize == 2) header[2] = tmp >> 8; } + if (t >= 0xffffff) + { + char* extendedTimestamp = header + 1 + cSize; + AMF_EncodeInt32(extendedTimestamp, extendedTimestamp + 4, t); + } } } if (tbuf) Regards, Cheolho