public void FixMetadata()
{
if (Metadata == null)
{
logger.Log("No metadata packet found. Creating new.");
Metadata = new MetadataPacket(FLVHeader.HEADER_SIZE);
Packets.Insert(0, Metadata);
}
// remove meaningless stuff
Metadata.Variables.Remove("metadatacreator");
Metadata.Variables.Remove("creationdate");
Metadata.Variables.Remove("metadatadate");
Metadata.Variables.Remove("datasize");
Metadata.Variables.Remove("videodatarate");
Metadata.Variables.Remove("audiodatarate");
// lil` improvement
Metadata.Variables["canSeekToEnd"] = true;
// latest frame
TimeSpan maxTimeStamp = Packets.Max(e => e.TimeStamp);
// update seeking fields
Metadata.Variables["duration"] = maxTimeStamp.TotalSeconds;
Metadata.Variables["lasttimestamp"] = maxTimeStamp.TotalSeconds;
// update last key frame, if possible
BasePacket lastKeyFrame = Packets.LastOrDefault(e => e.PacketType == PacketType.VideoPayload && ((VideoPacket)e).FrameType == VideoFrameType.KeyFrame);
if (lastKeyFrame != null)
{
Metadata.Variables["lastkeyframetimestamp"] = lastKeyFrame.TimeStamp.TotalSeconds;
}
logger.Log(" -- Video duration: {0} seconds", maxTimeStamp.TotalSeconds);
// first audio/video packets
VideoPacket videoPacket = (VideoPacket)Packets.First(e => e.PacketType == PacketType.VideoPayload);
AudioPacket audioPacket = (AudioPacket)Packets.FirstOrDefault(e => e.PacketType == PacketType.AudioPayload);
if (audioPacket == null)
{
Header.Flags &= ~FLVFlags.Audio;
Metadata.Variables.Remove("audiosamplerate");
Metadata.Variables.Remove("audiosamplesize");
Metadata.Variables.Remove("stereo");
Metadata.Variables.Remove("audiocodecid");
Metadata.Variables.Remove("audiodelay");
Metadata.Variables.Remove("audiosize");
logger.Log(" -- Audio: no");
}
else
{
// update audio data
Metadata.Variables["audiosamplerate"] = audioPacket.GetSampleRate();
Metadata.Variables["audiosamplesize"] = audioPacket.GetSoundSize();
Metadata.Variables["stereo"] = audioPacket.GetStereo();
Metadata.Variables["audiocodecid"] = audioPacket.GetSoundFormat();
Metadata.Variables["audiodelay"] = videoPacket.TimeStamp.TotalSeconds;
Metadata.Variables["audiosize"] = (double)AudioDataBytes;
logger.Log(
" -- Audio: {0} Hz {1} bits {2} Codec: {3} Delay {4} sec",
audioPacket.GetSampleRate(),
audioPacket.GetSoundSize(),
audioPacket.GetStereo() ? "stereo" : "mono",
audioPacket.SoundFormat,
videoPacket.TimeStamp.TotalSeconds
);
}
// update video data
Metadata.Variables["videosize"] = (double)VideoDataBytes;
Metadata.Variables["videocodecid"] = videoPacket.GetCodecId();
logger.Log(" -- Video codec: {0}", videoPacket.CodecId);
videoPacket = (VideoPacket)Packets.FirstOrDefault(e => e.PacketType == PacketType.VideoPayload && ((VideoPacket)e).Width > 0 && ((VideoPacket)e).Height > 0);
if (videoPacket != null)
{
Metadata.Variables["width"] = (double)videoPacket.Width;
Metadata.Variables["height"] = (double)videoPacket.Height;
logger.Log(" -- Video dimensions: {0}x{1}", videoPacket.Width, videoPacket.Height);
}
}
