static void Main(string[] args)
{
Stopwatch stopwatch = new Stopwatch();
while (true)
{
stopwatch.Start();
FlvUtil.FlvMerge(new string[] { "1.flv", "1.flv", "1.flv", "1.flv" }, "o.flv");
stopwatch.Stop();
FlvFile.Tag metadataTag;
using (FlvFile flvFile = new FlvFile("o.flv"))
{
metadataTag = flvFile.ReadTag();
}
Console.WriteLine("Metadata: \r\n");
Console.WriteLine(metadataTag);
Console.WriteLine("\r\n");
Console.WriteLine("Timer: {0} ms", stopwatch.ElapsedMilliseconds);
stopwatch.Reset();
Console.ReadLine();
}
}
public static void FlvMerge(string[] inputs, string output)
{
MetadataTagCreater.Metadata metadata = new MetadataTagCreater.Metadata(creator, matadatacreator);
uint timestampOffset = 0;
foreach (string input in inputs)
{
using (FlvFile flv = new FlvFile(input))
{
while (true)
{
FlvFile.Tag tag = flv.ReadTag();
if (tag == null)
{
break;
}
if (tag.Type == FlvFile.Tag.TagType.Script)
{
FlvFile.Tag.ScriptTag scriptTag = (FlvFile.Tag.ScriptTag)tag;
FlvFile.Tag.ScriptTag.String tagName = (FlvFile.Tag.ScriptTag.String)scriptTag.Name;
if (tagName.Value == "onMetaData")
{
FlvFile.Tag.ScriptTag.EcmaArray tagValue = (FlvFile.Tag.ScriptTag.EcmaArray)scriptTag.Value;
metadata.hasKeyframes |= ((FlvFile.Tag.ScriptTag.Boolean)tagValue.Items["hasKeyframes"]).Value;
metadata.hasVideo |= ((FlvFile.Tag.ScriptTag.Boolean)tagValue.Items["hasVideo"]).Value;
metadata.hasAudio |= ((FlvFile.Tag.ScriptTag.Boolean)tagValue.Items["hasAudio"]).Value;
metadata.hasMetadata |= ((FlvFile.Tag.ScriptTag.Boolean)tagValue.Items["hasMetadata"]).Value;
metadata.canSeekToEnd |= ((FlvFile.Tag.ScriptTag.Boolean)tagValue.Items["canSeekToEnd"]).Value;
metadata.duration += ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["duration"]).Value;
metadata.videocodecid = ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["videocodecid"]).Value;
metadata.width = ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["width"]).Value;
metadata.height = ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["height"]).Value;
metadata.audiocodecid = ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["audiocodecid"]).Value;
metadata.audiosamplerate = ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["audiosamplerate"]).Value;
metadata.audiosamplesize = ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["audiosamplesize"]).Value;
metadata.stereo |= ((FlvFile.Tag.ScriptTag.Boolean)tagValue.Items["stereo"]).Value;
}
}
else
{
metadata.datasize += tag.TagLengthWithPts;
metadata.lasttimestamp = tag.Header.Timestamp + timestampOffset;
if (tag.Type == FlvFile.Tag.TagType.Video)
{
FlvFile.Tag.VideoTag videoTag = (FlvFile.Tag.VideoTag)tag;
metadata.videosize += videoTag.TagLength;
metadata.framerate++;
metadata.videodatarate += videoTag.BodyLength;
if (videoTag.FrameType == FlvFile.Tag.VideoTag.FrameTypes.KeyFrame)
{
metadata.lastkeyframetimestamp = videoTag.Header.Timestamp + timestampOffset;
metadata.lastkeyframelocation = (uint)metadata.filesize;
metadata.keyframesFilepositions.Add((uint)metadata.filesize);
metadata.keyframesTimes.Add((double)(videoTag.Header.Timestamp + timestampOffset) / 1000);
}
}
else if (tag.Type == FlvFile.Tag.TagType.Audio)
{
FlvFile.Tag.AudioTag audioTag = (FlvFile.Tag.AudioTag)tag;
metadata.audiosize += audioTag.TagLength;
metadata.audiodatarate += audioTag.BodyLength;
}
metadata.filesize += tag.TagLengthWithPts;
}
}
}
timestampOffset = (uint)(metadata.duration * 1000);
}
metadata.framerate /= metadata.duration;
metadata.videodatarate /= metadata.duration * 1024 / 8;
metadata.audiodatarate /= metadata.duration * 1024 / 8;
metadata.lasttimestamp /= 1000;
metadata.lastkeyframetimestamp /= 1000;
FlvFile.Tag.ScriptTag metadataTag = MetadataTagCreater.CreatMetadataTag(metadata);
FlvFile.FlvHeader flvHeader = new FlvFile.FlvHeader(FlvFile.FlvHeader.StreamFlag.VideoAndAudio);
timestampOffset = 0;
using (FileStream fileStream = new FileStream(output, FileMode.Create))
{
fileStream.Write(flvHeader.HeaderBytes, 0, flvHeader.HeaderBytes.Length);
byte[] metadataBytes = metadataTag.TagBytesWithPts;
fileStream.Write(metadataBytes, 0, metadataBytes.Length);
double duration = 0;
foreach (string input in inputs)
{
using (FlvFile flv = new FlvFile(input))
{
while (true)
{
FlvFile.Tag tag = flv.ReadTag();
if (tag == null)
{
break;
}
if (tag.Type == FlvFile.Tag.TagType.Script)
{
FlvFile.Tag.ScriptTag scriptTag = (FlvFile.Tag.ScriptTag)tag;
FlvFile.Tag.ScriptTag.String tagName = (FlvFile.Tag.ScriptTag.String)scriptTag.Name;
if (tagName.Value == "onMetaData")
{
FlvFile.Tag.ScriptTag.EcmaArray tagValue = (FlvFile.Tag.ScriptTag.EcmaArray)scriptTag.Value;
duration += ((FlvFile.Tag.ScriptTag.Number)tagValue.Items["duration"]).Value;
}
}
else
{
tag.Header.Timestamp += timestampOffset;
byte[] buffer = tag.TagBytesWithPts;
fileStream.Write(buffer, 0, buffer.Length);
}
}
}
timestampOffset = (uint)(duration * 1000);
}
}
}
