public static FlvFile.Tag.ScriptTag CreatMetadataTag(Metadata metadata)
{
FlvFile.Tag.ScriptTag.EcmaArray ecmaArray = new FlvFile.Tag.ScriptTag.EcmaArray();
ecmaArray.Items.Add("creator", new FlvFile.Tag.ScriptTag.String(metadata.creator));
ecmaArray.Items.Add("metadatacreator", new FlvFile.Tag.ScriptTag.String(metadata.metadatacreator));
ecmaArray.Items.Add("hasKeyframes", new FlvFile.Tag.ScriptTag.Boolean(metadata.hasKeyframes));
ecmaArray.Items.Add("hasVideo", new FlvFile.Tag.ScriptTag.Boolean(metadata.hasVideo));
ecmaArray.Items.Add("hasAudio", new FlvFile.Tag.ScriptTag.Boolean(metadata.hasAudio));
ecmaArray.Items.Add("hasMetadata", new FlvFile.Tag.ScriptTag.Boolean(metadata.hasMetadata));
ecmaArray.Items.Add("canSeekToEnd", new FlvFile.Tag.ScriptTag.Boolean(metadata.canSeekToEnd));
ecmaArray.Items.Add("duration", new FlvFile.Tag.ScriptTag.Number(metadata.duration));
ecmaArray.Items.Add("datasize", new FlvFile.Tag.ScriptTag.Number(metadata.datasize));
ecmaArray.Items.Add("videosize", new FlvFile.Tag.ScriptTag.Number(metadata.videosize));
ecmaArray.Items.Add("framerate", new FlvFile.Tag.ScriptTag.Number(metadata.framerate));
ecmaArray.Items.Add("videodatarate", new FlvFile.Tag.ScriptTag.Number(metadata.videodatarate));
ecmaArray.Items.Add("videocodecid", new FlvFile.Tag.ScriptTag.Number(metadata.videocodecid));
ecmaArray.Items.Add("width", new FlvFile.Tag.ScriptTag.Number(metadata.width));
ecmaArray.Items.Add("height", new FlvFile.Tag.ScriptTag.Number(metadata.height));
ecmaArray.Items.Add("audiosize", new FlvFile.Tag.ScriptTag.Number(metadata.audiosize));
ecmaArray.Items.Add("audiodatarate", new FlvFile.Tag.ScriptTag.Number(metadata.audiodatarate));
ecmaArray.Items.Add("audiocodecid", new FlvFile.Tag.ScriptTag.Number(metadata.audiocodecid));
ecmaArray.Items.Add("audiosamplerate", new FlvFile.Tag.ScriptTag.Number(metadata.audiosamplerate));
ecmaArray.Items.Add("audiosamplesize", new FlvFile.Tag.ScriptTag.Number(metadata.audiosamplesize));
ecmaArray.Items.Add("stereo", new FlvFile.Tag.ScriptTag.Boolean(metadata.stereo));
ecmaArray.Items.Add("filesize", new FlvFile.Tag.ScriptTag.Number(metadata.filesize));
ecmaArray.Items.Add("lasttimestamp", new FlvFile.Tag.ScriptTag.Number(metadata.lasttimestamp));
ecmaArray.Items.Add("lastkeyframetimestamp", new FlvFile.Tag.ScriptTag.Number(metadata.lastkeyframetimestamp));
ecmaArray.Items.Add("lastkeyframelocation", new FlvFile.Tag.ScriptTag.Number(metadata.lastkeyframelocation));
FlvFile.Tag.ScriptTag.Object keyframes = new FlvFile.Tag.ScriptTag.Object();
FlvFile.Tag.ScriptTag.StrictArray filepositions = new FlvFile.Tag.ScriptTag.StrictArray();
foreach (uint fileposition in metadata.keyframesFilepositions)
{
filepositions.Items.Add(new FlvFile.Tag.ScriptTag.Number(fileposition));
}
keyframes.Items.Add("filepositions", filepositions);
FlvFile.Tag.ScriptTag.StrictArray times = new FlvFile.Tag.ScriptTag.StrictArray();
foreach (double time in metadata.keyframesTimes)
{
times.Items.Add(new FlvFile.Tag.ScriptTag.Number(time));
}
keyframes.Items.Add("times", times);
ecmaArray.Items.Add("keyframes", keyframes);
FlvFile.Tag.ScriptTag scriptTag = new FlvFile.Tag.ScriptTag("onMetaData", ecmaArray);
scriptTag.Header.DataSize = scriptTag.BodyLength;
uint offset = scriptTag.TagLengthWithPts + FlvFile.FlvHeader.HeaderLengthWithPts;
((FlvFile.Tag.ScriptTag.Number)ecmaArray.Items["filesize"]).Value += offset;
((FlvFile.Tag.ScriptTag.Number)ecmaArray.Items["lastkeyframelocation"]).Value += offset;
foreach (FlvFile.Tag.ScriptTag.ScriptData scriptData in filepositions.Items)
{
((FlvFile.Tag.ScriptTag.Number)scriptData).Value += offset;
}
return(scriptTag);
}
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);
}
}
}
