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https://github.com/BililiveRecorder/BililiveRecorder.git
synced 2024-11-15 19:22:19 +08:00
FLV: Add allow missing header output mode, update processing rules
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@ -26,7 +26,7 @@ namespace BililiveRecorder.Flv.Pipeline
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builder
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.Add<HandleEndTagRule>()
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.Add<HandleDelayedAudioHeaderRule>()
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.Add<CheckMissingKeyframeRule>()
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// TODO .Add<CheckMissingKeyframeRule>()
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.Add<UpdateDataTagOrderRule>()
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.Add<CheckDiscontinuityRule>()
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.Add<UpdateTimestampRule>()
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@ -19,7 +19,9 @@ namespace BililiveRecorder.Flv.Pipeline.Rules
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public void Run(FlvProcessingContext context, Action next)
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{
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context.PerActionRun(this.RunPerAction);
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// context.PerActionRun(this.RunPerAction);
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// 暂时禁用此规则,必要性待定
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// TODO
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next();
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}
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@ -31,88 +31,50 @@ namespace BililiveRecorder.Flv.Pipeline.Rules
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{
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if (action is PipelineHeaderAction header)
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{
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Tag? lastVideoHeader, lastAudioHeader;
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Tag? currentVideoHeader, currentAudioHeader;
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var multiple_header_present = false;
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// 从 Session Items 里取上次写入的 Header
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lastVideoHeader = context.SessionItems.ContainsKey(VIDEO_HEADER_KEY) ? context.SessionItems[VIDEO_HEADER_KEY] as Tag : null;
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lastAudioHeader = context.SessionItems.ContainsKey(AUDIO_HEADER_KEY) ? context.SessionItems[AUDIO_HEADER_KEY] as Tag : null;
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var lastVideoHeader = context.SessionItems.ContainsKey(VIDEO_HEADER_KEY) ? context.SessionItems[VIDEO_HEADER_KEY] as Tag : null;
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var lastAudioHeader = context.SessionItems.ContainsKey(AUDIO_HEADER_KEY) ? context.SessionItems[AUDIO_HEADER_KEY] as Tag : null;
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var multiple_header_present = false;
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// 音频 视频 分别单独处理
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var group = header.AllTags.GroupBy(x => x.Type);
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{ // 音频
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var group_audio = group.FirstOrDefault(x => x.Key == TagType.Audio);
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if (group_audio != null)
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{
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// 检查是否存在 **多个** **不同的** Header
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if (group_audio.Count() > 1)
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{
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var first = group_audio.First();
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if (group_audio.Skip(1).All(x => first.BinaryData?.SequenceEqual(x.BinaryData) ?? false))
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currentAudioHeader = first;
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else
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{
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// 默认最后一个为正确的
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currentAudioHeader = group_audio.Last();
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multiple_header_present = true;
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}
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}
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else currentAudioHeader = group_audio.FirstOrDefault();
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}
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else currentAudioHeader = null;
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}
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{ // 视频
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var group_video = group.FirstOrDefault(x => x.Key == TagType.Video);
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if (group_video != null)
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{
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// 检查是否存在 **多个** **不同的** Header
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if (group_video.Count() > 1)
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{
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var first = group_video.First();
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if (group_video.Skip(1).All(x => first.BinaryData?.SequenceEqual(x.BinaryData) ?? false))
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currentVideoHeader = first;
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else
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{
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// 默认最后一个为正确的
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currentVideoHeader = group_video.Last();
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multiple_header_present = true;
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}
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}
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else currentVideoHeader = group_video.FirstOrDefault();
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}
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else currentVideoHeader = null;
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}
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var currentVideoHeader = SelectHeader(ref multiple_header_present, group.FirstOrDefault(x => x.Key == TagType.Video));
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var currentAudioHeader = SelectHeader(ref multiple_header_present, group.FirstOrDefault(x => x.Key == TagType.Audio));
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if (multiple_header_present)
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context.AddComment(MultipleHeaderComment);
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// 是否需要创建新文件
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// 如果存在多个不同 Header 则必定创建新文件
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var split_file = multiple_header_present;
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DecideSplit(ref lastVideoHeader, ref currentVideoHeader, ref split_file);
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DecideSplit(ref lastAudioHeader, ref currentAudioHeader, ref split_file);
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if (currentVideoHeader != null)
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context.SessionItems[VIDEO_HEADER_KEY] = currentVideoHeader.Clone(); // TODO use memory provider
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if (currentAudioHeader != null)
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context.SessionItems[AUDIO_HEADER_KEY] = currentAudioHeader.Clone();
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// 是否需要创建新文件
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// 如果存在多个不同 Header 则必定创建新文件
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var split_file = multiple_header_present;
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// 如果最终选中的 Header 不等于上次写入的 Header
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if (currentAudioHeader is not null && lastAudioHeader is not null && !(currentAudioHeader.BinaryData?.SequenceEqual(lastAudioHeader.BinaryData) ?? false))
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split_file = true;
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if (currentVideoHeader is not null && lastVideoHeader is not null && !(currentVideoHeader.BinaryData?.SequenceEqual(lastVideoHeader.BinaryData) ?? false))
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split_file = true;
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//if (currentAudioHeader is not null && lastAudioHeader is not null && !(currentAudioHeader.BinaryData?.SequenceEqual(lastAudioHeader.BinaryData) ?? false))
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// split_file = true;
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//if (currentVideoHeader is not null && lastVideoHeader is not null && !(currentVideoHeader.BinaryData?.SequenceEqual(lastVideoHeader.BinaryData) ?? false))
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// split_file = true;
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if (split_file && !multiple_header_present)
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var notFirstTime = lastAudioHeader is not null || lastVideoHeader is not null;
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if (notFirstTime // 第一次触发规则不判定为有问题
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&& split_file
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&& !multiple_header_present)
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context.AddComment(SplitFileComment);
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if (split_file)
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if (notFirstTime && split_file)
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yield return PipelineNewFileAction.Instance;
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if (split_file || (lastAudioHeader is null && lastVideoHeader is null))
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if (split_file)
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yield return new PipelineHeaderAction(Array.Empty<Tag>())
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{
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AudioHeader = currentAudioHeader?.Clone(),
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@ -128,5 +90,80 @@ namespace BililiveRecorder.Flv.Pipeline.Rules
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else
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yield return action;
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}
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private static Tag? SelectHeader(ref bool multiple_header_present, IGrouping<TagType, Tag> tagGroup)
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{
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Tag? currentHeader;
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if (tagGroup != null)
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{
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// 检查是否存在 **多个** **不同的** Header
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if (tagGroup.Count() > 1)
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{
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var first = tagGroup.First();
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if (tagGroup.Skip(1).All(x => first.BinaryData?.SequenceEqual(x.BinaryData) ?? false))
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currentHeader = first;
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else
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{
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// 默认最后一个为正确的
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currentHeader = tagGroup.Last();
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multiple_header_present = true;
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}
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}
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else
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currentHeader = tagGroup.FirstOrDefault();
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}
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else
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currentHeader = null;
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return currentHeader;
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}
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private static void DecideSplit(ref Tag? lastHeader, ref Tag? currentHeader, ref bool split_file)
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{
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if (lastHeader is null)
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{
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if (currentHeader is null)
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{
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// 从未出现过、并且本次还没收到
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// 忽略不动
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}
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else
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{
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// 之前未出现过 header
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// 所以以新收到的为准并切割文件
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// currentHeader = currentHeader;
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split_file = true;
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}
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}
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else
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{
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if (currentHeader is null)
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{
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// 以前收到过 header 但是本次没收到
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// 说明是收到了另一种 header
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// 使用上次收到的 header
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currentHeader = lastHeader;
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}
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else
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{
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// 之前收到过、这次也收到了
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// 对 header 内容进行对比
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if (currentHeader.BinaryData?.SequenceEqual(lastHeader.BinaryData) ?? false) // 如果 BinaryData 为 null 则判定为不相同
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{
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// 如果内容相同、则忽略
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// currentHeader = currentHeader;
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}
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else
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{
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// 如果内容不同,则使用新收到的 header 并切分文件
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// currentHeader = currentHeader;
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split_file = true;
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}
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}
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}
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}
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}
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}
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@ -88,17 +88,16 @@ namespace BililiveRecorder.Flv.Pipeline.Rules
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private int CalculateNewTarget(IReadOnlyList<Tag> tags)
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{
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var video = CalculatePerChannel(tags, VIDEO_DURATION_FALLBACK, VIDEO_DURATION_MAX, VIDEO_DURATION_MIN, TagType.Video);
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// 有可能出现只有音频或只有视频的情况
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int video = 0, audio = 0;
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if (tags.Any(x => x.Type == TagType.Video))
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video = CalculatePerChannel(tags, VIDEO_DURATION_FALLBACK, VIDEO_DURATION_MAX, VIDEO_DURATION_MIN, TagType.Video);
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if (tags.Any(x => x.Type == TagType.Audio))
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{
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var audio = CalculatePerChannel(tags, AUDIO_DURATION_FALLBACK, AUDIO_DURATION_MAX, AUDIO_DURATION_MIN, TagType.Audio);
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return Math.Max(video, audio);
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}
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else
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{
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return video;
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}
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audio = CalculatePerChannel(tags, AUDIO_DURATION_FALLBACK, AUDIO_DURATION_MAX, AUDIO_DURATION_MIN, TagType.Audio);
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return Math.Max(video, audio);
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static int CalculatePerChannel(IReadOnlyList<Tag> tags, int fallback, int max, int min, TagType type)
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{
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@ -10,6 +10,7 @@ namespace BililiveRecorder.Flv.Writer
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{
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private readonly SemaphoreSlim semaphoreSlim = new SemaphoreSlim(1, 1);
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private readonly IFlvTagWriter tagWriter;
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private readonly bool allowMissingHeader;
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private bool disposedValue;
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private WriterState state = WriterState.EmptyFileOrNotOpen;
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@ -26,9 +27,13 @@ namespace BililiveRecorder.Flv.Writer
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public Action<ScriptTagBody>? BeforeScriptTagWrite { get; set; }
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public Action<ScriptTagBody>? BeforeScriptTagRewrite { get; set; }
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public FlvProcessingContextWriter(IFlvTagWriter tagWriter)
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public FlvProcessingContextWriter(IFlvTagWriter tagWriter) : this(tagWriter: tagWriter, allowMissingHeader: false)
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{ }
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public FlvProcessingContextWriter(IFlvTagWriter tagWriter, bool allowMissingHeader)
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{
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this.tagWriter = tagWriter ?? throw new ArgumentNullException(nameof(tagWriter));
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this.allowMissingHeader = allowMissingHeader;
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}
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public async Task WriteAsync(FlvProcessingContext context)
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@ -178,15 +183,25 @@ namespace BililiveRecorder.Flv.Writer
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private async Task WriteHeaderTagsImpl()
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{
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if (this.nextVideoHeaderTag is null)
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throw new InvalidOperationException("No video header tag availible");
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if (this.allowMissingHeader)
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{
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if (this.nextVideoHeaderTag is not null)
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await this.tagWriter.WriteTag(this.nextVideoHeaderTag).ConfigureAwait(false);
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if (this.nextAudioHeaderTag is null)
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throw new InvalidOperationException("No audio header tag availible");
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if (this.nextAudioHeaderTag is not null)
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await this.tagWriter.WriteTag(this.nextAudioHeaderTag).ConfigureAwait(false);
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}
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else
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{
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if (this.nextVideoHeaderTag is null)
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throw new InvalidOperationException("No video header tag availible");
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await this.tagWriter.WriteTag(this.nextVideoHeaderTag).ConfigureAwait(false);
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await this.tagWriter.WriteTag(this.nextAudioHeaderTag).ConfigureAwait(false);
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if (this.nextAudioHeaderTag is null)
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throw new InvalidOperationException("No audio header tag availible");
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await this.tagWriter.WriteTag(this.nextVideoHeaderTag).ConfigureAwait(false);
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await this.tagWriter.WriteTag(this.nextAudioHeaderTag).ConfigureAwait(false);
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}
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this.state = WriterState.Writing;
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}
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@ -56,7 +56,7 @@ namespace BililiveRecorder.ToolBox.Commands
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using var inputStream = File.OpenRead(inputPath);
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using var grouping = new TagGroupReader(new FlvTagPipeReader(PipeReader.Create(inputStream), memoryStreamProvider, skipData: false, logger: logger));
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using var writer = new FlvProcessingContextWriter(tagWriter);
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using var writer = new FlvProcessingContextWriter(tagWriter: tagWriter, allowMissingHeader: true);
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var pipeline = new ProcessingPipelineBuilder(new ServiceCollection().BuildServiceProvider()).AddDefault().AddRemoveFillerData().Build();
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var count = 0;
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@ -64,7 +64,7 @@ namespace BililiveRecorder.ToolBox.Commands
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using var inputStream = File.OpenRead(inputPath);
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using var grouping = new TagGroupReader(new FlvTagPipeReader(PipeReader.Create(inputStream), memoryStreamProvider, skipData: false, logger: logger));
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using var writer = new FlvProcessingContextWriter(tagWriter);
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using var writer = new FlvProcessingContextWriter(tagWriter: tagWriter, allowMissingHeader: true);
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var pipeline = new ProcessingPipelineBuilder(new ServiceCollection().BuildServiceProvider()).AddDefault().AddRemoveFillerData().Build();
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var count = 0;
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@ -48,7 +48,10 @@ namespace BililiveRecorder.Flv.RuleTests.Integrated
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Assert.Equal(expected.TagCount, actual.Count);
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this.AssertTagsShouldPassBasicChecks(actual);
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// TODO 重写相关测试的检查,支持只有音频或视频 header 的数据片段
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if (!expected.SkipTagCheck)
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this.AssertTagsShouldPassBasicChecks(actual);
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if (expected.VideoHeaderData is not null)
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Assert.Equal(expected.VideoHeaderData, actual[1].BinaryDataForSerializationUseOnly);
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@ -56,7 +59,8 @@ namespace BililiveRecorder.Flv.RuleTests.Integrated
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if (expected.AudioHeaderData is not null)
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Assert.Equal(expected.AudioHeaderData, actual[2].BinaryDataForSerializationUseOnly);
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await this.AssertTagsByRerunPipeline(actual).ConfigureAwait(false);
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if (!expected.SkipTagCheck)
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await this.AssertTagsByRerunPipeline(actual).ConfigureAwait(false);
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}
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}
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@ -76,6 +80,9 @@ namespace BililiveRecorder.Flv.RuleTests.Integrated
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public string? AudioHeaderData { get; set; }
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public int TagCount { get; set; }
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// TODO 采用更合理的检查方法而不是直接跳过
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public bool SkipTagCheck { get; set; }
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}
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}
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}
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@ -31,7 +31,7 @@ namespace BililiveRecorder.Flv.RuleTests.Integrated
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protected async Task RunPipeline(ITagGroupReader reader, IFlvTagWriter output, List<ProcessingComment> comments)
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{
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var writer = new FlvProcessingContextWriter(output);
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var writer = new FlvProcessingContextWriter(tagWriter: output, allowMissingHeader: true);
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var session = new Dictionary<object, object?>();
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var context = new FlvProcessingContext();
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var pipeline = this.BuildPipeline();
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@ -0,0 +1,26 @@
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问题: 开头缺一个 header + 一段只有音频的数据
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```xml
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Script Tag 略
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<Tag Type="Audio" Flag="Header" Size="7" Timestamp="0">
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<BinaryData>AF00119056E500</BinaryData>
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</Tag>
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<Tag Type="Audio" Flag="Header" Size="7" Timestamp="0">
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<BinaryData>AF00119056E500</BinaryData>
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</Tag>
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<Tag Type="Audio" Flag="None" Size="8" Timestamp="0" />
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...
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全 Audio Data
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...
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<Tag Type="Video" Flag="Header Keyframe" Size="59" Timestamp="8011">
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<BinaryData>170000000001640028FFE1002767640028AC2CA501E0089F97016A020202800001F40000753070000016E36000016E360DDE5C1401000468EB8F2C</BinaryData>
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</Tag>
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<Tag Type="Video" Flag="Keyframe" Size="231930" Timestamp="8045">
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<Nalus StartPosition="9" FullSize="12" Type="Sei" />
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<Nalus StartPosition="25" FullSize="8" Type="Sei" />
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<Nalus StartPosition="37" FullSize="231893" Type="CodedSliceOfAnIdrPicture" />
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</Tag>
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...
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正常数据
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```
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@ -0,0 +1,21 @@
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{
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"AlternativeHeaderCount": 0,
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"AllowedComments": {
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"DecodingHeader": 1,
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"TimestampJump": 1
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},
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"Files": [
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{
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"TagCount": 375,
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"VideoHeaderData": "AF00119056E500",
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"AudioHeaderData": null,
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"___备注": "这部分测试逻辑还需要再修改",
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"SkipTagCheck": true
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},
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{
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"TagCount": 366,
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"VideoHeaderData": "170000000001640028FFE1002767640028AC2CA501E0089F97016A020202800001F40000753070000016E36000016E360DDE5C1401000468EB8F2C",
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"AudioHeaderData": "AF00119056E500"
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}
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]
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}
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