From f93ee1a42e8c47e472332287b7350b66a6b0fa11 Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期五, 24 七月 2020 18:28:57 +0800
Subject: [PATCH] 保存触发id之后的视频作为触发视频
---
csrc/ffmpeg/format/FormatOut.cpp | 146 ++++++++++++++++++++++++++++++------------------
1 files changed, 91 insertions(+), 55 deletions(-)
diff --git a/csrc/ffmpeg/format/FormatOut.cpp b/csrc/ffmpeg/format/FormatOut.cpp
index dce3f7e..e832bfe 100644
--- a/csrc/ffmpeg/format/FormatOut.cpp
+++ b/csrc/ffmpeg/format/FormatOut.cpp
@@ -31,6 +31,8 @@
,record_(false)
,fps_(0.0f)
,format_name_("mp4")
+ ,in_v_stream_(NULL)
+ ,in_a_stream_(NULL)
{}
FormatOut::~FormatOut()
@@ -275,52 +277,63 @@
return true;
}
- bool FormatOut::copyCodecFromIn(AVFormatContext* in){
-
- for(int i = 0; i < in->nb_streams; i++)
- { //鏍规嵁杈撳叆娴佸垱寤鸿緭鍑烘祦
- AVStream *in_stream = in->streams[i];
- AVStream *out_stream = avformat_new_stream(ctx_, in_stream->codec->codec);
- if(!out_stream)
- {
- logIt("Failed allocating output stream.\n");
- return false;
- }
-
- //灏嗚緭鍑烘祦鐨勭紪鐮佷俊鎭鍒跺埌杈撳叆娴�
- auto ret = avcodec_copy_context(out_stream->codec, in_stream->codec);
- if(ret<0)
- {
- logIt("Failed to copy context from input to output stream codec context\n");
- return false;
- }
-
- if (in_stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){
- v_idx_ = i;
- }else{
- a_idx_ = i;
- }
-
- out_stream->codecpar->codec_tag = out_stream->codec->codec_tag = 0;
-
- if(ctx_->oformat->flags & AVFMT_GLOBALHEADER)
- out_stream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
-
+ bool FormatOut::addStream(AVStream *s){
+ AVStream *in_stream = s;
+
+ AVStream *out_stream = avformat_new_stream(ctx_, in_stream->codec->codec);
+ if(!out_stream)
+ {
+ logIt("Failed allocating output stream.\n");
+ return false;
}
-
- in_ctx_ = in;
-
+ //灏嗚緭鍑烘祦鐨勭紪鐮佷俊鎭鍒跺埌杈撳叆娴�
+ auto ret = avcodec_parameters_copy(out_stream->codecpar, in_stream->codecpar);
+ if(ret<0)
+ {
+ logIt("Failed to copy context from input to output stream codec context\n");
+ return false;
+ }
+ out_stream->codecpar->codec_tag = 0;
+
+ if(ctx_->oformat->flags & AVFMT_GLOBALHEADER)
+ out_stream->codec->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
+
return true;
}
- bool FormatOut::JustWriter(AVFormatContext *in, const char *filename){
+ bool FormatOut::copyCodecFromIn(AVStream *v, AVStream *a){
+ if (v){
+ v_idx_ = 0;
+ in_v_stream_ = v;
+
+ if (!addStream(v)){
+ logIt("format out add video stream error");
+ return false;
+ }else{
+ logIt("copy video from instream");
+ }
+ }
+ if (a){
+ a_idx_ = 1;
+ in_a_stream_ = a;
+ if (!addStream(a)){
+ logIt("format out add audio stream error");
+ return false;
+ }else{
+ logIt("copy audio from instream");
+ }
+ }
+ return true;
+ }
+
+ bool FormatOut::JustWriter(AVStream *v, AVStream *a, const char *filename){
if(ctx_){
clear();
}
bool flag = open(NULL, format_name_.c_str());
- flag = copyCodecFromIn(in) && flag;
+ flag = copyCodecFromIn(v, a) && flag;
if(!flag){
logIt("FormatOut JustWriter error from in");
return false;
@@ -335,7 +348,6 @@
av_dict_set(&avdic,option_key,option_value,0);
flag = writeHeader(&avdic);
av_dict_free(&avdic);
-
}
return flag;
@@ -383,27 +395,51 @@
}
void FormatOut::adjustPTS(AVPacket *pkt, const int64_t &frame_cnt){
- if (pkt->stream_index >= ctx_->nb_streams){
- logIt("adjustPTS pkt stream index too much");
- return;
- }
-
AVStream *in_stream,*out_stream;
-
- in_stream = in_ctx_->streams[pkt->stream_index];
- out_stream = ctx_->streams[pkt->stream_index];
-
- // logIt("BEFORE stream %d, pts: %lld, dts: %lld, duration: %lld",
- // pkt->stream_index, pkt->pts, pkt->dts, pkt->duration);
+ int out_idx = -1;
+ std::vector<AVStream*> in_streams{in_v_stream_, in_a_stream_};
+ for (auto i : in_streams){
+ if (i && (i->index == pkt->stream_index)){
+ if (i->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){
+ out_idx = v_idx_;
+ in_stream = i;
+ break;
+ }else if (i->codecpar->codec_type == AVMEDIA_TYPE_AUDIO){
+ in_stream = i;
+ out_idx = a_idx_;
+ break;
+ }
+ }
+ }
+ if (out_idx == -1) return;
+ out_stream = ctx_->streams[out_idx];
+ pkt->stream_index = out_idx;
- //杞崲 PTS/DTS 鏃跺簭
- pkt->pts = av_rescale_q_rnd(pkt->pts,in_stream->time_base,out_stream->time_base,(enum AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
- pkt->dts = av_rescale_q_rnd(pkt->dts, in_stream->time_base, out_stream->time_base, (enum AVRounding)(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
- pkt->duration = av_rescale_q(pkt->duration, in_stream->time_base, out_stream->time_base);
- pkt->pos = -1;
+ int64_t time_stamp = frame_cnt;
- // logIt("AFTER stream %d, pts: %lld, dts: %lld, duration: %lld",
- // pkt->stream_index, pkt->pts, pkt->dts, pkt->duration);
+ if (out_idx == v_idx_){
+
+ pkt->pos = -1;
+ AVRational time_base = ctx_->streams[out_idx]->time_base;
+
+ AVRational time_base_q = { 1, AV_TIME_BASE };
+ int64_t calc_duration = (int64_t)(AV_TIME_BASE / fps_); //鍐呴儴鏃堕棿鎴�
+ pkt->pts = av_rescale_q(time_stamp*calc_duration, time_base_q, time_base);
+ pkt->dts = pkt->pts;
+ pkt->duration = av_rescale_q(calc_duration, time_base_q, time_base);
+
+ }else if (out_idx == a_idx_){
+
+ pkt->duration = 1024;
+ pkt->pts = pkt->dts = pkt->duration * time_stamp;
+
+ }
+ // logIt("BEFORE in stream timebase %d:%d, out timebase %d:%d,
+ // pts: %lld, dts: %lld, duration: %lld",
+ // in_stream->time_base.num, in_stream->time_base.den,
+ // out_stream->time_base.num, out_stream->time_base.den,
+ // pkt->pts, pkt->dts, pkt->duration);
+
}
bool FormatOut::writeFrame(AVPacket *pkt, const int64_t &frame_cnt,
--
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