• 参考下面两篇blog ,终于在ubuntu20.10上实现了 ffplay 拉flv流的功能,感谢博主。

https://blog.csdn.net/smallhujiu/article/details/81703434

https://www.pianshen.com/article/26551860041/

  •  实现的diff文件

diff --git a/libavformat/flv.h b/libavformat/flv.h

index 3571b90279..e790c44d74 100644
--- a/libavformat/flv.h
+++ b/libavformat/flv.h
@@ -110,6 +110,8 @@ enum {
     FLV_CODECID_H264    = 7,
     FLV_CODECID_REALH263= 8,
     FLV_CODECID_MPEG4   = 9,
+    FLV_CODECID_HEVC   = 12,
+    //增加一个类型12,rtmp协议不支持HEVC,所以需要自己添加一个解码ID,国内普遍使用12作为HEVC的ID
 };
 
 enum {
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index ad6e7a3ca5..8a161bd477 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -36,6 +36,7 @@
 #include "internal.h"
 #include "avio_internal.h"
 #include "flv.h"
+#include "hevc.h"
 
 #define VALIDATE_INDEX_TS_THRESH 2500
 
@@ -318,6 +319,8 @@ static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
         return vpar->codec_id == AV_CODEC_ID_VP6A;
     case FLV_CODECID_H264:
         return vpar->codec_id == AV_CODEC_ID_H264;
+    case FLV_CODECID_HEVC:
+        return vpar->codec_id == AV_CODEC_ID_HEVC;
     default:
         return vpar->codec_tag == flv_codecid;
     }
@@ -367,6 +370,11 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream,
         par->codec_id = AV_CODEC_ID_MPEG4;
         ret = 3;
         break;
+    case FLV_CODECID_HEVC:
+        par->codec_id = AV_CODEC_ID_HEVC;
+        vstream->need_parsing = AVSTREAM_PARSE_HEADERS;
+        ret = 3;     // not 4, reading packet type will consume one byte
+        break;
     default:
         avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
         par->codec_tag = flv_codecid;
@@ -1219,7 +1227,8 @@ retry_duration:
 
     if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
         st->codecpar->codec_id == AV_CODEC_ID_H264 ||
-        st->codecpar->codec_id == AV_CODEC_ID_MPEG4) {
+        st->codecpar->codec_id == AV_CODEC_ID_HEVC ||
+        st->codecpar->codec_id == AV_CODEC_ID_MPEG4 ) {
         int type = avio_r8(s->pb);
         size--;
 
@@ -1228,7 +1237,8 @@ retry_duration:
             goto leave;
         }
 
-        if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4) {
+        if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4 ||
+                st->codecpar->codec_id == AV_CODEC_ID_HEVC)  {
             // sign extension
             int32_t cts = (avio_rb24(s->pb) + 0xff800000) ^ 0xff800000;
             pts = dts + cts;
@@ -1244,7 +1254,7 @@ retry_duration:
             }
         }
         if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
-            st->codecpar->codec_id == AV_CODEC_ID_H264)) {
+            st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_HEVC)) {
             AVDictionaryEntry *t;
 
             if (st->codecpar->extradata) {
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 1cfcdc6392..d6babd8833 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -34,6 +34,7 @@
 #include "libavutil/opt.h"
 #include "libavcodec/put_bits.h"
 #include "libavcodec/aacenctab.h"
+#include "hevc.h"
 
 
 static const AVCodecTag flv_video_codec_ids[] = {
@@ -46,6 +47,7 @@ static const AVCodecTag flv_video_codec_ids[] = {
     { AV_CODEC_ID_VP6,      FLV_CODECID_VP6 },
     { AV_CODEC_ID_VP6A,     FLV_CODECID_VP6A },
     { AV_CODEC_ID_H264,     FLV_CODECID_H264 },
+    { AV_CODEC_ID_HEVC,     FLV_CODECID_HEVC },
     { AV_CODEC_ID_NONE,     0 }
 };
 
@@ -491,7 +493,7 @@ static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par, i
     FLVContext *flv = s->priv_data;
 
     if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
-            || par->codec_id == AV_CODEC_ID_MPEG4) {
+            || par->codec_id == AV_CODEC_ID_MPEG4 || par->codec_id == AV_CODEC_ID_HEVC) {
         int64_t pos;
         avio_w8(pb,
                 par->codec_type == AVMEDIA_TYPE_VIDEO ?
@@ -537,7 +539,12 @@ static void flv_write_codec_header(AVFormatContext* s, AVCodecParameters* par, i
             avio_w8(pb, par->codec_tag | FLV_FRAME_KEY); // flags
             avio_w8(pb, 0); // AVC sequence header
             avio_wb24(pb, 0); // composition time
-            ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
+            //ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
+            if (par->codec_id == AV_CODEC_ID_HEVC) {
+                ff_isom_write_hvcc(pb, par->extradata, par->extradata_size, 0);
+            } else {
+                ff_isom_write_avcc(pb, par->extradata, par->extradata_size);
+            }
         }
         data_size = avio_tell(pb) - pos;
         avio_seek(pb, -data_size - 10, SEEK_CUR);
@@ -844,7 +851,7 @@ end:
             AVCodecParameters *par = s->streams[i]->codecpar;
             FLVStreamContext *sc = s->streams[i]->priv_data;
             if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
-                    (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4))
+                    (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4 || par->codec_id == AV_CODEC_ID_HEVC))
                 put_avc_eos_tag(pb, sc->last_ts);
         }
     }
@@ -893,22 +900,38 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
     }
 
     if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
-        par->codec_id == AV_CODEC_ID_VP6  || par->codec_id == AV_CODEC_ID_AAC)
+        par->codec_id == AV_CODEC_ID_VP6  || par->codec_id == AV_CODEC_ID_AAC) {
         flags_size = 2;
-    else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4)
+    } else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4 ||
+            par->codec_id ==AV_CODEC_ID_HEVC ) {
         flags_size = 5;
-    else
+    } else {
         flags_size = 1;
+    }
 
     if (par->codec_id == AV_CODEC_ID_AAC || par->codec_id == AV_CODEC_ID_H264
-            || par->codec_id == AV_CODEC_ID_MPEG4) {
-        int side_size;
+            || par->codec_id == AV_CODEC_ID_MPEG4 || par->codec_id == AV_CODEC_ID_HEVC) {
+        int side_size = 0;
         uint8_t *side = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_size);
+        //if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
+        //      ret = ff_alloc_extradata(par, side_size);
+        //      if (ret < 0)
+        //          return ret;
+        //      memcpy(par->extradata, side, side_size);
+        //     flv_write_codec_header(s, par, pkt->dts);
+        //}
+
         if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
-            ret = ff_alloc_extradata(par, side_size);
-            if (ret < 0)
-                return ret;
+            av_free(par->extradata);
+            par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE);
+            if (!par->extradata) {
+                par->extradata_size = 0;
+                return AVERROR(ENOMEM);
+            }
             memcpy(par->extradata, side, side_size);
+            par->extradata_size = side_size;
+            flv_write_codec_header(s, par, pkt->dts);
+        } else {
             flv_write_codec_header(s, par, pkt->dts);
         }
     }
@@ -966,8 +989,12 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
         if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
             if ((ret = ff_avc_parse_nal_units_buf(pkt->data, &data, &size)) < 0)
                 return ret;
+    } else if (par->codec_id == AV_CODEC_ID_HEVC) {
+        if (par->extradata_size > 0 && *(uint8_t*)par->extradata != 1)
+            if ((ret = ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL)) < 0)
+                return ret;
     } else if (par->codec_id == AV_CODEC_ID_AAC && pkt->size > 2 &&
-               (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
+            (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) {
         if (!s->streams[pkt->stream_index]->nb_frames) {
             av_log(s, AV_LOG_ERROR, "Malformed AAC bitstream detected: "
                    "use the audio bitstream filter 'aac_adtstoasc' to fix it "
@@ -1036,9 +1063,9 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
             else
                 avio_w8(pb, ((FFALIGN(par->width,  16) - par->width) << 4) |
                              (FFALIGN(par->height, 16) - par->height));
-        } else if (par->codec_id == AV_CODEC_ID_AAC)
+        } else if (par->codec_id == AV_CODEC_ID_AAC) {
             avio_w8(pb, 1); // AAC raw
-        else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4) {
+        } else if (par->codec_id == AV_CODEC_ID_H264 || par->codec_id == AV_CODEC_ID_MPEG4 || par->codec_id == AV_CODEC_ID_HEVC) {
             avio_w8(pb, 1); // AVC NALU
             avio_wb24(pb, pkt->pts - pkt->dts);
         }

  • 编译脚本

./configure --prefix=/usr/local/ffmpeg  --enable-shared --disable-static --enable-ffplay --enable-sdl --enable-pic --enable-gpl --enable-version3 --enable-nonfree --enable-libx264  --enable-libx265 --enable-libmp3lame --enable-libfdk_aac --disable-doc

  • 需要注意

ldd 看看 ffplay 的动态链接库,使得链接到/usr/local/ffmpeg/lib 目录下的库文件。

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