GB28181: 推流h264, 用vlc播放RTMP卡顿花屏(由于startcode=0x000001) #2209

[winlinvip]

描述(Description) 28181推流h264到SRS/develop, 用vlc播放RTMP卡顿花屏(由于NALU startcode=0x00 00 01 3Bytes)

1. SRS版本(Version): 4.0release和develop分支

重现Bug的步骤(How to replay bug?) ffmpeg编码输出的h264帧，sps与pps的startcode=0x000001(3Bytes)，而非startcode=0x00000001(4Bytes) 将导致h264转flv时，sps/pps不完整，VLC播放卡花

期望行为(Expect)

         if (video_data[index] == 0x00 && video_data[index+1] == 0x00 &&
-             video_data[index+2] == 0x00 && video_data[index+3] == 0x01){
-                 list_index.push_back(index);
-             }
+             video_data[index+2] == 0x00 && video_data[index+3] == 0x01) {
+                index_node.pos = index;
+                index_node.len = 4;
+                list_index.push_back(index_node);
+         }
+
+        if (video_data[index] == 0x00 && video_data[index+1] == 0x00 &&
+             video_data[index+2] == 0x01) {
+                index_node.pos = index;
+                index_node.len = 3;
+                list_index.push_back(index_node);
+         }
     }

         //0001xxxxxxxxxx
         //xxxx0001xxxxxxx
-        uint32_t naluLen = size - cur_pos - 4;
+        uint32_t naluLen = size - index_node.pos - index_node.len;

-        char *frame = video_data + cur_pos + 4;
+        char *frame = video_data + index_node.pos + index_node.len;
         int frame_size = naluLen;