bmf::builder::Node::AddCallback设置回调之后RealNode::NodeMetaInfo::Dump的时候抛出异常cannot use operator[] with a numeric argument with

[zhzhjr]

cannot use operator[] with a numeric argument with
1、RealNode::NodeMetaInfo::Dump()中使用数值类型作为json的key抛出异常
另外还有个问题：
2、RealNode::NodeMetaInfo::Dump()的时候和NodeMetaInfo::to_json()里面callback_binding字段名不一致格式也不一致

[zhzhjr]

[sfeiwong]

方便提供一下复现步骤吗

[zhzhjr]

dump_graph:1构造graph->创建解码器->创建编码器->任意一个node AddCallback->run 代码如下：
nlohmann::json graph_para = {{"dump_graph", 1}};
auto graph = bmf::builder::Graph(bmf::builder::NormalMode,
bmf_sdk::JsonParam(graph_para));

nlohmann::json decode_para = {
    {"input_path", "../../files/big_bunny_10s_30fps.mp4"}};
auto video = graph.Decode(bmf_sdk::JsonParam(decode_para));

nlohmann::json encode_para = {{"output_path", output_file},
                              {"video_params",
                               {{"codec", "h264"},
                                {"width", 320},
                                {"height", 240},
                                {"crf", 23},
                                {"preset", "veryfast"}}},
                              {"audio_params",
                               {{"codec", "aac"},
                                {"bit_rate", 128000},
                                {"sample_rate", 44100},
                                {"channels", 2}}}};

auto node = graph.Encode(video["video"], video["audio"],
             bmf_sdk::JsonParam(encode_para));
node.AddCallback(0, bmf::BMFCallback([](bmf_sdk::CBytes data)-> bmf_sdk::CBytes {
    std::string strInfo;
    strInfo.assign(reinterpret_cast<const char*>(data.buffer), data.size);
    return data; }));

graph.Run();

[sfeiwong]

dump_graph:1构造graph->创建解码器->创建编码器->任意一个node AddCallback->run 代码如下： nlohmann::json graph_para = {{"dump_graph", 1}}; auto graph = bmf::builder::Graph(bmf::builder::NormalMode, bmf_sdk::JsonParam(graph_para));

nlohmann::json decode_para = {
    {"input_path", "../../files/big_bunny_10s_30fps.mp4"}};
auto video = graph.Decode(bmf_sdk::JsonParam(decode_para));

nlohmann::json encode_para = {{"output_path", output_file},
                              {"video_params",
                               {{"codec", "h264"},
                                {"width", 320},
                                {"height", 240},
                                {"crf", 23},
                                {"preset", "veryfast"}}},
                              {"audio_params",
                               {{"codec", "aac"},
                                {"bit_rate", 128000},
                                {"sample_rate", 44100},
                                {"channels", 2}}}};

auto node = graph.Encode(video["video"], video["audio"],
             bmf_sdk::JsonParam(encode_para));
node.AddCallback(0, bmf::BMFCallback([](bmf_sdk::CBytes data)-> bmf_sdk::CBytes {
    std::string strInfo;
    strInfo.assign(reinterpret_cast<const char*>(data.buffer), data.size);
    return data; }));

graph.Run();

看起来应是个bug或不完善的点，我们继续验证fix一下

[JackLau1222]

dump_graph:1构造graph->创建解码器->创建编码器->任意一个node AddCallback->run 代码如下： nlohmann::json graph_para = {{"dump_graph", 1}}; auto graph = bmf::builder::Graph(bmf::builder::NormalMode, bmf_sdk::JsonParam(graph_para));

nlohmann::json decode_para = {
    {"input_path", "../../files/big_bunny_10s_30fps.mp4"}};
auto video = graph.Decode(bmf_sdk::JsonParam(decode_para));

nlohmann::json encode_para = {{"output_path", output_file},
                              {"video_params",
                               {{"codec", "h264"},
                                {"width", 320},
                                {"height", 240},
                                {"crf", 23},
                                {"preset", "veryfast"}}},
                              {"audio_params",
                               {{"codec", "aac"},
                                {"bit_rate", 128000},
                                {"sample_rate", 44100},
                                {"channels", 2}}}};

auto node = graph.Encode(video["video"], video["audio"],
             bmf_sdk::JsonParam(encode_para));
node.AddCallback(0, bmf::BMFCallback([](bmf_sdk::CBytes data)-> bmf_sdk::CBytes {
    std::string strInfo;
    strInfo.assign(reinterpret_cast<const char*>(data.buffer), data.size);
    return data; }));

graph.Run();

@zhzhjr #171 在这个patch里 我们解决了这个问题 可以试一试