使用ffmpeg拉取rtsp视频流，然后直接推送rtmp流，但出现了分段错误

Question

使用ffmpeg获取rtsp视频流。视频流的分辨率为2688*1520，帧率为25fps。最简单的流程是使用ffmpeg拉取rtsp视频流，然后直接推送rtmp流，但在推流过程中出现了流分割故障，代码如下：

    AVPacket packet;
    av_init_packet(&packet);
    int start_time = 0;
    start_time=av_gettime();
    int frame_index = 0;
    while(1){
            // AVPacket packet;

            AVStream* rtsp_stream;
            AVStream* rtmp_stream;
            ret_f = av_read_frame(av_fc_input, &packet);
            if (ret_f < 0)
            {
                    break;
            }
            INFO_LOG("av_read_frame to packet success");
            rtsp_stream = av_fc_input->streams[packet.stream_index];
            rtmp_stream = av_fc_output->streams[packet.stream_index];

            if(rtsp_stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO){
                    AVRational time_base = rtsp_stream->time_base;
                    AVRational time_base_q = AV_TIME_BASE_Q;
                    int64_t pts_time = av_rescale_q(packet.dts, time_base, time_base_q);
                    int64_t now_time = av_gettime() - start_time;
                    if(pts_time > now_time)
                            av_usleep(pts_time - now_time);
            }
            INFO_LOG("get input and output");

            packet.pts = av_rescale_q_rnd(packet.pts, rtsp_stream->time_base, rtmp_stream->time_base, AVRounding(AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX));
            packet.dts = av_rescale_q_rnd(packet.dts, rtsp_stream->time_base, rtmp_stream->time_base, AVRounding(AV_ROUND_NEAR_INF |AV_ROUND_PASS_MINMAX));
            packet.duration = av_rescale_q(packet.duration, rtsp_stream->time_base, rtmp_stream->time_base);

            packet.pos = -1;

            INFO_LOG("packet parameter edit success");
            if(packet.stream_index == video_stream){
                    ERROR_LOG("Send %d video frames to out URL", frame_index);
                    ++frame_index;
            }

            INFO_LOG("frame index ++ success");

            ret_f = av_interleaved_write_frame(av_fc_output, &packet);
            if (ret_f < 0)
            {
                    ERROR_LOG("Error muxing packers");
                    break;
            }

            INFO_LOG("write packet to av_fc_output success");

            av_packet_unref(&packet);
            // usleep(40*1000);
    }

为什么会发生段故障？是不是分辨率太大了？有什么解决方案吗？调整图像大小？谢谢!

Answer 1

另外，当我使用摄像头的子流时，这个问题不会发生。子流对应的分辨率为704*576，帧率为25fps。