第一个切片（xxxx-0.ts)高概率缺编码信息

[lystormenvoy]

2024/03/19 14:36:51 [error] 25#25: *14905 AVALog rtmp: gen_pmt| 000 video codec is (0), client: 192.168.4.164, server: 0.0.0.0:1935, session: 000000000401A8D0, stream: default/hls/ava_4028a4998dd56978018df8bdc3bb13c0_TP
2024/03/19 14:36:51 [error] 25#25: *14905 AVALog rtmp: gen_pmt| vpid = -1 (-1), client: 192.168.4.164, server: 0.0.0.0:1935, session: 000000000401A8D0, stream: default/hls/ava_4028a4998dd56978018df8bdc3bb13c0_TP

有时会是无法识别audio codec

对应代码是

if (vcodec == 0) {
        // ignore
    } else if (vcodec ==  NGX_RTMP_VIDEO_H264) {
        vpid = NGX_RTMP_MPEGTS_PID_H264;
    } else if (vcodec == NGX_RTMP_HEVC_CODEC_ID) {
        vpid = NGX_RTMP_MPEGTS_PID_H265;
    } else if (log) {
        ngx_log_error(NGX_LOG_ERR, log, 0,
            "rtmp: gen_pmt| unknown video codec (%d)", vcodec);
    }

    switch (acodec) {
        case 0: //ignore
        break;

        case NGX_RTMP_AUDIO_MP3:
            apid = NGX_RTMP_MPEGTS_PID_MP3;
        break;

        case NGX_RTMP_AUDIO_AAC:
            apid = NGX_RTMP_MPEGTS_PID_AAC;
        break;

        default:
            if (log) {
                ngx_log_error(NGX_LOG_ERR, log, 0,
                    "rtmp: gen_pmt| unknown video codec (%d)", vcodec);
            }
    }

这里vcodec和acodec会=0，所以生产的切片pmt里缺少音频或视频层pid信息，导致播放异常

目前解决方案是先写死（因为都是h264+aac），不知道为什么acodec和vcodec会是0