上云APi推流卡顿

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金尧

无人机型号是Matrice 350 RTK，使用上云api推流rtmp到阿里云，用ffmpeg检测有报错的帧，目前的排查来看，源流推流推了大量某数据包中没有真正数据NAL（i/p/b帧），好像是SEI，这是正常现象吗？
目前我这边的问题是将推上来的rtmp流转为webrtc后，PC端浏览器能正常播放，移动端浏览器卡得像幻灯片，不确定是不是这些SEI导致的

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18 comments

Date Votes
  • 金尧

    用ffmpeg -i 'rtmp://xxx'会报以下错误

    [h264 @ 0x7fc471809c00] missing picture in access unit with size 242 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 242 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 189 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 242 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246

    像是推流过程中某些NAL丢失了图像帧

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  • 金尧

    网络应该没有问题，pilot和我本地电脑用的都是wifi，本地电脑用OBS推同样码率和分辨率的视频流没有出现这些报错

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  • DJI Developer Support
    请问目前使用的用的ffmpeg、遥控器和无人机的版本都是多少呢
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  • 金尧

    ffmpeg是4.4

    pilot是7.1.0.24

    无人机固件版本是08.75.02.17

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  • DJI Developer Support
    350rtk确认是这个版本吗？
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  • 金尧

    不好意思，是Mavic 3E，写错了，固件版本是08.75.02.17

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  • DJI Developer Support
    3E好像也没有这个版本啊，可以截图看看吗
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  • 金尧

    不好意思，我让飞手重新拍了下照片，是这个版本号，之前我看的mqtt发上来的firmware_version，看岔了，看成电池的固件版本了。。。

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  • DJI Developer Support
    webrtc对网络要求会高一点， 本地电脑用OBS推同样码率和分辨率的视频流时，移动端拉流会卡顿吗？
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  • 金尧

    不论是将rtmp转为webrtc，还是hls，移动端都卡顿，移动端直接用的chrome或者safari播放的hls，pc端浏览器播放没有任何问题

    但是用obs推同样码率和分辨率的视频流，移动端用浏览器就不会卡

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  • DJI Developer Support
    目前如果不转webrtc或者hls，直接播放rtmp格式会卡顿吗？
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  • 金尧

    移动端由于浏览器不能直接播放rtmp，用的移动端的vlc播放的，vlc不论是播放rtmp还是hls都不卡顿（移动端浏览器hls卡顿），查了下资料，可能是pc端浏览器和vlc对于视频的容错率高，移动端浏览器的容错率低，应该还是推流侧的码流有些问题

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  • DJI Developer Support
    这样的话只能拉日志进行分析了。
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  • 周新皓 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 242 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 242 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 189 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 242 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 192 
    [h264 @ 0x7fc471809c00] missing picture in access unit with size 246

    哥，这个问题当时怎么解决的？

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  • 刘先生

    类似问题：

    场景：MSDK 用直播推流 rtmp 到阿里云， 使用阿里云的 artc 播放。

    原来 SDK 5.8.0 是正常流畅的，但是升级到 SDK 5.9.1 之后会非常卡顿。

    能否说一下升级修改了什么？是否增加了B帧导致，能否增加参数配置？

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  • 3052103

    类似问题：遥控器通过rtmp推流到SRS, web通过webrtc拉流。

    App 10.1.0.30
    飞机版本 10.01.0014
    遥控器 05.02.1106
    云台 01.00.21.24
    M30负载 10.00.89.14
    试了市面上5款不同厂家的无人机。大疆的M30，webrtc会出现丢帧、卡顿。web用flv不会。不知是做了啥

     

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  • jxdnsong

    类似问题：机场通过rtmp推流到zml, web通过webrtc拉流。

    之前都不会，你们最近更新了啥，流肯定是正常的，通过vlc去播rtmp很流畅，只要web通过webrtc去博就卡的要死

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  • jxdnsong

    是不是加了b帧？

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