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• Use Video stream from Wifi device as input to stream over 4G

  1er mars 2017, par pbdev

  I’m building an Android app that streams video from a Wifi device to a Wowza server. It should be quite simple but I can’t figure out how to use both Wifi and 4G at the same time. The device I’m using is a Samsung S5 with Android 6.0.1. To sum it up, this is the goal :

  1. Fetch the video stream from a GoPro device over Wifi.
  2. Send the video stream to a Wowza server over 4G.

  When connected to the GoPro’s Wifi network I can ping the GoPro and see the stream in a MediaPlayer. Since I’m connected to a Wifi device that doesn’t provide internet access, I can’t ping my Wowza server. Once I’ve disabled Wifi this is no problem, by using FFmpeg I can reach the Wowza server over 4G.

  This is the FFmpeg command I want to use to copy the stream to the Wowza server, where 10.5.5.9 is the IP-address of the GoPro :

  ffmpeg -i http://10.5.5.9:8080/live/amba.m3u8 -acodec aac -ar 44100 -ab 48k -vcodec copy -f flv rtmp://username:password@my-wowza-server.com:1935/my-app/my-stream

  If I enable Wifi and connect to the GoPro, 10.5.5.9 is reachable but my-wowza-server.com isn’t. The Samsung S5 provides a Smart network switch which makes the Wowza server reachable but the connection to the GoPro gets lost.

  Is there any way to bind 10.5.5.9 to the Wifi interface of the phone and bind my-wowza-server.com to the cellular interface ?

• How to ensure that ffmpeg libraries uses/ not uses GPU

  31 mai 2021, par zimopisec

  My library ( Linux, Debian) uses FFMpeg libraries ( avformat, avcodec, swscale etc) for reading video stream from network cameras. Actually, I need to capture each video frame from network camera, decode it, scale and store in memory- and other thread pass this data to calling program for display.

  


  Problem is, that all works in CPU and take a huge amount of CPU resource. How can I enforce usage of GPU accelerator for processing ?

  


  I have video card : VGA compatible controller : Intel Corporation HD Graphics 620 (rev 02)

  


  My decode thread look like this ( I omit declarations, error handling etc, so pls don't look for grammar mistakes :)))

  


  fmt = avformat_alloc_context(); 
//initialising, setting option by av_dict_set
// finding video stream index
***
 // finding decoder and allocate its contexts

    frame = av_frame_alloc();

    while ( av_read_frame(ctx->fmt, &pkt) >= 0) 
    {
        AVPacket orig_pkt = pkt;

         avcodec_send_packet(ctx->dec_ctx, pkt);
         avcodec_receive_frame(ctx->dec_ctx, frame);
            *** 
// get buffer allocated for store of frame data
             buff = get_free_buffer(ctx);
        sws_scale(ctx->sws, (const uint8_t * const*)frame->data, 
        frame->linesize, 0, ctx->dec_ctx->height, buff->data,
        buff->linesize);
            ret = decode_packet(ctx, frame, &pkt, &got_frame);
            if (ret < 0)
                break;
            pkt.data += ret;
            pkt.size -= ret;
        }
        while (pkt.size > 0);

        av_packet_unref(&orig_pkt);
    }
*****  


  


• Use HLS from Wifi device as input to stream over 4G

  26 février 2017, par pbdev

  I’m building an Android app that streams video from a Wifi device to a Wowza server. It should be quite simple but I can’t figure out how to use both Wifi and 4G at the same time. The device I’m using is a Samsung S5 with Android 6.0.1. To sum it up, this is the goal :

  1. Fetch the video stream from a GoPro device over Wifi.
  2. Send the video stream to a Wowza server over 4G.

  When connected to the GoPro’s Wifi network I can ping the GoPro and see the stream in a MediaPlayer. Since I’m connected to a Wifi device that doesn’t provide internet access, I can’t ping my Wowza server. Once I’ve disabled Wifi this is no problem, by using FFmpeg I can reach the Wowza server over 4G.

  This is the FFmpeg command I want to use to copy the stream to the Wowza server, where 10.5.5.9 is the IP-address of the GoPro :

  ffmpeg -i http://10.5.5.9:8080/live/amba.m3u8 -acodec aac -ar 44100 -ab 48k -vcodec copy -f flv rtmp://username:password@my-wowza-server.com:1935/my-app/my-stream

  If I enable Wifi and connect to the GoPro, 10.5.5.9 is reachable but my-wowza-server.com isn’t. The Samsung S5 provides a Smart network switch which makes the Wowza server reachable but the connection to the GoPro gets lost.

  Is there any way to bind 10.5.5.9 to the Wifi interface of the phone and bind my-wowza-server.com to the cellular interface ?