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• Using ffserver to do UDP multicast streaming

  20 novembre 2015, par Catherine MacInnes

  Here’s the deal. I’m working with IPTV hardware and I need to output a bunch of demo streams. These are MPEG2 transport stream that need to be straight up UDP Multicast streams. I have an ffmpeg command that works great :

  ffmpeg -re -i /Volumes/Data/DemoVideos/GRAILrpsp.ts -acodec copy -vcodec copy -f mpegts udp://239.192.1.82:12000[ttl=1,buffer_size=2097157]

  What I would like to do is convert this into an ffserver config file instead of having to start a whole bunch of ffmpeg streams and then figuring out how to get them to loop. I’m sure I can do it with the right scripting but what a pain, isn’t that what ffserver is for ? But I can’t find any documentation on doing UDP streaming using ffserver. You can set a multicast address and port but it goes to RTP which this hardware isn’t designed for. Any help would be greatly appreciated.

• fluent-ffmpeg throw er when concatenate videos

  2 mai 2020, par Romualdo Arrechea Hernández

  I'm using fluent-ffmpeg version 2.1.2.
When I execute the current code the output show off a error message :

  



  var ffmpeg = require('fluent-ffmpeg');
var glob= require('glob');
ffmpeg.setFfmpegPath("/usr/bin/ffmpeg");
ffmpeg.setFfprobePath("/usr/bin/ffprobe");
var command = ffmpeg();

const path='/home/username/somefolder/*/output.mp4';

var videos=glob.sync(path);
var output="./output.mp4";
videos.map(video=>command.addInput(video));
command.mergeToFile(output);


  



  the console output>

  



  **events.js:287&#xA;      throw er; // Unhandled &#x27;error&#x27; event&#xA;      ^&#xA;&#xA;Error: ffmpeg exited with code 1: Conversion failed!&#xA;&#xA;    at ChildProcess.<anonymous> (/home/r/Projects/prueba/node_modules/fluent-ffmpeg/lib/processor.js:182:22)&#xA;    at ChildProcess.emit (events.js:310:20)&#xA;    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)&#xA;Emitted &#x27;error&#x27; event on FfmpegCommand instance at:&#xA;    at emitEnd (/home/r/Projects/prueba/node_modules/fluent-ffmpeg/lib/processor.js:424:16)&#xA;    at endCB (/home/r/Projects/prueba/node_modules/fluent-ffmpeg/lib/processor.js:544:13)&#xA;    at handleExit (/home/r/Projects/prueba/node_modules/fluent-ffmpeg/lib/processor.js:170:11)&#xA;    at ChildProcess.<anonymous> (/home/r/Projects/prueba/node_modules/fluent-ffmpeg/lib/processor.js:182:11)&#xA;    at ChildProcess.emit (events.js:310:20)&#xA;    at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)**&#xA;</anonymous></anonymous>

  



  The video should be created, but it's unable to concat. Some clue ?

  


• failed to create HWDeviceContext for h264 and Videotoolbox using FFmpeg for iOS

  21 février 2024, par Jabed Dhali

  I am attempting to decode an h264 video using hardware accelaration in FFmpeg, specially for iOS devices and utilizing VideoToolbox hardware device. While I have successfully generated decoder context, but encountering difficulties in creating hardware device context and setting buffer reference. I am new with ffmpeg and seeking assistance in resolving the issue. The relevant code snippet is here :

  


  class Decoder_Setup {
private:
    AVCodecContext *decoder_ctx = NULL;
    const AVCodec *decoder = NULL;
    enum AVHWDeviceType type;
    AVBufferRef *buffer_ref = NULL;
    AVPixelFormat pix_fmt;
    AVCodecHWConfig *hwConfig = NULL;
    
public:
    int set();
};

int Decoder_Setup::set() {
    type = AV_HWDEVICE_TYPE_VIDEOTOOLBOX;
    pix_fmt = AV_PIX_FMT_VIDEOTOOLBOX;
    decoder = avcodec_find_decoder_by_name("h264");
    decoder_ctx = avcodec_alloc_context3(decoder);
    
    int res = av_hwdevice_ctx_create(&buffer_ref, type, NULL, NULL, 0);
    decoder_ctx->hw_device_ctx = buffer_ref;
//    decoder_ctx->get_format = (AVPixelFormat (*)(AVCodecContext *, const AVPixelFormat *)) AV_PIX_FMT_VIDEOTOOLBOX;
    avcodec_open2(decoder_ctx, decoder, NULL);
    return res;
}


  


  Thank you in advance for your assistance !