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• Can I use a config file within an embedded youtube-dl code ?

  10 mai 2017, par Stack Johan

  Right now, I’m having issues with ffmpeg not being recognized. I have the ffmpeg files stored in a folder, and I normally call ffmpeg using —ffmpeg-location.

  I don’t know how to do that within Python code, and I would prefer to use config files to call all the options.

  This is what I have right now :

  from __future__ import unicode_literals
  
  import youtube_dl
  
  
  
  
  
   ydl_opts = {
  
      'format': 'bestaudio/best',
  
      'outtmpl': u'%(id)s.%(ext)s',
  
      'postprocessors': [{
  
      'key': 'FFmpegExtractAudio',
  
      'preferredcodec': 'mp3',
  
      'preferredquality': '192',
  
  }]
  
  }
  
  with youtube_dl.YoutubeDL(ydl_opts) as ydl:
  
  ydl.download(['https://youtu.be/Y_n0UwQMz5o'])

• FFMPEG : Youtube streaming issues

  23 février 2019, par Alex Paramonov

  I am trying to make a reliable stream from my Icecast/Shoutcast servers to Youtube live.
  The command that I use is :

  /usr/bin/ffmpeg -re -loop 1 -framerate 1 -i /var/users/youtube_stream/DJ-philadelphia_jO46wsH.jpg -i http://127.0.0.1:4700/radio -c:v libx264 -preset ultrafast -maxrate 2048k -bufsize 2048k -c:a copy -ab 128k -s 1920x1080 -rtmp_live live -f flv rtmp://a.rtmp.youtube.com/live2/k123 -nostats

  The stream starts running but suddenly stops at random times with the output similar to this :

  av_interleaved_write_frame(): Broken pipe
  
  [flv @ 0x5641e04db260] Failed to update header with correct duration.
  
  [flv @ 0x5641e04db260] Failed to update header with correct filesize.
  
  Error writing trailer of rtmp://a.rtmp.youtube.com/live2/123: Broken pipe
  
  frame= 4771 fps=1.0 q=2.0 Lsize=  106465kB time=01:19:30.00 bitrate= 182.8kbits/s speed=   1x
  
  video:29022kB audio:74516kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.825971%
  
  Conversion failed!
  
  99%
  
  Exiting normally, received signal 15.

  I can’t say exactly why is this happening and maybe there is a way to fix it, but to mee it looks like ffmpeg can not send or convert some frame and it breaks the entire process, so I started digging the docs and found a fifo format that has reconnection options in case of failure.
  So my new command is :

  /usr/bin/ffmpeg -re -loop 1 -framerate 1 -i /var/users/youtube_stream/DJ-philadelphia_jO46wsH.jpg -i http://127.0.0.1:4700/radio -c:v libx264 -preset ultrafast -maxrate 2048k -bufsize 2048k -c:a copy -ab 128k -s 1920x1080 -rtmp_live live -f fifo -fifo_format flv -map 0:v -map 1:a -drop_pkts_on_overflow 1 -attempt_recovery 1 -recovery_wait_time 1 rtmp://a.rtmp.youtube.com/live2/123 -nostats

  With this command Youtube starts complaining about video resolution saying that 65535x65535 is not supported, value 65535 looks like something is not initialized properly. Please note that I have explicitly set the resolution with -s 1920x1080.

  The output from FLV and FIFO formats looks quite similar.

  FLV

  Input #0, image2, from '/var/users/youtube_stream/DJ-philadelphia_jO46wsH.jpg':
  
    Duration: 00:00:01.00, start: 0.000000, bitrate: 597 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 1 fps, 1 tbr, 1 tbn, 1 tbc
  
  Input #1, mp3, from 'http://127.0.0.1:4700/radio':
  
    Metadata:
  
      icy-br          : 128
  
      icy-description : test
  
      icy-genre       : test
  
      icy-name        : Test
  
      icy-pub         : 1
  
      StreamTitle     : silence
  
    Duration: N/A, start: 0.000000, bitrate: 128 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x563bdde386a0] using SAR=1/1
  
  [libx264 @ 0x563bdde386a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x563bdde386a0] profile Constrained Baseline, level 4.0
  
  [libx264 @ 0x563bdde386a0] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=1 scenecut=0 intra_refresh=0 rc_lookahead=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=2048 vbv_bufsize=2048 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=0
  
  Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/k478-1xpz-v2de-5e79':
  
    Metadata:
  
      encoder         : Lavf57.83.100
  
      Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuvj420p(pc), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 1 fps, 1k tbn, 1 tbc
  
      Metadata:
  
        encoder         : Lavc57.107.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 2048000/0/0 buffer size: 2048000 vbv_delay: -1
  
      Stream #0:1: Audio: mp3 ([2][0][0][0] / 0x0002), 44100 Hz, stereo, s16p, 128 kb/s

  FIFO

  Input #0, image2, from '/var/users/youtube_stream/DJ-philadelphia_jO46wsH.jpg':
  
    Duration: 00:00:01.00, start: 0.000000, bitrate: 597 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 1 fps, 1 tbr, 1 tbn, 1 tbc
  
  Input #1, mp3, from 'http://127.0.0.1:4700/radio':
  
    Metadata:
  
      icy-br          : 128
  
      icy-description : test
  
      icy-genre       : test
  
      icy-name        : Test
  
      icy-pub         : 1
  
      StreamTitle     : silence
  
    Duration: N/A, start: 0.000000, bitrate: 128 kb/s
  
      Stream #1:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
    Stream #1:0 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x560fb2209ae0] using SAR=1/1
  
  [libx264 @ 0x560fb2209ae0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x560fb2209ae0] profile Constrained Baseline, level 4.0
  
  Output #0, fifo, to 'rtmp://a.rtmp.youtube.com/live2/k478-1xpz-v2de-5e79':
  
    Metadata:
  
      encoder         : Lavf57.83.100
  
      Stream #0:0: Video: h264 (libx264), yuvj420p(pc), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 1 fps, 1 tbn, 1 tbc
  
      Metadata:
  
        encoder         : Lavc57.107.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 2048000/0/0 buffer size: 2048000 vbv_delay: -1
  
      Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s

  you can see the input streams, output, mapping - all fine except one line that is missing with fifo format :

  [libx264 @ 0x563bdde386a0] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html ...

  Seems like video codec is not completely initialized and does not start with when using fifo format.

  So my questions are :

  1. is there a way to create a reliable stream with ffmpeg w/o using
     fifo format ?
  2. if fifo format is mandatory in this case, what’s wrong with my
     video codec ?

• Is it possible to establish youtube live stream with ffmgep from Android if video encoded on another device

  20 mai 2015, par Nick Kleban

  I have "Android Device" and some other "Device with camera". This device captures video, encodes it (h264) and sends it to my phone through UDP. On phone i’m receiving only AVFrame’s and it enough to decode and show this video on phone screen. But i can’t establish working video stream to youtube.

  The problem is that all examples does encoding and streaming on one device, so they have properly initialized AVStream and AVPaket. I have feeling that i’m missing something but i cant find what. I’ve passed all stages of creating broadcast, stream, initialization of AVFormatContext, and av_interleaved_write_frame returns 0. Seems like all ok.
  But on youtube i see short living indication of video stream quality, then it dissapears, and all the time there is no video.

  So the question is is it possible to establish video stream to Youtube live if you have only AVFrames that encoded on some other device, and you missing some context information ? If so - what i’m missing ?

  static AVFormatContext *fmt_context = NULL;
  
  static AVStream *video_stream;
  
  
  
  eLIVESTREAM_ERROR LIVESTREAM_Manager_Start(char* url) {
  
      eLIVESTREAM_ERROR error = LIVESTREAM_ERROR;
  
      av_register_all();
  
      avcodec_register_all();
  
      fmt_context = avformat_alloc_context();
  
  
  
      AVOutputFormat *ofmt = NULL;
  
      if (fmt_context != NULL) {
  
          ofmt = av_guess_format("flv", NULL, NULL);
  
          if (ofmt != NULL) {
  
              fmt_context->oformat = ofmt;
  
  
  
              video_stream = av_new_stream(fmt_context, 0);
  
              AVCodec *video_codec = avcodec_find_decoder(AV_CODEC_ID_H264);
  
              AVCodecContext *video_codec_ctx = video_stream->codec;
  
              video_codec_ctx->pix_fmt = PIX_FMT_YUV420P;
  
              video_codec_ctx->skip_frame = AVDISCARD_DEFAULT;
  
              video_codec_ctx->error_concealment = FF_EC_GUESS_MVS | FF_EC_DEBLOCK;
  
              video_codec_ctx->skip_loop_filter = AVDISCARD_DEFAULT;
  
              video_codec_ctx->workaround_bugs = FF_BUG_AUTODETECT;
  
              video_codec_ctx->codec_type = AVMEDIA_TYPE_VIDEO;
  
              video_codec_ctx->codec_id = AV_CODEC_ID_H264;
  
              video_codec_ctx->skip_idct = AVDISCARD_DEFAULT;
  
              video_codec_ctx->time_base.num = 1;
  
              video_codec_ctx->time_base.den = 30;
  
              video_codec_ctx->width = 640;
  
              video_codec_ctx->height = 386;
  
  
  
              if(fmt_context->oformat->flags & AVFMT_GLOBALHEADER)  
  
                 video_codec_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
  
  
  
              int codec_open_rslt = avcodec_open2(video_codec_ctx, video_codec, NULL);
  
              if (codec_open_rslt < 0) {
  
                  error = LIVESTREAM_ERROR;
  
              }
  
  
  
              if (!(ofmt->flags & AVFMT_NOFILE)) {
  
                  int open_rslt = avio_open(&fmt_context->pb, url, URL_WRONLY);
  
                  if (open_rslt == 0) {
  
                      int wrt_header_rslt = avformat_write_header(fmt_context, NULL);
  
                      if (wrt_header_rslt == 0) {
  
                          error = LIVESTREAM_OK;
  
                      } else {
  
                          avio_close(fmt_context->pb);
  
                      }
  
                  }
  
              }
  
          }
  
      }
  
      if (error != LIVESTREAM_OK) {
  
          if (ofmt != NULL) {
  
              av_free(ofmt);
  
          }
  
          if (fmt_context != NULL) {
  
              av_free(fmt_context);
  
          }
  
      }
  
      return error;
  
  }
  
  
  
  eLIVESTREAM_ERROR LIVESTREAM_Manager_Send (uint8_t *data , int size) {
  
      eLIVESTREAM_ERROR error = LIVESTREAM_OK;
  
      if (fmt_context == NULL || size <= 0 || data == NULL) {
  
          error = LIVESTREAM_ERROR;
  
      }
  
      if (error == LIVESTREAM_OK) {
  
          AVPacket pkt;
  
          av_init_packet(&pkt);
  
          pkt.stream_index = video_stream->index;
  
          pkt.data = data;
  
          pkt.size = size;
  
          pkt.pts = AV_NOPTS_VALUE;
  
          pkt.dts = AV_NOPTS_VALUE;
  
          pkt.duration = 0;
  
          pkt.pos = -1;
  
          int write_rslt = av_interleaved_write_frame(fmt_context, &pkt);
  
          if (write_rslt != 0) {
  
              error = LIVESTREAM_ERROR;
  
          }
  
      }
  
      return error;
  
  }
  
  
  
  void LIVESTREAM_Manager_Finish () {
  
      av_write_trailer(fmt_context);
  
      avio_close(fmt_context->pb);
  
      av_free(fmt_context);
  
      fmt_context = NULL;
  
  }