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• HTML5 Video Compatibility (MP4, WEBM, OGG) in 2021

  19 juillet 2021, par William

  The support of HTML5 video has evolved a lot over the years. I am trying to understand whether the <video></video> element still needs to have three sources : MP4, WEBM, and OGG.

  


  There are a lot of answers throughout StackOverflow with deeply conflicting information - some of which say that you just need MP4 now, others say, MP4 and WEBM are enough, and then finally many say that you need all three (although many of those article are 10 years old).

  


  W3 suggests that either MP4 or WEBM alone would have universal support (Even though I found a 2011 article from Google saying that they would be removing support for MP4/H.264). Wikipedia paints a more complicated picture (as well as listing that Google Chrome does indeed support MP4/H.264). Azure Media services ONLY seems to allow output in MP4, which would suggest to me that MP4 must have widespread compatibility.

  


  Also see Example 1, Example 2, Example 3.

  


  Is there any definitive information on what video types to include in an HTML5 video player to achieve widespread compatibility ?

  


  Background : I am building a Content Management Platform that allows uploading videos. When a new video is uploaded, a conversion process kicks off to convert the video into the required formats. This takes time and CPU/Memory, so if it is possible I would like to convert uploaded videos into as few formats as possible.

  


  p.s. This question HAS been asked before, however, the fundamentals of playing video on the web continually evolve and most of the answers out there have become irrelevant.

  


• Intel QuickSync error : Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

  30 novembre 2018, par Arie Syamsudin

  I want to make IPTV with a topology like this :

  Restream / source -----> IPTV server -----> User

  The problem at the moment is the question of bandwidth that is still large.

  Finally I announced by IPTV software providers to transcode with Intel QuickSync video and FFmpeg.

  I followed the steps given by the software provider at the following link :
  http://www.ezhometech.com/document/intel_ffmpeg.txt

  Which comes from the link below :
  https://www.intel.com/content/dam/www/public/us/en/documents/white-paper...

  I installed IPTV software on a laptop with an Intel processor, chipset and VGA.

  [root@iptv ffmpeg-4.1]# **lspci**
  
  00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
  
  00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
  
  00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
  
  00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
  
  00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
  
  00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
  
  00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b5)
  
  00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
  
  00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 05)
  
  00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port Mobile SATA AHCI Controller (rev 05)
  
  00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
  
  01:00.0 Ethernet controller: Qualcomm Atheros AR8152 v2.0 Fast Ethernet (rev c1)
  
  02:00.0 Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
  
  
  
  [root@iptv ffmpeg-4.1]# **lspci -nn -s 0:02.0**
  
  00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09)

  but when I do a transcoding test, an error always appears :
  Error initializing output stream 0:0 — Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height.

  Error details :
  https://paste.fedoraproject.org/paste/vp9XIzbeOuyXRuLBlLfSng

  FFmpeg log :

  ./ffmpeg  -hwaccel qsv -i http://premium-play.org:8000/domm0H56Cj/q3ODLP6C16/2826 -vcodec h264_qsv -acodec copy -b:v 1200K -f mpegts udp://127.0.0.1:9011?pkt_size=1316
  
  ffmpeg version 3.2.12 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-28)
  
    configuration: --enable-libmfx --enable-nonfree
  
    libavutil      55. 34.101 / 55. 34.101
  
    libavcodec     57. 64.101 / 57. 64.101
  
    libavformat    57. 56.101 / 57. 56.101
  
    libavdevice    57.  1.100 / 57.  1.100
  
    libavfilter     6. 65.100 /  6. 65.100
  
    libswscale      4.  2.100 /  4.  2.100
  
    libswresample   2.  3.100 /  2.  3.100
  
  Input #0, mpegts, from 'http://premium-play.org:8000/domm0H56Cj/q3ODLP6C16/2826':
  
    Duration: N/A, start: 30200.274878, bitrate: N/A
  
    Program 1
  
      Metadata:
  
        service_name    : Service01
  
        service_provider: FFmpeg
  
      Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
  
      Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 125 kb/s
  
  libva info: VA-API version 1.0.0
  
  libva info: va_getDriverName() returns 0
  
  libva info: User requested driver 'iHD'
  
  libva info: Trying to open /opt/intel/mediasdk/lib64/iHD_drv_video.so
  
  libva info: Found init function __vaDriverInit_1_0
  
  libva info: va_openDriver() returns 0
  
  [h264_qsv @ 0x2a89500] Selected ratecontrol mode is not supported by the QSV runtime. Choose a different mode.
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_qsv))
  
    Stream #0:1 -> #0:1 (copy)
  
  Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

• FFMpeg : write h264 stream to mp4 container without changes

  3 mars 2017, par Bumblebee

  Good day.

  For brevity, the code omits error handling and memory management.

  I want to capture h264 video stream and pack it to mp4 container without changes. Since i don’t control the source of stream, i can not make assumptions about stream structure. In this way i must probe input stream.

      AVProbeData probeData;
  
      probeData.buf_size = s->BodySize();
  
      probeData.buf = s->GetBody();
  
      probeData.filename = "";
  
  
  
      AVInputFormat* inFormat = av_probe_input_format(&probeData, 1);  

  This code correctly defines h264 stream.

  Next, i create input format context,

      unsigned char* avio_input_buffer = reinterpret_cast<unsigned> (av_malloc(AVIO_BUFFER_SIZE));
  
  
  
      AVIOContext* avio_input_ctx = avio_alloc_context(avio_input_buffer, AVIO_BUFFER_SIZE,
  
          0, this, &amp;read_packet, NULL, NULL);
  
  
  
      AVFormatContext* ifmt_ctx = avformat_alloc_context();
  
      ifmt_ctx->pb = avio_input_ctx;
  
  
  
      int ret = avformat_open_input(&amp;ifmt_ctx, NULL, inFormat, NULL);
  
  </unsigned>

  set image size,

      ifmt_ctx->streams[0]->codec->width = ifmt_ctx->streams[0]->codec->coded_width = width;
  
      ifmt_ctx->streams[0]->codec->height = ifmt_ctx->streams[0]->codec->coded_height = height;

  create output format context,

      unsigned char* avio_output_buffer = reinterpret_cast<unsigned>(av_malloc(AVIO_BUFFER_SIZE));
  
  
  
      AVIOContext* avio_output_ctx = avio_alloc_context(avio_output_buffer, AVIO_BUFFER_SIZE,
  
          1, this, NULL, &amp;write_packet, NULL);
  
  
  
      AVFormatContext* ofmt_ctx = nullptr;
  
      avformat_alloc_output_context2(&amp;ofmt_ctx, NULL, "mp4", NULL);
  
      ofmt_ctx->pb = avio_output_ctx;
  
  
  
      AVDictionary* dict = nullptr;
  
      av_dict_set(&amp;dict, "movflags", "faststart", 0);
  
      av_dict_set(&amp;dict, "movflags", "frag_keyframe+empty_moov", 0);
  
  
  
      AVStream* outVideoStream = avformat_new_stream(ofmt_ctx, nullptr);
  
  
  
      avcodec_copy_context(outVideoStream->codec, ifmt_ctx->streams[0]->codec);
  
  
  
      ret = avformat_write_header(ofmt_ctx, &amp;dict);
  
  </unsigned>

  Initialization is done. Further there is a shifting packets from h264 stream to mp4 container. I dont calculate pts and dts, because source packet has AV_NOPTS_VALUE in them.

      AVPacket pkt;
  
      while (...)
  
      {
  
          ret = av_read_frame(ifmt_ctx, &pkt);
  
          ret = av_interleaved_write_frame(ofmt_ctx, &pkt);
  
          av_free_packet(&pkt);
  
      }

  Further i write trailer and free allocated memory. That is all. Code works and i got playable mp4 file.

  Now the problem : the stream characteristics of the resulting file is not completely consisent with the characteristics of the source stream. In particular, fps and bitrate is higher than it should be.

  As sample, below is output ffplay.exe for source stream

   Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:/movies/source.mp4':0/0
  
   Metadata:
  
       major_brand     : isom
  
       minor_version   : 1
  
       compatible_brands: isom
  
       creation_time   : 2014-04-14T13:03:54.000000Z
  
   Duration: 00:00:58.08, start: 0.000000, bitrate: 12130 kb/s
  
   Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661),yuv420p, 1920x1080, 12129 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
  
   Metadata:
  
       handler_name    : VideoHandler
  
   Switch subtitle stream from #-1 to #-1 vq= 1428KB sq=    0B f=0/0
  
   Seek to 49% ( 0:00:28) of total duration ( 0:00:58)       B f=0/0
  
       30.32 M-V: -0.030 fd=  87 aq=    0KB vq= 1360KB sq=    0B f=0/0  

  and for resulting stream (contains part of source stream)

   Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:/movies/target.mp4':f=0/0
  
   Metadata:
  
       major_brand     : isom
  
       minor_version   : 512
  
       compatible_brands: isomiso2avc1iso6mp41
  
       encoder         : Lavf57.56.101
  
   Duration: 00:00:11.64, start: 0.000000, bitrate: 18686 kb/s
  
   Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 18683 kb/s, 38.57 fps, 40 tbr, 90k tbn, 50 tbc (default)
  
   Metadata:
  
       handler_name    : VideoHandler
  
   Switch subtitle stream from #-1 to #-1 vq= 2309KB sq=    0B f=0/0
  
       5.70 M-V:  0.040 fd= 127 aq=    0KB vq= 2562KB sq=    0B f=0/0  

  So there is a question, what i missed when copying stream ? I will be grateful for any help.

  Best regards