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• How to make mp4 from MediaStream in Chrome browser

  18 février 2017, par otiai10

  MediaRecorder.isTypeSupported('video/mp4') is false in Chrome. So I found MediaStreamRecorder https://github.com/streamproc/MediaStreamRecorder then I did

  var recorder = new MediaStreamRecorder(stream, {
    mimeType: 'video/mp4',
  });
  // also
  recorder.mimeType = 'video/mp4';
  

  But the output is webm as I checked with ffmpeg -i

  Input #0, matroska,webm, from '/Users/otiai10/Downloads/example.mp4':
    Metadata:
      encoder         : Chrome
    Duration: N/A, start: 0.000000, bitrate: N/A
      Stream #0:0(eng): Video: vp8, yuv420p, 640x480, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn, 1k tbc (default)
  

  The video is playable in Chrome but NOT on QuickTime Player, in evidence.

  Here are more details and (not!) working example of this problem.

  It was said muaz-khan/Ffmpeg.js can convert webm to mp4, but the file size matters.

  Is there any workaround to record and save as mp4?

• Encode h264 automatically on nginx server

  18 février 2017, par Thinh Pham

  I have installed and configured my own streaming server using Nginx with rtmp module base on this tutorial https://www.vultr.com/docs/setup-nginx-on-ubuntu-to-stream-live-hls-video. I only use live application and record stream into flv file. And now I want to encode any new flv files in my VOD directory automatically to play it on my website. Is it possible to config it in my nginx.conf? I have tried set record_suffix .mp4; in order to play it without encode but failed. Additional, exec ffmpeg -i is not work for me when I want to restream into mobile application.

• ffmpeg UDP stream error (subtitles)

  18 février 2017, par Peca

  I have HTTP stream which I like to convert to UDP:

  http://192.168.1.44:8001/1:0:1:1F8:1B:2C0:E080000:0:0:0:
  

  The Video, Audio and Subtitle work perfectly If I try to open this stream in VLC n Ubuntu. so far, so good

  Here is otput of FFPROBE

      ffprobe -i http://192.168.1.44:8001/1:0:1:1F8:1B:2C0:E080000:0:0:0:
  ffprobe version git-2017-01-22-f1214ad Copyright (c) 2007-2017 the FFmpeg developers
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab --enable-libwavpack --enable-nvenc
    libavutil      55. 44.100 / 55. 44.100
    libavcodec     57. 75.100 / 57. 75.100
    libavformat    57. 63.100 / 57. 63.100
    libavdevice    57.  2.100 / 57.  2.100
    libavfilter     6. 69.100 /  6. 69.100
    libavresample   3.  2.  0 /  3.  2.  0
    libswscale      4.  3.101 /  4.  3.101
    libswresample   2.  4.100 /  2.  4.100
    libpostproc    54.  2.100 / 54.  2.100
  [mpeg2video @ 0xa56fde0] Invalid frame dimensions 0x0.
      Last message repeated 2 times
  Input #0, mpegts, from 'ht tp://192.168.1.44:8001/1:0:1:1F8:1B:2C0:E080000:0:0:0:':                                                                                                         
    Duration: N/A, start: 35782.514200, bitrate: N/A                                                                                                                                         
    Program 501                                                                                                                                                                             
    Program 502                                                                                                                                                                             
    Program 503                                                                                                                                                                             
    Program 504                                                                                                                                                                             
      Stream #0:0[0x13b1]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc                           
      Stream #0:1[0x13b2]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s                                                                                             
      Stream #0:2[0x1541](srp): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:3[0x1542](slv): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:4[0x1543](hrv): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:5[0x1544](cze): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:6[0x1545](hun): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:7[0x1546](ron): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:8[0x1547](alb): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:9[0x1548](bul): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)                                                                                                               
      Stream #0:10[0x13b9](eng): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)                                                                                                             
    Program 505                                                                                                                                                                             
    Program 506
    Program 507
    Program 508
    Program 509
    Program 510
    Program 511
    Program 515
    Program 516
    Program 517
    Program 518
    Program 519
    Program 520
    Program 521
  Unsupported codec with id 94215 for input stream 10
  

  So I decide to use FFMPEG to stream to UDP, and filter out unwanted SUB's

  Here is FFMPEG cmd

  ffmpeg -reconnect 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 2048 \
      -i "http://192.168.1.44:8001/1:0:1:1F8:1B:2C0:E080000:0:0:0:" \
      -map 0:0 -vcodec copy \
      -map 0:1 -acodec copy \
      -map 0:2 -map 0:6 -scodec copy \
      -f mpegts udp://239.0.10.3:40000?pkt_size=1316
  

  And the output is:

      Output #0, mpegts, to 'udp://239.0.10.3:40000?pkt_size=1316':
    Metadata:
      encoder         : Lavf57.63.100
      Stream #0:0: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 720x576 [SAR 64:45 DAR 16:9], q=2-31, 25 fps, 25 tbr, 90k tbn, 90k tbc
      Stream #0:1: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s
      Stream #0:2(srp): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
      Stream #0:3(hun): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
  Stream mapping:
    Stream #0:0 -> #0:0 (copy)
    Stream #0:1 -> #0:1 (copy)
    Stream #0:2 -> #0:2 (copy)
    Stream #0:6 -> #0:3 (copy)
  

  And the resulting stream is DISASTER ... audio is choppy, video fall apart etc etc

  If I try same thing WITHOUT sub's (map 2 and 6) the video and audio is crystal clear and stream work well

  But I need this two sub's.

  To narrow down the problem, if I try to capture incoming stream into file:

  ffmpeg -reconnect 1 -reconnect_at_eof 1 -reconnect_streamed 1 -reconnect_delay_max 2048 \
  -i "http://192.168.1.44:8001/1:0:1:1F8:1B:2C0:E080000:0:0:0:" \
  -map 0:0 -map 0:1 -map 0:2 -map 0:6 \
  -codec copy \
  -y -f mpegts /tmp/tst.ts
  

  The resulting file is playable, sound OK, video OK, subtitles OK.

  Looks like problem is with OUTPUT to UDP ???

  Any solution for this ?

• How can I use php-FFMpeg in laravel 5.1 to convert uploaded GIF image to video format automatically ?

  18 février 2017, par Lastbusy.com

  I have installed php-ffmpeg in my localhost Laravel setup, but I need help on how to use ffmpeg with Laravel 5.1.

  I need this to convert gif image into .mp4 video format automatically. When site visitors/users upload GIF image, it should be converted into .mp4 format. (Example: Gif uploaded in 9gag.com)

  Please also suggest if there is any alternative solution to the requirement.

• Apply translational ( gemoery operator) for video frame

  18 février 2017, par Thelinh Truong

  I try to apply translational for image (video frames) of a video.

  I don't know if ffmpeg can translational video image frames.

  Please suggest me wich tool to use.

  Thanks.