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• Duration of source video and subtracted audio are different

  22 avril 2018, par zpc

  The duration of source video and subtracted wav audio is different , why ?

  I’m recorgnizing subtitle from audio, and I need to add subtitle back to video. So I want the duration of audio and video the same.

  ffmpeg -i http://cdn.live.360.cn/huikan_news/vod-media/_XW_203286B417B7C6466B3B_20160627185953.m3u8 -vn test.wav -y

  My CLI :

  [zhangpengcheng@mobiledev03v ifly]$ ffprobe http://cdn.live.360.cn/huikan_news/vod-media/_XW_203286B417B7C6466B3B_20160627185953.m3u8 2>&1 | grep Duration
  
    Duration: 00:06:51.99, start: 1.400000, bitrate: 0 kb/s
  
  
  
  
  
  [zhangpengcheng@mobiledev03v ifly]$ ffmpeg -i http://cdn.live.360.cn/huikan_news/vod-media/_XW_203286B417B7C6466B3B_20160627185953.m3u8 -vn test.wav -y
  
  ffmpeg version 3.1.3 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17)
  
    configuration: --prefix=./build/ --enable-shared --enable-static --enable-libx264 --enable-avisynth --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libopencv --enable-librtmp --enable-gpl --enable-nonfree
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.101 / 57.  0.101
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  Input #0, hls,applehttp, from 'http://cdn.live.360.cn/huikan_news/vod-media/_XW_203286B417B7C6466B3B_20160627185953.m3u8':
  
    Duration: 00:06:51.99, start: 1.400000, bitrate: 0 kb/s
  
    Program 0 
  
      Metadata:
  
        variant_bitrate : 0
  
      Stream #0:0: Video: h264 (Baseline) ([27][0][0][0] / 0x001B), yuv420p(tv, smpte170m/bt709/bt709), 668x376, 15 tbr, 90k tbn, 180k tbc
  
      Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, mono, fltp, 65 kb/s
  
  [wav @ 0x10182e0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Output #0, wav, to 'test.wav':
  
    Metadata:
  
      ISFT            : Lavf57.41.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, mono, s16, 705 kb/s
  
      Metadata:
  
        encoder         : Lavc57.48.101 pcm_s16le
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (aac (native) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  size=   31904kB time=00:06:51.84 bitrate= 634.6kbits/s speed= 146x    
  
  video:0kB audio:31904kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000239%
  
  
  
  
  
  [zhangpengcheng@mobiledev03v ifly]$ ffprobe test.wav 2>&1 | grep Duration
  
    Duration: 00:06:10.40, bitrate: 705 kb/s

• FFMPEG HLS stream for Android and IOS

  30 juin, par Poda

  I'm trying to stream to mobile devices with ffmpeg and apache2.2 but I haven't been successful.

  



  I used this command to create the segments and the playlist :

  



  ffmpeg -i http://x.x.x.x:8080 -codec:v libx264 -r 25 -pix_fmt yuv420p -profile:v baseline -level 3 -b:v 500k -s 640x480 -codec:a aac -strict experimental -ac 2 -b:a 128k -movflags faststart -flags -global_header -map 0 -f hls  -hls_time 10 -hls_list_size 5 -hls_allow_cache 0 -sc_threshold 0 -hls_flags delete_segments -hls_segment_filename out%05d.ts list.m3u8


  



  The source is a http stream which is streamed by VLC media player.

  



  Example content of the list.m3u8 file :

  



  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-ALLOW-CACHE:NO
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:89
#EXTINF:10.000000,
out00089.ts
#EXTINF:10.000000,
out00090.ts
#EXTINF:10.000000,
out00091.ts
#EXTINF:10.000000,
out00092.ts
#EXTINF:9.000000,
out00093.ts
#EXT-X-ENDLIST


  



  I created another playlist file - playlist.m3u8 :

  



  #EXTM3U
#EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=512000
http://x.x.x.x/list.m3u8


  



  If I open this (playlist.m3u8) file in VLC media player then it plays.
It also works in desktop chrome and desktop firefox browsers with Video-js plugin flash fallback.

  



  I set the correct MIME types to the .ts and .m3u8 files in .htaccess file :

  



  AddType application/x-mpegURL .m3u8
AddType video/MP2T .ts


  



  FFprobe output for playlist.m3u8 :

  



  Input #0, hls,applehttp, from 'playlist.m3u8':
    Duration: N/A, start: 1.400000, bitrate: N/A
    Program 0
    Metadata: variant_bitrate : 512000
Stream #0:0: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
Metadata: variant_bitrate : 512000
Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 128 kb/s
Metadata: variant_bitrate : 512000


  



  What should I do to make it work ?

  



  UPDATE

  



  It works if I provide a link to list.m3u8 file (created by ffmpeg).

  


• Use ffmpeg to stream live content to azure media services

  19 mars 2018, par Dadicool

  I’ve been trying to stream content to azure media services using ffmpeg as it’s one of the options described here : http://azure.microsoft.com/blog/2014/09/18/azure-media-services-rtmp-support-and-live-encoders/

  My command is :

  ffmpeg -v verbose -i 300.mp4 -strict -2 -c:a aac -b:a 128k -ar 44100 -r 30 -g 60 -keyint_min 60 -b:v 400000 -c:v libx264 -preset medium -bufsize 400k -maxrate 400k -f flv rtmp://nessma-****.channel.mediaservices.windows.net:1935/live/584c99f5c47f424d9e83ac95364331e7

  I have made sure that the streaming endpoint has one active streaming unit, I also made sure that the channel is actually Ready and I even get it to start streaming (which makes a PublishURL available).

  When I execute the ffmpeg command to start streaming, I keep getting the following error :

  ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
 built on Dec 30 2014 11:31:18 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
 configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --enable-libvidstab --enable-libx265 --arch=x86_64 --enable-runtime-cpudetect
 libavutil      54. 15.100 / 54. 15.100
 libavcodec     56. 13.100 / 56. 13.100
 libavformat    56. 15.102 / 56. 15.102
 libavdevice    56.  3.100 / 56.  3.100
 libavfilter     5.  2.103 /  5.  2.103
 libswscale      3.  1.101 /  3.  1.101
 libswresample   1.  1.100 /  1.  1.100
 libpostproc    53.  3.100 / 53.  3.100
Routing option strict to both codec and muxer layer
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9a0a002c00] overread end of atom 'colr' by 1 bytes
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9a0a002c00] stream 0, timescale not set
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f9a0a002c00] max_analyze_duration 5000000 reached at 5003637 microseconds
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '300.mp4':
 Metadata:
   major_brand     : mp42
   minor_version   : 0
   compatible_brands: mp42isomavc1
   creation_time   : 2014-01-11 05:39:32
   genre           : Trailer
   artist          : Warner Bros.
   title           : 300: Rise of an Empire - Trailer 2
   encoder         : HandBrake 0.9.9 2013051800
   date            : 2014
 Duration: 00:02:33.24, start: 0.000000, bitrate: 7377 kb/s
   Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 (1920x1088), 7219 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
   Metadata:
     creation_time   : 2014-01-11 05:39:32
     encoder         : JVT/AVC Coding
   Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 157 kb/s (default)
   Metadata:
     creation_time   : 2014-01-11 05:39:32
   Stream #0:2: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 101x150 [SAR 72:72 DAR 101:150], 90k tbr, 90k tbn, 90k tbc
rtmp://nessma-****.channel.mediaservices.windows.net:1935/live/584c99f5c47f424d9e83ac95364331e7: Input/output error

  The Azure blog post clearly states that this should be possible but I can’t find a working example anywhere.

  Environment :

  • MacOS Maverick
  • FFMPEG installed from official build
  • 300.mp4 : 1080p trailer of the latest 300 movie