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• FFMPEG libfdk_aac codec with VBR option not supported

  25 septembre 2018, par Piri

  I’m trying to makes an app that uses terminal ffmpeg with libfdk_aac codec.
  The problem is when I use -VBR mode, the result Bit rate mode is always Constant(CBR).

  I’ve searched about this problem and I’ve found the following article :

  https://lists.ffmpeg.org/pipermail/ffmpeg-user/2013-February/013652.html
  this article is from 2013 and seems is still valid !

  Also i am not the only one with this problem
  https://superuser.com/questions/1326239/encoding-aac-from-wav?rq=1

  My terminal string is :

  ffmpeg -i input* -c:a libfdk_aac -vbr 4 output**

  1. *- input formats can be : FLAC, WEBM, MP4
  2. **- output formats can be : M4A, AAC

  Question is : Can this be solved with the current version of ffmpeg :
  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) ??
  if not, is using directly fdkaac from terminal the only option ?

  Any Help is much appreciated.

• Streaming by ffserver and ffmpeg on RaspberryPi

  15 septembre 2018, par saitoib

  I want to ditribute the video of the UVC Camera on Rpsberry Pi
  I edited /etc/ffserver.conf as follows.

  HTTPPort 8090
  
  HTTPBindAddress 0.0.0.0
  
  MaxHTTPConnections 20
  
  MaxClients 10
  
  MaxBandwidth 500000
  
  CustomLog -
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 50M
  
  </feed>
  
  
  
  <stream>
  
  Format status
  
  ACL allow 192.168.12.0 192.168.12.255
  
  </stream>
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format mpeg
  
  VideoSize hd720
  
  VideoFrameRate 15
  
  VideoBitRate 4096
  
  VideoBufferSize 4096
  
  VideoQMin 5
  
  VideoQMax 51
  
  Strict -1
  
  </stream>

  Then, I started ffserver
  Next, I executed the following command

  ffmpeg -f v4l2 -s 1280x720 -i /dev/video0 -ac 1 -f alsa -i hw:1,0 http://localhost:8090/feed1.ffm

  I requested 192.168.12.101 : 8090 / test.mpeg from FireFox on the same network,
  but no video is displayed and a program to open or a file save dialog opens.

  What should I do ?

  Execution result of Raspberry Pi

  Input #0, video4linux2,v4l2, from '/dev/video0':
  
    Duration: N/A, start: 519134.790720, bitrate: 147456 kb/s
  
      Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 147456 kb/s, 10 fps, 10 tbr, 1000k tbn, 1000k tbc
  
  Guessed Channel Layout for Input Stream #1.0 : mono
  
  Input #1, alsa, from 'hw:1,0':
  
    Duration: N/A, start: 1536994777.250578, bitrate: 768 kb/s
  
      Stream #1:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
  
  [tcp @ 0x23ec7f0] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Sat Sep 15 15:59:37 2018 [ffm @ 0xf10e40]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
  
  Sat Sep 15 15:59:37 2018 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
  
  [tcp @ 0x2401d50] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
  
  Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
  
    Metadata:
  
      creation_time   : now
  
      encoder         : Lavf57.56.101
  
      Stream #0:0: Audio: mp2, 22050 Hz, mono, s16, 64 kb/s
  
      Metadata:
  
        encoder         : Lavc57.64.101 mp2
  
      Stream #0:1: Video: mpeg1video, yuv420p, 1280x720, q=5-51, 4096 kb/s, 10 fps, 1000k tbn, 15 tbc
  
      Metadata:
  
        encoder         : Lavc57.64.101 mpeg1video
  
      Side data:
  
        cpb: bitrate max/min/avg: 8192000/0/4096000 buffer size: 33554432 vbv_delay: -1
  
  Stream mapping:
  
    Stream #1:0 -> #0:0 (pcm_s16le (native) -> mp2 (native))
  
    Stream #0:0 -> #0:1 (rawvideo (native) -> mpeg1video (native))
  
  Press [q] to stop, [?] for help
  
  [alsa @ 0x23ebee0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [alsa @ 0x23ebee0] ALSA buffer xrun. 48kB time=00:00:00.13 bitrate=2949.1kbits/s dup=3 drop=0 speed=0.251x
  
  [video4linux2,v4l2 @ 0x23ea230] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
  
  [alsa @ 0x23ebee0] ALSA buffer xrun.276kB time=00:00:02.40 bitrate= 942.1kbits/s dup=30 drop=0 speed=0.201x
  
  Sat Sep 15 15:59:55 2018 [mpeg @ 0xf136d0]VBV buffer size not set, using default size of 130KB speed=0.844x
  
  If you want the mpeg file to be compliant to some specification
  
  Like DVD, VCD or others, make sure you set the correct buffer size
  
  frame=  107 fps=3.1 q=2.0 Lsize=     856kB time=00:00:14.06 bitrate= 498.6kbits/s dup=80 drop=0 speed=0.413x
  
  video:844kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.120285%
  
  Sat Sep 15 16:00:11 2018 127.0.0.1 - - [POST] "/feed1.ffm HTTP/1.1" 200 876544
  
  Sat Sep 15 16:00:11 2018 [mpeg @ 0xf136d0]buffer underflow st=0 bufi=0 size=418
  
  Sat Sep 15 16:00:11 2018 192.168.12.150 - - [GET] "/test.mpeg HTTP/1.1" 200 29263
  
  Exiting normally, received signal 2.

  Result of 192.168.12.101:8090

  ffserver Status
  
  Available Streams
  
  Path    Served
  
  Conns   
  
  bytes   Format  Bit rate
  
  kbit/s  Video
  
  kbit/s  
  
  Codec   Audio
  
  kbit/s  
  
  Codec   Feed
  
  index.html  1   0   -   -   -       -   
  
  test.mpeg   0   0   mpeg    4160    4096    mpeg1video  64  mp2     feed1.ffm
  
  Feed feed1.ffm
  
  Stream  type    kbit/s  codec   Parameters
  
  0   audio   64  mp2 1 channel(s), 22050 Hz
  
  1   video   4096    mpeg1video  1280x720, q=5-51, fps=15
  
  Connection Status
  
  Number of connections: 1 / 10
  
  Bandwidth in use: 0k / 10000k
  
  #   File    IP  Proto   State   Target bit/s    Actual bit/s    Bytes transferred
  
  1   index.html  192.168.12.150  HTTP/1.1    HTTP_WAIT_REQUEST   0   0   0 

• Best way to convert .ts file to mp4 or bufferedimage[] java

  23 septembre 2018, par thekevshow

  I have an m3u8 file returning .ts file polls for streaming. Regardless, how would I convert that to an array of buffered images or something else that can be easily scraped for a buffered image. Mainly just looking for direction, as I am struggling to understand each piece there. Anything is appreciated.

  example response part :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:6
  
  #EXT-X-MEDIA-SEQUENCE:8476
  
  #EXT-X-TWITCH-ELAPSED-SECS:16952.000
  
  #EXT-X-TWITCH-TOTAL-SECS:16982.000
  
  #EXT-X-PROGRAM-DATE-TIME:2018-09-22T21:59:22.573Z
  
  #EXTINF:2.000,live
  
  https://video-edge-ee69bc.ord02.abs.hls.ttvnw.net/v1/segment/Cv0Dcq5qJJUV0vtPIfTrLkwrLNydN4aB6QHSSXBHxxu-ZAQyXxHtCEID2_qD-xtVV-oFG0dhKAajsbFQ0VUQpfIkPDHCJ1oh7O33nOZ4MRPcwGiOWtrv-9ukFghyg3Nc6GLBpWD3rcP-ujXBjxL3rpVP27UnfSpuBVPE-uNoXS3UxQ7sFUbI8z-t3TWLMs2GXaeos6y9L8Tw_MmMCchRGF7AM-V_mR6PpnY0JsRyBUGiLtCSYUwusYBJjBZpCEw2EP_ykmE8_xW-UQ18qvv0TwVdXPCREFPG8NL4JcytaUCkVs1bEjHlY7blYCWAJvfuc2WOpEXXRETrtkaODOFNRhMC5JCsjP2yWlSoa6K9OsvQdfP4k7pusPp7vDoCJMBfmcQ4SGYk_EVnuFS6t-HCZpfXy-JE1X1NWywUXtsn2LHktTzKa-5evHOJQSE1aMxmPW0tkgrenrlnsZ2fnYsHB-UZCbr6Yavq95qFquozTnA8Z8uC-HH-o1LSOOSnqM9FzfbiRjRmf7JlPBraK1Z7Utyvc9iHzOyL7oOPPPidCZZ9FYsuKChI1zskSeY8A41gnJloqeswHYJI5nVA6fMM6I43nKkfzL5N6gf5sesIItQPTViHQmnKg_0d236Tbu6KNTDxDPGeTfTNVoEPEJWefOEigqS6ARKLsUvXovYs8GUSEBagR4hWTKU2aUccV1Sv4NMaDOz9CsDqNksa3LUngw.ts
  
  #EXT-X-PROGRAM-DATE-TIME:2018-09-22T21:59:24.573Z
  
  #EXTINF:2.000,live
  
  https://video-edge-ee69bc.ord02.abs.hls.ttvnw.net/v1/segment/Cv0DLRareU5ZtP0V72x2DgOd59NIigzBiGka2v5iOOjI-zQwN5d5IZsdoEgbLIiaNsQE84BqdweS_4EBPT7GIJYkCZTv01KhDSai6pfbLRM0uN5_iLjoghDLvLJbdIPMK-K71uAwtxWV2mQAALw6epwlNpLh-46PmdEZLN7-21gHzmWjut-TvBHUlv6Hm_0U2VrKrvp6im9kjT1hacY-ay76z7nRrooA-Z_JIfJWjwcQ-tlteN2ULYFbkEhw_1koD9GsW4CzGHjIu-7PGR3dQHGufYDt6Q8NO8ggoVHHAT-gaflMLy5fDrfbZrU1Ngac2ZO2axc6hruMINWf8enpNIw2ZEPR1sMEo15Cwy3hbJa4BaH99_soYbNFTpzYyTXNyKU7N7lnKH12zWjzP5AOGcrJqT4nNJkdgt-kLYrlWryQNCpSGdqb6ByCVtZkrt05nk9Kad9--9wKbGEEQxp8M3XYiOYxxE6wtlV8Xk8D-azAPbi_aQ4fELFYjwR3-3TZKVk8N5RE4sKwnZkv7PbZGk1qBhgIOUen1ukm5GVuCMlRlsz5iPa9RYXd5twCILNDHCtOo1B9neqy3rG20rh0pWaKJW2k5954njzgz4gsRWKi0K9Q1784AvmE8VYrZkK7BhuyumFylcsyayCcluVLf-CSjbANM1bKYy7mib_ZPnQSEHeaaJvKjQj44oDQA0n4zHsaDNgACUNsYYtS7RwRcA.ts
  
  #EXT-X-PROGRAM-DATE-TIME:2018-09-22T21:59:26.573Z
  
  #EXTINF:2.000,live