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• avconv stops streaming after some time

  4 juin 2014, par Dhrumil Doshi

  I am using raspberry-pi board and a usb camera attached with it. i use avconv tool to capture live video from camera and streaming it on network using rtp protocol.

  My command on server(raspberry-pi board) is as below :

  avconv -f video4linux2 -s 160x120 -i /dev/video0 -vcodec mpeg2video -r 25 -pix_fmt yuv420p -me_method epzs -b 2600k -bt 256k -f rtp rtp ://192.168.1.141:8554

  streaming works successfully using this command. Here IP address 192.168.1.141 is the ip address of my client pc. i can play live streaming on client side using vlc successfully.

  But Issue is after some time encoding and streaming on server stop automatically. And command hangs there.

  Output on server is as below :

  $ avconv -f video4linux2 -s 160x120 -v debug -i /dev/video0 -vcodec mpeg2video -r 25 -pix_fmt yuv420p -me_method epzs -b 2600k -bt 256k -f rtp rtp://192.168.1.141:8554
  
  avconv version 0.8.10-6:0.8.10-1+rpi1, Copyright (c) 2000-2013 the Libav developers
  
    built on Mar 22 2014 02:13:15 with gcc 4.6.3
  
    configuration: --arch=arm --enable-pthreads --enable-runtime-cpudetect --extra-version='6:0.8.10-1+rpi1' --libdir=/usr/lib/arm-linux-gnueabihf --prefix=/usr --disable-yasm --enable-bzlib --enable-libdc1394 --enable-libdirac --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-swscale --enable-libcdio --enable-x11grab --enable-libx264 --enable-libxvid --shlibdir=/usr/lib/arm-linux-gnueabihf --enable-shared --disable-static
  
    libavutil    51. 22. 2 / 51. 22. 2
  
    libavcodec   53. 35. 0 / 53. 35. 0
  
    libavformat  53. 21. 1 / 53. 21. 1
  
    libavdevice  53.  2. 0 / 53.  2. 0
  
    libavfilter   2. 15. 0 /  2. 15. 0
  
    libswscale    2.  1. 0 /  2.  1. 0
  
    libpostproc  52.  0. 0 / 52.  0. 0
  
  [video4linux2 @ 0x54d7a0] [4]Capabilities: 84000001
  
  [video4linux2 @ 0x54d7a0] The V4L2 driver changed the pixel format from 0x32315559 to 0x56595559
  
      Last message repeated 1 times
  
  [video4linux2 @ 0x54d7a0] The V4L2 driver changed the pixel format from 0x50323234 to 0x56595559
  
  [video4linux2 @ 0x54d7a0] The V4L2 driver set input_id: 0, input: Camera 1
  
  [rawvideo @ 0x54f860] err{or,}_recognition separate: 1; 1
  
  [rawvideo @ 0x54f860] err{or,}_recognition combined: 1; 1
  
  [video4linux2 @ 0x54d7a0] All info found
  
  [video4linux2 @ 0x54d7a0] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, video4linux2, from '/dev/video0':
  
    Duration: N/A, start: 21891.364784, bitrate: 9216 kb/s
  
      Stream #0.0, 1, 1/1000000: Video: rawvideo, yuyv422, 160x120, 1/30, 9216 kb/s, 30 tbr, 1000k tbn, 30 tbc
  
  [buffer @ 0x54f220] w:160 h:120 pixfmt:yuyv422
  
  [avsink @ 0x54d740] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
  
  [scale @ 0x54f7e0] w:160 h:120 fmt:yuyv422 -> w:160 h:120 fmt:yuv420p flags:0x4
  
  [mpeg2video @ 0x54ea60] err{or,}_recognition separate: 1; 1
  
  [mpeg2video @ 0x54ea60] err{or,}_recognition combined: 1; 1
  
  [mpeg2video @ 0x54ea60] detected 1 logical cores
  
  [mpeg2video @ 0x54ea60] Unsupported bit depth: 0
  
  [rawvideo @ 0x54f860] err{or,}_recognition separate: 1; 1
  
  [rawvideo @ 0x54f860] err{or,}_recognition combined: 1; 1
  
  Output #0, rtp, to 'rtp://192.168.1.141:8554':
  
    Metadata:
  
      encoder         : Lavf53.21.1
  
      Stream #0.0, 0, 1/90000: Video: mpeg2video, yuv420p, 160x120, 1/25, q=2-31, 2600 kb/s, 90k tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> mpeg2video)
  
  SDP:
  
  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=No Name
  
  c=IN IP4 192.168.1.141
  
  t=0 0
  
  a=tool:libavformat 53.21.1
  
  m=video 8554 RTP/AVP 32
  
  b=AS:2600
  
  
  
  Press ctrl-c to stop encoding
  
  *** drop!
  
      Last message repeated 1 times
  
  *** 1 dup!
  
  *** 16 dup! fps= 25 q=2.0 size=    1027kB time=5.24 bitrate=1605.2kbits/s dup=1 drop=2    
  
  *** drop!
  
      Last message repeated 11 times
  
  *** drop!49 fps= 26 q=2.0 size=    1059kB time=5.92 bitrate=1464.9kbits/s dup=17 drop=14    
  
      Last message repeated 2 times
  
  *** drop!76 fps= 25 q=2.0 size=    2022kB time=11.00 bitrate=1505.7kbits/s dup=17 drop=17    
  
  *** drop!48 fps= 25 q=2.0 size=    4086kB time=21.88 bitrate=1529.8kbits/s dup=17 drop=18    
  
  *** 1 dup!
  
  *** 1 dup!0 fps= 25 q=2.0 size=    4171kB time=22.36 bitrate=1528.2kbits/s dup=18 drop=19    
  
  *** 1 dup!1 fps= 25 q=2.0 size=    4859kB time=26.00 bitrate=1530.8kbits/s dup=19 drop=19    
  
  *** 1 dup!0 fps= 25 q=2.0 size=    5152kB time=27.56 bitrate=1531.5kbits/s dup=20 drop=19    
  
  *** 1 dup!3 fps= 25 q=2.0 size=    5250kB time=28.08 bitrate=1531.7kbits/s dup=21 drop=19    
  
  *** drop!64 fps= 25 q=2.0 size=    7215kB time=38.52 bitrate=1534.5kbits/s dup=22 drop=19    
  
  *** 1 dup!6 fps= 25 q=2.0 size=    7306kB time=39.00 bitrate=1534.6kbits/s dup=22 drop=20    
  
  *** drop!07 fps= 25 q=2.0 size=    8288kB time=44.24 bitrate=1534.7kbits/s dup=23 drop=20    
  
  *** 1 dup!0 fps= 25 q=2.0 size=   10054kB time=53.56 bitrate=1537.8kbits/s dup=23 drop=21    
  
  *** 1 dup!9 fps= 25 q=2.0 size=   10342kB time=55.12 bitrate=1537.1kbits/s dup=24 drop=21    
  
      Last message repeated 1 times
  
  *** drop!93 fps= 25 q=1.6 size=   10445kB time=55.68 bitrate=1536.7kbits/s dup=26 drop=21    
  
  *** 1 dup!
  
  *** 7036829 dup! 25 q=2.0 size=   10630kB time=56.68 bitrate=1536.4kbits/s dup=27 drop=22 

  Any ideas ?

  Thanks in advance.

• FFmpeg Android : Freezes / stops silently at 'SoundHandle'

  8 décembre 2014, par jgads

  I’m trying to get FFmpeg working on Android, but it seems to fail silently with no output file. I have tested the same command on Windows and it fully completes.

  I’m trying to convert an mp4 into a format which I can then ’concat’ with other videos files to make one ’compilation’ video.

  The command is :

  ffmpeg -i 1.mp4 -c copy -bsf h264_mp4toannexb -t 30 out1.ts

  The logcat shows that ffmpeg seems to get ’stuck’ - with no updates and seemingly quitting half way through. Is there anything obvious I’m doing wrong ? This is being tested on just a bog-standard Galaxy Note 2. ’ffmpeg -version’ works just fine.

  Here is the logcat :

  12-08 13:38:27.670  18599-18599/com.company.app E/﹕ Device driver API match
  
  Device driver API version: 23
  
  User space API version: 23
  
  12-08 13:38:27.670  18599-18599/com.company.app E/﹕ mali: REVISION=Linux-r3p2-01rel3 BUILD_DATE=Fri Mar 21 13:52:50 KST 2014
  
  12-08 13:38:27.710  18599-18599/com.company.app D/OpenGLRenderer﹕ Enabling debug mode 0
  
  12-08 13:38:29.060  18599-18599/com.company.app E/FFMPEG﹕ Success loading ffmpeg
  
  12-08 13:38:29.080  18599-18661/com.company.app D/FFmpeg﹕ Running publishing updates method
  
  12-08 13:38:29.090  18599-18599/com.company.app E/FFMPEG﹕ Progress: ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
  
  12-08 13:38:29.090  18599-18599/com.company.app E/FFMPEG﹕ Progress:   built on Oct  7 2014     15:08:46 with gcc 4.8 (GCC)
  
  12-08 13:38:29.095  18599-18599/com.company.app E/FFMPEG﹕ Progress:   configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
  
  12-08 13:38:29.095  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libavutil      54.  7.100 / 54.  7.100
  
  12-08 13:38:29.095  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libavcodec     56.  1.100 / 56.  1.100
  
  12-08 13:38:29.095  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libavformat    56.  4.101 / 56.  4.101
  
  12-08 13:38:29.095  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libavdevice    56.  0.100 / 56.  0.100
  
  12-08 13:38:29.095  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libavfilter     5.  1.100 /  5.  1.100
  
  12-08 13:38:29.095  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libswscale      3.  0.100 /  3.  0.100
  
  12-08 13:38:29.100  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libswresample   1.  1.100 /  1.  1.100
  
  12-08 13:38:29.100  18599-18599/com.company.app E/FFMPEG﹕ Progress:   libpostproc    53.  0.100 / 53.  0.100
  
  12-08 13:38:29.230  18599-18599/com.company.app E/FFMPEG﹕ Progress: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Pictures/videotest/1.mp4':
  
  12-08 13:38:29.230  18599-18599/com.company.app E/FFMPEG﹕ Progress:   Metadata:
  
  12-08 13:38:29.230  18599-18599/com.company.app E/FFMPEG﹕ Progress:     major_brand     : isom
  
  12-08 13:38:29.230  18599-18599/com.company.app E/FFMPEG﹕ Progress:     minor_version   : 0
  
  12-08 13:38:29.230  18599-18599/com.company.app E/FFMPEG﹕ Progress:     compatible_brands: isom3gp4
  
  12-08 13:38:29.235  18599-18599/com.company.app E/FFMPEG﹕ Progress:     creation_time   : 2014-12-03 18:40:00
  
  12-08 13:38:29.235  18599-18599/com.company.app E/FFMPEG﹕ Progress:   Duration: 00:00:03.14, start: 0.000000, bitrate: 10598 kb/s
  
  12-08 13:38:29.235  18599-18599/com.company.app E/FFMPEG﹕ Progress:     Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 10594 kb/s, SAR 65536:65536 DAR 16:9, 29.94 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
  
  12-08 13:38:29.235  18599-18599/com.company.app E/FFMPEG﹕ Progress:     Metadata:
  
  12-08 13:38:29.240  18599-18599/com.company.app E/FFMPEG﹕ Progress:       creation_time   : 2014-12-03 18:40:00
  
  12-08 13:38:29.240  18599-18599/com.company.app E/FFMPEG﹕ Progress:       handler_name    : VideoHandle
  
  12-08 13:38:29.245  18599-18599/com.company.app E/FFMPEG﹕ Progress:     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 97 kb/s (default)
  
  12-08 13:38:29.250  18599-18599/com.company.app E/FFMPEG﹕ Progress:     Metadata:
  
  12-08 13:38:29.250  18599-18599/com.company.app E/FFMPEG﹕ Progress:       creation_time   : 2014-12-03 18:40:00
  
  12-08 13:38:29.250  18599-18599/com.company.app E/FFMPEG﹕ Progress:       handler_name    : SoundHandle

• FFMPEG - Pipe PCM to STDOUT in real-time for Node.js

  20 août 2019, par bloom.510

  I am able to stream realtime PCM data from my system’s loopback driver that I can either encode raw or in WAV format using FFMPEG.

  How can I pipe the PCM to stdout as its being recorded in real-time ?

  I’m batting around in the dark here. So far I’ve tried logging stdout in Node.js, as well as creating a named pipe and listening for changes to it. None of these has returned any output.

  The basic shell command captures the audio :

  ffmpeg -f alsa -i loopout -f s16le -acodec pcm_s16le out.raw

  Using child_process.spawn() in Node.js :

  let ffmpeg = spawn('ffmpeg', [
  
      '-f', 'alsa', '-ac', '2', '-ar', '44100', '-i',
  
      'loopout', '-f', 's16le', '-acodec', 'pcm_s16le', 'out.raw',
  
  ]);

  However :

  // this never logs anything
  
  ffmpeg.stdout.on('data', (data) => {
  
      console.log(data.toString());
  
  });
  
  
  
  // this outputs what you would see in the terminal window
  
  ffmpeg.stderr.on('data', (data) => {
  
      console.log(data.toString());
  
  });

  Is there a way to access a readable stream of this file as its being created ?

  Or perhaps there is a way to stream the PCM to an RTP server and forward it as a buffer over UDP to an Express server ?

  Whatever the methodology is, the ultimate goal is to access it as a stream in Node.js and convert it into an ArrayBuffer.