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• Getting error while streaming with ffmpeg

  30 novembre 2019, par Tirtha

  I am trying to stream with ffmpeg. Video source is vmix. While streaming ffmpeg throws i/o error and stops.
  Available Devices :

  [dshow @ 0000028c44498ec0] DirectShow video devices (some may be both video and audio devices)
  
  [dshow @ 0000028c44498ec0]  "e2eSoft VCam"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_pnp_\\?\root#image#0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
  
  [dshow @ 0000028c44498ec0]  "HP Truevision HD"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_pnp_\\?\usb#vid_04f2&pid_b50d&mi_00#6&2557162&1&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
  
  [dshow @ 0000028c44498ec0]  "vMix Video"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{8E14549A-DB61-4309-AFA1-3578E927E938}"
  
  [dshow @ 0000028c44498ec0]  "vMix Video External 2"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{8E14549A-DB61-4309-AFA1-3578E927F974}"
  
  [dshow @ 0000028c44498ec0]  "vMix Video YV12"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\{8E14549A-DB61-4309-AFA1-3578E927FF92}"
  
  [dshow @ 0000028c44498ec0] DirectShow audio devices
  
  [dshow @ 0000028c44498ec0]  "Microphone (Realtek High Definition Audio)"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{3522D665-FB21-41E0-AF83-CC3432431D30}"
  
  [dshow @ 0000028c44498ec0]  "vMix Audio"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{008E145B-DB61-4309-AEA1-3578E927E940}"
  
  [dshow @ 0000028c44498ec0]  "vMix Audio - Bus A"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{008E145B-DB61-4309-AEA1-3578E927E944}"
  
  [dshow @ 0000028c44498ec0]  "vMix Audio - Bus B"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{008E145B-DB61-4309-AEA1-3578E927E948}"
  
  [dshow @ 0000028c44498ec0]  "vMix Audio - M A B"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{008E145B-DB61-4309-AEA1-3578E927E952}"
  
  [dshow @ 0000028c44498ec0]  "vMix Audio - M A"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{008E145B-DB61-4309-AEA1-3578E927E956}"
  
  [dshow @ 0000028c44498ec0]  "CABLE Output (VB-Audio Virtual Cable)"
  
  [dshow @ 0000028c44498ec0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{D27F382E-4EA5-49D0-8F87-2B5F144BC155}"

  I tried to stream using the command as :

  ffmpeg -re -rtbufsize 1024M -framerate 25 -f dshow -video_size 1280x720 -channels 2 -i video="vMix Video":audio="vMix Audio" -c:v libx264 -pix_fmt yuv420p -g 50 -crf 20 -profile:v high -preset:v veryfast -tune film -c:a libfaac -b:a 256k -f mp4 "D:\recordedfile.mp4"

  Getting error as :

  [dshow @ 0000028144d4c7c0] Could not set video options
  
  video=vMix Video:audio=vMix Audio: I/O error

  Video interface works fine if i use other tools like gstreamer but its not working with ffmpeg. Please suggest where I am wrong or what I am missing ? I am using windows OS. Thank you for reading.

• FFMPEG DirectShow AJAX Audio capture

  1er septembre 2019, par NiCO

  I have an AJA board with an SDI input cable connected to it.
  The input signal has video and audio embeded.

  The video is accesible through the "Vid" Pin and the audio is accesible through the "Aud 1-2" pin.

  Well running DirectShow filter graphs :

  

  

  "No Direct Show Audio Devices" :

  

  I cannot get FFMPEG to correctly map the audio part.

  This is what I tried without success to record the audio :

  ffmpeg -y -rtbufsize 2048M -f dshow -i audio="AJA S-Capture KonaLHi- 0"  -acodec pcm_s24le -ar 48000 output.wav
  
  
  
  ffmpeg -y -rtbufsize 2048M -f dshow -audio_pin_name "Aud 1-2" -i audio="AJA S-Capture KonaLHi- 0"  -acodec pcm_s24le -ar 48000 output.wav

  this is the return error I get
  return error :

  

  The filter is NOT being used by any other software.
  I have no problems recording the video.

• Stream Live IP cam to Youtube on FFMPEG

  24 juillet 2018, par Håkon Berntsen

  I`m streaming 2 IP cams (live webcam for tourists) from 2 Raspberry Pi, using FFMPEG (version 3.4.2) to YouTube. IPcam no.1 and Raspberry no.1 fails once a month or so, and that issue is solved with a Cron job that restarts the scripts if the service is not running.

  The stream from IPcam no.2 fail after 1 hour to maybe 24 hours, even though its the same FFMPEG command and same setup.
  FFMPEG keep streaming and the service is running on the Raspberry. YouTube stop receiving the stream, but there is no logs to be found at YouTube.

  The bandwidth is not an issue (fiber), and the cameras are both connect with Cat5 cable. The only way to restart the stream (so YouTube restart the stream) is to restart the service (since its an cronjob that restart the service only if the service is no longer running, I`m forced to do a pkill). I have also tried to set up another cron job that kills the service every 15 minutes, but its not really an elegant solution.

  Both cameras streams H264.

  Stream no.2 can be seen here : https://www.youtube.com/embed/live_stream?channel=UCEJJjA5IsjE0JjuiqfxZFaw

  The command I`m using is :

  COMMAND="sudo ffmpeg  -f lavfi -i anullsrc -thread_queue_size 512   -rtsp_transport tcp  -i ${RTSP_URL}  -vcodec libx264   -pix_fmt + -c:v copy -c:a aac  -f flv ${YOUTUBE_URL}/${YOUTUBE_KEY}"

  I hope there is someone that can help with ideas to the command or to why the stream fail.