Recherche avancée

Sur d’autres sites (5384)

• RTMP Nginx exec_push with alaw and h264

  10 février 2021, par AFortunato

  I have 2 RTMP servers, one NGINX with the RTMP module, and a second one that can only consume RTMP with H264 and ALAW, which will receive video from the NGINX one.

  


  I successfully pushed my camera image to the second server using Gstreamer :

  


  gst-launch-1.0 v4l2src device="/dev/video0" ! videoconvert ! video/x-raw,format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency key-int-max=20 ! flvmux name=flvmux ! rtmpsink location=rtmp://:1935/publish/foobar audiotestsrc ! alawenc ! flvmux.


  


  Now, I need to send a video from the NGINX server to the second server, but it needs to have H264 video encoding and ALAW audio encoding.

  


  I tried one more intermediate step, where I streamed to the NGINX server and ran

  


  gst-launch-1.0 rtmpsrc location=rtmp://:1935/live/100 ! videoconvert ! video/x-raw,format=I420 ! x264enc speed-preset=ultrafast tune=zerolatency key-int-max=20 ! flvmux name=flvmux ! rtmpsink location=rtmp://:1935/publish/foobar audiotestsrc ! alawenc | flvmux.


  


  but I got

  


  Setting pipeline to PAUSED ...
pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstRTMPSrc:rtmpsrc0: Internal data stream error.
Additional debug info:
gstbasesrc.c(3072): gst_base_src_loop (): /GstPipeline:pipeline0/GstRTMPSrc:rtmpsrc0:
streaming stopped, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.


  


  What am I missing in the GStreamer command ? And how can I add it to the NGINX application to automatically push the streams received ? I'm ok with doing it with FFmpeg if I need to.

  


  Thank you

  


  EDIT :

  


  My first server will be fed with a stream from a mobile app. This server (NGINX) is configured like this :

  


  application live {
   live on;
   interleave on; 
}


  


  This server should push to a second server (written in Go), which is going to convert RTMP to WebRTC so I can play the stream in a browser. As I previously stated, I have successfully streamed RTMP to the second server with GStreamer, but I want the first server to automatically push to the second, and it's that push that I been able todo yet.

  


  EDIT 2 :

  


  I have used VLC and the encoding is H264, so no problem there. But I do need ALAW instead of MPEG AAC audio, how can I change on the NGINX server when I push it to the second server ?

  


• How to choose where a file is saved using FFMPEG

  13 juillet 2018, par MilkToast

  I was wondering how I could go about doing telling FFMPEG where to save files it converts, it keeps making the files save way too deep in my computer.

  check_output("ffmpeg -i " + location + " -vn -ar 44100 -ac 1 -b:a 32k -f wav audio.wav", shell=True)

  I use that in my program to convert the files to wav.

• download youtube video as audio file, with URL in filename, to a specific output directory

  9 octobre 2018, par thanks_in_advance

  I do this to download a video as an audio file (mp3), with the video’s youtube URL (URI actually) in the audio file’s filename (I like having the URI in the filename because it helps me identify which video I grabbed the audio from) :

  youtube-dl --extract-audio --audio-format mp3 --prefer-ffmpeg --ffmpeg-location "C:\FFMPEG" "https://www.youtube.com/watch?v=k1-TrAvp_xs" --audio-quality 0

  The con with this approach : with this command, the file downloads to the same directory that contains youtube-dl.exe

  ---

  I do this to download a youtube video as an audio file (mp3) to a specific output directory :

  youtube-dl -o "C:\Documents\Downloads\%(title)s.%(ext)s" --extract-audio --audio-format mp3 --prefer-ffmpeg --ffmpeg-location "C:\FFMPEG" "https://www.youtube.com/watch?v=k1-TrAvp_xs" --audio-quality 0

  The con with this approach : with this command, the downloaded audio file’s filename doesn’t contain the youtube video’s URI.

  ---

  My Question : How can I combine the above 2 commands such that the downloaded audio file doesn’t have either of the cons mentioned above ?