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• avcodec/v4l2_buffers : Fix infinite loop

  27 octobre 2019, par Andriy Gelman

  avcodec/v4l2_buffers : Fix infinite loop
  This part of the code counts the number of planes returned by the v4l2
  
  device for each queried capture/output buffer.
  
  When testing the GPU h264 encoder on Nvidia's Jetson Nano, this caused an
  
  infinite loop because avbuf->buf.length included some empty buffers (i.e.
  
  where avbuf->buf.m.planes[i].length = 0), meaning that the counter was
  
  never incremented and break was never reached.
  
  This is fixed in the commit by using a well defined iteration range.
  Signed-off-by : Aman Gupta <aman@tmm1.net>
  

  • [DH] libavcodec/v4l2_buffers.c

• Use ffmpeg/avconv to re-stram a combined stream ?

  28 novembre 2014, par Terminello

  Having two separate stream sources (audio and video) each from an IP-camera, I would like to

  • combine them into a single stream
  • save this into a file (using segmentation)
  • re-stream (specific word unknown for me, sorry) the combined stream so that other users may access it without having to combine the streams on their own

  The first two things : I have already accomplished like that :

  ffmpeg -use_wallclock_as_timestamps 1 -f mjpeg -i 'http://camera.ip.address/videostream.cgi?user=username&pwd=password' -i 'http://camera.ip.address/videostream.asf?user=username&pwd=password' -map 0:v -map 1:a -acodec copy -vcodec copy -f segment -segment_time 3600 -reset_timestamps 1 'out%03d.mkv'

  Credits go to santiago (foscam.com forums)

  But how to make this stream available on the LAN at the same time while being recorded and saved to HDD ?

  BTW : You might ask, why do I need this : Because many clients do not have capabilitys to combine a stream from multiple sources, so I set up a server which does this task and clients do not go directly to the audio/video source (IP-camera) but catch the newly generated stram = : the idea.

• Link ffmpeg to Pydub in Serverless layer

  15 mars 2021, par akai

  I'm using the Serverless framework to deploy an app on AWS. I have created a layer, defined as follows in serverless.yml :

  


  layers:
  ffmpeg:
    path: layer


  


  I also excluded it from the main file bundle :

  


  package:
  exclude:
    - layer/**


  


  and defined a lambda function :

  


   cut_audio:
    layers:
      - {Ref: FfmpegLambdaLayer}


  


  In this function I use the Pydub library, which needs to access the ffmpeg layer. At the moment I have the following error FileNotFoundError: [Errno 2] No such file or directory: 'ffprobe', meaning I have to link ffmpeg as AudioSegment.converter(path)

  


  How do I get the path of my layer ?

  


  Edit : could I solve this by bundling both Pydub and ffmpeg in the layer ?

  


  Edit 2 : the eziotedeschi/AWS-Lambda-Layer-Pydub github repository doesn't seem to help. I get the following error No module named 'pydub'. I am using Python3.8 as runtime, that might be the issue.