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• configure : fix —enable-omx compile on raspberry pi

  29 août 2019, par Aman Gupta

  configure : fix —enable-omx compile on raspberry pi
  Many ffmpeg + rpi compilation guides on the internet recommend
  
  using `./configure —enable-omx —enable-omx-rpi`. This fails
  
  to find the IL OMX headers on device because the omx require_headers
  
  check happens first before the add_cflags in omx_rpi.
  A workaround is to use `./configure —enable-omx-rpi` only, since
  
  omx_rpi already implies omx. But because many users expect to use
  
  existing scripts and commands, we swap the order here so omx_rpi
  
  special cases are applied first.
  In the past this wasn't an issue because users noticed the OMX_Core.h
  
  missing error and installed libomxil-bellagio-dev. But since
  
  76c82843ccad1, the rpi specific headers from /opt/vc/include/IL
  
  are required.
  Signed-off-by : Aman Gupta <aman@tmm1.net>
  

  • [DH] configure

• How do I convert a 3D SBS dual-fisheye image to 3D SBS dual-equirectangular with only open-source tools ? [closed]

  21 octobre 2024, par Ethan T

  Canon has released a new 3D VR lens for their RF mount and I recently rented it to see what it's like to work with. Unfortunately, they charge a subscription fee for their conversion software, which I've also found to be inconveniently limited in real-world use cases. Thus I'm interested in an open-source approach to converting the video captured by this lens using something like ffmpeg.

  


  The video is dual-fisheye and the Canon tool produces dual-equirectangular side-by-side video. I would like to perform this same conversion in ffmpeg or a similarly-powerful open-source tool.

  


  Related questions exist but aren't quite correct. Most dual-fisheye input seems to be used to create 360-degree 2D video, not 3D SBS.

  


• ffserver streams webm data, but nothing is displayed

  2 novembre 2015, par Daniël Bakker

  I’m trying to stream webcam data over the internet on a lubuntu machine. To achieve this, I’ve installed ffmpeg and ffserver. However, I can’t seem to get this to work.
  I would like to use the webm format to integrate it as an HTML5 video. I found several examples of this on the internet, so that is where I based my settings on. This is the ffserver config I have at the moment :

  HTTPPort 8090                      # Port to bind the server to
  
  HTTPBindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 10000             # Maximum bandwidth per client
  
                                 # set this high enough to exceed stream bitrate
  
  CustomLog -
  
  #NoDaemon                       # Remove this if you want FFserver to daemonize after start
  
  
  
  <feed>               # This is the input feed where FFmpeg will send
  
     File ./feed1.ffm            # video stream.
  
     FileMaxSize 5M              # Maximum file size for buffering video
  
     ACL allow 127.0.0.1         # Allowed IPs
  
  </feed>
  
  
  
  <stream>              # Output stream URL definition
  
     Feed feed1.ffm              # Feed from which to receive video
  
     Format webm
  
  
  
     # Audio settings
  
     #AudioCodec vorbis
  
     #AudioBitRate 64             # Audio bitrate
  
     NoAudio
  
  
  
     # Video settings
  
     VideoCodec libvpx
  
     VideoSize 640x480           # Video resolution
  
     VideoFrameRate 2           # Video FPS
  
     AVOptionVideo flags +global_header  # Parameters passed to encoder
  
                                         # (same as ffmpeg command-line parameters)
  
     #AVOptionVideo cpu-used 0
  
     AVOptionVideo qmin 1
  
     AVOptionVideo qmax 42
  
     #AVOptionVideo quality good
  
     AVOptionAudio flags +global_header
  
     #PreRoll 1
  
     #StartSendOnKey
  
     VideoBitRate 400            # Video bitrate
  
  </stream>
  
  
  
  <stream>            # Server status URL
  
     Format status
  
     # Only allow local people to get the status
  
     ACL allow localhost
  
     ACL allow 192.168.0.0 192.168.255.255
  
  </stream>
  
  
  
  <redirect>    # Just an URL redirect for index
  
     # Redirect index.html to the appropriate site
  
     URL http://www.ffmpeg.org/
  
  </redirect>

  I put the FPS at 2 seconds, pretty much the maximum the computer I’m using can achieve is 4 for some reason. I then start ffmpeg with the following command :

  ffmpeg -f video4linux2 -s 640x480 -r 2 -i /dev/video0 -c:v libvpx http://localhost:8090/feed1.ffm. 

  The input is a standard UVC webcam that wprks properly (tested with cheese), ffmpeg seems to work (setting a file as ouput works properly) and the link to ffserver seems to work, the two programs regocnize each other. If an application requests the ffserver stream, it does receive data. wget for example results in a file of the size you would expect with the given bitrate. However, opening the stream in a webpage does not work.
  I tried it in two ways : simply browsing to the webm link. firefox indicates it’s receiving some data, but nothing is displayed. ffserver also indicates that a normal amount of data is transferred. The second option I tried was webpage with video tags for the video stream :

  <video with="640" height="480" autoplay="autoplay">
  
    <source src="http://localhost:8090/camera1.webm" type="video/webm">
  
  </source></video>

  but this works neither.
  Who has any idea where I went wrong ?