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• How to stream non-exhaustive list of clips into rtmp server using ffmpeg ?

  30 octobre 2017, par codedemon

  I have program that generates clips uniform length ( around seconds ) continuously. Clips are named chronologically (DT stamp). Now I need to merge those clip and stream all of them in real time via ffmpeg.

  I prefer FFmpeg, but any other option is also welcomed.

  Thank you.

• RTSP : shodan can do what I can't do with ffmpeg [closed]

  6 août 2024, par Charlie Bronson

  Good morning, I hope someone can help me, I can't get to the bottom of this situationGood morning, I hope someone can help me, I can't get to the bottom of this situation

  


  Premise 1 : Shodan does not brute force or log in with default credentials

  


  Shodan manages to access and capture the RTSP stream and take a snapshot of an AXIS Q6045-E Mk II camera.

  


  Premise 2 : I didn't perform the installation and I don't know (and I don't want to know) the access credentials for the camera, I'm just checking its security

  


  At the request of the camera owner, I attempted to take a snapshot using ffmpeg :

  


  ffmpeg -hide_banner -loglevel verbose  -y -rtsp_transport tcp -i "rtsp://xxx.xxx.xxx.xxx:554" -an -vframes 1 -q:v 2 image.jpg


  


  and obtain this output :

  


  [tcp @ 0x61b69c5f4400] Starting connection attempt to xxx.xxx.xxx.xxx port 554
[tcp @ 0x61b69c5f4400] Successfully connected to xxx.xxx.xxx.xxx port 554
[in#0 @ 0x61b69c5f16c0] Error opening input: Invalid data found when processing input
Error opening input file rtsp://xxx.xxx.xxx.xxx:554.
Error opening input files: Invalid data found when processing input


  


  On wireshark I can see how the camera requires authentication and ffmpeg responds with a FIN ACK once it receives OK after the DESCRIBE requestOn wireshark I can see how the camera requires authentication and ffmpeg responds with a FIN ACK once it receives OK after the DESCRIBE request :

  


  My OPTION request

  


  Real Time Streaming Protocol
    Request: OPTIONS rtsp://xxx.xxx.xxx.xxx:554 RTSP/1.0\r\n
        Method: OPTIONS
        URL: rtsp://xxx.xxx.xxx.xxx:554
    CSeq: 1\r\n
    User-Agent: Lavf61.1.100\r\n
    \r\n


  


  Camera response :

  


  Real Time Streaming Protocol
    Response: RTSP/1.0 200 OK\r\n
        Status: 200
    Server: H264DVR 1.0\r\n
    Cseq: 1\r\n
    Public: OPTIONS, DESCRIBE, SETUP, TEARDOWN, GET_PARAMETER, SET_PARAMETER, PLAY, PAUSE\r\n
    \r\n


  


  My DESCRIBE request :

  


  Real Time Streaming Protocol
    Request: DESCRIBE rtsp://xxx.xxx.xxx.xxx:554 RTSP/1.0\r\n
        Method: DESCRIBE
        URL: rtsp://xxx.xxx.xxx.xxx:554
    Accept: application/sdp\r\n
    CSeq: 2\r\n
    User-Agent: Lavf61.1.100\r\n
    \r\n


  


  Camera response requesting digest authentication :

  


  Real Time Streaming Protocol
    Response: RTSP/1.0 200 OK\r\n
        Status: 200
    Server: H264DVR 1.0\r\n
    Cseq: 2\r\n
    WWW-Authenticate: Digest realm="135axxxxxxxxxxx", nonce="96n0d4Lv626w8vfu8L090B6\r\n
    \r\n


  


  My response at this point is a TCP FIN ACK.

  


  Premise 3 : I am not an RTSP or ffmpeg expert

  


  at this point I told the owner that as he could see, credentials were required for access, and he rightly says that this is not the case as shodan still manages to access.

  


  If I assume premise 1 to be true, then I'm doing something wrong in the ffmpeg request, so how can I modify the ffmpeg request to obtain a snapshot compatible with the shodan one and avoid detecting false negatives ?

  


• FFMPEG Scene Detection - Trim Blank Background from Video at the Start and End

  10 juin 2014, par user3521682

  Summary :
  Need to programatically trim video when scene is not changing at the beginning & end.

  Example video : http://www.filehosting.co.nz/finished3.mp4
  (Quality is much higher in the real video)

  Background :

  Large number of videos for online store, each video begins with a blank background, then the model walks on (at a random time, few seconds), and then walks off after a random time (around 15 seconds). The end of the video is trimmed seemingly random ; could be up to 15 seconds of ’nothing’ at the end of the video.

  The camera does not move. There is no sound on the videos.
  The videos come from a camera in MOV format, sideways.

  I already have FFMPEG converting from MOV to MP4, rotating the video, adding an audio-track, and trimming the audio at the end of the video.

  Research :
  I understand that I should probably re-encode video with a very high (?) tolerance for i-frames (so that only two are made per video) and then export the times to a text file, and use the text file to cut the video (probably parse it in BASH and use that to build the FFMPEG commands).

  Does anyone have any idea how I could generate just two key-frames per video ?

  Example video : http://www.filehosting.co.nz/finished3.mp4
  (Quality is much higher in the real video)