Recherche avancée

Sur d’autres sites (6379)

• ffmpeg_kit_flutter_full : Video created from ffmpeg not showing in the web

  16 décembre 2024, par Đoàn Thanh Thảo

  I am implementing a screen capture widget to create a video. The video was successfully created in MP4 format and I can view it in my app and then I posted it to my web. However, on the web, I cannot see the video preview, only when I download the video and view it on my phone can I see it. I think the problem is that there is some missing format that makes the video not playable on Https. Here is my code :

  


      final command = '-y -f image2 -i $imagesPath '
    '${fps != null ? "-r $fps" : ""} '
    '-vf "scale=2000:5000" '
    // '-vf "scale=iw*$scaleMultiplier:ih*$scaleMultiplier" '
    '-c:v mpeg4 -q:v $qValue -pix_fmt yuv420p -movflags +faststart $outputVideoPath';


  


  I try to use libx264 nhưng bị báo lỗi

  


• How to share video stream to WSL2 while ffmpeg ? [closed]

  27 octobre 2024, par 笑先生

  Most solutions for using a camera in WSL are to build your own WSL kernel. I have realized it with the steps mentioned in Capturing webcam video with OpenCV in WSL2

  


  However, it's complicated and time-consuming. I want to realize it by sharing video streaming.

  


  Share method

  


  Step1 : Run the command below on Windows to check all the camera devices. I see an integrated camera "Integrated Webcam" (video) in the output.

  


  ffmpeg -list_devices true -f dshow -i dummy


  


  Step2 : Check the IP of Ethernet adapter vEthernet (WSL). In my computer, it's 172.24.176.1

  


  Step3 : Run the command below on Windows to share video streaming.

  


  ffmpeg -f dshow -i video="Integrated Webcam" -preset ultrafast -tune zerolatency -vcodec libx264 -f mpegts udp://172.24.176.1:5000


  


  Test

  


  Run the command to play the video streaming : ffplay udp://172.24.176.1:5000

  


  It can show the video when the command is run with a terminal of Windows (Win10).

  


  But, it cannot show anything when the command is run on with a terminal of WSL (Ubuntu 22.04). Why ?

  


• Using FFmpeg to receive H.264 video stream by SRTP in Windows [closed]

  29 août 2024, par Taylor Yi

  I am using LGPL version of FFmpeg on Windows. I've downloaded it from https://github.com/BtbN/FFmpeg-Builds.

  


  I have been trying to receive Secure RTP video stream using FFmpeg.
I want to receive the video as bgr24 rawvideo, and send it into output stream (using -).

  


  I have a script in GStreamer that works, so I want to convert it to FFmpeg.
Below are the GStreamer script. It plays the received video using autovideosink ;

  


  gst-launch-1.0 -v udpsrc port=4000 caps="application/x-srtp, ssrc=(uint)1356955624, mki=(buffer)01, srtp-key=(buffer)012345678901234567890123456789012345678901234567890123456789, srtp-cipher=(string)aes-128-icm, srtp-auth=(string)hmac-sha1-80, srtcp-cipher=(string)aes-128-icm, srtcp-auth=(string)hmac-sha1-80" ! srtpdec ! rtph264depay ! h264parse ! avdec_h264 ! autovideosink


  


  At first I wanted to see if the output is correct, so I set the output as a video file instead.
Here are the scripts I tried ;

  


  ffmpeg -protocol_whitelist file,udp,rtp -i settings.sdp -c:v copy out.mp4


  


  The 'settings.sdp' file is like this ;

  


  c=IN IP4 0.0.0.0
m=video 5000 RTP/SAVP 96
a=rtpmap:96 H264/90000
a=ssrc:1356955624 cname:stream
a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:ASNFZ4kBI0VniQEjRWeJASNFZ4kBI0VniQEjRWeJ|2^20|1:1
a=rtcp-mux
a=rtcp-fb:96 nack
a=srtp-cipher:aes-128-icm
a=srtp-auth:hmac-sha1-80
a=srtcp-cipher:aes-128-icm
a=srtcp-auth:hmac-sha1-80


  


  but, when I try running this script, this error log is printed ;

  


  Incorrect amount of SRTP params
[sdp @ 000001e40785f340] RTP H.264 NAL unit type 27 is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it means that your file has a feature which has not been implemented.
[sdp @ 000001e40785f340] nal size exceeds length: 6664 608
[sdp @ 000001e40785f340] nal size exceeds length: 65101 502
[h264 @ 000001e4078661c0] non-existing PPS 0 referenced
[extract_extradata @ 000001e4078c4c80] Invalid NAL unit 0, skipping.
    Last message repeated 2 times
[h264 @ 000001e4078661c0] Invalid NAL unit 0, skipping.
    Last message repeated 2 times
[h264 @ 000001e4078661c0] non-existing PPS 0 referenced
[h264 @ 000001e4078661c0] decode_slice_header error
[h264 @ 000001e4078661c0] no frame!
[sdp @ 000001e40785f340] Undefined type (30)


  


  Is there an option I didn't add ? What can I do to fix this ?