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• Solution for VB6 to broadcast Webcam

  11 juillet 2014, par vantrung -cuncon

  Sorry, I know VB6 is decades ago, but I’m in a situation that I have to use VB6 to deliver live webcam stream beetween 2 PC in Server - Client Model program. Vb6-code holds the connection then I have no choice but to transfer all data via that connection.

  I’ve tried weeks for this, uncountable approaches but went to nowhere.
  My efforts focused on 3 major approaches :

  1/ Use ffmpeg to record live webcam as ".avi" file on hard disk, transfer parts of file to other end & play it. But I’ve stucked with a media-player that can play a "being written" avi file.

  Windows Media Player control told me "file already in use..." & VLC Plugin can’t even be added to VB6 (axvlc.dll).

  2/ Use ffmpeg to save live webcam as avi file, transfer each bit of that file to the other end, then in other end, extract 24 images / second from the avi to display continously in a picture box.
  This approach is ok except that my hard disk get fulled of images in a time of wink and my program get very slow before hanging.

  3/ Use ffmpeg to stream the live webcam to a rtp-port like this :

  ffmpeg -f dshow -i video="Lenovo EasyCamera" -vcodec mpeg2video -pix_fmt yuv422p -f rtp -an rtp://224.1.2.3:8191

  I’ve successfully watch the stream in VLC, but VLC(axvlc.dll) refused to be integrated into ancient VB6. And more important, I don’t know how to redirect/reroute the rtp stream to other PC with VB6.

  Any one please light me up ? (Any 3rd party component is welcomed)

• Encoding video stream by http protocol using ffmpeg library

  20 juillet 2014, par user3780677

  I’m trying to encode video files, that users upload on my server.
  I interpretate file as stream, incoming on my server by http protocol and use ffmpeg for realtime file encoding, while upload procedure executes.

  When source file have .avi format, I have successful encoding result, but on .mp4 format appears error :

  ---------------------
  
  [buffer @ 0000000000308380] Unable to parse option value "-1" as pixel format
  
  Last message repeated 1 times
  
  [buffer @ 0000000000308380] Error setting option pix_fmt to value -1.
  
  ---------------------

  I think this might be because .mp4 contains "moov atom" data in the end of file.
  I think so because when I processing file by "-movflags faststart" command before encoding, I also have successful result.

  That is the command i using now :

  ffmpeg -i http://myhost.com/app/video/video2.mp4 -f mp4 -vcodec libx264 -b:v 800K -acodec libvo_aacenc -b:a 128K -ar 44100 -ac 2 -y c:/watch-and-get/video/video5.mp4

  Can I resolve this problem and encode multiple video formats as a stream without any excess steps ?

• How to merge image and audio to video with the same color ? (FFMPEG)

  6 février 2019, par JeanClothem

  i try to merge audio and image to video in ffmpeg,

  The problem that export does not have the same color as the original

  ---

  Here is a comparison on YouTube

  Original : https://www.youtube.com/watch?v=NsSBI9qwFE4

  Export ffmpeg : https://www.youtube.com/watch?v=FsxwqTSqpbQ

  ffmpeg -loop 1 -i rose.jpg -i rose.flac -c copy -shortest rose.mkv

  I want to get the same color as my original image

  Thank you !