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• Capturing stream that has multiple frames

  22 mai 2016, par cheese5505

  I’m trying to capture a stream that has multiple "frames" (not sure that’s what you would call it but it has multiple 5 second streams inside of it) with FFmpeg and saving to file. When I put it into Quicktime player and play it works fine, however when I put it into FFmpeg and review the final file it seems that the audio and video are out of sync and the video frequently stops. I think this may be because it is stopping to switch to the new 5 second video but i’m not sure. This is the command I am using :

  ffmpeg \
  
      -v 9 \
  
      -loglevel 99 \
  
      -y \
  
      -re \
  
      -hwaccel auto \
  
      -threads 4 \
  
      -user-agent "Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_0 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7A341 Safari/528.16" \
  
      -i "url here" \
  
      -ac 2 \
  
      -strict -2 \
  
      -c:a aac \
  
      test.mov

  In the FFmpeg log this frequently happens :

  frame=  242 fps=102 q=29.0 size=     252kB time=00:00:06.33 bitrate= 325.9kbits/
  
  frame=  279 fps= 96 q=29.0 size=     252kB time=00:00:07.57 bitrate= 272.8kbits/
  
  frame=  301 fps= 87 q=29.0 size=     252kB time=00:00:08.30 bitrate= 248.7kbits/
  
  frame=  319 fps= 79 q=29.0 size=     252kB time=00:00:08.90 bitrate= 231.9kbits/
  
  frame=  338 fps= 74 q=29.0 size=     252kB time=00:00:09.54 bitrate= 216.5kbits/
  
  frame=  354 fps= 70 q=29.0 size=     252kB time=00:00:10.07 bitrate= 205.0kbits/
  
  skipping 5 segments ahead, expired from playlists
  
  [https @ 0x7f9d81e10380] No trailing CRLF found in HTTP header.
  
  frame=  355 fps= 51 q=29.0 size=     252kB time=00:00:10.11 bitrate= 204.3kbits/
  
  [hls,applehttp @ 0x7f9d83001000] No longer receiving playlist 6
  
  [hls,applehttp @ 0x7f9d83001000] No longer receiving playlist 7
  
  [hls,applehttp @ 0x7f9d83001000] No longer receiving playlist 8
  
  skipping 3 segments ahead, expired from playlists
  
  [https @ 0x7f9d81f006a0] No trailing CRLF found in HTTP header.

  Any ideas how I could smooth out the final file would be greatly appreciated.

• Converting .264 files (no ffmpeg)

  20 janvier 2018, par srob

  So I bought one of those cheapo CCTV cameras and the files are dumped as .264 which is fine on my laptop as I can use VLC to play them.

  I’d like to be able to watch on my iPhone and the VLC app doesn’t let you play them.

  So I have motion triggered clips uploaded to my server for safe storage and I’d like to write an HTML interface so I can view them in a browser after logging in.

  I code in PHP and from my research I need to convert the file into a playable format such as mp4.

  I can’t install ffmpeg on my crappy cPanel server so was wondering if anyone knows any other ways or an API I can push the file to for conversion.

  TIA !

• cvCreateFileCapture always returns "NULL"

  4 août 2012, par user1553247

  I am making an iphone-app with Xcode 4.3.3 and OpenCV 2.4

  I used that "cvCreateFileCapture("simtom.mp4")" to get frame from '.mp4' file but unfortunately, cvCreateFileCapture() always returns "NULL".

  What is the problem ?

  Here is my source code.

   CvCapture *m_pMusicVideo;     
  
  
  
   m_pMusicVideo = cvCreateFileCapture("simtom.mp4");