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• VPS as video relay server using ffmpeg and ffserver ?

  15 juillet 2016, par Luke E

  I’m working on a project where I need to send a video stream from a laptop through a router I don’t have control of to an Android phone on another network I don’t have control of. The project also involves sending a stream of sensor data the opposite direction, for which I’m using a VPS and TCP hole punching quite successfully.

  So, I thought to myself, why not just stream the video from ffmpeg on my laptop to ffmpeg on the VPS, and then relay that via ffserver to my android phone ? That’s what I’ve been trying to do for a good while now, but haven’t had much luck. The stream is recognized by the server but when putting it out over ffserver I get errors. Here is my ffserver.conf :

  HTTPPort 9000
  
  HTTPBindAddress 
  
  RTSPPort 5454
  
  RTSPBindAddress 
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 50M
  
  </feed>
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format rtp
  
  VideoSize 960x540
  
  VideoBufferSize 0
  
  VideoFrameRate 30
  
  NoAudio
  
  AVOptionVideo flags +global_header
  
  </stream>

  And here’s the command I’m using to take the received stream on the VPS and transmit it to ffserver :

  ./ffmpeg -protocol_whitelist file,udp,rtp -i foo.sdp  -an -c copy -f rtp rtsp://:5454/feed1.ffm

  When doing this command, I get the error "rtsp ://:5454/feed1.ffm : Protocol not found"

  Any advice ?

  I also thought about doing this with netcat and just and trying to forward all data received on the VPS at a certain port 1234 to any client connected to say port 1235, but this appears to be much more difficult than I thought.

  Thanks again for any help, and hopefully this problem is interesting to others as well.

• Copy 3gp moov atom from one file to another

  1er août 2016, par message

  I was in Norway and I had an awesome time ; I recorded my ride on the sledges, and my HTC Sensation turned off when I finished my ride because my battery ran out.

  When I reached my laptop I found a 630 Mb video file my the phone, but I was not able to play it with VLC. Since I’m using Ubuntu, I tried to ffprobe my file and I received the following :

  [22:22 @ ~/Desktop] $ ffprobe VIDEO0002.3gp 
  
  FFprobe version 0.6-4:0.6-2ubuntu6.3, Copyright (c) 2007-2010 the FFmpeg developers
  
    built on Dec 21 2011 18:43:14 with gcc 4.4.5
  
    configuration: --extra-version=4:0.6-2ubuntu6.3 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-vaapi --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
  
    libavutil     50.15. 1 / 50.15. 1
  
    libavcodec    52.72. 2 / 52.72. 2
  
    libavformat   52.64. 2 / 52.64. 2
  
    libavdevice   52. 2. 0 / 52. 2. 0
  
    libavfilter    1.19. 0 /  1.19. 0
  
    libswscale     0.11. 0 /  0.11. 0
  
    libpostproc   51. 2. 0 / 51. 2. 0
  
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x8c3c010]moov atom not found
  
  VIDEO0002.3gp: Operation not permitted

  I had an idea that I might be able to use an older recorded video from my phone and simply copy the moov atom from that working file to the broken one. Any ideas about that ? How can I fix this problem ?

• encode 3 different mp4 video to a standard, then join them without encoding [closed]

  10 novembre 2023, par Joe Cook

  I've found many topics on this but none seem to work fully. when I encode them, they look like specs are equal, but when I join them they stutter and freeze.

  


  outputa.mp4 2304/1536    9.7 frame/rate   security camera no audio
outputb.mp4 1140/720   29.91 frame/rate   phone portrait
outputc.mp4 1920/1080  29.91 frame/rate   phone landscape


  


  padding looks good, and resolution is the same, joining stutters/freezes

  


  'ffmpeg\bin\ffmpeg -y -i outputc.mp4 -vf "[in]scale=iw*min(2304/iw\,1536/ih):ih*min(2304/iw\,1536/ih)[scaled]; [scaled]pad=2304:1536:(2304-iw*min(2304/iw\,1536/ih))/2:(1536-ih*min(2304/iw\,1536/ih))/2[padded]; [padded]setsar=1:1[out]" -c:v libx264 -c:a copy temp\output3.mp4'


  


  padding looks good, and resolution is the same, framerate same, joining stutters/freezes

  


  'ffmpeg\bin\ffmpeg -y -i output3.mp4 -vf "scale=2304:1536:force_original_aspect_ratio=decrease,pad=2304:1536:(ow-iw)/2:      (oh-ih)/2,setsar=1:1,fps=fps=30,settb=AVTB,setpts=PTS-STARTPTS" -vcodec libx264 -pix_fmt yuv420p outputc.mp4'


  


  when I join it stutters and freezes

  


  'ffmpeg -f concat -safe 0 -i list.txt -c:v copy -c:a copy output.mp4'