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• FFMPEG to send RTSP encoded stream C++

  11 décembre 2016, par Godspped

  I am trying to figure out a way to take an encoded H264 image that I have created in FFMEG and send it out via RTSP using FFMPEG, is there some sample code or a tutorial out there that shows how to do this. I tried searching the web, but there is nothing that I could find out there.

  Any help is greatly appreciated. Thanks in advance.

• ffmpeg convert images to mp4 error

  31 mai 2013, par Ryan Saxe

  So I have a script that grabs a bunch of images from the web and then converts them into a movie. Yet I get a whole bunch of errors when I run it.

  First let me show what I am running and then I will post the error because it's huge :

  #for gif
  
  #call('convert -set delay 5 -loop 0 ' + folder + '*.jpg ' + name + '.gif', shell=True)
  
  #for mov
  
  #call('convert -quality 100 ' + folder + '*.jpg ' + name + '.mov', shell=True)
  
  #for organized movie
  
  call('ffmpeg -r 10 -b 1800 -i ' + folder + '%0' + str(size) + 'd.jpg ' + name + '.mp4', shell=True)

  So the commented out versions work fine, but I need to use the 3rd version ! Here is the response I get from ffmpeg :

  ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
  
    built on Mar 31 2013 21:55:33 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
  
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libfreetype --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
    libavutil      52. 18.100 / 52. 18.100
  
    libavcodec     54. 92.100 / 54. 92.100
  
    libavformat    54. 63.104 / 54. 63.104
  
    libavdevice    54.  3.103 / 54.  3.103
  
    libavfilter     3. 42.103 /  3. 42.103
  
    libswscale      2.  2.100 /  2.  2.100
  
    libswresample   0. 17.102 /  0. 17.102
  
    libpostproc    52.  2.100 / 52.  2.100
  
  Please use -b:a or -b:v, -b is ambiguous
  
  [mjpeg @ 0x7f8cc402a800] [IMGUTILS @ 0x7fff5a680ae0] Picture size 10835x53928 is invalid
  
      Last message repeated 26 times
  
  [mjpeg @ 0x7f8cc402a800] Found EOI before any SOF, ignoring
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (c8)
  
  [mjpeg @ 0x7f8cc402a800] [IMGUTILS @ 0x7fff5a680ae0] Picture size 54310x53928 is invalid
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
      Last message repeated 8 times
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (c5)
  
  [mjpeg @ 0x7f8cc402a800] [IMGUTILS @ 0x7fff5a680ae0] Picture size 10835x53928 is invalid
  
      Last message repeated 12 times
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
  
  [mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted
  
  [image2 @ 0x7f8cc4029c00] decoding for stream 0 failed
  
  [image2 @ 0x7f8cc4029c00] Could not find codec parameters for stream 0 (Video: mjpeg): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  /Users/ryansaxe/Desktop/kaggle_parkinsons/MOVIES/%03d.jpg: could not find codec parameters

  Note :

  [mjpeg @ 0x7f8cc402a800] mjpeg: unsupported coding type (cf)
[mjpeg @ 0x7f8cc402a800] only 8 bits/component accepted

  repeated about 30 times, but i cut it out of the traceback because it was overwhelming.

  Question : What did I do wrong and how do I fix it ?

  Edit :

  I download the jpeg files using the urllib python library's urlretrieve. This is how I save them :

  for src,name in zip(urls,range(len(urls))):
  
      file_name = folder + str(name) + '.jpg'
  
      urlretrieve(src, file_name)

• Question with complex ffmpeg compositing, overlays, visualizations etc [closed]

  14 novembre 2023, par Michael Ciesielczyk

  I'm trying to make a video that will consist of an underlying video that will need to repeat until the end of the video. The video's length as well as to video elements will come from a wav audio file. There will also be one static image overlay and 3 to 5 more images that will be overlayed at set intervals.

  


  I was able to get a little ways with a few of the elements but when I have tried to put them all together in one go I can't figure it out. And I'm trying to get it in one got to get the best possible image quality I can so I don't end up re encoding the video multiple times. I'm also using this as a template for multiple videos so when I get it figured out I can just change the images to generate the new videos.

  


  so I have these elements :

  


  background video: bg.mp4
audio file: test.wav
static image: logo.png
rotating images: 1.png, 2.png, 3.png


  


  so I have :

  


  ffmpeg -i test.wav -filter_complex " 
[0:a]avectorscope=s=1320x1240:zoom=1.5,pad=3840:2160[vs]; 
[0:a]showwaves=s=1280x202:colors=White:mode=line[sw];[vs][sw]overlay=x=(main_w- 
overlay_w)/2:y=(main_h-400)[bg]" -map "[bg]" -map 0:a  -y -acodec aac video.mp4


  


  This gets me my 4k video file and my two visualizations and my audio in my video file placed about where I want them.

  


  I can get the rotating images to appear at the right times overlayed on the bg.mp4 file with this.

  


  ffmpeg -i bg.mp4 -i 1.png -i 2.png -i 3.png -filter_complex "[0] 
[1]overlay=x=0:y=0:enable='between(t,0,4)'[out];[out] 
[2]overlay=x=0:y=0:enable='between(t,4,8)'[out];[out] 
[3]overlay=x=0:y=0:enable='between(t,8,12)'[out]" -map "[out]" video.mp4


  


  But I can't figure out how to do it all together. I have ended up with bg.mp4 file playing inside the avectorscope visual. like the rest of that box was cropping it. And I know I can loop an overlay video with -stream_loop -1 and shortest=1 but I'm not sure what to do in order to have the bg video loop until the end of the audio.

  


  I think some of my trouble is I am terrible dyslexic and a missing comma or missing close quote and it's a no go.

  


  Anyone able to help me put this together ?

  


  Oh and one last thing. I'm also wanting to put some simple text overlayed. like with

  


  overlay=0:0,drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf:fontcolor=
white:x=200:y=200:text='"text'[out]"`


  


  thank you to anyone who can help me !