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• I cannot convert a set of images taken from a FTP to a video using FFMPEG

  7 septembre 2022, par Victoriano Fernández Tomás

  I am writting a python code where I am trying to convert a set of images that I take from a FTP into a video using FFMPEG but I cannot. I have tried, instead of reading the folder where the images are, to read a txt file with the name of the images that I want to use, with the format needed in order that FFMPEG could read it propertly, but I get always the same error : Protocol 'ftp' not on whitelist 'tcp'
In the same code, I also try to change the format of one video and change the resolution and size, and this part of code works well.
However, writting as input the same reference of the FTP, the images' code fail and the video's code works.
Besides, I have tried in my terminal as local the same command I write in the code for the images, and in local it works propertly, but not in the code.
Here there is a part of my code :

  


  Video's code (it works) :

  


  command = """ffmpeg -i {i} -an -crf {r} {o}""".format(i=src_path,o=path,r=resolution)


  


  An example of this command when I run this is the next (I dont want to write the exact ip and port) :

  


  ffmpeg -i ftp://user:user@ip:port/landing_ffmpeg/pruebas/pruebahd.mp4 -an -crf 45 tmp/pruebasalida456.mp4


  


  And next the images' code (it doesnt work) :

  


  command = """ffmpeg -loop 1 -framerate {ips} -i {i} -t 10 -pix_fmt yuv420p {o}""".format(i=src_path,o=path,ips=img_per_sec)


  


  An example of this command is the next :

  


  ffmpeg -loop 1 -framerate 2 -i ftp://user:user@ip:port/landing_ffmpeg/pruebas/prueba_imagenes/prueba06.jpg -t 10 -pix_fmt yuv420p tmp/videoimagen.mp4


  


  And the error I get with this code is the next :

  


  [ftp @ 0x560eb3e11800] Protocol 'ftp' not on whitelist 'tcp'!
[image2 @ 0x560eb3e09380] Could not open file : ftp://user:user@ip:port/landing_ffmpeg/pruebas/prueba_imagenes/prueba06.jpg


  


  I dont get this error when I try to run the command of the video, only for the images. And both commands run propertly when I write in my terminal in local, with local paths.

  


  I would appreciate if someone can help me to solve the problem and fix my code.

  


  Thanks !

  


• Using libav libraries directly in c++ project instead of using Ffmpeg command external process [closed]

  9 mai 2024, par dhatchina

  i'm receiving input as raw H264 NAL units contiguously from one port and mp2 audio from the another port .i need to multiplex this both and encode as a mpeg2 transport stream. To achieve this now i'm executing required ffmpeg command as a process inside my c++ project and i get the output perfectly. but, the problem is i can't install ffmpeg in client system manually and i felt just for this single purpose using ffmpeg takes more cpu utilization also and handling external process also bit not reliable.

  


  so , i need to add required libav (ex : libavcodec ,libavformat ) libraries in my project directly and compiling into a single project and calling the required functions for encoding and multiplexing process will increase the control of process and no need of installing ffmpeg. i need suggestion to do this. i'm using RHEL 8.3 and Thanks in advance

  


• How to deal ffplay bein too slow playing iPhone's videos ?

  21 janvier 2019, par Mikhail T.

  Trying to play a 3840x2160 video recorded by an iPhone 7 (@30fps), I get frequent pauses — in the video, music keeps playing.

  This happens both in firefox and when ffplay is invoked to play the file directly — from command-line. The CPU is a dual E6700 @3.20GHz — not super fast, but it should be able to play smoothly, shouldn’t it ? Video is Intel’s "series 4" integrated chipset — again, not a speed-daemon, but it should be adequate... Support for Intel’s VA API is included.

  I build ffmpeg-4.1 from source using FreeBSD port. As you can see, the port has a maddening amount of options — including several different ones for the 264-codec.

  Any suggestions for improving the decoding speed to the point, where it is watchable by a human ? Thank you !