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• How I can merge ts stream to write ut100c realtime [on hold]

  21 juin 2019, par Randy Firfield

  I am using ut100c device for dvbt transmit.
  For create ts file in realtime, I tried using ffmpeg.

  ./ffmpeg.exe -y -re -i http://ukiptv.ddns.net:8000/content/23HjeuPQrf/234 -i http://ukiptv.ddns.net:8000/content/23HjeuPQrf/233 -map 0:0 -map 0:1 -map 1:0 -map 1:1 -program program_num=1:st=0:st=1 -program program_num=2:st=2:st=3 -c copy out5.ts

  Also, I tryed with https://github.com/linuxstb/dvb2dvb
  But, there is main problem for multiple videos.

  There is main problem in this code
  https://github.com/linuxstb/dvb2dvb/blob/master/dvb2dvb.c#L567
  They are select next video stream with the most urgent packet (i.e. earliest bitpos).
  But, this almost select only one url, and other urls are selected more fewer.
  Also, there is no mentioned for PTS.
  So, audio/vidoe sync is not good in this project.

  Using ffmpeg, this cannot create TS stream with realtime.
  I want to write my own muxer with c language.

  Is there any library ?
  How I can start without ffmpeg ?
  Or, is there upgrade the ffmpeg performance ?

  Or How i can upgrade https://github.com/linuxstb/dvb2dvb ?

• nested loop in bash shell

  17 juin 2015, par Tareq Suheimat

  I want to stream video using ffserver and then receive and download it using ffmpeg but first I want to add some noise to the link using netem and the wanted noise will be Bit error,so for the transmitter side there’s no problem the problem is at the receiver side
  so the first loop must contain the percentage numbers of the bit error like 0.2 0.4 0.6 0.8 and do the following command :

  tc qdisc change dev eth0 root netem corrupt 0.1%

  then for each one of the bit error values must repeat it for 10 times and for each try I must download the received video using the following command :

  ffmpeg -i rtsp://localhost:7654/test1-rtsp.mpg -acodec copy -vcodec copy output.mp4 

  so later I end up with too many videos to compare them later.

  please people help me it’s urgent !!!

  tell now I have this scratched code but I don’t know how to compile it together

  for i in {0.2 0.4 0.6 0.8}
  
  do
  
      tc qdisc change dev eth0 root netem corrupt ${i}%
  
  
  
      #(must repeat for each i the ffmpeg download command 10 times)
  
  
  
      #The download command
  
      for x in {1..N}
  
      do
  
          ffmpeg -i rtsp://localhost:7654/test-rtsp.mpg -acodec copy -vcodec copy tested${x}.mp4
  
      done

• How do I use FFMPEG binary file in a commercial app (AdobeAir) ?

  8 mars 2019, par Maxim Firsoff

  I have a multi-platform app (MacOS, Windows), based on AdobeAir framework for encoding video.

  1. I’m using FFMPEG as a standalone executable file
  2. I’m accessing to FFMPEG via CLI (command line interface)
  3. I have not modified FFMPEG build file (just downloaded from official site).

  I’ve read http://ffmpeg.org/legal.html and most care about the #2 step, AdobeAIR isn’t supported dynamic linking, how can I solve it ?