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• H264 keyframe issue with RTP

  3 septembre 2015, par Mat DePasquale

  I’m building an RTP encoder for H264 video. The video data provider doesn’t periodically stream the keyframe in the data, instead they have provided me with a binary file representation of the keyframe. This includes the SPS-PPS-SEI and then 8 slices of the i-frame.

  Since I am encoding RTP, I need to rebroadcast this keyframe at 2 second intervals. I am doing that in my code, along with the rest of the data as it comes in. I am using ffmpeg to connect to the RTP data via a UDP socket for display testing.

  I am noticing that every 2 seconds, the video seems to blank and resync itself, pixelate, etc. Obviously, this is highly undesirable in the video product. I’ve been trying to debug this for quite some time and the only thing I can determine is that it has to do with the keyframe. If I just send the keyframe once, and then the rest of the data, ffmpeg displays the video fine. But in a network environment, I need to send the keyframe at periodic intervals.

  Does anyone have an idea as to why this resyncing of the video happens and most importantly, how to stop it from happening ?

  Thanks !

• How do I fix HTTP 404 error message using FFMPEG command ? [on hold]

  18 décembre 2018, par Noob

  I am trying to download a video from this site (https://ffmovies.ru/film/night-school.kk6y4/16qmpp) and have tried using ffmpeg but it always returns an "HTTP Error 404 Forbidden." I’ve also tried using the wget command to consolidate all the ts files but that didn’t work either (I get the same error message). I am not on expert in this and was hoping someone out there can help me fix this problem. Here is the ffmpeg code that I inputed :

  ffmpeg -i https://cdn.mcloud.to/stream/sf:i0:q2:h5:p23:l1/vtYB9rGpyklG1sxXqgdmXg/1545238800/g/9/b/pj11w4/hls/480/480.m3u8 -c copy -bsf:a aac_adtstoasc output.mp4

  I have also attached a picture of the error message for reference. I really appreciate someone showing me what I am doing wrong.

  Cheers.

• FFMPEG how do i add 1 image to 1 video

  15 avril 2020, par das

  ok I found a code online from 1 of the StackOverflow page tested it and it adds 10 seconds black screen before the video starts.
  
Summary
  
i have 55.mp4 and logo.png i want to replace black screen with png logo

  



  ffmpeg -i 55.mp4 -filter_complex "[0:v]tpad=start_duration=10:color=black[v];[0:a]adelay=10000|10000[a]" -map "[v]" -map "[a]" -y out2222.mp4


  



  I have logo.png in the same path how do I use that instead of black screen.
  
I do not wish to use overlays. I want it as it is, just replace black-screen with my png