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• Stop ffmpeg rtmp live stream without cutting off video

  30 juillet 2018, par Geige V

  I can stream fine using the command

  ffmpeg -f alsa -ac 2 -i hw:0,0 -f x11grab -framerate 30 -video_size 1280x720 \
-i :0.0+0,0 -c:v libx264 -preset veryfast -maxrate 1984k -bufsize 3968k \
-vf "format=yuv420p" -g 60 -c:a aac -b:a 128k -ar 44100 \
-f flv rtmp://live.twitch.tv/app/<stream key="key"></stream>

  Platforms generally have a delay of 10 seconds for viewers. When I terminate the ffmpeg command, the stream ends immediately for the viewers and they miss the last 10 seconds of video.

  How can I terminate the stream without the end of the video cutting off abruptly ?

• recording live video stream from tv card using ffmpeg in windows

  23 septembre 2015, par user2688423

  I want to capture thumbnail every 1 second from tv card(tv signal) using ffmpeg in windows.

  first of all, to record live video from tv card, I tried below.

  ffmpeg -f dshow -i video="SKYTV HD USB Maxx Video Capture" -r 20 -threads 0 D ://test.mkv

  But it didn’t work.
  the Error message is

  "[dshow@000000000034d920] Could not run filter
  video=SKYTV HD USB Maxx Video Capture : Input/output error"

  I use the device called ’SKYTV HD USB Maxx Video Capture’ for getting tv signal(TV card).

  (people usually suggest "ffmpeg -f oss -i dev/dsp -f video4linux2 -i dev/video0/tmp/out.mpg"
  but I dont think it works at window. this is the error message i got : "Unknown input format: 'video4linux2'")

  what should i do to record live video and get thumbnail every 1 second from tv card(tv signal) using ffmpeg in window ?

  Please help..!

• Recording live stream with intermittent no audio with FFmpeg

  15 décembre 2022, par charlie-bird

  I'm trying to record a live stream with ffmpeg and having an issue with the audio.
The stream has video and audio, until it goes to video only for a few minutes and back to audio+video.
  
A : XXXXXX________YYYYYY_______ZZZZZZ
  
V : XXXXXXOOOOO0YYYYYYOOOOOZZZZZZ
  

  


  When I stop the recording and look at the output file, the absence of audio is messing stuff up. Instead of having no audio during the "breaks" ffmpeg wrote the audio track from after the break over the video, completely disconnecting audio and video
  
A : XXXXXXYYYYYYYZZZZZZZZZ
  
V : XXXXXXOOOOOOOOYYYYYYOOOOOOOZZZZZZ
  

  


  Is there an argument or parameter to force the recording of an "empty" audio track over the video when there's no audio, to keep both in sync ?

  


  Right now, not using any options

  


  ffmpeg -i "https://input.m3u8" ~/Outputfile.mp4


  


  Tried with map as below, same issue

  


  ffmpeg -i "https://input.m3u8" -map 0:a -map 0:v ~/Outputfile.mp4


  


  EDIT :
Also tried with a simple copy, in that case the audio stops but then isn't recorded when it comes back

  


  ffmpeg -i "https://input.m3u8" -map 0:a -map 0:v -c copy ~/Outputfile.ts


  


  EDIT 2 :
I've found a workaround. I re-stream the live stream using VLC on a local port and record copy with ffmpeg, and now it's all in sync

  


  ffmpeg -i "http://10.10.10.10:1234" -c copy ~/Outputfile.ts


  


  I would still like to be able to do this directly, but in the meantime that works.