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• How to split multiple audio files by 10 seconds each on OSX ?

  23 juin 2020, par LA_

  Let's say I have 100 audio files and I would like to split each file into several files with 10 seconds length.

  


  I think the following should work :

  


  for i in *.ogg; do
  echo -n $i ...
  ffmpeg -i $i.ogg -ss 0  -t 10 $i_1.ogg
  ffmpeg -i $i.ogg -ss 10 -t 10 $i_2.ogg
  ffmpeg -i $i.ogg -ss 20 -t 10 $i_3.ogg
done


  


  But I don't understand how many times ffmpeg commands should be repeated.

  


• FFmpeg uses too much memory when repeating split, select, overlay

  13 novembre 2020, par finefoot

  I'm running

  


  ffmpeg -i input.mp4 -filter_complex_script script.txt output.mp4


  


  with the following minimal example script :

  


  split[tmp],
select='between(t,1,2)',
select='between(n,0,1)',
[tmp]overlay=enable='between(t,1,2)':eof_action=repeat,
split[tmp],
select='between(t,3,4)',
select='between(n,0,1)',
[tmp]overlay=enable='between(t,3,4)':eof_action=repeat


  


  What I want to do is to take 1 frame at a certain position and repeat it for a certain duration, basically "pausing" the video, while overwriting to keep the same output length. In the example, I'm doing this twice : I'm using split[tmp] to get a second input stream to work on, select the time at position 00:01 with select='between(t,1,2)', select the first frame from that position with select='between(n,0,1)' and finally overlay that frame over the input. This repeats for a second time at position 00:03. I have tested this and it does exactly what I'm looking for.

  


  However, in my real script, I'm repeating this about 1000 times for different positions in the stream (and for shorter durations than 1 second) which results in running out of memory. What am I doing wrong ? What can I do to optimize ?

  


• Publishing an RTSP stream from my IP camera to a remote MediaMTX / RTSP Simple Server using FFmpeg and Azure [closed]

  28 janvier 2024, par cmd

  Using FFmpeg, I am trying to publish the RTSP stream from my IP camera to an Azure VM running a MediaMTX instance https://github.com/bluenviron/mediamtx. My intention is for the stream to be accessible from other remote connections by connecting to the VM.

  


  I was able to setup a local MediaMTX server on my laptopm, and publish the stream using this FFmpeg command :

  


  ffmpeg -i rtsp://<camera username="username">:<camera password="password">@<camera local="local" ip="ip">:554 -c:v copy -c:a copy -f rtsp rtsp://<laptop local="local" ip="ip">:8554/stream/mystream&#xA;</laptop></camera></camera></camera>

  


  This worked fine, as I was able to connect to the MediaMTX server in VLC player to view the stream. However, I have setup an Azure VM running Windows 10, and run the same MediaMTX instance on it. I have attempted to publish the RTSP stream from the IP camera using the same command, but with the Laptop IP replaced with the address of the VM, but this doesn't work.

  


  I have disabled the Windows Firewall on my laptop and the VM, but the stream can still not be published. I have also tried the same approach by running the MediaMTX server on my friend's computer on his network, and adding the necessary port forwarding rules to his router. I am unable to edit any rules on the router where I am living however.

  


  What else might be causing this issue, and is there any way to publish the IP camera's RTSP to a remote server where it could then be read ?