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• ffmpeg concat mp4 files doesn't work properly on AWS Lambda

  31 octobre 2017, par saa

  I’m trying merge two mp4 files with ffmpeg :

  ffmpeg -i audio.mp4 -i video.mp4 -c copy output.mp4

  Locally it works good. But on AWS Lambda it doesn’t work properly, ffmpeg merged only first 4-5 seconds of audio.mp4 and rest part of output.mp just video without audio. How can I fix that ?

• How to use FFMPEG for a whole directory ? (Example code i found on a different thesd doesn't work for me) [closed]

  17 juillet 2020, par TrainNutter

  I have discovered that FFMPEG is a thing and I'm wondering how i can compress many files in 1 bat file execution and that the newly compressed filed keep the same name as the Raw files and subsiquently replace the raw file in MP4 format

  


  I am wondering this as i have over 700GB of Raw videos spanning over 3+ years of recording youtube videos (just for fun) and that my 2TB hard drive is now almost full lol

  


  I Tried using this example but it didn't work for some reason

  


  for i in *.mp4;
    do name=`echo "$i" | cut -d'.' -f1`
    echo "$name"
    ffmpeg -i "$i" "${name}.mp4"
done


  


  Edit : I am using Windows 10

  


• udpsrc doesn't work on 2 NIC & Port mirror linux setup (gstreamer/vlc/ffmpeg)

  28 janvier 2021, par kepitto

  I've tried a lot of stuff, but I can't seem to get it to work. (Same problem exists with ffmpeg/vlc)

  


  Basically, I can't get the UDP Stream directly into a videotool. I can verify the data coming in through tcpdump/wireshark etc. and i can also create the videofiles through gstreamer/ffmpeg afterwards, but I can't use the udp source as input.

  


  The current setup is the following :
The camera streams MJPEG through UDP to a fixed address & port. I port mirrored the data from the camera, so that I can verify the data coming in through wireshark on a 3rd device.

  


  The reason behind doing this is that multicast is not supported, so I need a way to get the data on 2 devices through unicast. Port mirroring seemed like a viable solution.

  


  Am I missing something here ? What do I need to do to get this working ?
I thought maybe it's due to the two networkinterface setup as I use 1x usb to ethernet for the port mirror and 1x ethernet for the web, but disconnecting the other shows no difference.
The routing seems correct too : "ip route get camera.ip" returns that the routing is through the usb to ethernet on my static ip.

  


  Example of an attempt :

  


  Gst-launch-1.0 udpsrc port=streamingport(confirmed through wireshark) ! jpegdec ! videorate ! video/x-raw,framerate=30/1 ! autovideosink (does not work)

  


  Gst-launch-1.0 filesrc location=hexdumpfile.txt ! jpegdec ! videorate ! video/x-raw,framerate=30/1 ! autovideosink (does work)