0
votes
0answers
91 views

FFmpeg/Avconv: Scaling Filter “Error when evaluating the expression”

I'm trying to scale a video with FFmpeg with the following command: ffmpeg -i input.jpg -vf scale="'if(gt(a,4/3),320,-1)':'if(gt(a,4/3),-1,240)'" output_320x240_boxed.png This is taken verbatim ...
0
votes
0answers
67 views

Automated avconv recordings script

I'm currently recording video from my IP camera to disk by making use of avconv (ffmpeg). avconv -i rtsp://192.168.1.1/stream -c copy pool.mp4 This works great as my feeds are already h264, I ...
1
vote
2answers
267 views

Bash script to extract audio from video

I have written this little script to batch extract audio from video using avconv. It was working fine, but strangely it doesn't work anymore (since I have changed the codec from aac to mp3). The ...
2
votes
1answer
609 views

imagemagick image conversion piped in avconv fails

I am trying to write a script that should take all sort of images (format, size...) and create a video with avconv. I've managed to make it work with a series of jpg (all the same size though) and I'm ...
3
votes
1answer
543 views

A way to capture error output from ffmpeg/avconv in a bash script

I am trying to batch convert a bunch of files and i am doing an simple listing of the converted files to a text document so that i can stop the script and continue from approximately were i started. ...