My server uses this command to stream a video (1280x544):

ffmpeg -re -i c:\ffmpeg\This.mp4 -vcodec copy -acodec copy -movflags faststart -f mpegts tcp://

Now, I would like to reduce the original resolution while streaming. I tried this:

ffmpeg -re -y -i this.mp4 -vf scale="480:-1" this480.mp4 -vcodec copy -acodec copy -movflags faststart -f mpegts tcp://

but the resolution does not change.

Can this be done or I am asking the impossible? Thanks.

1 Answer 1


You wanted to resize your video (-vf scale="480:-1"), and at the same time you wanted don't to use a video codec for encoding such resized video (-vcodec copy).

It's impssible — video codec copy means no decoding, no encoding, no filtering - simply copying without any change. It is not a real codec.

Try omitting -vcodec copy to enable FFmpeg to choose an appropriate codec.

  • OK thanks. Based on your comments, I was able to resize and to live stream using: ffmpeg -re -i this.mp4 -vf scale="480:-1" -movflags faststart -f mpegts tcp://
    – moster67
    Aug 25, 2019 at 21:47

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.