Converting FLV for Oppo BDP

Hi all,
This is my first go at video conversion.
I have an FLV video file that I would like to play via DLNA on my Oppo BDP 93 (tried USB as well). The MediaInfo analysis of the file is attached (1.txt).
The Oppo does not play FLV natively, so I have converted the file to mp4 using ffmpeg (ffmpeg -i 1.flv -vcodec copy -acodec copy 1.mkv). This worked fine and the file plays on the oppo in principle, but it it stutters every second or so.
The file is 25fps and the Oppo does not play 25fps, it converts to 24fps, which would explain the stutters. I tried setting the Oppo to PAL only, which makes it convert the file to 50fps on playing, but the stutter is still there.
Is there an easy way (I'm not an expert) to convert the file to 50fps (seems a simple doubling of each frame) without quality loss, so that it would play natively at 50fps on the Oppo, hopefully without stuttering?
Or is there another suggestion what I could try?
Thanks a lot for any help
Rudi

Attached Files

• 1.txt (2.3 KB)