FFMPEG conversion gone very wrong

[SM1872]

I have an image sequence which I'm trying to encode as 50fps, but it's coming out as 25fps with the video twice as long as it should be.

Can some intelligent sort diagnose the error in my command line?

Normally I do 25fps, and I've just tried to guess my way around it. Looking for video bitrate of 5000, so I assume that's one part needing changed. However I can't work out why the video is just jerking along at 25fps and half the speed it should be.

ffmpeg -i c:\video\bs\%06d.tif -vf scale=970:720 -level 4.1 -r 50 -b_strategy 2 -8x8dct 1 -fast-pskip 0 -pix_fmt yuv420p -bf 15 -b-pyramid normal -me_method umh -subq 11 -me_range 64 -mbtree 1 -rc-lookahead 250 -keyint_min 50 -direct-pred auto -partitions all -trellis 2 -mixed-refs 1 -aq-mode 1 -aq-strength 1.15 -deblock -1 -vcodec libx264 -profile:v high444 -refs 12 -vb 2500k -maxrate 6250k -bufsize 7812k -preset veryslow -pass 1 -an pass1.mkv

[jagabo]

You want to put -r 50 before -i..., not after. Otherwise ffmpeg will assume 25 fps for the input then double it (by duplicating each frame) to 50 fps for the output.

[SM1872]

Thank you, Jagabo.