Hi, I downloaded a show from the BBC iplayer. I had been advised to
expect a frame rate of 50 fps hence a high bit rate.
Duration : 58 min 58 s
Source duration : 58 min 58 s
Bit rate : 2 619 kb/s
Maximum bit rate : 2 734 kb/s
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 50.000 FPS
I don't know whether I am expecting too much. I would like to lower the
frame rate and hence the bit rate while keeping other video aspects the
same. I decided to ramp down to 25 fps. The first attempt changed height
& width so I added the "-vf" qualifier. This is me clutching at straws
so time to seek assistance.
ffmpeg -i file -r 25 -vf "scale=960:540" output
This gives me:
Duration : 58 min 59 s
Bit rate : 854 kb/s
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
I was expecting the bit rate to drop but that seems a huge drop. Is this
to be expected? Is there a recommended path to lower the frame rate?
Cheers
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