Why does setting the bitrate with ffmpeg has no affect on the filesize?

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Asked 1 month ago

Modified 1 month ago

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I am trying to lower the bitrate of a video using ffmpeg to 1000 bits/s and 500 bits/s using the commands

ffmpeg -i __temp__.mp4  -vf "scale=-2:360" -b:v 1000 out_1000.ts
ffmpeg -i __temp__.mp4  -vf "scale=-2:360" -b:v 500 out_500.ts

but the output files seem to have the same size:

-rw-rw-r-- 1 alex alex 8160140 Nov  2 13:11 out_1000.ts
-rw-rw-r-- 1 alex alex 8160140 Nov  2 13:11 out_500.ts

What is going on?

asked Nov 2 at 12:14

Alex

1011 bronze badge

1

1000 bits/s is absurdly low - maybe not even enough to form all the syntax elements of a coded bitstream. Maybe you meant 1000k.
– Gyan
Nov 2 at 16:09
Yes I know it is low. I meant 1000, not 1000k.
– Alex
Nov 3 at 6:29

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