What is the transcoding unit for FFMPEG

[Michael Rampe]

[atish kathpal] ” can we transcode a single file as user defined chunks of equal/variable size?”

yes but you will have to run one command for each chunk.

-t is a time offset
specified seconds or hh:mm:ss[.xxx]

-ss is the length to encode
specified seconds or hh:mm:ss[.xxx]
This option behaves differently if put before or after the -i [input]
Before:seeks to nearest I frame before converting (fast but inaccurate)
After:seeks through every frame until target is reached (slow but accurate)

So:
first chunk: -t 0 -ss 60
second chunk: -t 60 -ss 60
third chunk: -t 120 -ss 60
…..etc.

Michael