[BUG]rpicam-vid file name splitting / segmentation does not work

[Kletternaut]

Describe the bug

rpicam-vid -t 100000 --segment 10000 -o chunk%04d.h264
does not work, it creates one file named chunk%04d.h264

Like described in the documentation here
Examples:
rpicam-vid -t 100000 --segment 10000 -o chunk%04d.h264
should records a 100 second file in 10 second segments, where each file includes an incrementing four-digit counter padded with leading zeros: e.g. chunk0001.h264, chunk0002.h264, etc

`rpicam-still --version

rpicam-apps build: v1.6.0 6106d93 04-04-2025 (16:14:10)

rpicam-apps capabilites: egl:1 qt:1 drm:1 libav:1

libcamera build: v0.4.0+53-29156679
`

[naushir]

Is this running on a Pi5? If so, unfortunately, because of the use of libav for video encoder, these features are not currently implemented.

[Kletternaut]

Yes, it's on a Raspberry Pi 5. I was just wondering if I'm too stupid to find the correct parameters. A small hint in the documentation might save some users a lot of time, right?!

[naushir]

Sorry, I should have clarified - the functionality did exist for the libav backend, but was buggy and unreliable. So we've removed it temporarily until we can revisit and implement it correctly.