X video 5,000 kbps recommendation: Sume trim has no bitrate field

X recommends H264 High Profile, 30 or 60 FPS, a minimum video bitrate of 5,000 kbps and AAC LC audio at 128 kbps. Sume trim has no bitrate field and refuses encoder fields such as codec and crf; what you control is fps (24, 25, 30 or 60) and the output width and height.

X numbers are as written on its Media best practices page, read 2026-10-01. Sume facts are from Video trim.

What does X recommend?

The recommendations are marked as recommendations, not requirements. The same page's per-size table lists 2048K video and 128K audio for 1280 by 720, which differs from the 5,000 kbps minimum line, so read both before treating one number as a hard limit.

What can Sume trim control?

The program table offers precision, audio (keep or drop), and output as { width, height, fps }, exact precision only. Width and height run 256 to 2160, and fps takes 24, 25, 30 or 60. Kept audio from an exact trim is remuxed as AAC.

Can I ask for a bitrate anyway?

No. The refusal table says a client that sends vf, filter, ffmpeg, cmd, codec, crf or similar gets ffmpeg_fields_rejected, because the server compiles ffmpeg itself. The docs show no bitrate field at all.

What should I do about the bitrate recommendation?

Conform fps to 30 or 60 and a size X lists, then probe the file for its bitrate and compare with what X recommends. If you need an exact bitrate, encode outside Sume. See trim and conform in one call for the supported options.