You must use the English language in a bug report. If you do not speak English please use a translation service instead of trying your best to write English. Thank you What is your operating system? macOS Tahoe, Macbook Pro M2 and M4 What is your Shotcut version (see Help > About Shotcut)? 26.1…

It looks like I relaxed the strictness of this when I made a recent change in version 25.10 for the following bug: [image] Shotcut does not respect bf property from export profile Bug Like title says, Shotcut does not respect bf (B frames) property in export p…

As you had previously suggested: changed B frames to 0 and it works.

That’s also interesting for me. Can you tell me what “B frames to 0” is or how to change this setting? Thank you

Thank you very much :folded_hands:t2:

I was pulling my hair out trying to figure out why the Toolbox encoder kept failing after the update. Manually setting B frames to 0 under the Export > Codecs tab fixed it immediately.

It does default to 0 B frames when that is turned on (at least on startup), but it does not strictly enforce it, and it possible through some presets or certain sequences of clicks to alter the default. Also, HEVC on VideoToolbox supports B frames on my Macs.

Shotcut Forum

macOS: Use hardware encoder failing

Bug

monish February 3, 2026, 9:17pm 4

MacOS update broke h264_videotoolbox export Bug

I found that the root cause of this problem is simple: Export > Codecs > B frames must be 0. I made a fix for the next version 25.07 to set this automatically for you. As a workaround simply change it manually.

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