[FFmpeg-user] Scaling legal video levels

Carl Eugen Hoyos ceffmpeg at gmail.com
Fri Feb 17 11:08:40 EET 2017

2017-02-17 2:39 GMT+01:00 Elliott Balsley <elliottbalsley at gmail.com>:
> I am trying to convert a single-frame H.264 MKV to a JPEG image.
> Unfortunately the output is always clipped at 235.

> The source video is full-range

FFmpeg does not detect full-range video (video_signal_type_present_flag
is 0, the default is limited-range), both FFmpeg and the reference
decoder report a broken h264 frame (different warnings are shown).

Which encoder created the frame and which decoder shows

Carl Eugen

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