On 08/07/2017 11:55 PM, Mark Thompson wrote:
would you know where can I get this information from (qmin/qmx for the other
encoders)?
From the relevant language standards.
H.263 / MPEG-4 part 2: [1, 31] (<https://www.itu.int/rec/T-REC-H.263>:
PQUANT, GQUANT.)
H.264 / MPEG-4 part 10 / AVC: [48 - 6 * bitdepth, 51]
(<https://www.itu.int/rec/T-REC-H.264>: QpBdOffsety, pic_init_qp_minus26,
slice_qp_delta.)
H.265 / MPEG-H part 2 / HEVC: [48 - 6 * bitdepth, 51]
(<https://www.itu.int/rec/T-REC-H.265>: QpBdOffsety, init_qp_minus26,
slice_qp_delta.)
VP8: [0, 127] (<https://tools.ietf.org/html/rfc6386>: q_index.)
VP9: [0, 255]
(<https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp9-bitstream-specification-v0.6-20160331-draft.pdf>:
base_q_idx.)
ah thanks a lot.
btw, how come that that this information is not already present in some
ffmpeg table?
Just trying to decide if I should just import the relevant data into the
v4l2_m2m_enc file or somewhere else?
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