- * This side data contains an integer value representing the quality
- * factor of the compressed frame. Allowed range is between 1 (good)
- * and FF_LAMBDA_MAX (bad).
+ * This side data contains quality related information from the encoder.
+ * @code
+ * u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad).
+ * u8 picture type
+ * u8 error count
+ * u16 reserved
+ * u64le[error count] sum of squared differences between encoder in and output
+ * @endcode