diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h index 7128a83148..d1df5b4168 100644 --- a/libavcodec/avcodec.h +++ b/libavcodec/avcodec.h @@ -1315,8 +1315,20 @@ typedef struct AVCodecContext { int frame_number; ///< audio or video frame number /** - * Number of frames the decoded output will be delayed relative to - * the encoded input. + * Encoder delay. + * + * Video: + * Number of frames the decoded output will be delayed relative to the + * encoded input. + * + * Audio: + * Number of "priming" samples added to the beginning of the stream + * during encoding. The decoded output will be delayed by this many + * samples relative to the input to the encoder. Note that this field is + * purely informational and does not directly affect the pts output by + * the encoder, which should always be based on the actual presentation + * time, including any delay. + * * - encoding: Set by libavcodec. * - decoding: unused */