FFmpeg有两个存储帧数据的结构体,其中AVPacket是解封装后保存压缩数据包,AVFrame是解码后保存音视频帧。 AVPacket结构体以前放在avcodec.h头文件中,在FFmpeg4.4以后放在单独packet.h头文件。官方对AVPacket的说明如下: /** * This structure stores compressed data. It is typically exported by demuxers * and th...
AVFrameSideData **side_data; int nb_side_data; /** * @defgroup lavu_frame_flags AV_FRAME_FLAGS * @ingroup lavu_frame * Flags describing additional frame properties. * * @{ */ /** * The frame data may be corrupted, e.g. due to decoding errors. */ #define AV_FRAME_...
AVFrame结构体一般用于储存原始数据(即非压缩数据,例如对于视频来说YUV,RGB ,对于音频来说是PCM),此外还包括一些相关的信息,比如说,解码的时候储存了宏块类型表,QP表,运动矢量表等数据,编码的时候也储存了相关的数据,因此在使用FFmpeg进行码流分析的时候,AVFrame是一个很重要的结构体 文件路径在`libavutil \frame....
* AVFrame must be freed with av_frame_free(). * * AVFrame is typically allocated once and then reused multiple times to hold * different data (e.g. a single AVFrame to hold frames received from a * decoder). In such a case, av_frame_unref() will free any references held by * ...
AVFrame结构体中有不少成员,常见的成员以下所示,注释已替换:post typedef struct AVFrame { #define AV_NUM_DATA_POINTERS 8 uint8_t *data[AV_NUM_DATA_POINTERS]; //存储原始帧数据(视频的YUV, RGB, 音频的PCM),数组的每个元素是一个指针,指向了AVBufferRef *buf中的data ...
* for AVFrame can be obtained from avcodec_get_frame_class() */ typedefstructAVFrame{ #define AV_NUM_DATA_POINTERS 8 /** * pointer to the picture/channel planes. * This might be different from the first allocated byte * * Some decoders access areas outside 0,0 - width,height, pleas...
int interlaced_frame; int top_field_first; int palette_has_changed; int64_t reordered_opaque; int sample_rate; uint64_t channel_layout; AVBufferRef *buf[AV_NUM_DATA_POINTERS]; AVBufferRef **extended_buf; int nb_extended_buf; AVFrameSideData **side_data; ...
AVFrame的定义如下: typedef struct AVFrame { #define AV_NUM_DATA_POINTERS 8 /** * pointer to the picture/channel planes. * This might be different from the first allocated byte * * Some decoders access areas outside 0,0 - width,height, please ...
AVFrameSideData**side_data;int nb_side_data;//边缘数据和数目/** * @defgroup lavu_frame_flags AV_FRAME_FLAGS * @ingroup lavu_frame * Flags describing additional frame properties. * * @{ */#defineAV_FRAME_FLAG_CORRUPT(1<<0)//标记需要解码但不应该输出的帧的标志。帧数据可能被损坏,例如...
AVFrameSideData**side_data;intnb_side_data;#defineAV_FRAME_FLAG_CORRUPT (1 << 0)#defineAV_FRAME_FLAG_DISCARD (1 << 2)intflags;enumAVColorRangecolor_range;enumAVColorPrimariescolor_primaries;enumAVColorTransferCharacteristiccolor_trc;enumAVColorSpacecolorspace;enumAVChromaLocationchroma_location;...