ffmpeg 中copy 参数表示不对源媒体进行转码，保留原始编码方式 m4a是音频封装（BOX），能封装mp3/aac编码...
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Most audio codecs support a finite number of formats, each of which is enumerated by the codec and can be accessed using the methods of IWMCodecInfo. Video codecs, on the other hand, provide only a single format. This is because video streams have variables, like frame size, that are ...
若要设置此属性,请调用IMFAttributes::SetUINT32。 适用于 IMFMediaType 备注 此属性适用于通过 USB 传输的 H.264 流的媒体类型。 该值对应于 UVC 1.2 H.264 视频格式描述符中的bMaxCodecConfigDelay字段。 此属性还与H.264 UVC 1.5 相机编码器一起使用。
The deblocking for chroma block edges is disabled and that the two stage deblocking filter process is used for luma block edges of the slice: After filtering all block luma block edges that do not coincide with slice boundaries (as if disable_deblocking_filter_idc ...
WARNING: The wire and metal parts of this product can expose you to lead, a chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. This warning is posted because of the legal requirements of the State of California. For more informat...
int frame_number; int thread_count;...AVRational time_base; //时间的基准单位 unsigned char *extradata;//扩展数据,如mov 格式-> audio trak ->aac -> esds...AVCodec AVCodec 是类似 COM 接口的数据结构,表示音视频编解码器,着重于功能函数. next 成员用于把所有支持的编解码器连接成链表,便于遍历查找...
In this mode, if maxBitRate is set, it will form an upper bound on the actual bitrate. Therefore, if maxBitRate is set too low, the bitrate may become constrained, resulting in the desired target quality possibly not being achieved. 3.8.4. Multi pass frame encoding When determining the ...
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