2.结构体定义 1typedefstructAVOutputFormat {2constchar*name;3/**4* Descriptive name for the format, meant to be more human-readable5* than name. You should use the NULL_IF_CONFIG_SMALL() macro6* to define it.7*/8constchar*long_name;9constchar*mime_type;10constchar*extensions;/**< c...
SDL_Init():主要是初始化内存等; SDL_SetVideoMode():设置显示模式,创建 SDL 窗口,并指定图像尺寸及像素个数; SDL_Surface:是一种图片数据类型,包含了图片的全部像素点,以及渲染这张图片需要的其它数据; SDL_CreateYUVOverlay():创建画布对象; SDL_Overlay:用于显示YUV数据; SDL_DisplayYUVOverlay():让 SDL 来渲...
* AVSTREAM_INIT_IN_INIT_OUTPUT on success if the codec had already been fully initialized in avformat_init, * negative AVERROR on failure. * * @see av_opt_find, av_dict_set, avio_open, av_oformat_next, avformat_init_output. */ av_warn_unused_result int avformat_write_header(AVFormat...
enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_NONE}; ret = av_opt_set_int_list(buffersink_ctx, "pix_fmts", pix_fmts, AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN); if(ret < 0) { RLOG_E_("set output pixel format failed,err=%d", ret)...
在文件avformat.h中,第1350行中,结构体AVFormatContext中有:struct AVOutputFormat *oformat,注释中写: The output container format. Muxing only, must be set by the caller before avformat_write_header(). AVFormatContext的初始化可以用: AVOutputFormat *av_guess_format(constchar*short_name,constchar*filena...
* AVStream parameters that need to be set before packets are sent. * This method must not write output. * * Any allocations made here must be freed in deinit(). */int(*init)(structAVFormatContext*);/** * Deinitialize format. If present, this is called whenever the muxer is being ...
Alias: setStartTime().Seeks an input and only start decoding at given time offset. The time argument may be a number (in seconds) or a timestamp string (with format [[hh:]mm:]ss[.xxx]).ffmpeg('/path/to/file.avi').seekInput(134.5); ffmpeg('/path/to/file.avi').seekInput('2:...
* an output media file. * * @param s Media file handle, must be allocated with avformat_alloc_context(). * Its oformat field must be set to the desired output format; * Its pb field must be set to an already opened AVIOContext. ...
D aa Audible AA format files D aac raw ADTS AAC (Advanced Audio Coding) DE ac3 raw AC-3 D acm Interplay ACM D act ACT Voice file format D adf Artworx Data Format D adp ADP D ads Sony PS2 ADS E adts ADTS AAC (Advanced Audio Coding) ...
= Paletted format ...B = Bitstream format 1. 2. 3. 4. 5. 6. yuv420p 分辨率格式 : NB_COMPONENTS = 3 表示该分辨率格式有 3 3 3 个成分 , 分别是 Y 分量 , U 分量 , V 分量 ; BITS_PER_PIXEL = 12 表示每个像素点平均下来有多少比特构成 , 12 12 12 比特是 1.5 1.5 1.5 字节;...