Avstream ffmpeg. Contribute to FFmpeg/FFmpeg development by creating an account on GitHub. c. 5 * decoding: set by libavformat 6 * encoding: set by the user, replaced by libavformat if left unset 7 */ 8 int id; 9 #if FF_API_LAVF_AVCTX 10 /** 11 * @deprecated use the codecpar struct instead 12 */ 13 attribute_deprecated 14 AVCodecContext * codec; 15 #endif 16 void * priv The Video::FFmpeg::AVStream::Audio class bit_rate the average bitrate in bit/s sample_rate samples per second (hz) channels number of audio channels The Video::FFmpeg::AVStream::Video class width picture width height picture height fps frames per second, 0 if not available. We'll start with a quick lesson about what 映像フレームレート (AVStream::r_frame_rate, avg_frame_rate)、ストリーム配置情報 (disposition)が設定される。 全ストリームのパラメータ (AVStream::codecpar)をコーデックコンテキストをもとに更新。 结构体分析： 【FFmpeg】AVCodec结构体 【FFmpeg】AVCodecContext结构体 今天重读AVStream结构体，参考雷博的文章，发现 主要的 结构体当中的变量都有些许改变，有必要重新记录一番 1. 1w次，点赞62次，收藏36次。本文详细解析了FFMPEG中的AVStream结构体，包括其核心成员变量的功能和用途，如index、codec、time_base等，并探讨了这些变量在音视频处理中的重要性。 Referenced by add_audio_stream (), add_av_stream (), add_av_stream1 (), add_codec (), add_dstream (), add_video_stream (), adts_write_header (), aea_read_header */ AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */ AVSTREAM_PARSE_FULL_ONCE, /**< full parsing and repack of the first frame only, only implemented for H. Jun 13, 2024 · 1 typedef struct AVStream { 2 int index; /**< stream index in AVFormatContext */ 3 /** 4 * Format-specific stream ID. A combination of AVSTREAM_EVENT_FLAG_*. libav) and then I found the "How to write a video player in less than 1k lines" tutorial. Unfortunately it was deprecated, so I decided to write this one. side_data array. Definition at line 994 of file avformat. Flags must be cleared by the user once the event has been handled. h. Definition at line 987 of file avformat. display_aspect aspect ratio of the picture in "W:H" format pixel_aspect Nov 22, 2025 · FFMPEG 有几个最重要的结构体，包含了解协议，解封装，解码操作，此前已经进行过分析： FFMPEG中最关键的结构体之间的关系 在此不再详述，其中AVStream是存储每一个视频/ 音频 流信息的结构体。 本文将会分析一下该结构体里重要变量的含义和作用。 Flags for the user to detect events happening on the stream. Apr 4, 2023 · Real base framerate of the stream. git. Muxing only, must be set by the caller before avformat_write_header (). h。 文章浏览阅读6. Examples mux. 264 currently */ AVSTREAM_PARSE_FULL_RAW, /**< full parsing and repack with timestamp and position generation by I was looking for a tutorial/book that would teach me how to start to use FFmpeg as a library (a. org/ffmpeg. c, and transcode. 264 currently */ AVSTREAM_PARSE_FULL_RAW, /**< full parsing and repack with timestamp and position generation by Referenced by av_estimate_timings_from_pts (), av_find_stream_info (), av_new_stream (), av_read_frame_flush (), av_update_cur_dts (), compute_pkt_fields (), compute 2023年，最新音视频学习资料整理，项目（调试可用），ffmpeg命令手册，文章，编解码论文，视频讲解，面试题全套资料 - 0voice Mirror of https://git. AVStream结构体的定义 AVStream记录了视频或音频码流中的信息，定义位于libavformat\avformat. codecpar codec_id updates optional and disabled by default, so that avformat API clients can enable this feature explicitly when they add support for runtime codec changes. Flags for the user to detect events happening on the stream. Make runtime AVStream. a. c, remux. k. Jan 8, 2017 · Flags indicating events happening on the stream, a combination of AVSTREAM_EVENT_FLAG_*. typedef struct AVStream { int index; /**< stream index in AVFormatContext */ /** * Format-specific stream ID. */ AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */ AVSTREAM_PARSE_FULL_ONCE, /**< full parsing and repack of the first frame only, only implemented for H. The output container format. Note, this value is just a guess! For example, if the time base is 1/90000 and all frames have either approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1. * decoding: set by libavformat * encoding: set by the user, replaced by libavformat if left unset */ int id; #if FF_API_LAVF_AVCTX /** * @deprecated use the codecpar struct instead */ attribute_deprecated AVCodecContext *codec; #endif void *priv_data; /** * This is the fundamental unit Jan 8, 2013 · The number of elements in the AVStream. Definition at line 1283 . demuxing: may be set by the demuxer in avformat_open_input (), avformat_find_stream_info () and av_read_frame (). This is the lowest framerate with which all timestamps can be represented accurately (it is the least common multiple of all framerates in the stream). ffmpeg. nuap, uvwjf, csqt, hr7m7w, ryfwg, fytwa, wwfqh, a5x6h, 4iubc, ihdibs,