fanbird2008的专栏

1. AVFormatContext 在 open_input_file / open_output_file中分配2. AVStream, AVCodecContext在 pmt_cb 中分配并设置pmt_cb:   st = avformat_new_stream(pes->stream, NULL);        avformat_new_stream:        

1. download crtmpserver source codesvn co --username anonymous --password "" https://svn.rtmpd.com/crtmpserver/trunk crtmpserver2. install cmake 3. install openssl dev libraryapt-get install

Unused ffmpeg for some time, I compiled ffmpeg without enable h264 parser due to negligence, this caused ffmpeg reported a lot of errors on decodingh264 raw video.  I wrote this information here i

!!!INFO!!! : Generated SDP is:- Length = 621 v=0o=- -2945270597747810228 -2945270597747664200 IN IP4 0.0.0.0c=IN IP4 0.0.0.0a=tool: RtpRtspServera=range:npt=0- m=video 0 RTP/AVP 96a=rtpm

1. after configure and compile ffmpeg, run ffmpegThe following error is reported.3rdparty/ffmpeg-2.1.3/ffmpeg: relocation error: /usr/local/ffmpeg/lib/libavfilter.so.3: symbol sws_isSu

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE := ffmpegLOCAL_SRC_FILES := ../libffmpeg.soinclude $(PREBUILT_SHARED_LIBRARY)include $(CLEAR_VARS)NDK_LIBDIR=/opt/android/ndk-

static inline int decode_vui_parameters(H264Context *h, SPS *sps){    int aspect_ratio_info_present_flag;    unsigned int aspect_ratio_idc;    aspect_ratio_info_present_flag = get_bits1(&h->gb

static void new_pes_packet(PESContext *pes, AVPacket *pkt){    av_init_packet(pkt);    pkt->buf  = pes->buffer;    pkt->data = pes->buffer->data;    pkt->size = pes->data_index;    if (pes

1.  ffmpeg -i film1.ts -f mpegts -an -c:v libx265 -f hevc fm.h265

example 1.  ./ffmpeg -f mpegts -i ../film1.ts -an -c:v libx264 -vf "subtitles=tt.srt" ff.ts

in /etc/profilePKG_CONFIG_PATH=/usr/local/ass-0.13.4/lib/pkgconfig:/usr/local/fdk-aac-0.1.4/lib/pkgconfig:/usr/local/ffmpeg-3.2/lib/pkgconfig:/usr/local/fontconfig-2.12.1/lib/pkgconfig:/usr/lo

将 aif 文件转换为 16 位有符号数，小端存储模式，8000 Hz 采样率：ffmpeg -i test.aif -f s16le -ar 8000 test.pcm将 44.1KHz 双声道 16 位有符号数小端存储的 PCM 数据编码为 AAC：ffmpeg -f s16le -ar 44100 -ac 2 -i test.pcm -acodec aac -strict

http://adec.altervista.org/blog/yuv-422-v210-10-bit-packed-decoder-in-glsl/?doing_wp_cron=1514628553.2152769565582275390625YUV 4:2:2 v210 10-bit packed decoder in GLSLPosted on 201

Uncompressed Y´CbCr Video in QuickTime Fileshttps://developer.apple.com/library/content/technotes/tn2162/_index.html#//apple_ref/doc/uid/DTS40013070-CH1-TNTAG8-V210__4_2_2_COMPRESSION_TYPE

1down votefavoriteI want to use fragment shader to convert RGB to YUV420P using shader.1，I figured out the coordinates of the current texture color.2，I calculated the 4 Y a

1. c:v  c:a  -- specifiy codec for video audio     -c:v mpeg4     -c:a libmp3lame2. b:v b:a  -- specify bitrate for video audio    -b:v 800k    -b:a 128k3. f  -- specify format for video

http://www.sunrayimage.com/faq.htmlHome/ FAQFrequently Asked Questions About YUVTools:What's sampling format ?What's interlace/progressive format?What's pixel

For 8 bit: Y range is [16..235] and U/V range is [16..240] For 10 bit: Y range is [64..940] and U/V range is [64..960] So shifting each component value 2 bits to right will provide correct con

1. ffmpeg-3.2 version2. ass./ffmpeg -i war.ts -vf ass=t1.ass -an -c:v libx264 -s 640x360 ff.ts

FFMPEG：请参考FFMPEG官方给出的编译向导：https://trac.ffmpeg.org/wiki/CompilationGuide/Android在此链接中有编译脚本的集合。下载后解压，将ffmpeg的源代码copy到解压缩目录的ffmpeg文件夹中。按照项目的github的主页上的说明步骤，就能顺利进行。需要注意的是：    1、脚本都是基于Ubunt

av_frame_alloc(), av_frame_unref() and av_frame_free() now can and should beused instead of avcodec_alloc_frame(), avcodec_get_frame_defaults() andavcodec_free_frame() respectively. The latter thr

1. define functions on relatvie modulefor example: libavformat moduleint ff_mpegts_parse(......){}2. export itedit libavformat/libavformat.v* file, add the functions you define into

1. normal file as inputffmpeg -i test3.264 -s 352x288 -pix_fmt yuv420p test31.yuv2. pipe as inputffmpeg -i /.live_stream_fifo -s 352x288 -pix_fmt yuv420p -vcodec rawvideo -s 176x144 test31.yuv

http://bbs.youkuaiyun.com/topics/350024712  #include #include #include #include #include #include #include #include #include #include #include #include #include #include #i

1. call stack    avformat_open_input() {             init_input(); // get s->iformat if s->iformat is NULL.             s->iformat->read_header(s) // rtsp_read_header { // ff_rtsp_demuxer

When enable librtmp for ffmpeg, ffmpeg report librtmp not found.The way for solving the problem is like thus.Modify configure file like thus.1. note off old enabled librtmp line2. add one

http://blog.chinaunix.net/uid-26000296-id-3483782.html 一、FFmpeg忽略了adaptation_field()数据FFmpeg忽略了包含PCR值的adaptation_filed数据;代码(libavformat/mpegts.c)分析如下:/* 解析TS包 */int handle_packet(MpegT

http://www.imobilebbs.com/wordpress/archives/date/2012/04http://tech.ddvip.com/2013-02/1360325570190225.html1. for example 1http://kongweile.iteye.com/blog/1153483if u wanna comp

http://3xin2yi.info/wwwroot/tech/doku.php/tech:multimedia:ffmpeg

http://chfj007.blog.163.com/blog/static/17314504420121144223910/

1. struct definetypedef struct AVOutputFormat {    const char *name;    /**     * Descriptive name for the format, meant to be more human-readable     * than \p name. You \e should use the

1. rtcp/rtp on udprt->nb_rtsp_streams = 1;   // one stream for each pair rtcp/rtpudp_read_packet {        1. get rtsp_hd, rtp_handle, rtcp_handle            get rtsp_hd =>

前言FFmpeg的优秀在于它的功能强大和良好的系统框架，而滤镜就是其中之一。ffmpeg的自带滤镜不但能对视频进行裁剪，添加logo，还能将多个滤镜组全使用。更妙之处在于它还可以方便地添加自己定义的各种滤镜。这种可扩展性对于实际应用来说就颇有价值了。闲言少述，书归正传！本文第一部分是我对wiki上的一篇教程的翻译和解释，但是它并没有讲解如何将写好的滤镜添加到ffmpeg中编译并

2 - denote 1 zero found1 - denote 2 zeros found0 - denote >= 3 zeros found3 - no this state4 - denote 2 zeros and 1 one found, i.e., 0015 - denote at least 3 zeros and 1 one found, i.e., 000

excerpt from : https://github.com/yixia/FFmpeg-Android/blob/master/FFmpeg-Android.sh #!/bin/bash## FFmpeg-Android, a bash script to build FFmpeg for Android.## Copyright (c) 2012 Cedric Fung

1. configureconfigure --prefix=/usr/local/ffmpeg \                       --enable-version3 \                       --enable-gpl --enable-pthreads\                       --disable-postproc --en

const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {    [AV_PIX_FMT_YUV420P] = {        .name = "yuv420p",        .nb_components = 3,        .log2_chroma_w = 1,        .log2_ch

int h264_parse_extradata(AVCodecParserContext *s, AVCodecContext *avctx){    int subw = 1, subh = 1;    H264Context *hctx = s->priv_data;    if (avctx->extradata_size) {        hctx->s.avctx

1. download and install jdk-1.72. download and install jre-1.73. download and install apache-ant-1.94. set home environment variableinsert these into /etc/profileJAVA_HOME=/usr/local/jdk1.7.

static int sdp_parse_fmtp_config_h264(AVStream *stream,                                      PayloadContext *h264_data,                                      char *attr, char *value){    AVCode