avformat_write_header()的调用关系如下图所示。 avformat_write_header()完成了以下工作: (1)调用init_muxer()初始化复用器 (2)调用AVOutputFormat的write_header() 具体可以参见: FFmpeg源代码简单分析:avformat_write_header() av_write_frame av_write_frame()用于输出一帧视音频数据,它的...
如果输出文件 MP4 由于不支持pcm_alaw音频格式就会报 avformat_write_header 的时候 -22 错误 需要吧摄像头音频流改成acc 以下为正确 Input #0, rtsp, from 'rtsp://admin:hk1234@192.168.60.13/media/video': Metadata: title : VCP IPC Realtime stream Duration: N/A, start: 0.000000, bitrate: N/A ...
.write_header = flv_write_header, .write_packet = flv_write_packet, .write_trailer = flv_write_trailer, .deinit = flv_deinit, .check_bitstream= flv_check_bitstream, .codec_tag = (const AVCodecTag* const []) { flv_video_codec_ids, flv_audio_codec_ids, 0 }, .flags = AVFMT_GLOBAL...
将一段音频编码为AAC格式并保存为MP4文件。 cCopy code#include<stdio.h>#include<libavformat/avformat.h>#include<libavcodec/avcodec.h>intmain(){constchar*inputFilename="input.wav";constchar*outputFilename="output.mp4";AVFormatContext*inputFormatContext=NULL;AVCodecContext*inputCodecContext=NULL;AVFormatCo...
(int (*)(void *, uint8_t *, int)) ffurl_read, (int (*)(void *, uint8_t *, int)) ffurl_write, (int64_t (*)(void *, int64_t, int))ffurl_seek); fail: av_freep(&buffer); return AVERROR(ENOMEM); }
Exception in thread "main" org.bytedeco.javacv.FrameRecorder$Exception: avformat_write_header error() error -22: Could not write header to 'C:\Users\xxx\Desktop\test_resource\result\_packetRecord.m3u' at org.bytedeco.javacv.FFmpegFrameRecorder.startUnsafe(FFmpegFrameRecorder.java:900) at org....
这个代码出现在搜索下方的的热搜关键词，当然我并没有出现此问题，也不太清楚这个问题为什么会出现的别的...
1.2、调用AVInputFormat的read_header方法来尝试读取Stream的相关信息 intavformat_open_input(AVFormatContext **ps,constchar*filename,constAVInputFormat *fmt, AVDictionary **options) { AVFormatContext*s = *ps; FFFormatContext*si; AVDictionary*tmp =NULL; ...
系统调用是应用程序和操作系统内核之间的功能接口。其主要目的是使得用户可以使用操作系统提供的有关设备...
.write_header = flv_write_header, .write_packet = flv_write_packet, .write_trailer = flv_write_trailer, .deinit = flv_deinit, .check_bitstream= flv_check_bitstream, .codec_tag = (const AVCodecTag* const []) { flv_video_codec_ids, flv_audio_codec_ids, 0 }, .flags = AVFMT_GLOBAL...