FFMPEG_TS_DEMUX_本地文件_1

#include "demuxing.h" FILE * OpenOutputFile(FILE * FOutputFile,char * OutputFileName) { FOutputFile = fopen(OutputFileName, "w"); if (NULL != FOutputFile) { fclose(FOutputFile); fopen(OutputFileName, "w");//文件清空 fclose(FOutputFile); FOutputFile = NULL; } else { printf("打开输出文件失败!\n"); } FOutputFile = fopen(OutputFileName, "wb"); return FOutputFile; } int open_codec_context(int *stream_idx, AVFormatContext *fmt_ctx, enum AVMediaType type) { int ret; AVStream *st; AVCodecContext *dec_ctx = NULL; AVCodec *dec = NULL; ret = av_find_best_stream(fmt_ctx, type, -1, -1, NULL, 0); if (ret < 0) { printf("Could not find %s stream in input file '%s'\n",av_get_media_type_string(type), INPUTTSFILENAME); return ret; } else { *stream_idx = ret; st = fmt_ctx->streams[*stream_idx]; /* find decoder for the stream */ dec_ctx = st->codec; dec = avcodec_find_decoder(dec_ctx->codec_id); if (!dec) { printf("Failed to find %s codec\n",av_get_media_type_string(type)); return ret; } if ((ret = avcodec_open2(dec_ctx, dec, NULL)) < 0) { printf("Failed to open %s codec\n",av_get_media_type_string(type)); return ret; } } return 0; } int decode_packet(int *got_frame, int cached) { int ret = 0; AVSampleFormat m_format; if (pkt.stream_index == video_stream_idx) { /* decode video frame */ ret = avcodec_decode_video2(video_dec_ctx, frame, got_frame, &pkt); if (ret < 0) { printf("Error decoding video frame\n"); return ret; } if (*got_frame) { printf("video_frame%s n:%d nb_samples:%d\n",cached ? "(cached)" : "", video_frame_count++, frame->nb_samples); /* copy decoded frame to destination buffer: * this is required since rawvideo expects non aligned data */ av_image_copy(video_yuv_data, video_yuv_linesize, (const uint8_t **)(frame->data), frame->linesize, video_dec_ctx->pix_fmt, video_dec_ctx->width, video_dec_ctx->height); /* write to rawvideo file */ fwrite(video_yuv_data[0], 1, video_yuv_bufsize, video_yuv_file); } } else if (pkt.stream_index == audio_stream_idx) { /* decode audio frame */ ret = avcodec_decode_audio4(audio_dec_ctx, frame, got_frame, &pkt); if (ret < 0) { printf("Error decoding audio frame\n"); return ret; } switch(frame->format) { case -1: m_format = AV_SAMPLE_FMT_NONE; break; case 0: m_format = AV_SAMPLE_FMT_U8; break; case 1: m_format = AV_SAMPLE_FMT_S16; break; case 2: m_format = AV_SAMPLE_FMT_S32; break; case 3: m_format = AV_SAMPLE_FMT_FLT; break; case 4: m_format = AV_SAMPLE_FMT_DBL; break; case 5: m_format = AV_SAMPLE_FMT_U8P; break; case 6: m_format = AV_SAMPLE_FMT_S16P; break; case 7: m_format = AV_SAMPLE_FMT_S32P; break; case 8: m_format = AV_SAMPLE_FMT_FLTP; break; case 9: m_format = AV_SAMPLE_FMT_DBLP; break; case 10: m_format = AV_SAMPLE_FMT_NB; break; default: printf("frame->format = %d ERROR \n",frame->format); } if (*got_frame) { printf("audio_frame%s n:%d nb_samples:%d\n", cached ? "(cached)" : "", audio_frame_count++, frame->nb_samples); ret = av_samples_alloc(audio_pcm_data, &audio_pcm_linesize, frame->channels, frame->nb_samples, m_format, 1); if (ret < 0) { printf( "Could not allocate audio buffer\n"); return AVERROR(ENOMEM); } /* TODO: extend return code of the av_samples_* functions so that this call is not needed */ audio_pcm_bufsize =av_samples_get_buffer_size(NULL, frame->channels, frame->nb_samples, m_format, 1); /* copy audio data to destination buffer: * this is required since rawaudio expects non aligned data */ av_samples_copy(audio_pcm_data, frame->data, 0, 0, frame->nb_samples, frame->channels, m_format); /* write to rawaudio file */ fwrite(audio_pcm_data[0], 1, audio_pcm_linesize, audio_pcm_file); av_freep(&audio_pcm_data[0]); } } return ret; } int zwg_save_frame() { //音频 if (pkt.stream_index == audio_stream_idx) { fwrite(pkt.data, 1, pkt.size, audio_MP3_file); } //视频 else if (pkt.stream_index == video_stream_idx ) { fwrite(pkt.data, 1, pkt.size, video_H264_file); } return 1; } int get_format_from_sample_fmt(const char **fmt, enum AVSampleFormat sample_fmt) { int i; struct sample_fmt_entry { enum AVSampleFormat sample_fmt; const char *fmt_be, *fmt_le; } sample_fmt_entries[] = { { AV_SAMPLE_FMT_U8, "u8", "u8" }, { AV_SAMPLE_FMT_S16, "s16be", "s16le" }, { AV_SAMPLE_FMT_S32, "s32be", "s32le" }, { AV_SAMPLE_FMT_FLT, "f32be", "f32le" }, { AV_SAMPLE_FMT_DBL, "f64be", "f64le" }, }; *fmt = NULL; for (i = 0; i < FF_ARRAY_ELEMS(sample_fmt_entries); i++) { struct sample_fmt_entry *entry = &sample_fmt_entries[i]; if (sample_fmt == entry->sample_fmt) { *fmt = AV_NE(entry->fmt_be, entry->fmt_le); return 0; } } printf("sample format %s is not supported as output format\n",av_get_sample_fmt_name(sample_fmt)); return -1; } int Zwg_Demuxing() { if (avformat_open_input(&fmt_ctx, INPUTTSFILENAME, NULL, NULL) < 0) //打开要别应用的输入文件 { printf("Could not open source file %s\n", INPUTTSFILENAME); return getchar(); } if (avformat_find_stream_info(fmt_ctx, NULL) < 0) //查看流信息 { printf("Could not find stream information\n"); return getchar(); } av_dump_format(fmt_ctx, 0, INPUTTSFILENAME, 0); //输入信息错误写入 video_yuv_file = OpenOutputFile(video_yuv_file,OUTPUTYUVFILENAME); audio_pcm_file = OpenOutputFile(audio_pcm_file,OUTPUTPCMFILENAME); video_H264_file = OpenOutputFile(video_H264_file,OUTPUTH264FILENAME); audio_MP3_file = OpenOutputFile(audio_MP3_file,OUTPUTMP3FILENAME); if (open_codec_context(&video_stream_idx, fmt_ctx, AVMEDIA_TYPE_VIDEO) >= 0) //得到视频信息的CONTEXT { video_stream = fmt_ctx->streams[video_stream_idx]; video_dec_ctx = video_stream->codec; //分配解码后YUV数据空间 ret = av_image_alloc(video_yuv_data, video_yuv_linesize,video_dec_ctx->width, video_dec_ctx->height,video_dec_ctx->pix_fmt, 1); if (ret < 0) { printf("Could not allocate raw video buffer\n"); } video_yuv_bufsize = ret; } if (open_codec_context(&audio_stream_idx, fmt_ctx, AVMEDIA_TYPE_AUDIO) >= 0) { int nb_planes; audio_stream = fmt_ctx->streams[audio_stream_idx]; audio_dec_ctx = audio_stream->codec; nb_planes = av_sample_fmt_is_planar(audio_dec_ctx->sample_fmt) ?audio_dec_ctx->channels : 1; audio_pcm_data = (uint8_t **)av_mallocz(sizeof(uint8_t *) * nb_planes); if (!audio_pcm_data) { printf("Could not allocate audio data buffers\n"); ret = AVERROR(ENOMEM); } } if (!audio_stream && !video_stream) { printf("Could not find audio or video stream in the input, aborting\n"); ret = 1; return getchar(); } frame = avcodec_alloc_frame(); //分配空间 if (!frame) { printf("Could not allocate frame\n"); return getchar(); } av_init_packet(&pkt); // initialize packet, set data to NULL, let the demuxer fill it pkt.data = NULL; pkt.size = 0; if (video_stream) { printf("Demuxing video from file '%s' into '%s' and '%s'\n", INPUTTSFILENAME, OUTPUTYUVFILENAME,OUTPUTH264FILENAME); } if (audio_stream) { printf("Demuxing video from file '%s' into '%s'