From 4a6d9312cc1c9d62d66c4def71246d9faae29edb Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期三, 03 三月 2021 14:26:16 +0800
Subject: [PATCH] environment settings
---
module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/remuxing.c | 191 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 191 insertions(+), 0 deletions(-)
diff --git a/module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/remuxing.c b/module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/remuxing.c
new file mode 100644
index 0000000..9e4d103
--- /dev/null
+++ b/module/VideoPlayer/lib/linux/ffmpeg/share/ffmpeg/examples/remuxing.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2013 Stefano Sabatini
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+/**
+ * @file
+ * libavformat/libavcodec demuxing and muxing API example.
+ *
+ * Remux streams from one container format to another.
+ * @example remuxing.c
+ */
+
+#include <libavutil/timestamp.h>
+#include <libavformat/avformat.h>
+
+static void log_packet(const AVFormatContext *fmt_ctx, const AVPacket *pkt, const char *tag)
+{
+ AVRational *time_base = &fmt_ctx->streams[pkt->stream_index]->time_base;
+
+ printf("%s: pts:%s pts_time:%s dts:%s dts_time:%s duration:%s duration_time:%s stream_index:%d\n",
+ tag,
+ av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, time_base),
+ av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, time_base),
+ av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, time_base),
+ pkt->stream_index);
+}
+
+int main(int argc, char **argv)
+{
+ AVOutputFormat *ofmt = NULL;
+ AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;
+ AVPacket pkt;
+ const char *in_filename, *out_filename;
+ int ret, i;
+ int stream_index = 0;
+ int *stream_mapping = NULL;
+ int stream_mapping_size = 0;
+
+ if (argc < 3) {
+ printf("usage: %s input output\n"
+ "API example program to remux a media file with libavformat and libavcodec.\n"
+ "The output format is guessed according to the file extension.\n"
+ "\n", argv[0]);
+ return 1;
+ }
+
+ in_filename = argv[1];
+ out_filename = argv[2];
+
+ if ((ret = avformat_open_input(&ifmt_ctx, in_filename, 0, 0)) < 0) {
+ fprintf(stderr, "Could not open input file '%s'", in_filename);
+ goto end;
+ }
+
+ if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) {
+ fprintf(stderr, "Failed to retrieve input stream information");
+ goto end;
+ }
+
+ av_dump_format(ifmt_ctx, 0, in_filename, 0);
+
+ avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, out_filename);
+ if (!ofmt_ctx) {
+ fprintf(stderr, "Could not create output context\n");
+ ret = AVERROR_UNKNOWN;
+ goto end;
+ }
+
+ stream_mapping_size = ifmt_ctx->nb_streams;
+ stream_mapping = av_mallocz_array(stream_mapping_size, sizeof(*stream_mapping));
+ if (!stream_mapping) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+
+ ofmt = ofmt_ctx->oformat;
+
+ for (i = 0; i < ifmt_ctx->nb_streams; i++) {
+ AVStream *out_stream;
+ AVStream *in_stream = ifmt_ctx->streams[i];
+ AVCodecParameters *in_codecpar = in_stream->codecpar;
+
+ if (in_codecpar->codec_type != AVMEDIA_TYPE_AUDIO &&
+ in_codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
+ in_codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) {
+ stream_mapping[i] = -1;
+ continue;
+ }
+
+ stream_mapping[i] = stream_index++;
+
+ out_stream = avformat_new_stream(ofmt_ctx, NULL);
+ if (!out_stream) {
+ fprintf(stderr, "Failed allocating output stream\n");
+ ret = AVERROR_UNKNOWN;
+ goto end;
+ }
+
+ ret = avcodec_parameters_copy(out_stream->codecpar, in_codecpar);
+ if (ret < 0) {
+ fprintf(stderr, "Failed to copy codec parameters\n");
+ goto end;
+ }
+ out_stream->codecpar->codec_tag = 0;
+ }
+ av_dump_format(ofmt_ctx, 0, out_filename, 1);
+
+ if (!(ofmt->flags & AVFMT_NOFILE)) {
+ ret = avio_open(&ofmt_ctx->pb, out_filename, AVIO_FLAG_WRITE);
+ if (ret < 0) {
+ fprintf(stderr, "Could not open output file '%s'", out_filename);
+ goto end;
+ }
+ }
+
+ ret = avformat_write_header(ofmt_ctx, NULL);
+ if (ret < 0) {
+ fprintf(stderr, "Error occurred when opening output file\n");
+ goto end;
+ }
+
+ while (1) {
+ AVStream *in_stream, *out_stream;
+
+ ret = av_read_frame(ifmt_ctx, &pkt);
+ if (ret < 0)
+ break;
+
+ in_stream = ifmt_ctx->streams[pkt.stream_index];
+ if (pkt.stream_index >= stream_mapping_size ||
+ stream_mapping[pkt.stream_index] < 0) {
+ av_packet_unref(&pkt);
+ continue;
+ }
+
+ pkt.stream_index = stream_mapping[pkt.stream_index];
+ out_stream = ofmt_ctx->streams[pkt.stream_index];
+ log_packet(ifmt_ctx, &pkt, "in");
+
+ /* copy packet */
+ pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
+ pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
+ pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);
+ pkt.pos = -1;
+ log_packet(ofmt_ctx, &pkt, "out");
+
+ ret = av_interleaved_write_frame(ofmt_ctx, &pkt);
+ if (ret < 0) {
+ fprintf(stderr, "Error muxing packet\n");
+ break;
+ }
+ av_packet_unref(&pkt);
+ }
+
+ av_write_trailer(ofmt_ctx);
+end:
+
+ avformat_close_input(&ifmt_ctx);
+
+ /* close output */
+ if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE))
+ avio_closep(&ofmt_ctx->pb);
+ avformat_free_context(ofmt_ctx);
+
+ av_freep(&stream_mapping);
+
+ if (ret < 0 && ret != AVERROR_EOF) {
+ fprintf(stderr, "Error occurred: %s\n", av_err2str(ret));
+ return 1;
+ }
+
+ return 0;
+}
--
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