274 lines
9.4 KiB
C
274 lines
9.4 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libavutil/avassert.h"
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#include "libavdevice/avdevice.h"
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#include "libavfilter/avfilter.h"
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#include "libavfilter/buffersink.h"
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#include "libavformat/avformat.h"
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typedef struct {
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AVFormatContext *mux;
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AVStream *stream;
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AVFilterContext *sink;
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} Stream;
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static int create_sink(Stream *st, AVFilterGraph *graph,
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AVFilterContext *f, int idx)
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{
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enum AVMediaType type = avfilter_pad_get_type(f->output_pads, idx);
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const char *sink_name;
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int ret;
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switch (type) {
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case AVMEDIA_TYPE_VIDEO: sink_name = "buffersink"; break;
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case AVMEDIA_TYPE_AUDIO: sink_name = "abuffersink"; break;
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default:
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av_log(NULL, AV_LOG_ERROR, "Stream type not supported\n");
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return AVERROR(EINVAL);
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}
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ret = avfilter_graph_create_filter(&st->sink,
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avfilter_get_by_name(sink_name),
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NULL, NULL, NULL, graph);
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if (ret < 0)
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return ret;
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ret = avfilter_link(f, idx, st->sink, 0);
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if (ret < 0)
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return ret;
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return 0;
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}
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int main(int argc, char **argv)
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{
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char *in_graph_desc, **out_dev_name;
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int nb_out_dev = 0, nb_streams = 0;
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AVFilterGraph *in_graph = NULL;
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Stream *streams = NULL, *st;
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AVFrame *frame = NULL;
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int i, j, run = 1, ret;
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//av_log_set_level(AV_LOG_DEBUG);
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if (argc < 3) {
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av_log(NULL, AV_LOG_ERROR,
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"Usage: %s filter_graph dev:out [dev2:out2...]\n\n"
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"Examples:\n"
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"%s movie=file.nut:s=v+a xv:- alsa:default\n"
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"%s movie=file.nut:s=v+a uncodedframecrc:pipe:0\n",
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argv[0], argv[0], argv[0]);
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exit(1);
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}
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in_graph_desc = argv[1];
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out_dev_name = argv + 2;
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nb_out_dev = argc - 2;
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avdevice_register_all();
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/* Create input graph */
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if (!(in_graph = avfilter_graph_alloc())) {
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ret = AVERROR(ENOMEM);
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av_log(NULL, AV_LOG_ERROR, "Unable to alloc graph graph: %s\n",
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av_err2str(ret));
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goto fail;
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}
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ret = avfilter_graph_parse_ptr(in_graph, in_graph_desc, NULL, NULL, NULL);
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if (ret < 0) {
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av_log(NULL, AV_LOG_ERROR, "Unable to parse graph: %s\n",
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av_err2str(ret));
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goto fail;
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}
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nb_streams = 0;
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for (i = 0; i < in_graph->nb_filters; i++) {
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AVFilterContext *f = in_graph->filters[i];
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for (j = 0; j < f->nb_inputs; j++) {
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if (!f->inputs[j]) {
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av_log(NULL, AV_LOG_ERROR, "Graph has unconnected inputs\n");
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ret = AVERROR(EINVAL);
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goto fail;
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}
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}
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for (j = 0; j < f->nb_outputs; j++)
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if (!f->outputs[j])
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nb_streams++;
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}
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if (!nb_streams) {
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av_log(NULL, AV_LOG_ERROR, "Graph has no output stream\n");
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ret = AVERROR(EINVAL);
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goto fail;
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}
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if (nb_out_dev != 1 && nb_out_dev != nb_streams) {
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av_log(NULL, AV_LOG_ERROR,
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"Graph has %d output streams, %d devices given\n",
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nb_streams, nb_out_dev);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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if (!(streams = av_calloc(nb_streams, sizeof(*streams)))) {
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ret = AVERROR(ENOMEM);
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av_log(NULL, AV_LOG_ERROR, "Could not allocate streams\n");
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}
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st = streams;
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for (i = 0; i < in_graph->nb_filters; i++) {
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AVFilterContext *f = in_graph->filters[i];
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for (j = 0; j < f->nb_outputs; j++) {
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if (!f->outputs[j]) {
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if ((ret = create_sink(st++, in_graph, f, j)) < 0)
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goto fail;
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}
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}
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}
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av_assert0(st - streams == nb_streams);
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if ((ret = avfilter_graph_config(in_graph, NULL)) < 0) {
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av_log(NULL, AV_LOG_ERROR, "Failed to configure graph\n");
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goto fail;
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}
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/* Create output devices */
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for (i = 0; i < nb_out_dev; i++) {
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char *fmt = NULL, *dev = out_dev_name[i];
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st = &streams[i];
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if ((dev = strchr(dev, ':'))) {
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*(dev++) = 0;
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fmt = out_dev_name[i];
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}
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ret = avformat_alloc_output_context2(&st->mux, NULL, fmt, dev);
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if (ret < 0) {
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av_log(NULL, AV_LOG_ERROR, "Failed to allocate output: %s\n",
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av_err2str(ret));
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goto fail;
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}
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if (!(st->mux->oformat->flags & AVFMT_NOFILE)) {
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ret = avio_open2(&st->mux->pb, st->mux->url, AVIO_FLAG_WRITE,
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NULL, NULL);
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if (ret < 0) {
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av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
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av_err2str(ret));
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goto fail;
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}
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}
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}
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for (; i < nb_streams; i++)
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streams[i].mux = streams[0].mux;
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/* Create output device streams */
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for (i = 0; i < nb_streams; i++) {
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st = &streams[i];
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if (!(st->stream = avformat_new_stream(st->mux, NULL))) {
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ret = AVERROR(ENOMEM);
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av_log(NULL, AV_LOG_ERROR, "Failed to create output stream\n");
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goto fail;
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}
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st->stream->codecpar->codec_type = av_buffersink_get_type(st->sink);
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st->stream->time_base = av_buffersink_get_time_base(st->sink);
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switch (av_buffersink_get_type(st->sink)) {
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case AVMEDIA_TYPE_VIDEO:
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st->stream->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
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st->stream->avg_frame_rate =
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st->stream-> r_frame_rate = av_buffersink_get_frame_rate(st->sink);
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st->stream->codecpar->width = av_buffersink_get_w(st->sink);
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st->stream->codecpar->height = av_buffersink_get_h(st->sink);
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st->stream->codecpar->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(st->sink);
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st->stream->codecpar->format = av_buffersink_get_format(st->sink);
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break;
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case AVMEDIA_TYPE_AUDIO:
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st->stream->codecpar->channel_layout = av_buffersink_get_channel_layout(st->sink);
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st->stream->codecpar->channels = av_buffersink_get_channels(st->sink);
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st->stream->codecpar->sample_rate = av_buffersink_get_sample_rate(st->sink);
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st->stream->codecpar->format = av_buffersink_get_format(st->sink);
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st->stream->codecpar->codec_id = av_get_pcm_codec(st->stream->codecpar->format, -1);
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break;
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default:
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av_assert0(!"reached");
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}
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}
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/* Init output devices */
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for (i = 0; i < nb_out_dev; i++) {
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st = &streams[i];
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if ((ret = avformat_write_header(st->mux, NULL)) < 0) {
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av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
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av_err2str(ret));
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goto fail;
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}
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}
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/* Check output devices */
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for (i = 0; i < nb_streams; i++) {
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st = &streams[i];
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ret = av_write_uncoded_frame_query(st->mux, st->stream->index);
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if (ret < 0) {
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av_log(st->mux, AV_LOG_ERROR,
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"Uncoded frames not supported on stream #%d: %s\n",
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i, av_err2str(ret));
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goto fail;
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}
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}
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while (run) {
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ret = avfilter_graph_request_oldest(in_graph);
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if (ret < 0) {
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if (ret == AVERROR_EOF) {
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run = 0;
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} else {
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av_log(NULL, AV_LOG_ERROR, "Error filtering: %s\n",
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av_err2str(ret));
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break;
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}
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}
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for (i = 0; i < nb_streams; i++) {
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st = &streams[i];
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while (1) {
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if (!frame && !(frame = av_frame_alloc())) {
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ret = AVERROR(ENOMEM);
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av_log(NULL, AV_LOG_ERROR, "Could not allocate frame\n");
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goto fail;
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}
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ret = av_buffersink_get_frame_flags(st->sink, frame,
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AV_BUFFERSINK_FLAG_NO_REQUEST);
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if (ret < 0) {
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if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
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av_log(NULL, AV_LOG_WARNING, "Error in sink: %s\n",
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av_err2str(ret));
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break;
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}
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if (frame->pts != AV_NOPTS_VALUE)
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frame->pts = av_rescale_q(frame->pts,
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av_buffersink_get_time_base(st->sink),
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st->stream->time_base);
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ret = av_interleaved_write_uncoded_frame(st->mux,
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st->stream->index,
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frame);
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frame = NULL;
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if (ret < 0) {
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av_log(st->mux, AV_LOG_ERROR,
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"Error writing frame: %s\n", av_err2str(ret));
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goto fail;
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}
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}
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}
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}
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ret = 0;
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for (i = 0; i < nb_out_dev; i++) {
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st = &streams[i];
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av_write_trailer(st->mux);
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}
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fail:
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av_frame_free(&frame);
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avfilter_graph_free(&in_graph);
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if (streams) {
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for (i = 0; i < nb_out_dev; i++) {
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st = &streams[i];
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if (st->mux) {
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if (st->mux->pb)
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avio_closep(&st->mux->pb);
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avformat_free_context(st->mux);
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}
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}
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}
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av_freep(&streams);
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return ret < 0;
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}
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