4 #include "libavutil/avassert.h"
5 #include "libavdevice/avdevice.h"
6 #include "libavfilter/avfilter.h"
7 #include "libavfilter/buffersink.h"
8 #include "libavformat/avformat.h"
13 AVFilterContext *sink;
16 static int create_sink(Stream *st, AVFilterGraph *graph,
17 AVFilterContext *f, int idx)
19 enum AVMediaType type = avfilter_pad_get_type(f->output_pads, idx);
20 const char *sink_name;
24 case AVMEDIA_TYPE_VIDEO: sink_name = "buffersink"; break;
25 case AVMEDIA_TYPE_AUDIO: sink_name = "abuffersink"; break;
27 av_log(NULL, AV_LOG_ERROR, "Stream type not supported\n");
28 return AVERROR(EINVAL);
30 ret = avfilter_graph_create_filter(&st->sink,
31 avfilter_get_by_name(sink_name),
32 NULL, NULL, NULL, graph);
35 ret = avfilter_link(f, idx, st->sink, 0);
41 int main(int argc, char **argv)
43 char *in_graph_desc, **out_dev_name;
44 int nb_out_dev = 0, nb_streams = 0;
45 AVFilterGraph *in_graph = NULL;
46 Stream *streams = NULL, *st;
47 AVFrame *frame = NULL;
48 int i, j, run = 1, ret;
50 //av_log_set_level(AV_LOG_DEBUG);
53 av_log(NULL, AV_LOG_ERROR,
54 "Usage: %s filter_graph dev:out [dev2:out2...]\n\n"
56 "%s movie=file.nut:s=v+a xv:- alsa:default\n"
57 "%s movie=file.nut:s=v+a uncodedframecrc:pipe:0\n",
58 argv[0], argv[0], argv[0]);
61 in_graph_desc = argv[1];
62 out_dev_name = argv + 2;
63 nb_out_dev = argc - 2;
66 avdevice_register_all();
67 avfilter_register_all();
69 /* Create input graph */
70 if (!(in_graph = avfilter_graph_alloc())) {
71 ret = AVERROR(ENOMEM);
72 av_log(NULL, AV_LOG_ERROR, "Unable to alloc graph graph: %s\n",
76 ret = avfilter_graph_parse_ptr(in_graph, in_graph_desc, NULL, NULL, NULL);
78 av_log(NULL, AV_LOG_ERROR, "Unable to parse graph: %s\n",
83 for (i = 0; i < in_graph->nb_filters; i++) {
84 AVFilterContext *f = in_graph->filters[i];
85 for (j = 0; j < f->nb_inputs; j++) {
87 av_log(NULL, AV_LOG_ERROR, "Graph has unconnected inputs\n");
88 ret = AVERROR(EINVAL);
92 for (j = 0; j < f->nb_outputs; j++)
97 av_log(NULL, AV_LOG_ERROR, "Graph has no output stream\n");
98 ret = AVERROR(EINVAL);
101 if (nb_out_dev != 1 && nb_out_dev != nb_streams) {
102 av_log(NULL, AV_LOG_ERROR,
103 "Graph has %d output streams, %d devices given\n",
104 nb_streams, nb_out_dev);
105 ret = AVERROR(EINVAL);
109 if (!(streams = av_calloc(nb_streams, sizeof(*streams)))) {
110 ret = AVERROR(ENOMEM);
111 av_log(NULL, AV_LOG_ERROR, "Could not allocate streams\n");
114 for (i = 0; i < in_graph->nb_filters; i++) {
115 AVFilterContext *f = in_graph->filters[i];
116 for (j = 0; j < f->nb_outputs; j++) {
117 if (!f->outputs[j]) {
118 if ((ret = create_sink(st++, in_graph, f, j)) < 0)
123 av_assert0(st - streams == nb_streams);
124 if ((ret = avfilter_graph_config(in_graph, NULL)) < 0) {
125 av_log(NULL, AV_LOG_ERROR, "Failed to configure graph\n");
129 /* Create output devices */
130 for (i = 0; i < nb_out_dev; i++) {
131 char *fmt = NULL, *dev = out_dev_name[i];
133 if ((dev = strchr(dev, ':'))) {
135 fmt = out_dev_name[i];
137 ret = avformat_alloc_output_context2(&st->mux, NULL, fmt, dev);
139 av_log(NULL, AV_LOG_ERROR, "Failed to allocate output: %s\n",
143 if (!(st->mux->oformat->flags & AVFMT_NOFILE)) {
144 ret = avio_open2(&st->mux->pb, st->mux->url, AVIO_FLAG_WRITE,
147 av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
153 for (; i < nb_streams; i++)
154 streams[i].mux = streams[0].mux;
156 /* Create output device streams */
157 for (i = 0; i < nb_streams; i++) {
159 if (!(st->stream = avformat_new_stream(st->mux, NULL))) {
160 ret = AVERROR(ENOMEM);
161 av_log(NULL, AV_LOG_ERROR, "Failed to create output stream\n");
164 st->stream->codecpar->codec_type = av_buffersink_get_type(st->sink);
165 st->stream->time_base = av_buffersink_get_time_base(st->sink);
166 switch (av_buffersink_get_type(st->sink)) {
167 case AVMEDIA_TYPE_VIDEO:
168 st->stream->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
169 st->stream->avg_frame_rate =
170 st->stream-> r_frame_rate = av_buffersink_get_frame_rate(st->sink);
171 st->stream->codecpar->width = av_buffersink_get_w(st->sink);
172 st->stream->codecpar->height = av_buffersink_get_h(st->sink);
173 st->stream->codecpar->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(st->sink);
174 st->stream->codecpar->format = av_buffersink_get_format(st->sink);
176 case AVMEDIA_TYPE_AUDIO:
177 st->stream->codecpar->channel_layout = av_buffersink_get_channel_layout(st->sink);
178 st->stream->codecpar->channels = av_buffersink_get_channels(st->sink);
179 st->stream->codecpar->sample_rate = av_buffersink_get_sample_rate(st->sink);
180 st->stream->codecpar->format = av_buffersink_get_format(st->sink);
181 st->stream->codecpar->codec_id = av_get_pcm_codec(st->stream->codecpar->format, -1);
184 av_assert0(!"reached");
188 /* Init output devices */
189 for (i = 0; i < nb_out_dev; i++) {
191 if ((ret = avformat_write_header(st->mux, NULL)) < 0) {
192 av_log(st->mux, AV_LOG_ERROR, "Failed to init output: %s\n",
198 /* Check output devices */
199 for (i = 0; i < nb_streams; i++) {
201 ret = av_write_uncoded_frame_query(st->mux, st->stream->index);
203 av_log(st->mux, AV_LOG_ERROR,
204 "Uncoded frames not supported on stream #%d: %s\n",
211 ret = avfilter_graph_request_oldest(in_graph);
213 if (ret == AVERROR_EOF) {
216 av_log(NULL, AV_LOG_ERROR, "Error filtering: %s\n",
221 for (i = 0; i < nb_streams; i++) {
224 if (!frame && !(frame = av_frame_alloc())) {
225 ret = AVERROR(ENOMEM);
226 av_log(NULL, AV_LOG_ERROR, "Could not allocate frame\n");
229 ret = av_buffersink_get_frame_flags(st->sink, frame,
230 AV_BUFFERSINK_FLAG_NO_REQUEST);
232 if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
233 av_log(NULL, AV_LOG_WARNING, "Error in sink: %s\n",
237 if (frame->pts != AV_NOPTS_VALUE)
238 frame->pts = av_rescale_q(frame->pts,
239 av_buffersink_get_time_base(st->sink),
240 st->stream->time_base);
241 ret = av_interleaved_write_uncoded_frame(st->mux,
246 av_log(st->mux, AV_LOG_ERROR,
247 "Error writing frame: %s\n", av_err2str(ret));
255 for (i = 0; i < nb_out_dev; i++) {
257 av_write_trailer(st->mux);
261 av_frame_free(&frame);
262 avfilter_graph_free(&in_graph);
264 for (i = 0; i < nb_out_dev; i++) {
268 avio_closep(&st->mux->pb);
269 avformat_free_context(st->mux);