[Libav-user] RTSP relay using not working

Andy Shaules bowljoman at gmail.com
Sun Nov 22 01:58:37 CET 2015


On 11/21/2015 2:51 AM, Kiran wrote:
> Hi,
> I am implementing an RTSP relay using libavcodec (ffmpeg). Basically, 
> it connects to an IP camera, which is an RTSP server, PULLs the stream 
> and then PUSHes it to wowza. I am finding it very difficult to get any 
> sample implementation for this in the internet. So I started 
> implementing this using bits and pieces from here and there. I took 
> code for code samples to a) read RTSP stream and write to file b)read 
> from file and serve it over RTSP.
>
> This is the current state of the code:
> /
>     /*
>      * Copyright (c) 2010 Nicolas George
>      * Copyright (c) 2011 Stefano Sabatini
>      * Copyright (c) 2014 Andrey Utkin
>      *
>      * 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
>      * API example for demuxing, decoding, filtering, encoding and muxing
>      * @example transcoding.c
>      */
>
>     #include <libavcodec/avcodec.h>
>     #include <libavformat/avformat.h>
>     #include <libavfilter/avfiltergraph.h>
>     #include <libavfilter/buffersink.h>
>     #include <libavfilter/buffersrc.h>
>     #include <libavutil/opt.h>
>     #include <libavutil/pixdesc.h>
>
>     static AVFormatContext *ifmt_ctx,*temp;
>     static AVFormatContext *ofmt_ctx;
>     typedef struct FilteringContext {
>         AVFilterContext *buffersink_ctx;
>         AVFilterContext *buffersrc_ctx;
>         AVFilterGraph *filter_graph;
>     } FilteringContext;
>     static FilteringContext *filter_ctx;
>
>     static int open_input_file(const char *filename)
>     {
>         int ret;
>         unsigned int i;
>
>         ifmt_ctx = NULL;
>         if ((ret = avformat_open_input(&ifmt_ctx, filename, NULL, 
> NULL)) < 0) {
>             av_log(NULL, AV_LOG_ERROR, "Cannot open input file\n");
>             return ret;
>         }
>
>         if ((ret = avformat_find_stream_info(ifmt_ctx, NULL)) < 0) {
>             av_log(NULL, AV_LOG_ERROR, "Cannot find stream 
> information\n");
>             return ret;
>         }
>
>         for (i = 0; i < ifmt_ctx->nb_streams; i++) {
>             AVStream *stream;
>             AVCodecContext *codec_ctx;
>             stream = ifmt_ctx->streams[i];
>             codec_ctx = stream->codec;
>             /* Reencode video & audio and remux subtitles etc. */
>             if (codec_ctx->codec_type == AVMEDIA_TYPE_VIDEO
>                     || codec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
>                 /* Open decoder */
>                 ret = avcodec_open2(codec_ctx,
> avcodec_find_decoder(codec_ctx->codec_id), NULL);
>                 if (ret < 0) {
>                     av_log(NULL, AV_LOG_ERROR, "Failed to open decoder 
> for stream #%u\n", i);
>                     return ret;
>                 }
>             }
>         }
>
>         av_dump_format(ifmt_ctx, 0, filename, 0);
>         return 0;
>     }
>
>     static int open_output_file(const char *filename)
>     {
>         AVStream *out_stream;
>         AVStream *in_stream;
>         AVCodecContext *dec_ctx, *enc_ctx;
>         AVCodec *encoder,*codec;
>         int ret;
>         unsigned int i;
>
>         ofmt_ctx = NULL;
>         avformat_open_input(&temp, "rtsp://localhost:8554/live", NULL, 
> NULL);
>         avformat_alloc_output_context2(&ofmt_ctx, 
> temp->oformat,"rtsp", filename);
>         if (!ofmt_ctx) {
>             av_log(NULL, AV_LOG_ERROR, "Could not create output 
> context\n");
>             return AVERROR_UNKNOWN;
>         }
>
>
>         for (i = 0; i < ifmt_ctx->nb_streams; i++) {
>             out_stream = avformat_new_stream(ofmt_ctx, NULL);
>             if (!out_stream) {
>                 av_log(NULL, AV_LOG_ERROR, "Failed allocating output 
> stream\n");
>                 return AVERROR_UNKNOWN;
>             }
>
>             in_stream = ifmt_ctx->streams[i];
>             dec_ctx = in_stream->codec;
>             enc_ctx = out_stream->codec;
>
>             if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO
>                     || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
>                 /* in this example, we choose transcoding to same codec */
>                 encoder = avcodec_find_encoder(dec_ctx->codec_id);
>                 printf("codec : %d",dec_ctx->codec_id);
>                 if (!encoder) {
>                     av_log(NULL, AV_LOG_FATAL, "Necessary encoder not 
> found\n");
>                     return AVERROR_INVALIDDATA;
>                 }
>
>                 /* In this example, we transcode to same properties 
> (picture size,
>                  * sample rate etc.). These properties can be changed 
> for output
>                  * streams easily using filters */
>                 if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
>                     enc_ctx->height = dec_ctx->height;
>                     enc_ctx->width = dec_ctx->width;
>                     enc_ctx->sample_aspect_ratio = 
> dec_ctx->sample_aspect_ratio;
>                     /* take first format from list of supported formats */
>                     enc_ctx->pix_fmt = encoder->pix_fmts[0];
>                     //enc_ctx->codec_id = AV_CODEC_ID_H264;
>                     /* video time_base can be set to whatever is handy 
> and supported by encoder */
>                     enc_ctx->time_base = dec_ctx->time_base;
>                 } else {
>                     enc_ctx->sample_rate = dec_ctx->sample_rate;
>                     enc_ctx->channel_layout = dec_ctx->channel_layout;
>                     enc_ctx->channels = 
> av_get_channel_layout_nb_channels(enc_ctx->channel_layout);
>                     /* take first format from list of supported formats */
>                     enc_ctx->sample_fmt = encoder->sample_fmts[0];
>                     enc_ctx->pix_fmt =AV_PIX_FMT_RGB24 ;
>                     enc_ctx->time_base = (AVRational){1, 
> enc_ctx->sample_rate};
>                 }
>
>                 /* Third parameter can be used to pass settings to 
> encoder */
>                 //codec = avcodec_find_encoder(AV_CODEC_ID_H264);
>                 ret = avcodec_open2(enc_ctx, encoder, NULL);
>                 if (ret < 0) {
>                     av_log(NULL, AV_LOG_ERROR, "Cannot open video 
> encoder for stream #%u\n", i);
>                     return ret;
>                 }
>             } else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) {
>                 av_log(NULL, AV_LOG_FATAL, "Elementary stream #%d is 
> of unknown type, cannot proceed\n", i);
>                 return AVERROR_INVALIDDATA;
>             } else {
>                 /* if this stream must be remuxed */
>                 ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec,
>                         ifmt_ctx->streams[i]->codec);
>                 if (ret < 0) {
>                     av_log(NULL, AV_LOG_ERROR, "Copying stream context 
> failed\n");
>                     return ret;
>                 }
>             }
>
>             if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
>                 enc_ctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
>
>         }
>         av_dump_format(ofmt_ctx, 0, filename, 1);
>
>         if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) {
>             ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Could not open output file 
> '%s'", filename);
>                 return ret;
>             }
>         }
>
>         /* init muxer, write output file header */
>         ret = avformat_write_header(ofmt_ctx, NULL);
>         if (ret < 0) {
>             av_log(NULL, AV_LOG_ERROR, "Error occurred when opening 
> output file\n");
>             return ret;
>         }
>
>         return 0;
>     }
>
>     static int init_filter(FilteringContext* fctx, AVCodecContext 
> *dec_ctx,
>             AVCodecContext *enc_ctx, const char *filter_spec)
>     {
>         char args[512];
>         int ret = 0;
>         AVFilter *buffersrc = NULL;
>         AVFilter *buffersink = NULL;
>         AVFilterContext *buffersrc_ctx = NULL;
>         AVFilterContext *buffersink_ctx = NULL;
>         AVFilterInOut *outputs = avfilter_inout_alloc();
>         AVFilterInOut *inputs  = avfilter_inout_alloc();
>         AVFilterGraph *filter_graph = avfilter_graph_alloc();
>
>         if (!outputs || !inputs || !filter_graph) {
>             ret = AVERROR(ENOMEM);
>             goto end;
>         }
>
>         if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
>             buffersrc = avfilter_get_by_name("buffer");
>             buffersink = avfilter_get_by_name("buffersink");
>             if (!buffersrc || !buffersink) {
>                 av_log(NULL, AV_LOG_ERROR, "filtering source or sink 
> element not found\n");
>                 ret = AVERROR_UNKNOWN;
>                 goto end;
>             }
>
>             snprintf(args, sizeof(args),
> "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
>                     dec_ctx->width, dec_ctx->height, dec_ctx->pix_fmt,
>                     dec_ctx->time_base.num, dec_ctx->time_base.den,
>                     dec_ctx->sample_aspect_ratio.num,
>                     dec_ctx->sample_aspect_ratio.den);
>
>             ret = avfilter_graph_create_filter(&buffersrc_ctx, 
> buffersrc, "in",
>                     args, NULL, filter_graph);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot create buffer 
> source\n");
>                 goto end;
>             }
>
>             ret = avfilter_graph_create_filter(&buffersink_ctx, 
> buffersink, "out",
>                     NULL, NULL, filter_graph);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot create buffer sink\n");
>                 goto end;
>             }
>
>             ret = av_opt_set_bin(buffersink_ctx, "pix_fmts",
>                     (uint8_t*)&enc_ctx->pix_fmt, sizeof(enc_ctx->pix_fmt),
>                     AV_OPT_SEARCH_CHILDREN);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot set output pixel 
> format\n");
>                 goto end;
>             }
>         } else if (dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
>             buffersrc = avfilter_get_by_name("abuffer");
>             buffersink = avfilter_get_by_name("abuffersink");
>             if (!buffersrc || !buffersink) {
>                 av_log(NULL, AV_LOG_ERROR, "filtering source or sink 
> element not found\n");
>                 ret = AVERROR_UNKNOWN;
>                 goto end;
>             }
>
>             if (!dec_ctx->channel_layout)
>                 dec_ctx->channel_layout =
> av_get_default_channel_layout(dec_ctx->channels);
>             snprintf(args, sizeof(args),
> "time_base=%d/%d:sample_rate=%d:sample_fmt=%s:channel_layout=0x%"PRIx64,
>                     dec_ctx->time_base.num, dec_ctx->time_base.den, 
> dec_ctx->sample_rate,
> av_get_sample_fmt_name(dec_ctx->sample_fmt),
>                     dec_ctx->channel_layout);
>             ret = avfilter_graph_create_filter(&buffersrc_ctx, 
> buffersrc, "in",
>                     args, NULL, filter_graph);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer 
> source\n");
>                 goto end;
>             }
>
>             ret = avfilter_graph_create_filter(&buffersink_ctx, 
> buffersink, "out",
>                     NULL, NULL, filter_graph);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot create audio buffer 
> sink\n");
>                 goto end;
>             }
>
>             ret = av_opt_set_bin(buffersink_ctx, "sample_fmts",
>                     (uint8_t*)&enc_ctx->sample_fmt, 
> sizeof(enc_ctx->sample_fmt),
>                     AV_OPT_SEARCH_CHILDREN);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot set output sample 
> format\n");
>                 goto end;
>             }
>
>             ret = av_opt_set_bin(buffersink_ctx, "channel_layouts",
>                     (uint8_t*)&enc_ctx->channel_layout,
>                     sizeof(enc_ctx->channel_layout), 
> AV_OPT_SEARCH_CHILDREN);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot set output channel 
> layout\n");
>                 goto end;
>             }
>
>             ret = av_opt_set_bin(buffersink_ctx, "sample_rates",
>                     (uint8_t*)&enc_ctx->sample_rate, 
> sizeof(enc_ctx->sample_rate),
>                     AV_OPT_SEARCH_CHILDREN);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Cannot set output sample 
> rate\n");
>                 goto end;
>             }
>         } else {
>             ret = AVERROR_UNKNOWN;
>             goto end;
>         }
>
>         /* Endpoints for the filter graph. */
>         outputs->name       = av_strdup("in");
>         outputs->filter_ctx = buffersrc_ctx;
>         outputs->pad_idx    = 0;
>         outputs->next       = NULL;
>
>         inputs->name       = av_strdup("out");
>         inputs->filter_ctx = buffersink_ctx;
>         inputs->pad_idx    = 0;
>         inputs->next       = NULL;
>
>         if (!outputs->name || !inputs->name) {
>             ret = AVERROR(ENOMEM);
>             goto end;
>         }
>
>         if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_spec,
>                         &inputs, &outputs, NULL)) < 0)
>             goto end;
>
>         if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
>             goto end;
>
>         /* Fill FilteringContext */
>         fctx->buffersrc_ctx = buffersrc_ctx;
>         fctx->buffersink_ctx = buffersink_ctx;
>         fctx->filter_graph = filter_graph;
>
>     end:
>         avfilter_inout_free(&inputs);
>         avfilter_inout_free(&outputs);
>
>         return ret;
>     }
>
>     static int init_filters(void)
>     {
>         const char *filter_spec;
>         unsigned int i;
>         int ret;
>         filter_ctx = av_malloc_array(ifmt_ctx->nb_streams, 
> sizeof(*filter_ctx));
>         if (!filter_ctx)
>             return AVERROR(ENOMEM);
>
>         for (i = 0; i < ifmt_ctx->nb_streams; i++) {
>             filter_ctx[i].buffersrc_ctx  = NULL;
>             filter_ctx[i].buffersink_ctx = NULL;
>             filter_ctx[i].filter_graph   = NULL;
>             if (!(ifmt_ctx->streams[i]->codec->codec_type == 
> AVMEDIA_TYPE_AUDIO
>                     || ifmt_ctx->streams[i]->codec->codec_type == 
> AVMEDIA_TYPE_VIDEO))
>                 continue;
>
>
>             if (ifmt_ctx->streams[i]->codec->codec_type == 
> AVMEDIA_TYPE_VIDEO)
>                 filter_spec = "null"; /* passthrough (dummy) filter 
> for video */
>             else
>                 filter_spec = "anull"; /* passthrough (dummy) filter 
> for audio */
>             ret = init_filter(&filter_ctx[i], ifmt_ctx->streams[i]->codec,
>                     ofmt_ctx->streams[i]->codec, filter_spec);
>             if (ret)
>                 return ret;
>         }
>         return 0;
>     }
>
>     static int encode_write_frame(AVFrame *filt_frame, unsigned int 
> stream_index, int *got_frame) {
>         int ret;
>         int got_frame_local;
>         AVPacket enc_pkt;
>         int (*enc_func)(AVCodecContext *, AVPacket *, const AVFrame *, 
> int *) =
> (ifmt_ctx->streams[stream_index]->codec->codec_type ==
>              AVMEDIA_TYPE_VIDEO) ? avcodec_encode_video2 : 
> avcodec_encode_audio2;
>
>         if (!got_frame)
>             got_frame = &got_frame_local;
>
>         av_log(NULL, AV_LOG_INFO, "Encoding frame\n");
>         /* encode filtered frame */
>         enc_pkt.data = NULL;
>         enc_pkt.size = 0;
>         av_init_packet(&enc_pkt);
>         ret = enc_func(ofmt_ctx->streams[stream_index]->codec, &enc_pkt,
>                 filt_frame, got_frame);
>         av_frame_free(&filt_frame);
>         if (ret < 0)
>             return ret;
>         if (!(*got_frame))
>             return 0;
>
>         /* prepare packet for muxing */
>         enc_pkt.stream_index = stream_index;
>         av_packet_rescale_ts(&enc_pkt,
> ofmt_ctx->streams[stream_index]->codec->time_base,
> ofmt_ctx->streams[stream_index]->time_base);
>
>         av_log(NULL, AV_LOG_DEBUG, "Muxing frame\n");
>         /* mux encoded frame */
>         ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt);
>         return ret;
>     }
>
>     static int filter_encode_write_frame(AVFrame *frame, unsigned int 
> stream_index)
>     {
>         int ret;
>         AVFrame *filt_frame;
>
>         av_log(NULL, AV_LOG_INFO, "Pushing decoded frame to filters\n");
>         /* push the decoded frame into the filtergraph */
>         ret = 
> av_buffersrc_add_frame_flags(filter_ctx[stream_index].buffersrc_ctx,
>                 frame, 0);
>         if (ret < 0) {
>             av_log(NULL, AV_LOG_ERROR, "Error while feeding the 
> filtergraph\n");
>             return ret;
>         }
>
>         /* pull filtered frames from the filtergraph */
>         while (1) {
>             filt_frame = av_frame_alloc();
>             if (!filt_frame) {
>                 ret = AVERROR(ENOMEM);
>                 break;
>             }
>             av_log(NULL, AV_LOG_INFO, "Pulling filtered frame from 
> filters\n");
>             ret = 
> av_buffersink_get_frame(filter_ctx[stream_index].buffersink_ctx,
>                     filt_frame);
>             if (ret < 0) {
>                 /* if no more frames for output - returns AVERROR(EAGAIN)
>                  * if flushed and no more frames for output - returns 
> AVERROR_EOF
>                  * rewrite retcode to 0 to show it as normal procedure 
> completion
>                  */
>                 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
>                     ret = 0;
>                 av_frame_free(&filt_frame);
>                 break;
>             }
>
>             filt_frame->pict_type = AV_PICTURE_TYPE_NONE;
>             ret = encode_write_frame(filt_frame, stream_index, NULL);
>             if (ret < 0)
>                 break;
>         }
>
>         return ret;
>     }
>
>     static int flush_encoder(unsigned int stream_index)
>     {
>         int ret;
>         int got_frame;
>
>         if 
> (!(ofmt_ctx->streams[stream_index]->codec->codec->capabilities &
>                     AV_CODEC_CAP_DELAY))
>             return 0;
>
>         while (1) {
>             av_log(NULL, AV_LOG_INFO, "Flushing stream #%u encoder\n", 
> stream_index);
>             ret = encode_write_frame(NULL, stream_index, &got_frame);
>             if (ret < 0)
>                 break;
>             if (!got_frame)
>                 return 0;
>         }
>         return ret;
>     }
>
>     int main(int argc, char **argv)
>     {
>         int ret;
>         AVPacket packet = { .data = NULL, .size = 0 };
>         AVFrame *frame = NULL;
>         enum AVMediaType type;
>         unsigned int stream_index;
>         unsigned int i;
>         int got_frame;
>         int (*dec_func)(AVCodecContext *, AVFrame *, int *, const 
> AVPacket *);
>
>         if (argc != 3) {
>             av_log(NULL, AV_LOG_ERROR, "Usage: %s <input file> <output 
> file>\n", argv[0]);
>             return 1;
>         }
>
>         av_register_all();
>         avfilter_register_all();
>         avformat_network_init();
>
>         if ((ret = open_input_file(argv[1])) < 0)
>             goto end;
>         if ((ret = open_output_file(argv[2])) < 0)
>             goto end;
>         if ((ret = init_filters()) < 0)
>             goto end;
>
>         /* read all packets */
>         while (1) {
>             if ((ret = av_read_frame(ifmt_ctx, &packet)) < 0)
>                 break;
>             stream_index = packet.stream_index;
>             type = 
> ifmt_ctx->streams[packet.stream_index]->codec->codec_type;
>             av_log(NULL, AV_LOG_DEBUG, "Demuxer gave frame of 
> stream_index %u\n",
>                     stream_index);
>
>             if (filter_ctx[stream_index].filter_graph) {
>                 av_log(NULL, AV_LOG_DEBUG, "Going to reencode&filter 
> the frame\n");
>                 frame = av_frame_alloc();
>                 if (!frame) {
>                     ret = AVERROR(ENOMEM);
>                     break;
>                 }
>                 av_packet_rescale_ts(&packet,
> ifmt_ctx->streams[stream_index]->time_base,
> ifmt_ctx->streams[stream_index]->codec->time_base);
>                 dec_func = (type == AVMEDIA_TYPE_VIDEO) ? 
> avcodec_decode_video2 :
>                     avcodec_decode_audio4;
>                 ret = dec_func(ifmt_ctx->streams[stream_index]->codec, 
> frame,
>                         &got_frame, &packet);
>                 if (ret < 0) {
>                     av_frame_free(&frame);
>                     av_log(NULL, AV_LOG_ERROR, "Decoding failed\n");
>                     break;
>                 }
>
>                 if (got_frame) {
>                     frame->pts = 
> av_frame_get_best_effort_timestamp(frame);
>                     ret = filter_encode_write_frame(frame, stream_index);
>                     av_frame_free(&frame);
>                     if (ret < 0)
>                         goto end;
>                 } else {
>                     av_frame_free(&frame);
>                 }
>             } else {
>                 /* remux this frame without reencoding */
>                 av_packet_rescale_ts(&packet,
> ifmt_ctx->streams[stream_index]->time_base,
> ofmt_ctx->streams[stream_index]->time_base);
>
>                 ret = av_interleaved_write_frame(ofmt_ctx, &packet);
>                 if (ret < 0)
>                     goto end;
>             }
>             av_packet_unref(&packet);
>         }
>
>         /* flush filters and encoders */
>         for (i = 0; i < ifmt_ctx->nb_streams; i++) {
>             /* flush filter */
>             if (!filter_ctx[i].filter_graph)
>                 continue;
>             ret = filter_encode_write_frame(NULL, i);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Flushing filter failed\n");
>                 goto end;
>             }
>
>             /* flush encoder */
>             ret = flush_encoder(i);
>             if (ret < 0) {
>                 av_log(NULL, AV_LOG_ERROR, "Flushing encoder failed\n");
>                 goto end;
>             }
>         }
>
>         av_write_trailer(ofmt_ctx);
>     end:
>         av_packet_unref(&packet);
>         av_frame_free(&frame);
>         for (i = 0; i < ifmt_ctx->nb_streams; i++) {
>             avcodec_close(ifmt_ctx->streams[i]->codec);
>             if (ofmt_ctx && ofmt_ctx->nb_streams > i && 
> ofmt_ctx->streams[i] && ofmt_ctx->streams[i]->codec)
> avcodec_close(ofmt_ctx->streams[i]->codec);
>             if (filter_ctx && filter_ctx[i].filter_graph)
> avfilter_graph_free(&filter_ctx[i].filter_graph);
>         }
>         av_free(filter_ctx);
>         avformat_close_input(&ifmt_ctx);
>         if (ofmt_ctx && !(ofmt_ctx->oformat->flags & AVFMT_NOFILE))
>             avio_closep(&ofmt_ctx->pb);
>         avformat_free_context(ofmt_ctx);
>
>         if (ret < 0)
>             av_log(NULL, AV_LOG_ERROR, "Error occurred: %s\n", 
> av_err2str(ret));
>
>         return ret ? 1 : 0;
>     }/
>
> When we run this we are getting this error:
>
> /    Input #0, rtsp, from 'rtsp://localhost:8554/live':
>       Metadata:
>         title           : Unnamed
>         comment         : N/A
>       Duration: N/A, start: 5294.642467, bitrate: N/A
>         Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 
> 640x480 [SAR 1:1 DAR 4:3], 30 fps, 30 tbr, 90k tbn, 60 tbc
>     [libx264 @ 0xe87c80] Specified pixel format -1 is invalid or not 
> supported
>     Cannot open video encoder for stream #0
>     codec : 28 and pix :12
>     Error occurred: Invalid argument/
>
> But I  could see that the correct pixel format  macro 
> "AV_PIX_FMT_YUV420P" is provided.
>
> Thanks
>
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
May I suggest to use instead, Red5 which can restream into an flv live 
on the server. It requires this plugin 
https://github.com/Red5/red5-rtsp-restreamer which was written for axis 
cameras specifically and can be modified to suit.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ffmpeg.org/pipermail/libav-user/attachments/20151121/eb61b25e/attachment.html>


More information about the Libav-user mailing list