int ff_mov_init_hinting(AVFormatContext *s, int index, int src_index) { MOVMuxContext *mov = s->priv_data; MOVTrack *track = &mov->tracks[index]; MOVTrack *src_track = &mov->tracks[src_index]; AVStream *src_st = s->streams[src_index]; int ret = AVERROR(ENOMEM); AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL); track->tag = MKTAG('r','t','p',' '); track->src_track = src_index; if (!rtp_format) { ret = AVERROR(ENOENT); goto fail; } track->enc = avcodec_alloc_context(); if (!track->enc) goto fail; track->enc->codec_type = AVMEDIA_TYPE_DATA; track->enc->codec_tag = track->tag; track->rtp_ctx = avformat_alloc_context(); if (!track->rtp_ctx) goto fail; track->rtp_ctx->oformat = rtp_format; if (!av_new_stream(track->rtp_ctx, 0)) goto fail; /* Copy stream parameters */ track->rtp_ctx->streams[0]->sample_aspect_ratio = src_st->sample_aspect_ratio; /* Remove the allocated codec context, link to the original one * instead, to give the rtp muxer access to codec parameters. */ av_free(track->rtp_ctx->streams[0]->codec); track->rtp_ctx->streams[0]->codec = src_st->codec; if ((ret = url_open_dyn_packet_buf(&track->rtp_ctx->pb, RTP_MAX_PACKET_SIZE)) < 0) goto fail; ret = av_write_header(track->rtp_ctx); if (ret) goto fail; /* Copy the RTP AVStream timebase back to the hint AVStream */ track->timescale = track->rtp_ctx->streams[0]->time_base.den; /* Mark the hinted track that packets written to it should be * sent to this track for hinting. */ src_track->hint_track = index; return 0; fail: av_log(s, AV_LOG_WARNING, "Unable to initialize hinting of stream %d\n", src_index); if (track->rtp_ctx && track->rtp_ctx->pb) { uint8_t *buf; url_close_dyn_buf(track->rtp_ctx->pb, &buf); av_free(buf); } if (track->rtp_ctx && track->rtp_ctx->streams[0]) { av_metadata_free(&track->rtp_ctx->streams[0]->metadata); av_free(track->rtp_ctx->streams[0]); } if (track->rtp_ctx) { av_metadata_free(&track->rtp_ctx->metadata); av_free(track->rtp_ctx->priv_data); av_freep(&track->rtp_ctx); } av_freep(&track->enc); /* Set a default timescale, to avoid crashes in dump_format */ track->timescale = 90000; return ret; }