static int flv_write_packet(AVFormatContext *s, AVPacket *pkt) { AVIOContext *pb = s->pb; AVCodecContext *enc = s->streams[pkt->stream_index]->codec; FLVContext *flv = s->priv_data; FLVStreamContext *sc = s->streams[pkt->stream_index]->priv_data; unsigned ts; int size = pkt->size; uint8_t *data = NULL; int flags = 0, flags_size; if (enc->codec_id == AV_CODEC_ID_VP6F || enc->codec_id == AV_CODEC_ID_VP6A || enc->codec_id == AV_CODEC_ID_AAC) flags_size = 2; else if (enc->codec_id == AV_CODEC_ID_H264) flags_size = 5; else flags_size = 1; if (flv->delay == AV_NOPTS_VALUE) flv->delay = -pkt->dts; if (pkt->dts < -flv->delay) { av_log(s, AV_LOG_WARNING, "Packets are not in the proper order with respect to DTS\n"); return AVERROR(EINVAL); } ts = pkt->dts + flv->delay; // add delay to force positive dts if (s->event_flags & AVSTREAM_EVENT_FLAG_METADATA_UPDATED) { write_metadata(s, ts); s->event_flags &= ~AVSTREAM_EVENT_FLAG_METADATA_UPDATED; } switch (enc->codec_type) { case AVMEDIA_TYPE_VIDEO: avio_w8(pb, FLV_TAG_TYPE_VIDEO); flags = enc->codec_tag; if (flags == 0) { av_log(s, AV_LOG_ERROR, "video codec %X not compatible with flv\n", enc->codec_id); return -1; } flags |= pkt->flags & AV_PKT_FLAG_KEY ? FLV_FRAME_KEY : FLV_FRAME_INTER; break; case AVMEDIA_TYPE_AUDIO: flags = get_audio_flags(s, enc); assert(size); avio_w8(pb, FLV_TAG_TYPE_AUDIO); break; case AVMEDIA_TYPE_DATA: avio_w8(pb, FLV_TAG_TYPE_META); break; default: return AVERROR(EINVAL); } if (enc->codec_id == AV_CODEC_ID_H264) /* check if extradata looks like MP4 */ if (enc->extradata_size > 0 && *(uint8_t*)enc->extradata != 1) if (ff_avc_parse_nal_units_buf(pkt->data, &data, &size) < 0) return -1; /* check Speex packet duration */ if (enc->codec_id == AV_CODEC_ID_SPEEX && ts - sc->last_ts > 160) av_log(s, AV_LOG_WARNING, "Warning: Speex stream has more than " "8 frames per packet. Adobe Flash " "Player cannot handle this!\n"); if (sc->last_ts < ts) sc->last_ts = ts; avio_wb24(pb, size + flags_size); avio_wb24(pb, ts); avio_w8(pb, (ts >> 24) & 0x7F); // timestamps are 32 bits _signed_ avio_wb24(pb, flv->reserved); if (enc->codec_type == AVMEDIA_TYPE_DATA) { int data_size; int64_t metadata_size_pos = avio_tell(pb); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "onTextData"); avio_w8(pb, AMF_DATA_TYPE_MIXEDARRAY); avio_wb32(pb, 2); put_amf_string(pb, "type"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, "Text"); put_amf_string(pb, "text"); avio_w8(pb, AMF_DATA_TYPE_STRING); put_amf_string(pb, pkt->data); put_amf_string(pb, ""); avio_w8(pb, AMF_END_OF_OBJECT); /* write total size of tag */ data_size = avio_tell(pb) - metadata_size_pos; avio_seek(pb, metadata_size_pos - 10, SEEK_SET); avio_wb24(pb, data_size); avio_seek(pb, data_size + 10 - 3, SEEK_CUR); avio_wb32(pb, data_size + 11); } else { avio_w8(pb,flags); if (enc->codec_id == AV_CODEC_ID_VP6F || enc->codec_id == AV_CODEC_ID_VP6A) { if (enc->extradata_size) avio_w8(pb, enc->extradata[0]); else avio_w8(pb, ((FFALIGN(enc->width, 16) - enc->width) << 4) | (FFALIGN(enc->height, 16) - enc->height)); } else if (enc->codec_id == AV_CODEC_ID_AAC) avio_w8(pb, 1); // AAC raw else if (enc->codec_id == AV_CODEC_ID_H264) { avio_w8(pb, 1); // AVC NALU avio_wb24(pb, pkt->pts - pkt->dts); } avio_write(pb, data ? data : pkt->data, size); avio_wb32(pb, size + flags_size + 11); // previous tag size flv->duration = FFMAX(flv->duration, pkt->pts + flv->delay + pkt->duration); } av_free(data); return pb->error; }