Hi
I am trying to encode to FLV with H264 and AAC. I am manually encoding
each frame as a key frame and specifying a PTS value for that frame. The
problem is that when I play back the FLV through FLVPlayer/VLC the last
5 frames seem to be missing even though I am encoding delayed frames,
the strange thing is that the file plays fine through FFPlay and Media
Player Classic.
I include a version of the method I am using to encode, it's not that
big do I haven't used PasteBin (hope that's OK). Any help would be
appreciated.
I am using the following Codec setup:
c = st->codec;
c->codec_id = codec_id;
c->codec_type = AVMEDIA_TYPE_VIDEO;
c->bit_rate=400000;
c->time_base.num=1;
c->time_base.den=1000;
c->gop_size=0;
c->height=height;
c->width=width;
c->max_b_frames=0;
c->max_qdiff=4;
c->me_range=5;
c->qmin=20;
c->qmax=30;
c->qcompress=0.6;
c->trellis=0;
c->level=13; //Level 1.3
c->profile=66; //Baseline
c->me_method=7;
c->thread_count=2;
c->qblur=0.1f;
c->pix_fmt=STREAM_PIX_FMT; //YUV420P
c->flags = CODEC_FLAG_LOW_DELAY;
And here is my method:
void FLVAuditTranscoder::TranscodeJPEGFrame(array<unsigned char>^
data, AVFormatContext *oc, AVStream *st, double timeStampInMilliseconds)
{
AVFrame* pFrame = avcodec_alloc_frame();
int finished = 0;
pin_ptr<unsigned char> dataSegment = &data[0];
int size = data->Length;
int len = avcodec_decode_video(imageContext, pFrame,
&finished, dataSegment, size);
if (finished > 0)
{
int out_size, ret;
AVCodecContext *c;
static struct SwsContext *img_convert_ctx;
c = st->codec;
//pFrame->pts = timeStamp;
c->coded_frame->pts = timeStamp;
out_size = avcodec_encode_video(c, video_outbuf,
video_outbuf_size, pFrame);
/* if zero size, it means the image was buffered */
if (out_size > 0)
{
AVPacket pkt;
av_init_packet(&pkt);
if (c->coded_frame->pts != AV_NOPTS_VALUE)
pkt.pts = av_rescale_q(c->coded_frame->pts,
c->time_base, st->time_base);
if(c->coded_frame->key_frame)
pkt.flags |= AV_PKT_FLAG_KEY;
pkt.stream_index= st->index;
pkt.data= video_outbuf;
pkt.size= out_size;
/* write the compressed frame in the media file */
ret = av_interleaved_write_frame(oc, &pkt);
}
else
ret = 0;
if (ret != 0)
{
fprintf(stderr, "Error while writing video frame\n");
exit(1);
}
}
}
Thanks,
Mark.
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