[Libav-user] avpacket data padding and alignment

YIRAN LI mrfun.china at gmail.com
Mon Apr 16 05:07:52 EEST 2018

Hi guys,

I know if I call av_new_packet then the data buffer created will be padded
and aligned.

But how if I only use ffmpeg to do the muxing?

Say if I get a buffer with size n.  My code looks like this.

   AVPacket pkt;
   ZeroMemory(&pkt, sizeof(pkt));
   pkt.stream_index = myindex;
   pkt.pts = myPTS;
   pkt.data = myPtr; (points to a buffer allocated in my program)
   pkt.size = mySize;
   av_write_frame(pFormatCtx, &pkt)

Is above code OK? or do I need to allocate pkt.data with padding +
alignment and copy my data into it?

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