[Libav-user] av_packet_get_side_data() not working

[Nicolas George]

rohit khali (12020-06-23):
> I am using av_parser_parse2() to construct one H264 frame.
> av_parser_parse2(parser, c, &pkt->data, &pkt->size,
>                                    data, data_size, AV_NOPTS_VALUE,
> AV_NOPTS_VALUE, 0);
> 
> Now, I am trying to use the below code to extract AV_PKT_DATA_A53_CC data.
> However av_packet_get_side_data() is unable to detect the presence of CC
> present in the pkt,
>                 //Extract side_data
>                 uint8_t *streaminfo;
>                 int streaminfo_size;
>                 /* check for updated streaminfo */
>                 //
>                 streaminfo = av_packet_get_side_data(pkt,
> AV_PKT_DATA_A53_CC,
>                                                     &streaminfo_size);
>                 if (streaminfo && streaminfo_size) {
>                     printf("AV_PKT_DATA_A53_CC found \n");
>                 }
> At the same time, av_frame_get_side_data(frame, AV_FRAME_DATA_A53_CC) works
> fine.
> 
> Any idea, what am I missing in above code?

The side data is not present in the packet, the closed captions are
encoded in the bitstream, it needs to be decoded.

Regards,

-- 
  Nicolas George

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