int av_packet_ref(AVPacket *dst, const AVPacket *src) { int ret; ret = av_packet_copy_props(dst, src); if (ret < 0) return ret; if (!src->buf) { ret = packet_alloc(&dst->buf, src->size); if (ret < 0) goto fail; memcpy(dst->buf->data, src->data, src->size); dst->data = dst->buf->data; } else { dst->buf = av_buffer_ref(src->buf); if (!dst->buf) { ret = AVERROR(ENOMEM); goto fail; } dst->data = src->data; } dst->size = src->size; return 0; fail: av_packet_free_side_data(dst); return ret; }