for (uint32_t i = 0; i < h->short_ref_count; i++) { H264Picture *pic = h->short_ref[i]; av_log(h->avctx, AV_LOG_DEBUG, "%"PRIu32" fn:%d poc:%d %p\n", i, pic->frame_num, pic->poc, pic->f->data[0]); }
source code in ffmpeg