static int mpeg4video_probe(AVProbeData *probe_packet) { uint32_t temp_buffer= -1; int VO=0, VOL=0, VOP = 0, VISO = 0, res=0; int i; for(i=0; i<probe_packet->buf_size; i++){ temp_buffer = (temp_buffer<<8) + probe_packet->buf[i]; if ((temp_buffer & 0xffffff00) != 0x100) continue; if (temp_buffer == VOP_START_CODE) VOP++; else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++; else if (temp_buffer < 0x120) VO++; else if (temp_buffer < 0x130) VOL++; else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7) && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++; } if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0) return VOP+VO > 4 ? AVPROBE_SCORE_EXTENSION : AVPROBE_SCORE_EXTENSION/2; return 0; }