Cant decode mpeg-4 stream with xvid_decraw
Daniela Rainer <[email protected]> Wed, 22 Oct 2003 22:04:08 +0200
| Newsgroups | gmane.comp.video.xvid.user |
|---|---|
| Organization | Vircinity GmbH |
| Message-ID | <[email protected]> |
Hi all, we want to develop an application where a video stream from a camera is sent via IP to an application which maps it as video texture onto 3D geometry. As we don't have the camera yet, the camera manufacturer send as a captured stream, which should be "MPEG-4 (ISO/IEC 14496)". I tried ./xvid_decraw -w 352 -h 288 -t 0 -i myfile.mp4 but it fails while reading the header. It doesn't find a startcode (debug delivers <unknown: 1f9> while reading the start_code). As the file itself is 500K, I tried to produce a hexdump: dd if=myfile.mp4 bs=1 count=1000 | od -t x -A x 1000+0 records in 1000+0 records out 000000 cfcfd0cf d0d0cfd0 d0cfcfcf cfcfd0d0 000010 cfcfcfcf cfd0d1cf cdcfd2cf cfd0cfce 000020 d2d2d2cf d2d1cfd0 d0d0d0d0 d0cfcfcf 000030 d1d1d0d1 d1d0cfd0 cfd0d0d1 d0d0cfd0 000040 cfcfcfd0 cecfcece d0cfcfcf cfcfcfcf 000050 cfcfcece d0cfcece cfcececf cecfcfcf 000060 cfcfcfce cececfce cfcfcfcf ced0cfd0 000070 d0d0cfcf cfd0cfcf cfcfcfd0 cfd0cfcf 000080 cfcfd0cf cfcfcfcf d0cfcfd0 cfcfd0d0 000090 d1d0cfcf cfcfcfd0 cdcecfcf cfd0d0d0 0000a0 d0cfd0cf cecfcfcf cfd1d0d0 cfd1d0d0 0000b0 d1d0d0cf cfcfd1d1 d0d0d2d1 d2d1d1d1 0000c0 d2cecfd2 cfd1d1cf d1d2d2d0 d1cfd0d0 0000d0 cfd1cfcf cfd1d2d0 d0d1d0d0 d0cfcfcf I'm not familiar with mpeg-4, but maybe one of you can see the problem? Thanks for any ideas, Best Regards Daniela -- ------------------------------------------------------------------------- Daniela Rainer | email: [email protected] Vircinity GmbH | http://www.vircinity.com Nobelstrasse 15, 70550 Stuttgart | Tel: +49 (0) 711 6864534 22 GERMANY | Fax: +49 (0) 711 6864534 99