MPEG4 encoder video_object_type_indication wrong initialization

selea — Thu, 03 May 2012 15:31:54 GMT

Hi all, I recently found that in the function

Ipp32s ippVideoEncoderMPEG4::Init(mp4_Param *par)

called during the initialization of the MPEG4 encoder there's this line

VOL.video_object_type_indication = 0; //MP4_VIDEO_OBJECT_TYPE_SIMPLE;

this cause the function "EncodeVOL_Header" to put in the MPEG4 header the field "video_object_type_indication" to 0 that is (Reserved). A correct value could be for example theMP4_VIDEO_OBJECT_TYPE_SIMPLE( value is 1) that is commented out.

The problem is that I found no way to change this parameter from the outside, I have to change the source code.

The value 0 cause some rtsp player (like QuickTime) to fail decoding the video stream: this happen because the config string is sent to the client in the rtsp negotiation and if I send the config string generated by the MPEG4 endcoder withvideo_object_type_indication = 0 QuickTime fail to decode.

why there is this line "VOL.video_object_type_indication = 0; //MP4_VIDEO_OBJECT_TYPE_SIMPLE;" ??

how can I change thevideo_object_type_indication from outside?

thanks

MPEG4 encoder video_object_type_indication wrong initialization

selea — Mon, 07 May 2012 08:51:03 GMT

If I use VLC player to decode a MPEG4 stream encoded withvideo_object_type_indication = 0 the debug console warn me that the stream is probably decoded with an older version of divx or xvid

MPEG4 encoder video_object_type_indication wrong initialization

selea — Fri, 08 Jun 2012 12:34:31 GMT

Do you think ther's a way to change it without hard coding on the source?

topic MPEG4 encoder video_object_type_indication wrong initialization in Intel® Integrated Performance Primitives

MPEG4 encoder video_object_type_indication wrong initialization

MPEG4 encoder video_object_type_indication wrong initialization

MPEG4 encoder video_object_type_indication wrong initialization