trouble demuxing mpeg2 video with tmpgenc 2.5

[tonemgub]

I am having some trouble demuxing an mpeg2 video. I converted an xvid avi to an mpeg2 single mpg file. The problem is when I demux it my 23.976fps video stream always gets converted to ~29fps. Same thing happens when I tried converting the avi directly to mpeg2 elementary streams. In each case the video plays too fast and off sync with the audio. The only way it will stay synced is if I keep it as a single mpeg2 file.

[Forum Troll]

sorry..forum error.

[Forum Troll]

sorry...forum error

[Forum Troll]

You most likely need to go into the Advanced options and tick the "3:2 pulldown" option.

[tonemgub]

it is perfectly synced when in one mpg file only when I demux it it gets off sync i dont understand why i would use 3:2 pulldown when i hover over that it says "converts 24 fps to 30fps / 60 field" i want to keep 23.976 fps. Any other suggestions?

[Abond]

Then... keep it!
You should not use wizard or templates to keep it.

[tonemgub]

i need it demuxed though

[Abond]

Let's sort the things. You have mpeg2 at 23.976 and when you demux it with TMPG the m2v becomes 29.97. Is that so?
Then use ReJig to demux it.

[tonemgub]

same thing happens

here is some info gspot gives me about the file i'm trying to demux

FILE_NAME                      x
FILE_NAME_WITH_PATH            x
FILE_SIZE                      513,417,220
CONT_BASETYPE                  MPEG (.MPG/.MPEG/.VOB)
CONT_SUBTYPE                   
CONT_INTERLEAVE_TIME           
CONT_INTERLEAVE_PRELOAD        
CONT_INTERLEAVE_ALIGN          
CONT_TOTAL_BITRATE             1555
CONT_BYTES_MISSING             
CONT_AUDIO_STREAM_COUNT        1
VIDEO_CODEC_TYPE               MPEG2_Video
VIDEO_CODEC_NAME               MPEG-2
VIDEO_CODEC_STATUS             Codec(s) are Installed
VIDEO_DURATION                 00:44:12
VIDEO_FRAME_COUNT              79487
VIDEO_QF                       0.135
VIDEO_SIZE_X                   720
VIDEO_SIZE_Y                   480
VIDEO_DISPLAY_SIZE_X           
VIDEO_DISPLAY_SIZE_Y           
VIDEO_ASPECT_DECIMAL           
VIDEO_ASPECT_FRAC              
VIDEO_PICS_PER_SEC             23.976
VIDEO_FRAMES_PER_SEC           29.970
VIDEO_FIELDS_PER_SEC           59.939
VIDEO_BITRATE                  1400
VIDEO_MPEG4                    
VIDEO_MPEG4_BVOP               
VIDEO_MPEG4_NVOP               
VIDEO_MPEG4_QPEL               
VIDEO_MPEG4_GMC                
VIDEO_H264                     
VIDEO_SAR                      
VIDEO_DAR                      1.333
VIDEO_MPEG2                    MPEG-2
VIDEO_MPEG2_I_L                I/L
VIDEO_MPEG2_PROG               
VIDEO_MPEG2_TFF                
VIDEO_MPEG2_BFF

i know it says VIDEO_FRAMES_PER_SEC = 29.970 but mpc says it plays at 23.98

[Abond]

Ph-h this is cause your mpeg is pulldowned. See GSpot says 23.976 pictures per sec. So MPC play it 23.976 pictures per second - it doesn't take in account the pulldown flags. The problem here is that you have desynch with the audio - this should not be. . Hmm, how to explain better - your video has exactly so many frames as the source. Some of them have been marked with "repeat-field flag" (rff). This flag tell to settop dvd player to repeat some fields in order to display 59.939 fields per second (1 frame = 2 fields) = 29.97 frames per second total. This is the DVD and SVCD NTSC standard.
Now, you must look at the video duration to match the audio duration.
BTW, is the asynch constant or increasing?
Several questions - what (and how) you are using to play the demultiplexed file to analyse the desynch?
What are you using to look for the framerate of the demuxed file?

[tonemgub]

I kind of understand but the problem is that when I play the demuxed files in mpc the video plays really fast and that is why the audio is not in sync with it. It looks like the frames aren't getting repeated like they are supposed to. Is there a way to fix this?

and to answer your bottom questions im using mpc for both

[Abond]

Yes. Multiplex them.

and to answer your bottom questions im using mpc for both

This is wrong IMO. Use better GSpot to analyse the framerate and duration. About the desynch use always multiplexed files.

[reboot]

Try PVAStrumento to demux.

[SatStorm]

I second that