DV timing information

Dave1024 · 10th March 2012, 10:24

hi,

Is there any timing information available with DV compressed frame data like MPEG-2 GOP header ?

Is it possible any VITC/ATC time information embedded in a frame along with Luma samples ?

Thanks
Dave

LoRd_MuldeR · 11th March 2012, 20:54

AFAIK, on the PC, DV streams are almost always stored in an AVI container.

And AVI is CFR (constant frame rate), which means AVI uses a fixed frame-rate, specified in the AVI Stream Header.

Therefore you don't need timing info, such as timestamps. The time index of the n-th frame simple is n * fps.

Gavino · 12th March 2012, 10:16

Quote:

Originally Posted by LoRd_MuldeR

The time index of the n-th frame simple is n * fps.

You mean n / fps.

2Bdecided · 12th March 2012, 12:43

Quote:

Originally Posted by Dave1024

Is it possible any VITC/ATC time information embedded in a frame along with Luma samples ?

The recording date+time is usually preserved in the file. No idea how, but plenty of tools use it (e.g. to overlay date+time on video after capturing).

Cheers,
David.

Dave1024 · 14th March 2012, 19:04

Hi,

Thanks for the replay's, i would like to explore the DV more. Which is the standard for explore the DV codec. ?
Is there any SMPTE 12 M timecode is compressed in DV codec.?
Is there any VBI lines is compressed in DV codec ?

Thanks
Dave

IanB · 14th March 2012, 22:36

This filter reveals the metadata in a DV stream, New Filter: DVInfo

This seems to be a version for the newer HDV format, HDVInfo v0.93

Dave1024 · 18th March 2012, 10:41

Hi,

Is it possible to map VITC (vertical interval time code) to DV. Which are the parameters helps to detect this ?

Thanks
Dave

Guest · 18th March 2012, 14:17

I answered a very similar question in your other thread, but now you act as if you didn't read it or didn't understand it.

10th March 2012, 10:24	#1 \| Link
Dave1024 Registered User Join Date: Apr 2008 Location: US Posts: 105	DV timing information hi, Is there any timing information available with DV compressed frame data like MPEG-2 GOP header ? Is it possible any VITC/ATC time information embedded in a frame along with Luma samples ? Thanks Dave

11th March 2012, 20:54	#2 \| Link
LoRd_MuldeR Software Developer Join Date: Jun 2005 Location: Last House on Slunk Street Posts: 13,248	AFAIK, on the PC, DV streams are almost always stored in an AVI container. And AVI is CFR (constant frame rate), which means AVI uses a fixed frame-rate, specified in the AVI Stream Header. Therefore you don't need timing info, such as timestamps. The time index of the n-th frame simple is n fps. __________________ Go to https://standforukraine.com/ to find legitimate Ukrainian Charities 🇺🇦✊* Last edited by LoRd_MuldeR; 11th March 2012 at 23:47.

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14th March 2012, 19:04	#5 \| Link
Dave1024 Registered User Join Date: Apr 2008 Location: US Posts: 105	Hi, Thanks for the replay's, i would like to explore the DV more. Which is the standard for explore the DV codec. ? Is there any SMPTE 12 M timecode is compressed in DV codec.? Is there any VBI lines is compressed in DV codec ? Thanks Dave

14th March 2012, 22:36	#6 \| Link
IanB Avisynth Developer Join Date: Jan 2003 Location: Melbourne, Australia Posts: 3,167	This filter reveals the metadata in a DV stream, New Filter: DVInfo This seems to be a version for the newer HDV format, HDVInfo v0.93

18th March 2012, 10:41	#7 \| Link
Dave1024 Registered User Join Date: Apr 2008 Location: US Posts: 105	Hi, Is it possible to map VITC (vertical interval time code) to DV. Which are the parameters helps to detect this ? Thanks Dave

18th March 2012, 14:17	#8 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	I answered a very similar question in your other thread, but now you act as if you didn't read it or didn't understand it.