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6th January 2010, 18:57 | #1 | Link |
Useless idea generator
Join Date: Apr 2004
Location: Europe, Czech Republic, Brno
Posts: 332
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Q: Using DGIndex timestamp analysis to create AVsync time map
Is there a ready or easy to use way to create any kind of A/V sync time map, based of timestamp analysis in DGIndex ?
AFAI understand, the Timestamp analysis show AV shift at MPEG2 key frames, but question is framenumber or timestamp of all listed key frames. It looks to me key frames in MPEG2 are very frequent, every 12 frames (recorded by Leadtek winfast II, checked by virtualDub). But I do not know if it is constant and a rule. My DVB-T captures show often piecewise AV out of sync, usually needed to fix by piecewise audio delay , or encoding directly DVR-MS with usage of autoresyncing DirectShowSource. I want to create a av sync shift timemap, e.g. in Excel, and generate by a script a serie of AVS trims, with different parameters for audiodelay and/or timestretch AVS functions. ( ProjectX or PVAStrumento ofte does not help it fixing AV sync of corrupted MPEGs, converted from DVR-MS ).
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Vista64 Premium SP2 / C2D E4700 2.6GHz/ 6GB RAM/ Intel GMA 3100 / DTV Leadtek DONGLE GOLD USB2 / focused to DVB-T MPEG2 PS capture -> ProjectX -> M2V/MP2 -> MeGUI/AVS -> MP4[AVC/AAC] Last edited by Poutnik; 7th January 2010 at 18:39. Reason: corrected key frames observed frequency |
11th January 2010, 07:21 | #2 | Link |
Useless idea generator
Join Date: Apr 2004
Location: Europe, Czech Republic, Brno
Posts: 332
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Interesting is DGIndex timestamp comparison of original MPG PS,
this time without big sync jumps, and MPG PS after PVAStrumento fixing. On X axis is key frame order number.
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Vista64 Premium SP2 / C2D E4700 2.6GHz/ 6GB RAM/ Intel GMA 3100 / DTV Leadtek DONGLE GOLD USB2 / focused to DVB-T MPEG2 PS capture -> ProjectX -> M2V/MP2 -> MeGUI/AVS -> MP4[AVC/AAC] |
17th June 2011, 01:18 | #3 | Link | |
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Join Date: Feb 2011
Posts: 1
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Quote:
It's far from being a user-friendly tool (being a command-line tool and requiring you to know your way around Avisynth...) but then video editing seems to have a lot of this :/ |
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dgindex, sync, timestamps |
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