how to cut the .ts files accurately

jujiananren · 12th June 2009, 03:17

I wanna cut the .ts files losslessly and accurately.I've tryed the TSSplitter,but the beginning and the ending time of the clip it gets is not exactly the time I set. Is there any good suggestion?

ps:VideoReDo is very good but it does not support vc-1 and h264.Any better suggestion?

LUCHOO · 12th June 2009, 06:15

you can try VideoRedo

Quote:

Works with many formats
MPEG1, MPEG2, Transport Streams (.ts), Windows MCE DVRMS files, Siemens M740AV .CRID files, and Topfield .rec files. The result is that VideoReDo TVSuite works with the widest variety of TV PVR and DVR formats.

Adub · 12th June 2009, 06:52

You can't cut 'em losslessly. Your stream is 99% likely to be made up of p or b frames, which require some kind of reference. Thus, if you wan to cut, and you want it to be on a specific frame, you will have to encode. There is hope, as you can encode to a lossless format, such as Huffyuv, but you will still have to encode.

The only way you can cut without re-encoding is by cutting on the keyframes, which are not "accurate", as they can be several 10's-100's of frames apart. Sorry man.

jujiananren · 12th June 2009, 08:38

thanks for your professional answer,Adub

LUCHOO · 12th June 2009, 12:43

maybe be interested:

Quote:

Why do I need frame accurate editing?
Because if you don't have frame accurate editing, you will not be able to specify the exact cut points resulting in a very chopped looking edit. You will either remove wanted program material, or leave in parts you did not want.

Frames in an MPEG compressed video are not stored sequentially and most frames are stored simply as changes from some prior frame. Without VideoReDo's special capabilities, the only place you can cut safely is on a GOP boundary. A GOP boundary is where MPEG has encoded a complete frame. Depending upon your source material, GOP boundaries occur every 1/2 to 4 seconds.

12th June 2009, 16:59

Yes but that's not really truly lossless cutting as it re-encodes those sections in between the keyframes, but the vast majority of the video remains untouched though.

laserfan · 12th June 2009, 18:28

If VideoReDo's frame-accurate editing has to re-construct a GOP around a cut-point (which it only does if it's not an I-frame) and the end result is a perfect edit, who cares whether this is not "truly lossless"?

@ the OP if you want absolutely perfect cuts of MPEG2 (HD or SD) at any frame in the video, then VRD may be worth the money to you.

12th June 2009, 20:24

Quote:

Originally Posted by laserfan

If VideoReDo's frame-accurate editing has to re-construct a GOP around a cut-point (which it only does if it's not an I-frame) and the end result is a perfect edit, who cares whether this is not "truly lossless"?

It isn't that big a deal but I just wanted to point it out to the OP so that they know.

jujiananren · 16th June 2009, 13:25

VideoReDo not support vc-1 and h264.oh my....

12th June 2009, 03:17	#1 \| Link
jujiananren Registered User Join Date: Feb 2008 Posts: 17	how to cut the .ts files accurately I wanna cut the .ts files losslessly and accurately.I've tryed the TSSplitter,but the beginning and the ending time of the clip it gets is not exactly the time I set. Is there any good suggestion? ps:VideoReDo is very good but it does not support vc-1 and h264.Any better suggestion? Last edited by jujiananren; 16th June 2009 at 13:27.

12th June 2009, 06:52	#3 \| Link
Adub Fighting spam with a fish Join Date: Sep 2005 Posts: 2,687	You can't cut 'em losslessly. Your stream is 99% likely to be made up of p or b frames, which require some kind of reference. Thus, if you wan to cut, and you want it to be on a specific frame, you will have to encode. There is hope, as you can encode to a lossless format, such as Huffyuv, but you will still have to encode. The only way you can cut without re-encoding is by cutting on the keyframes, which are not "accurate", as they can be several 10's-100's of frames apart. Sorry man. __________________ FAQs:Bond's AVC/H.264 FAQ Site:Adubvideo

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12th June 2009, 08:38	#4 \| Link
jujiananren Registered User Join Date: Feb 2008 Posts: 17	thanks for your professional answer,Adub

12th June 2009, 16:59	#6 \| Link
Gokumon Guest Posts: n/a	Yes but that's not really truly lossless cutting as it re-encodes those sections in between the keyframes, but the vast majority of the video remains untouched though.

12th June 2009, 18:28	#7 \| Link
laserfan Aging Video Hobbyist Join Date: Dec 2004 Location: Off the Map Posts: 2,461	If VideoReDo's frame-accurate editing has to re-construct a GOP around a cut-point (which it only does if it's not an I-frame) and the end result is a perfect edit, who cares whether this is not "truly lossless"? @ the OP if you want absolutely perfect cuts of MPEG2 (HD or SD) at any frame in the video, then VRD may be worth the money to you.

16th June 2009, 13:25	#9 \| Link
jujiananren Registered User Join Date: Feb 2008 Posts: 17	VideoReDo not support vc-1 and h264.oh my....