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  #16  
Old October 11th 18, 03:25 PM posted to alt.windows7.general
JBI
external usenet poster
 
Posts: 51
Default question for the video editor folks

On 10/11/2018 04:25 AM, SC Tom wrote:


"JBI" wrote in message news
I have several videos I've transferred over from VHS to digital.* All
are in MPEG2 format.* I need to cut and edit some of them, but I'm
having trouble finding a free editor that does so without re-encoding.
Suggestions for freeware that would allow this without a re-encode
would be welcome.* Thank you.


I've used VideoPad Video Editor for a few years now. There is a free,
non commercial, home-use one. It just asks you each time you open it to
certify that you are using it for home use:

https://www.nchsoftware.com/videopad/index.html
A little bit under the picture is the line "Get it free." That's the one.

I still use an older version (4.14), and it looks like they're up 6.24
now. I have had no problems with the older version, so have not felt the
need to update what's already working just fine.


Thanks for this nice program! About the only alternative I've tried
that's still free and looks quite capable. Only one caveat: I am unable
to export the mpeg2 I'm trying to edit without re-encode. Apparently,
it has to be in one of their recommended input codec formats to edit
losslessly. Do you know if the older version is that way or not?

About the only thing I did end up doing was using Avidemux to edit. It
*seemed* to save without re encoding (still not sure), but output file
size seemed the same and it saved very fast. I did end up having to
save as a .ts file instead of mpeg, but so far it seems to play fine on
any of my players.

I guess I could save my edits to uncompressed AVI in Videopad and then
reopen and resave with a new format/ codec, but just too much work.
Never thought I'd have this much trouble with a simple mpeg2 edit and no
re encode with freeware!




As with most free programs, be careful what you click during the
installation or it will probably try to install a bunch of other crap.


Ads
  #17  
Old October 11th 18, 03:27 PM posted to alt.windows7.general
JBI
external usenet poster
 
Posts: 51
Default question for the video editor folks

On 10/09/2018 04:45 PM, Bill in Co wrote:
JBI wrote:
I have several videos I've transferred over from VHS to digital. All
are in MPEG2 format. I need to cut and edit some of them, but I'm
having trouble finding a free editor that does so without re-encoding.
Suggestions for freeware that would allow this without a re-encode would
be welcome. Thank you.


I did a search on the Internet and found some (using "free video cutter" as
the search phrase).

The first one that came up was Fast MPEG Cut, bu there were some others.
https://free-fast-mpeg-cut.en.uptodown.com/windows

Here is another one:

https://filehippo.com/download_free_...cutter_joiner/

Thanks. Tried both of those, but couldn't figure out how to cut, believe
it or not. They seemed to want to split, but that was it.


  #18  
Old October 11th 18, 05:59 PM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 7,567
Default question for the video editor folks

JBI wrote:
On 10/11/2018 04:25 AM, SC Tom wrote:


"JBI" wrote in message news
I have several videos I've transferred over from VHS to digital. All
are in MPEG2 format. I need to cut and edit some of them, but I'm
having trouble finding a free editor that does so without
re-encoding. Suggestions for freeware that would allow this without a
re-encode would be welcome. Thank you.


I've used VideoPad Video Editor for a few years now. There is a free,
non commercial, home-use one. It just asks you each time you open it
to certify that you are using it for home use:

https://www.nchsoftware.com/videopad/index.html
A little bit under the picture is the line "Get it free." That's the one.

I still use an older version (4.14), and it looks like they're up 6.24
now. I have had no problems with the older version, so have not felt
the need to update what's already working just fine.


Thanks for this nice program! About the only alternative I've tried
that's still free and looks quite capable. Only one caveat: I am unable
to export the mpeg2 I'm trying to edit without re-encode. Apparently,
it has to be in one of their recommended input codec formats to edit
losslessly. Do you know if the older version is that way or not?

About the only thing I did end up doing was using Avidemux to edit. It
*seemed* to save without re encoding (still not sure), but output file
size seemed the same and it saved very fast. I did end up having to
save as a .ts file instead of mpeg, but so far it seems to play fine on
any of my players.

I guess I could save my edits to uncompressed AVI in Videopad and then
reopen and resave with a new format/ codec, but just too much work.
Never thought I'd have this much trouble with a simple mpeg2 edit and no
re encode with freeware!


Videohelp has lists of programs. Scroll down after you
make a selection, to see the review for each program.
Use "find" in your browser and look for lossless.

https://www.videohelp.com/software/s...-editors-basic

Then, when you look at an individual item, there will be
comments from users.

https://www.videohelp.com/software/F...ns#downloadold

"The 1.4.13.805 version can still be downloaded from http://www.tucows.com/preview/1600233

However after giving it a pretty good try it seems that it does
not do frame accurate clipping after all! All it does is starts
the trimmed output block at a nearby keyframe and doesn't try to
do any "smart-rendering" to give you a few extra frames before
an existing keyframe.

So don't bother wasting your time with it, it provides no extra
functionality over free tools like avidemux (which as of version
2.6 also insists on starting an output block at a keyframe).

And that "smart rendering" term is good for searches too.
This is available as a trial-ware, but it could watermark
stuff - I wouldn't rely on the trial-ware declaration
as a free lunch :-)

https://www.videohelp.com/software/TMPGEnc-MPEG-Editor

TMPGEnc MPEG Smart Renderer 5 supports

MPEG-2 Video format which is used for DVD-Video
H.264/AVC format which is for websites such as YouTube
"H.265/HEVC" format which is newly supported

http://download1.pegasys-inc.com/dow...3_setup_en.exe

Paul
  #19  
Old October 11th 18, 06:08 PM posted to alt.windows7.general
Bill in Co
external usenet poster
 
Posts: 1,933
Default question for the video editor folks

Paul wrote:
JBI wrote:
On 10/11/2018 04:25 AM, SC Tom wrote:


"JBI" wrote in message news I have several videos I've transferred over from VHS to digital. All
are in MPEG2 format. I need to cut and edit some of them, but I'm
having trouble finding a free editor that does so without
re-encoding. Suggestions for freeware that would allow this without a
re-encode would be welcome. Thank you.

I've used VideoPad Video Editor for a few years now. There is a free,
non commercial, home-use one. It just asks you each time you open it
to certify that you are using it for home use:

https://www.nchsoftware.com/videopad/index.html
A little bit under the picture is the line "Get it free." That's the
one. I still use an older version (4.14), and it looks like they're up
6.24
now. I have had no problems with the older version, so have not felt
the need to update what's already working just fine.


Thanks for this nice program! About the only alternative I've tried
that's still free and looks quite capable. Only one caveat: I am unable
to export the mpeg2 I'm trying to edit without re-encode. Apparently,
it has to be in one of their recommended input codec formats to edit
losslessly. Do you know if the older version is that way or not?

About the only thing I did end up doing was using Avidemux to edit. It
*seemed* to save without re encoding (still not sure), but output file
size seemed the same and it saved very fast. I did end up having to
save as a .ts file instead of mpeg, but so far it seems to play fine on
any of my players.

I guess I could save my edits to uncompressed AVI in Videopad and then
reopen and resave with a new format/ codec, but just too much work.
Never thought I'd have this much trouble with a simple mpeg2 edit and no
re encode with freeware!


Videohelp has lists of programs. Scroll down after you
make a selection, to see the review for each program.
Use "find" in your browser and look for lossless.

https://www.videohelp.com/software/s...-editors-basic

Then, when you look at an individual item, there will be
comments from users.

https://www.videohelp.com/software/F...ns#downloadold

"The 1.4.13.805 version can still be downloaded from
http://www.tucows.com/preview/1600233
However after giving it a pretty good try it seems that it does
not do frame accurate clipping after all! All it does is starts
the trimmed output block at a nearby keyframe and doesn't try to
do any "smart-rendering" to give you a few extra frames before
an existing keyframe.

So don't bother wasting your time with it, it provides no extra
functionality over free tools like avidemux (which as of version
2.6 also insists on starting an output block at a keyframe).

And that "smart rendering" term is good for searches too.
This is available as a trial-ware, but it could watermark
stuff - I wouldn't rely on the trial-ware declaration
as a free lunch :-)

https://www.videohelp.com/software/TMPGEnc-MPEG-Editor

TMPGEnc MPEG Smart Renderer 5 supports

MPEG-2 Video format which is used for DVD-Video
H.264/AVC format which is for websites such as YouTube
"H.265/HEVC" format which is newly supported


http://download1.pegasys-inc.com/dow...3_setup_en.exe

Paul


I don't think he's going to find one that is free, Paul. I still think one
(or both) of the two I mentioned before might do it, but they are not free.
Here is my suggested list again:

SolveigMM Video Splitter
VideoReDo Plus (or even VideoReDo, for that matter)

I've used them both in the past, with pretty good results. :-)


  #20  
Old October 11th 18, 08:45 PM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 7,567
Default question for the video editor folks

Bill in Co wrote:
Paul wrote:
JBI wrote:
On 10/11/2018 04:25 AM, SC Tom wrote:

"JBI" wrote in message news I have several videos I've transferred over from VHS to digital. All
are in MPEG2 format. I need to cut and edit some of them, but I'm
having trouble finding a free editor that does so without
re-encoding. Suggestions for freeware that would allow this without a
re-encode would be welcome. Thank you.
I've used VideoPad Video Editor for a few years now. There is a free,
non commercial, home-use one. It just asks you each time you open it
to certify that you are using it for home use:

https://www.nchsoftware.com/videopad/index.html
A little bit under the picture is the line "Get it free." That's the
one. I still use an older version (4.14), and it looks like they're up
6.24
now. I have had no problems with the older version, so have not felt
the need to update what's already working just fine.
Thanks for this nice program! About the only alternative I've tried
that's still free and looks quite capable. Only one caveat: I am unable
to export the mpeg2 I'm trying to edit without re-encode. Apparently,
it has to be in one of their recommended input codec formats to edit
losslessly. Do you know if the older version is that way or not?

About the only thing I did end up doing was using Avidemux to edit. It
*seemed* to save without re encoding (still not sure), but output file
size seemed the same and it saved very fast. I did end up having to
save as a .ts file instead of mpeg, but so far it seems to play fine on
any of my players.

I guess I could save my edits to uncompressed AVI in Videopad and then
reopen and resave with a new format/ codec, but just too much work.
Never thought I'd have this much trouble with a simple mpeg2 edit and no
re encode with freeware!

Videohelp has lists of programs. Scroll down after you
make a selection, to see the review for each program.
Use "find" in your browser and look for lossless.

https://www.videohelp.com/software/s...-editors-basic

Then, when you look at an individual item, there will be
comments from users.

https://www.videohelp.com/software/F...ns#downloadold

"The 1.4.13.805 version can still be downloaded from
http://www.tucows.com/preview/1600233
However after giving it a pretty good try it seems that it does
not do frame accurate clipping after all! All it does is starts
the trimmed output block at a nearby keyframe and doesn't try to
do any "smart-rendering" to give you a few extra frames before
an existing keyframe.

So don't bother wasting your time with it, it provides no extra
functionality over free tools like avidemux (which as of version
2.6 also insists on starting an output block at a keyframe).

And that "smart rendering" term is good for searches too.
This is available as a trial-ware, but it could watermark
stuff - I wouldn't rely on the trial-ware declaration
as a free lunch :-)

https://www.videohelp.com/software/TMPGEnc-MPEG-Editor

TMPGEnc MPEG Smart Renderer 5 supports

MPEG-2 Video format which is used for DVD-Video
H.264/AVC format which is for websites such as YouTube
"H.265/HEVC" format which is newly supported


http://download1.pegasys-inc.com/dow...3_setup_en.exe

Paul


I don't think he's going to find one that is free, Paul. I still think one
(or both) of the two I mentioned before might do it, but they are not free.
Here is my suggested list again:

SolveigMM Video Splitter
VideoReDo Plus (or even VideoReDo, for that matter)

I've used them both in the past, with pretty good results. :-)


I mentioned earlier, that I'd seen at least one product
that promised to do smart render on more than one
file type. I posted this, so that person could
see such a thing exists.

Editing a video on GOP boundaries for MPEG2 only, isn't
the limit of the science. But for "frame accurate" editing
without re-rendering, the software still has to mess up
the contents of at least one GOP (up to 12 frames,
one would hope only 5 frames would get messed up).
Messed up means "recomputed and corrected" to mesh
with the GOP on either side. I've not seen any
critical reviews of how well this works. Whether
a discerning customer would choose to re-render
the whole thing, as a "better for quality" solution.

Another tiny detail for this stuff, is there is some
video encoding with bidirectional deltas. It's intended
to make smooth forward and reverse of video work
better. (It's a customer centric feature so people
will "like" how easy your video is to play with.)
Apparently that makes "frame accurate" "smart rendering"
all that much tougher, as now you have to mesh things
in both the forward and the reverse direction.

Some of this stuff, I just read in passing, when I'm working
on something else, and I'm "not taking notes" or anything :-)
I don't actually work with video very much.

Paul
  #21  
Old October 11th 18, 08:49 PM posted to alt.windows7.general
JBI
external usenet poster
 
Posts: 51
Default question for the video editor folks

On 10/11/2018 01:08 PM, Bill in Co wrote:
Paul wrote:
JBI wrote:
On 10/11/2018 04:25 AM, SC Tom wrote:


"JBI" wrote in message news I have several videos I've transferred over from VHS to digital. All
are in MPEG2 format. I need to cut and edit some of them, but I'm
having trouble finding a free editor that does so without
re-encoding. Suggestions for freeware that would allow this without a
re-encode would be welcome. Thank you.

I've used VideoPad Video Editor for a few years now. There is a free,
non commercial, home-use one. It just asks you each time you open it
to certify that you are using it for home use:

https://www.nchsoftware.com/videopad/index.html
A little bit under the picture is the line "Get it free." That's the
one. I still use an older version (4.14), and it looks like they're up
6.24
now. I have had no problems with the older version, so have not felt
the need to update what's already working just fine.

Thanks for this nice program! About the only alternative I've tried
that's still free and looks quite capable. Only one caveat: I am unable
to export the mpeg2 I'm trying to edit without re-encode. Apparently,
it has to be in one of their recommended input codec formats to edit
losslessly. Do you know if the older version is that way or not?

About the only thing I did end up doing was using Avidemux to edit. It
*seemed* to save without re encoding (still not sure), but output file
size seemed the same and it saved very fast. I did end up having to
save as a .ts file instead of mpeg, but so far it seems to play fine on
any of my players.

I guess I could save my edits to uncompressed AVI in Videopad and then
reopen and resave with a new format/ codec, but just too much work.
Never thought I'd have this much trouble with a simple mpeg2 edit and no
re encode with freeware!


Videohelp has lists of programs. Scroll down after you
make a selection, to see the review for each program.
Use "find" in your browser and look for lossless.

https://www.videohelp.com/software/s...-editors-basic

Then, when you look at an individual item, there will be
comments from users.

https://www.videohelp.com/software/F...ns#downloadold

"The 1.4.13.805 version can still be downloaded from
http://www.tucows.com/preview/1600233
However after giving it a pretty good try it seems that it does
not do frame accurate clipping after all! All it does is starts
the trimmed output block at a nearby keyframe and doesn't try to
do any "smart-rendering" to give you a few extra frames before
an existing keyframe.

So don't bother wasting your time with it, it provides no extra
functionality over free tools like avidemux (which as of version
2.6 also insists on starting an output block at a keyframe).

And that "smart rendering" term is good for searches too.
This is available as a trial-ware, but it could watermark
stuff - I wouldn't rely on the trial-ware declaration
as a free lunch :-)

https://www.videohelp.com/software/TMPGEnc-MPEG-Editor

TMPGEnc MPEG Smart Renderer 5 supports

MPEG-2 Video format which is used for DVD-Video
H.264/AVC format which is for websites such as YouTube
"H.265/HEVC" format which is newly supported


http://download1.pegasys-inc.com/dow...3_setup_en.exe

Paul


I don't think he's going to find one that is free, Paul. I still think one
(or both) of the two I mentioned before might do it, but they are not free.
Here is my suggested list again:

SolveigMM Video Splitter
VideoReDo Plus (or even VideoReDo, for that matter)

I've used them both in the past, with pretty good results. :-)


Thanks to Paul's suggestion, I did find one that worked called MPEG
Streamclip. I was able to do the cutting/ trimming and then using "save
as", according to the instructions, saves a copy of the original file.
In file comparisons, an unedited file imported into the program and then
"saved as" is the same size as the original.

As reviews suggested, editing can be rather rough as playing during
editing can be broken up, but forwarding to each correct keyframe and
then cutting produced perfect results.


  #22  
Old October 11th 18, 09:27 PM posted to alt.windows7.general
Keith Keith
external usenet poster
 
Posts: 15
Default question for the video editor folks

Hello JBI,

On 10/09/2018 04:45 PM, Bill in Co wrote:

JBI wrote:

I have several videos I've transferred over from VHS to digital.
All are in MPEG2 format. I need to cut and edit some of them, but
I'm having trouble finding a free editor that does so without
re-encoding. Suggestions for freeware that would allow this without
a re-encode would be welcome. Thank you.

I did a search on the Internet and found some (using "free video
cutter" as the search phrase).

The first one that came up was Fast MPEG Cut, bu there were some
others. https://free-fast-mpeg-cut.en.uptodown.com/windows

Here is another one:

https://filehippo.com/download_free_...cutter_joiner/

Thanks. Tried both of those, but couldn't figure out how to cut,
believe it or not. They seemed to want to split, but that was it.


Try https://www.nchsoftware.com/videopad/


  #23  
Old October 12th 18, 11:41 AM posted to alt.windows7.general
NY
external usenet poster
 
Posts: 546
Default question for the video editor folks

"Paul" wrote in message
news
Editing a video on GOP boundaries for MPEG2 only, isn't
the limit of the science. But for "frame accurate" editing
without re-rendering, the software still has to mess up
the contents of at least one GOP (up to 12 frames,
one would hope only 5 frames would get messed up).
Messed up means "recomputed and corrected" to mesh
with the GOP on either side. I've not seen any
critical reviews of how well this works. Whether
a discerning customer would choose to re-render
the whole thing, as a "better for quality" solution.


I can confirm that VideoRedo manages frame-accurate edits, with no
discernable loss of picture quality (eg macroblock pixellation or JPEG
fringing) around the edit point, irrespective of whether the edit points are
on GOP boundaries. The only exception that I have found to this is for
low-bitrate and low-resolution channels (544x576 rather than 720x576, at 1
Mbps) when *by default* there can be a few frames with corruption - but
there is a fix which imposes a minimum bitrate (I use 2 Mbps) for any
regenerated frames.

To the best of my knowledge, the first frame of the second clip is generated
as a full frame by calculation from the last full frame before the edit
point plus any difference frames, and then new difference frames are
generated from that point onwards to the next full frame in the source.

I would say that as long as the new frames are free of any blemishes, this
is a much better solution than re-rendering the whole project, both because
it is faster and because you don't lose any quality in recoding any more
frames than you have to.

I would expect all similar software to adopt this approach; I was rather
gobsmacked to see how bad AVIdemux was at joining two videos when the join
isn't on a GOP boundary - very bad macroblock pixellation.

  #24  
Old October 12th 18, 06:57 PM posted to alt.windows7.general
pjp[_10_]
external usenet poster
 
Posts: 1,078
Default question for the video editor folks

In article ,
says...

"Paul" wrote in message
news
Editing a video on GOP boundaries for MPEG2 only, isn't
the limit of the science. But for "frame accurate" editing
without re-rendering, the software still has to mess up
the contents of at least one GOP (up to 12 frames,
one would hope only 5 frames would get messed up).
Messed up means "recomputed and corrected" to mesh
with the GOP on either side. I've not seen any
critical reviews of how well this works. Whether
a discerning customer would choose to re-render
the whole thing, as a "better for quality" solution.


I can confirm that VideoRedo manages frame-accurate edits, with no
discernable loss of picture quality (eg macroblock pixellation or JPEG
fringing) around the edit point, irrespective of whether the edit points are
on GOP boundaries. The only exception that I have found to this is for
low-bitrate and low-resolution channels (544x576 rather than 720x576, at 1
Mbps) when *by default* there can be a few frames with corruption - but
there is a fix which imposes a minimum bitrate (I use 2 Mbps) for any
regenerated frames.

To the best of my knowledge, the first frame of the second clip is generated
as a full frame by calculation from the last full frame before the edit
point plus any difference frames, and then new difference frames are
generated from that point onwards to the next full frame in the source.

I would say that as long as the new frames are free of any blemishes, this
is a much better solution than re-rendering the whole project, both because
it is faster and because you don't lose any quality in recoding any more
frames than you have to.

I would expect all similar software to adopt this approach; I was rather
gobsmacked to see how bad AVIdemux was at joining two videos when the join
isn't on a GOP boundary - very bad macroblock pixellation.


I'm unsure why no one has mentioned using VirtualDub. I often strip the
start/ends of video files and that's pretty straightforward doing a
direct stream copy. Mind you it'd be a bit of a pain to get all the junk
stripped out of say an hour long tv show but it'd do it and I believe
that it can be done without re-encoding. Putting the peices back
together is trivial.
  #25  
Old October 12th 18, 07:09 PM posted to alt.windows7.general
JBI
external usenet poster
 
Posts: 51
Default question for the video editor folks

On 10/12/2018 01:57 PM, pjp wrote:
In article ,
says...

"Paul" wrote in message
news
Editing a video on GOP boundaries for MPEG2 only, isn't
the limit of the science. But for "frame accurate" editing
without re-rendering, the software still has to mess up
the contents of at least one GOP (up to 12 frames,
one would hope only 5 frames would get messed up).
Messed up means "recomputed and corrected" to mesh
with the GOP on either side. I've not seen any
critical reviews of how well this works. Whether
a discerning customer would choose to re-render
the whole thing, as a "better for quality" solution.


I can confirm that VideoRedo manages frame-accurate edits, with no
discernable loss of picture quality (eg macroblock pixellation or JPEG
fringing) around the edit point, irrespective of whether the edit points are
on GOP boundaries. The only exception that I have found to this is for
low-bitrate and low-resolution channels (544x576 rather than 720x576, at 1
Mbps) when *by default* there can be a few frames with corruption - but
there is a fix which imposes a minimum bitrate (I use 2 Mbps) for any
regenerated frames.

To the best of my knowledge, the first frame of the second clip is generated
as a full frame by calculation from the last full frame before the edit
point plus any difference frames, and then new difference frames are
generated from that point onwards to the next full frame in the source.

I would say that as long as the new frames are free of any blemishes, this
is a much better solution than re-rendering the whole project, both because
it is faster and because you don't lose any quality in recoding any more
frames than you have to.

I would expect all similar software to adopt this approach; I was rather
gobsmacked to see how bad AVIdemux was at joining two videos when the join
isn't on a GOP boundary - very bad macroblock pixellation.


I'm unsure why no one has mentioned using VirtualDub. I often strip the
start/ends of video files and that's pretty straightforward doing a
direct stream copy. Mind you it'd be a bit of a pain to get all the junk
stripped out of say an hour long tv show but it'd do it and I believe
that it can be done without re-encoding. Putting the peices back
together is trivial.


I use Virtualdub on a regular basis. This time, however, it wouldn't
handle these MPEG2 files. I'm not sure the original did anyway and I
think I had to use Virtualdubmod. Even then, it wouldn't take them.
  #26  
Old October 12th 18, 09:13 PM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 7,567
Default question for the video editor folks

JBI wrote:
On 10/12/2018 01:57 PM, pjp wrote:
In article ,
says...

"Paul" wrote in message
news Editing a video on GOP boundaries for MPEG2 only, isn't
the limit of the science. But for "frame accurate" editing
without re-rendering, the software still has to mess up
the contents of at least one GOP (up to 12 frames,
one would hope only 5 frames would get messed up).
Messed up means "recomputed and corrected" to mesh
with the GOP on either side. I've not seen any
critical reviews of how well this works. Whether
a discerning customer would choose to re-render
the whole thing, as a "better for quality" solution.

I can confirm that VideoRedo manages frame-accurate edits, with no
discernable loss of picture quality (eg macroblock pixellation or JPEG
fringing) around the edit point, irrespective of whether the edit
points are
on GOP boundaries. The only exception that I have found to this is for
low-bitrate and low-resolution channels (544x576 rather than 720x576,
at 1
Mbps) when *by default* there can be a few frames with corruption - but
there is a fix which imposes a minimum bitrate (I use 2 Mbps) for any
regenerated frames.

To the best of my knowledge, the first frame of the second clip is
generated
as a full frame by calculation from the last full frame before the edit
point plus any difference frames, and then new difference frames are
generated from that point onwards to the next full frame in the source.

I would say that as long as the new frames are free of any blemishes,
this
is a much better solution than re-rendering the whole project, both
because
it is faster and because you don't lose any quality in recoding any more
frames than you have to.

I would expect all similar software to adopt this approach; I was rather
gobsmacked to see how bad AVIdemux was at joining two videos when the
join
isn't on a GOP boundary - very bad macroblock pixellation.


I'm unsure why no one has mentioned using VirtualDub. I often strip the
start/ends of video files and that's pretty straightforward doing a
direct stream copy. Mind you it'd be a bit of a pain to get all the junk
stripped out of say an hour long tv show but it'd do it and I believe
that it can be done without re-encoding. Putting the peices back
together is trivial.


I use Virtualdub on a regular basis. This time, however, it wouldn't
handle these MPEG2 files. I'm not sure the original did anyway and I
think I had to use Virtualdubmod. Even then, it wouldn't take them.


What was the source of the files ?

From the ffmpeg package, you could try

ffprobe some.mpg

and one thing it will dump, is a list of the
streams in the file. My digital TV card just dumps
ATSC packets without modification, and there can be
five streams in the file (the stream lineup varies with
TV station). This confuses some tools,
and requires stream arguments which select a video
and an audio file from the master file, to work on.

Paul
 




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