From Newsgroup: comp.sys.mac.system

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean interaction like this.

Any aid appreciated.


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From Newsgroup: comp.sys.mac.system

On Nov 12, 2020, gtr wrote
(in article <rojmhs$eqc$1@dont-email.me>):

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean interaction like this.

Any aid appreciated.

You haven’t mentioned the type of video file, or the source (recording device, sometimes the manufacturer provides proprietary editing software).

Since you have a Mac you already have something which will do the job, but not quite as simply as "*type in a starting time code and and ending time code*” You will have to do a bit of editing.

Quicktime Player (Edit->Trim, etc.)
iMovie

...and if you want to up your game a tad there is the free *DaVinci Resolve* which does require climbing a learning curve.

--
Regards,
Savageduck

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From Newsgroup: comp.sys.mac.system

On 2020-11-12 17:57:19 +0000, Savageduck said:

On Nov 12, 2020, gtr wrote
(in article <rojmhs$eqc$1@dont-email.me>):

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean
interaction like this.

Any aid appreciated.

You haven’t mentioned the type of video file, or the source (recording device, sometimes the manufacturer provides proprietary editing
software).

Any file format that will let me type in timings.

Since you have a Mac you already have something which will do the job,
but not quite as simply as "*type in a starting time code and and
ending time code*” You will have to do a bit of editing.

And that's the only consideration that has me asking the question here.
I have three or four ways to do it I want to spend 20 minutes with a
mouse.

Quicktime Player (Edit->Trim, etc.)
iMovie

Right, and Screenflow and a few others.

...and if you want to up your game a tad there is the free *DaVinci
Resolve* which does require climbing a learning curve.

I have it and it does indeed look like a lot of preliminary study. Do
you know if it will
let me type in timings?

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From Newsgroup: comp.sys.mac.system

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time code*, and have it spit out the clip into separate file.

ffmpeg is your friend.

ffmpeg -i input.mov -ss 00:15:12 -t 00:00:30 -acodec copy -vcodec copy output.mov

Only difference is that you specify start time (ss) and duration (t)
instead of end time. It is the swiss army knife of handling video files
and formats.

It is open source and there are binaries available for OS-X (sorry don't
have link handy).


You can then use bash to create a script to process the list of files
you need.


(I think it is able to concatenate 2 video files but not sure).
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From Newsgroup: comp.sys.mac.system

On 2020-11-12, gtr <xxx@yyy.zzz> wrote:

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean interaction like this.

Any aid appreciated.

Sounds like a job for a script to me.

You can use the -ss and -to switches with the ffmpeg command-line tool
to trim video files with time codes. Read the manual for details and
examples. There are also plenty of tutorials on the web about it.

It would relatively trivial to write a little script (AppleScript, Ruby,
Perl, shell, whatever) that reads a list of video names/paths along with
the appropriate time codes from a text file and then invoke ffmpeg with
the right parameters to do the splicing.

--
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-12 19:17:01 +0000, JF Mezei said:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file.

ffmpeg is your friend.

ffmpeg -i input.mov -ss 00:15:12 -t 00:00:30 -acodec copy -vcodec copy
output.mov

Only difference is that you specify start time (ss) and duration (t)
instead of end time. It is the swiss army knife of handling video files
and formats.

I'm well aware of it, and thought I recalled a UI that made it easily
done. I even went and purchased FF-Works to make it more accessible,
but couldn't manage to find it in there anywhere.

It is open source and there are binaries available for OS-X (sorry don't
have link handy).

You can then use bash to create a script to process the list of files
you need.

(I think it is able to concatenate 2 video files but not sure).

I see "merge", so assume it can do that as well, but it's not what I'm
looking for just now. Thanks!

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From Newsgroup: comp.sys.mac.system

On 2020-11-12, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file.

ffmpeg is your friend.

ffmpeg -i input.mov -ss 00:15:12 -t 00:00:30 -acodec copy -vcodec
copy output.mov

Only difference is that you specify start time (ss) and duration (t)
instead of end time.

The -to switch lets you specify an end time.

--
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-12 19:50:16 +0000, Jolly Roger said:

On 2020-11-12, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file.

ffmpeg is your friend.

ffmpeg -i input.mov -ss 00:15:12 -t 00:00:30 -acodec copy -vcodec
copy output.mov

Only difference is that you specify start time (ss) and duration (t)
instead of end time.

The -to switch lets you specify an end time.

Cool!

--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-12 19:26:48 +0000, Jolly Roger said:

On 2020-11-12, gtr <xxx@yyy.zzz> wrote:

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean
interaction like this.

Any aid appreciated.

Sounds like a job for a script to me.

You can use the -ss and -to switches with the ffmpeg command-line tool
to trim video files with time codes. Read the manual for details and examples. There are also plenty of tutorials on the web about it.

It would relatively trivial to write a little script (AppleScript, Ruby, Perl, shell, whatever) that reads a list of video names/paths along with
the appropriate time codes from a text file and then invoke ffmpeg with
the right parameters to do the splicing.

That might be a good educational project for the Autumn.


--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

In message <rojmhs$eqc$1@dont-email.me> gtr <xxx@yyy.zzz> wrote:

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean interaction like this.

I do this via the command line with ffmpeg

#v+
ffmpeg -i infile.mp4 -ss START -to END outfile.mp4
#v-


--
"Why do you wear that stupid bunny suit?" "Why are you wearing that
stupid man suit?"
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time code*, and have it spit out the clip into separate file.  I need to feed
it 30 or more such files, culling 4 portions of video from each, all of
them at different times, so it has to be a realitively clean interaction like this.

Handbrake does that - perhaps not to "time code" level, but at least to seconds or frames in whatever range you need.

--
"...there are many humorous things in this world; among them the white
man's notion that he is less savage than the other savages."
-Samuel Clemens
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-13 16:36:11 +0000, Alan Browne said:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file.� I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean
interaction like this.

Handbrake does that - perhaps not to "time code" level, but at least to seconds or frames in whatever range you need.

I thought it did too! But I can't seem to find it. Can you point me there?

I don't need time precision anyway, all such clips will be joined for a
rough cut anyway.

--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-13 10:22:07 +0000, Lewis said:

In message <rojmhs$eqc$1@dont-email.me> gtr <xxx@yyy.zzz> wrote:

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean
interaction like this.

I do this via the command line with ffmpeg

#v+
ffmpeg -i infile.mp4 -ss START -to END outfile.mp4
#v-

I heard that upstream and appreciate it. There the command is somewhat different from yours:

ffmpeg -i input.mov -ss START -t LENGTH -acodec copy -vcodec copy output.mov


--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-13, gtr <xxx@yyy.zzz> wrote:

On 2020-11-13 10:22:07 +0000, Lewis said:

In message <rojmhs$eqc$1@dont-email.me> gtr <xxx@yyy.zzz> wrote:

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean
interaction like this.

I do this via the command line with ffmpeg

#v+
ffmpeg -i infile.mp4 -ss START -to END outfile.mp4
#v-

I heard that upstream and appreciate it. There the command is somewhat different from yours:

ffmpeg -i input.mov -ss START -t LENGTH -acodec copy -vcodec copy output.mov

You can choose which to use based on your needs:

* The -t switch is for specifying the length of the clip.
* The -to switch is for specifying the end time.

The "-*codec copy" switch just enables this optional feature:

---
Stream copy

Stream copy is a mode selected by supplying the "copy" parameter to the
-codec option. It makes ffmpeg omit the decoding and encoding step for
the specified stream, so it does only demuxing and muxing. It is useful
for changing the container format or modifying container-level metadata.

The diagram above will, in this case, simplify to this:

_______ ______________ ________
| | | | | |
| input | demuxer | encoded data | muxer | output |
| file | ---------> | packets | -------> | file |
|_______| |______________| |________|

Since there is no decoding or encoding, it is very fast and there is no
quality loss. However, it might not work in some cases because of many
factors. Applying filters is obviously also impossible, since filters
work on uncompressed data.
---
Reference: ffmpeg manual

--
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR
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From Newsgroup: comp.sys.mac.system

On 2020-11-13 21:06:53 +0000, Jolly Roger said:

On 2020-11-13, gtr <xxx@yyy.zzz> wrote:

On 2020-11-13 10:22:07 +0000, Lewis said:

In message <rojmhs$eqc$1@dont-email.me> gtr <xxx@yyy.zzz> wrote:

I'm looking for an app or utility, that will allow me to do the following: >>>
Feed it a video file, *type in a starting time code and and ending time >>>> code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean
interaction like this.

I do this via the command line with ffmpeg

#v+
ffmpeg -i infile.mp4 -ss START -to END outfile.mp4
#v-

I heard that upstream and appreciate it. There the command is somewhat
different from yours:

ffmpeg -i input.mov -ss START -t LENGTH -acodec copy -vcodec copy output.mov

You can choose which to use based on your needs:

* The -t switch is for specifying the length of the clip.
* The -to switch is for specifying the end time.

The "-*codec copy" switch just enables this optional feature:

---
Stream copy

Stream copy is a mode selected by supplying the "copy" parameter to the -codec option. It makes ffmpeg omit the decoding and encoding step for
the specified stream, so it does only demuxing and muxing. It is useful
for changing the container format or modifying container-level metadata.

The diagram above will, in this case, simplify to this:

_______ ______________ ________
| | | | | |
| input | demuxer | encoded data | muxer | output |
| file | ---------> | packets | -------> | file |
|_______| |______________| |________|

Since there is no decoding or encoding, it is very fast and there is no quality loss. However, it might not work in some cases because of many factors. Applying filters is obviously also impossible, since filters
work on uncompressed data.
---
Reference: ffmpeg manual

Excllent info. Thanks for that.

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From Newsgroup: comp.sys.mac.system

On 2020-11-13 15:24, gtr wrote:

On 2020-11-13 16:36:11 +0000, Alan Browne said:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the
following:

Feed it a video file, *type in a starting time code and and ending
time code*, and have it spit out the clip into separate file.  I need
to feed it 30 or more such files, culling 4 portions of video from
each, all of them at different times, so it has to be a realitively
clean interaction like this.

Handbrake does that - perhaps not to "time code" level, but at least
to seconds or frames in whatever range you need.

I thought it did too!  But I can't seem to find it.  Can you point me there?

Google (whatever) "Handbrake". Can't miss it.

Ah, what the hell: https://handbrake.fr/


--
"...there are many humorous things in this world; among them the white
man's notion that he is less savage than the other savages."
-Samuel Clemens
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

In message <0CyrH.662407$%p.518313@fx33.iad> Alan Browne <bitbucket@blackhole.com> wrote:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file.  I need to feed >> it 30 or more such files, culling 4 portions of video from each, all of
them at different times, so it has to be a realitively clean interaction
like this.

Handbrake does that - perhaps not to "time code" level, but at least to seconds or frames in whatever range you need.

I believe that Handbrake *always* re-encodes the video. ffmpeg can be
made to copy exactly what you want without degrading it.

--
A lot of people and the smell of sausages meant a performance of the
street theatre that was life in Ankh-Morpork.
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

In message <romq5u$rub$3@dont-email.me> gtr <xxx@yyy.zzz> wrote:

On 2020-11-13 10:22:07 +0000, Lewis said:

In message <rojmhs$eqc$1@dont-email.me> gtr <xxx@yyy.zzz> wrote:

I'm looking for an app or utility, that will allow me to do the following: >>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file. I need to
feed it 30 or more such files, culling 4 portions of video from each,
all of them at different times, so it has to be a realitively clean
interaction like this.

I do this via the command line with ffmpeg

#v+
ffmpeg -i infile.mp4 -ss START -to END outfile.mp4
#v-

I heard that upstream and appreciate it. There the command is somewhat different from yours:

ffmpeg -i input.mov -ss START -t LENGTH -acodec copy -vcodec copy output.mov

There are many many (hundreds?) of options that you can add to ffmpeg

Here is a recent commandline:

ffmpeg -i maskred.mp3 -ss 42 -metadata author="Edgar Allan Poe" -metadata album="The Masque of the Red Death" -metadata comment="The story follows Prince Prospero's attempts to avoid a dangerous plague, known as the Red Death, by hiding in his abbey. He, along with many other wealthy nobles, hosts a masquerade ball in seven rooms of the abbey, each decorated with a different color. In the midst of their revelry, a mysterious figure disguised as a Red Death victim enters and makes his way through each of the rooms." -b:a 128K -c:a aac "The Masque of the Red Death.m4b"

or this

for i in *; do ffmpeg -n -f concat -safe 0 -i <(for f in $i/*.mp3; do echo "file '$PWD/$f'"; done) -metadata title="$i" -vn -c:a aac -b:a 64K $i.m4a ; done

or

ffmpeg -i rolf.mp4 -ss 8:37 -to 8:41 rolf2.mp4

or

ffmpeg -i Witches\ 01.mp3 -i Witches\ 02.mp3 -i Witches\ 03.mp3 -i Witches\ 04.mp3 -i Witches\ 05.mp3 -i Witches\ 06.mp3 -i Witches\ 07.mp3 -metadata title="Witches" -metadata comment-"Recorded 16 Jul 1999" Witches.mp3

(just pulled from my `history`)

--
When this kiss is over it will start again But not be any different
could be exactly the same It's hard to imagine that nothing at
all Could be so exciting, could be this much fun
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From Newsgroup: comp.sys.mac.system

On 2020-11-14 00:38:26 +0000, Alan Browne said:

On 2020-11-13 15:24, gtr wrote:

On 2020-11-13 16:36:11 +0000, Alan Browne said:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>>>
Feed it a video file, *type in a starting time code and and ending time >>>> code*, and have it spit out the clip into separate file.� I need to
feed it 30 or more such files, culling 4 portions of video from each, >>>> all of them at different times, so it has to be a realitively clean
interaction like this.

Handbrake does that - perhaps not to "time code" level, but at least to >>> seconds or frames in whatever range you need.

I thought it did too!� But I can't seem to find it.� Can you point me there?

Google (whatever) "Handbrake". Can't miss it.

Ah, what the hell: https://handbrake.fr/

I have the program, I've looked for the option. I can't see it.

--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-14 00:59:50 +0000, Lewis said:

In message <0CyrH.662407$%p.518313@fx33.iad> Alan Browne <bitbucket@blackhole.com> wrote:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file.� I need to feed >>> it 30 or more such files, culling 4 portions of video from each, all of
them at different times, so it has to be a realitively clean interaction >>> like this.

Handbrake does that - perhaps not to "time code" level, but at least to
seconds or frames in whatever range you need.

I believe that Handbrake *always* re-encodes the video. ffmpeg can be
made to copy exactly what you want without degrading it.

And yet I continue looking for a way to cull a subset by time code.

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From Newsgroup: comp.sys.mac.system

note: I have found that by using -vcodec h264 and -acodec ac3 or aac
with ffmpeg will used up mega CPU and is slower. BUT: by going frame be
frame, it can start the copy operation at the precise time you specified
for both video and audio. If you don't specify it, the operation is
much faster, but the output may be without sound until it hits the next keyframe, same with video.

This matters when you really want precise start of the output video.
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-14 01:46, gtr wrote:

Ah, what the hell: https://handbrake.fr/

I have the program, I've looked for the option. I can't see it.

After you open a movie, look near the top of the movie pane for:

Angle Range Chapters 1 xx Duration nn:nn:nn

Change chapters to Seconds and you can then specify start and end
seconds. You'll need to convert a time value into seconds though.
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

In message <ronuho$4g5$2@dont-email.me> gtr <xxx@yyy.zzz> wrote:

On 2020-11-14 00:59:50 +0000, Lewis said:

In message <0CyrH.662407$%p.518313@fx33.iad> Alan Browne
<bitbucket@blackhole.com> wrote:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>>>
Feed it a video file, *type in a starting time code and and ending time >>>> code*, and have it spit out the clip into separate file.  I need to feed >>>> it 30 or more such files, culling 4 portions of video from each, all of >>>> them at different times, so it has to be a realitively clean interaction >>>> like this.

Handbrake does that - perhaps not to "time code" level, but at least to
seconds or frames in whatever range you need.

I believe that Handbrake *always* re-encodes the video. ffmpeg can be
made to copy exactly what you want without degrading it.

And yet I continue looking for a way to cull a subset by time code.

And still, ffmpeg does exactly that with -ss START -to END

-ss 1:14:34.5 -to 1:14:39

will give you the give seconds from the 1 hour 14 minute and 34 and one
half second mark to the 1 hour 14 minute and 39 second mark with some
margin for slop based on keyframes, depending on the encode.

--
"Hain't we got all the fools in town on our side? And hain't that a
big enough majority in any town?" - Huckleberry Finn
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-13 19:59, Lewis wrote:

In message <0CyrH.662407$%p.518313@fx33.iad> Alan Browne <bitbucket@blackhole.com> wrote:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following: >>>
Feed it a video file, *type in a starting time code and and ending time
code*, and have it spit out the clip into separate file.  I need to feed >>> it 30 or more such files, culling 4 portions of video from each, all of
them at different times, so it has to be a realitively clean interaction >>> like this.

Handbrake does that - perhaps not to "time code" level, but at least to
seconds or frames in whatever range you need.

I believe that Handbrake *always* re-encodes the video. ffmpeg can be
made to copy exactly what you want without degrading it.

That's so, but with correct settings the difference will be
imperceptible. In terms of setting it up, easier for those who are not comfortable in CLI.

--
"...there are many humorous things in this world; among them the white
man's notion that he is less savage than the other savages."
-Samuel Clemens
--- Synchronet 3.18b-Win32 NewsLink 1.113

From Newsgroup: comp.sys.mac.system

On 2020-11-14 10:35, Jolly Roger wrote:

On 2020-11-14, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:

note: I have found that by using -vcodec h264 and -acodec ac3 or aac
with ffmpeg will used up mega CPU and is slower.

That's because you are instructing ffmpeg to re-encode with those codecs rather than "-*codec copy" which streams the content as-is and is much
faster as a result.

Opposite: I found that by forcing the re-encode, I got the output video
to start 100% OK at the time mark. When you don't do this via the
"copy", it starts to copy frame information at the right frane, but the
output video contains "out of context" compressed data for the first
frames because it doesn't start with a keyframe.

When you force re-encode, t has in memory a full frame for each frame so
when it gets to desired start frame, it has a full frame to begin with
and can then continue with only changes to each frame until the next
keyframe.

Same with audio.
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On 2020-11-14, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:

On 2020-11-14 10:35, Jolly Roger wrote:

On 2020-11-14, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:

note: I have found that by using -vcodec h264 and -acodec ac3 or aac
with ffmpeg will used up mega CPU and is slower.

That's because you are instructing ffmpeg to re-encode with those codecs
rather than "-*codec copy" which streams the content as-is and is much
faster as a result.

Opposite

Nope. Everything I said above is true.

--
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR
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In message <eJUrH.1184696$DO2.419180@fx45.iad> JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:

On 2020-11-14 10:35, Jolly Roger wrote:

On 2020-11-14, JF Mezei <jfmezei.spamnot@vaxination.ca> wrote:

note: I have found that by using -vcodec h264 and -acodec ac3 or aac
with ffmpeg will used up mega CPU and is slower.

That's because you are instructing ffmpeg to re-encode with those codecs
rather than "-*codec copy" which streams the content as-is and is much
faster as a result.

Opposite: I found that by forcing the re-encode, I got the output video
to start 100% OK at the time mark. When you don't do this via the
"copy", it starts to copy frame information at the right frane, but the output video contains "out of context" compressed data for the first
frames because it doesn't start with a keyframe.

This is because you don't know what you are doing.

--
Up the airy mountains, down the rushy glen... From ghosties and
bogles and long-leggity beasties... My mother said I never
should... We dare not go a-hunting for fear... And things that go
bump... Play with the fairies in the wood... --Lords and Ladies
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On 2020-11-14 09:30:28 +0000, JF Mezei said:

On 2020-11-14 01:46, gtr wrote:

Ah, what the hell: https://handbrake.fr/

I have the program, I've looked for the option. I can't see it.

After you open a movie, look near the top of the movie pane for:

Angle Range Chapters 1 xx Duration nn:nn:nn

Change chapters to Seconds and you can then specify start and end
seconds. You'll need to convert a time value into seconds though.

Yes! Bravo!

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On 2020-11-14 14:56:33 +0000, Alan Browne said:

On 2020-11-14 01:46, gtr wrote:

On 2020-11-14 00:38:26 +0000, Alan Browne said:

On 2020-11-13 15:24, gtr wrote:

On 2020-11-13 16:36:11 +0000, Alan Browne said:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the following:

Feed it a video file, *type in a starting time code and and ending time >>>>>> code*, and have it spit out the clip into separate file.� I need to >>>>>> feed it 30 or more such files, culling 4 portions of video from each, >>>>>> all of them at different times, so it has to be a realitively clean >>>>>> interaction like this.

Handbrake does that - perhaps not to "time code" level, but at least to >>>>> seconds or frames in whatever range you need.

I thought it did too!� But I can't seem to find it.� Can you point me there?

Google (whatever) "Handbrake".� Can't miss it.

Ah, what the hell: https://handbrake.fr/

I have the program, I've looked for the option. I can't see it.

Where it says "Range". You can set it to "Chapters", "Seconds",
"Frames" and then enter the appropriate info for that option.

V 1.2.2 is what I have.
V 1.3.3 is the latest.

V 1.0.7 contains a trojan. Do not run it if you have it.

I have 1.3.3 as well. Why do you hang with 1.2.2?

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On 2020-11-15 11:46, gtr wrote:

On 2020-11-14 14:56:33 +0000, Alan Browne said:

On 2020-11-14 01:46, gtr wrote:

On 2020-11-14 00:38:26 +0000, Alan Browne said:

On 2020-11-13 15:24, gtr wrote:

On 2020-11-13 16:36:11 +0000, Alan Browne said:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the >>>>>>> following:

Feed it a video file, *type in a starting time code and and
ending time code*, and have it spit out the clip into separate
file.  I need to feed it 30 or more such files, culling 4
portions of video from each, all of them at different times, so >>>>>>> it has to be a realitively clean interaction like this.

Handbrake does that - perhaps not to "time code" level, but at
least to seconds or frames in whatever range you need.

I thought it did too!  But I can't seem to find it.  Can you point >>>>> me there?

Google (whatever) "Handbrake".  Can't miss it.

Ah, what the hell: https://handbrake.fr/

I have the program, I've looked for the option. I can't see it.

Where it says "Range".  You can set it to "Chapters", "Seconds",
"Frames" and then enter the appropriate info for that option.

V 1.2.2 is what I have.
V 1.3.3 is the latest.

V 1.0.7 contains a trojan.  Do not run it if you have it.

I have 1.3.3 as well.  Why do you hang with 1.2.2?

I had no reason to upgrade it. It's no different under the hood. But
due to this discussion I have updated it to 1.3.3 and so far all I see
is a better queue display with the information on a particular clip in
the right pane whereas before you had to click-open from the queue line.

I've never been one to update s/w just because. There has to be a
compelling reason. A bug. An important security fix. A desirable feature.

For that matter on a large conversion project I wrote a program to drive HandbrakeCLI and manage the backup of the resulting files.

--
"...there are many humorous things in this world; among them the white
man's notion that he is less savage than the other savages."
-Samuel Clemens
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From Newsgroup: comp.sys.mac.system

In message <ybdsH.541482$HY4.453352@fx37.iad> Alan Browne <bitbucket@blackhole.com> wrote:

On 2020-11-15 11:46, gtr wrote:

On 2020-11-14 14:56:33 +0000, Alan Browne said:

On 2020-11-14 01:46, gtr wrote:

On 2020-11-14 00:38:26 +0000, Alan Browne said:

On 2020-11-13 15:24, gtr wrote:

On 2020-11-13 16:36:11 +0000, Alan Browne said:

On 2020-11-12 11:06, gtr wrote:

I'm looking for an app or utility, that will allow me to do the >>>>>>>> following:

Feed it a video file, *type in a starting time code and and
ending time code*, and have it spit out the clip into separate >>>>>>>> file.  I need to feed it 30 or more such files, culling 4
portions of video from each, all of them at different times, so >>>>>>>> it has to be a realitively clean interaction like this.

Handbrake does that - perhaps not to "time code" level, but at
least to seconds or frames in whatever range you need.

I thought it did too!  But I can't seem to find it.  Can you point >>>>>> me there?

Google (whatever) "Handbrake".  Can't miss it.

Ah, what the hell: https://handbrake.fr/

I have the program, I've looked for the option. I can't see it.

Where it says "Range".  You can set it to "Chapters", "Seconds",
"Frames" and then enter the appropriate info for that option.

V 1.2.2 is what I have.
V 1.3.3 is the latest.

V 1.0.7 contains a trojan.  Do not run it if you have it.

I have 1.3.3 as well.  Why do you hang with 1.2.2?

I had no reason to upgrade it. It's no different under the hood. But
due to this discussion I have updated it to 1.3.3 and so far all I see
is a better queue display with the information on a particular clip in
the right pane whereas before you had to click-open from the queue line.

I've never been one to update s/w just because. There has to be a compelling reason. A bug. An important security fix. A desirable feature.

Quite a lot of updates in 1.3.0

<https://handbrake.fr/news.php?article=43>

Python 3 was enough of a reason for me to update as I could remove
python 2 from one system, but there are definite fixes in moving from
1.2.x to 1.3.x

For that matter on a large conversion project I wrote a program to drive HandbrakeCLI and manage the backup of the resulting files.

I used to used Handbrake CLI a lot, but I've mostly been using ffmpeg
recently since it supports the h.265 hardware encoding without too much
hoop jumping.

--
I got a question. If you guys know so much about women, how come
you're here at like the Gas 'n' Sip on a Saturday night
completely alone drinking beers with no women anywhere?
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On 2020-11-15 13:25, Lewis wrote:

In message <ybdsH.541482$HY4.453352@fx37.iad> Alan Browne <bitbucket@blackhole.com> wrote:

I had no reason to upgrade it. It's no different under the hood. But
due to this discussion I have updated it to 1.3.3 and so far all I see
is a better queue display with the information on a particular clip in
the right pane whereas before you had to click-open from the queue line.

I've never been one to update s/w just because. There has to be a
compelling reason. A bug. An important security fix. A desirable feature.

Quite a lot of updates in 1.3.0

<https://handbrake.fr/news.php?article=43>

Python 3 was enough of a reason for me to update as I could remove
python 2 from one system, but there are definite fixes in moving from
1.2.x to 1.3.x

None that have affected me in the interim.

For that matter on a large conversion project I wrote a program to drive
HandbrakeCLI and manage the backup of the resulting files.

I used to used Handbrake CLI a lot, but I've mostly been using ffmpeg recently since it supports the h.265 hardware encoding without too much
hoop jumping.

I could have gone that way too. I don't recall the precise reason why I
chose HBCLI but it did h.265 w/o any issue.

--
"...there are many humorous things in this world; among them the white
man's notion that he is less savage than the other savages."
-Samuel Clemens
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