Re: [FFmpeg-user] Extract chapter names to a text file?

[Laine]

On Dec 3, 2022, at 3:26 PM, MyCraigs List via ffmpeg-user 
 wrote:
> 
> What is the command to extract all of the chapter  names from a video and 
> then have them saved in a text file?  I only want each  chapter name, one 
> name per line, and nothing else.
> Thanks,
> Craig
> 

Hi Craig,

Because you didn’t get a response that I’m aware of, I’m sending one.

This might include the information you want in its output file, but you may 
need to otherwise process the output to format it as you described.
(Use “-y” if you don’t mind overwriting “chapters.txt”.)

ffmpeg -y -loglevel error -i input -f ffmetadata chapters.txt

L. Lee
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

[FFmpeg-user] Changing scan type (progressive<->interlaced) without reencoding.

[Steinar Apalnes]

Hi,

As the title says, is this at all possible? My concern is mostly with mpeg2
and h264 that have content of one type but encoded/marked as another. Most
notably content that has progressive video but stored interlaced. So I'm
probably talking about a bit stream filter here because just setting the
"field_order", "top" etc. flags when rewrapping does nothing.But I have not
found anything in the official docs that suggest this is currently possible
so it would be nice if some of you developers could shed some light on this.

Thanks,
Steinar Apalnes
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Changing scan type (progressive<->interlaced) without reencoding.

[Bouke (Edit 'B)]

It’s no problem at all.
Btw, it’s very common to store progressive as interlaced, as broadcast still 
requires interlaced material, no matter how it is shot.

From memory, just do a -c copy and you’ll end up with the source in a 
progressive container.

Bouke


> On 05 Dec 2022, at 11:56, Steinar Apalnes  wrote:
> 
> Hi,
> 
> As the title says, is this at all possible? My concern is mostly with mpeg2
> and h264 that have content of one type but encoded/marked as another. Most
> notably content that has progressive video but stored interlaced. So I'm
> probably talking about a bit stream filter here because just setting the
> "field_order", "top" etc. flags when rewrapping does nothing.But I have not
> found anything in the official docs that suggest this is currently possible
> so it would be nice if some of you developers could shed some light on this.
> 
> Thanks,
> Steinar Apalnes
> ___
> ffmpeg-user mailing list
> ffmpeg-user@ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
> 
> To unsubscribe, visit link above, or email
> ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Extract chapter names to a text file?

[Laine]

> 
> This might include the information you want in its output file, but you may 
> need to otherwise process the output to format it as you described.
> (Use “-y” if you don’t mind overwriting “chapters.txt”.)
> 
> ffmpeg -y -loglevel error -i input -f ffmetadata chapters.txt
> 
> L. Lee


If you are able to generate “chapters.txt” but observe an overabundance of 
information in that file, you might try the options that I used to get just the 
video title and a list of the chapters.

Download match.pl (it appears in text on the page, just copy it using your 
browser) from
http://noahdavids.org/self_published/match.html 

and make it executable on your system.

Then run this command:
perl match.pl -match title -file chapters.txt | perl -pe 's/title=//s’

I’m sure there are perl savvy subscribers to this list who know how to yield 
the same results while bypassing match.pl, but match.pl seemed useful to me.

L. Lee
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Extract chapter names to a text file?

[Carl Zwanzig]

On 12/5/2022 1:36 PM, Laine wrote:

If you are able to generate “chapters.txt” but observe an overabundance
of information in that file, you might try the options that I used to get
just the video title and a list of the chapters.


'grep' does wonders for pulling info out of files
  grep '^title=' chapters.txt

(return all lines that start with "title=")
all *nix and the mac should have grep, windoze doesn't unless you installed 
it yourself


Or use mediainfo, which allows you to easily specify what data you want and 
how it's formatted.


z!
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Extract chapter names to a text file?

[Laine]

On Dec 5, 2022, at 6:10 PM, Carl Zwanzig  wrote:
> 
> On 12/5/2022 1:36 PM, Laine wrote:
>> If you are able to generate “chapters.txt” but observe an overabundance
>> of information in that file, you might try the options that I used to get
>> just the video title and a list of the chapters.
> 
> 'grep' does wonders for pulling info out of files
>  grep '^title=' chapters.txt
> 
> (return all lines that start with "title=")
> all *nix and the mac should have grep, windoze doesn't unless you installed 
> it yourself
> 
> Or use mediainfo, which allows you to easily specify what data you want and 
> how it's formatted.
> 
> z!
> 

Thanks!
 
And the following appears to remove “title=“ from lines generated by "grep 
'^title=‘ chapters.txt” alone.

grep '^title=' chapters.txt | perl -pe 's/title=//s’

L. Lee
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Extract chapter names to a text file?

[Carl Zwanzig]

On 12/5/2022 4:20 PM, Laine wrote:
  
And the following appears to remove “title=“ from lines generated by "grep '^title=‘ chapters.txt” alone.


grep '^title=' chapters.txt | perl -pe 's/title=//s’


I'm not clear you you'd use perl at all when sed is more common for this 
sort of thing (sed 's/title=//’), but whatever works for you.


z!
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Extract chapter names to a text file?

[Dan Harkless]

On 12/5/2022 4:30 PM, Carl Zwanzig wrote:

On 12/5/2022 4:20 PM, Laine wrote:
>   
> And the following appears to remove “title=“ from lines generated by "grep '^title=‘ chapters.txt” alone.
> 
> grep '^title=' chapters.txt | perl -pe 's/title=//s’


I'm not clear you you'd use perl at all when sed is more common for this
sort of thing (sed 's/title=//’), but whatever works for you.


If it were me, I'd also add a '^' to anchor the regular expression 
(regexp) to the beginning of the line, as in 's/^title=//', just on the 
off chance the string "title=" appears in a chapter name. That'll work 
in sed or perl.


And in the perl regexp, the 's' at the end isn't needed there (only 
changes how the '.' character is processed).  And if you copy and paste 
from the above, note that those curly quotes should be straight quotes.  
Putting that all together:


    grep '^title=' chapters.txt | perl -pe 's/^title=//'

or:

    grep '^title=' chapters.txt | sed 's/^title=//'

--
Dan Harkless
http://harkless.org/dan/

___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".

Re: [FFmpeg-user] Extract chapter names to a text file?

[Michael Koch]

Am 06.12.2022 um 01:10 schrieb Carl Zwanzig:

On 12/5/2022 1:36 PM, Laine wrote:

If you are able to generate “chapters.txt” but observe an overabundance
of information in that file, you might try the options that I used to 
get

just the video title and a list of the chapters.


'grep' does wonders for pulling info out of files
  grep '^title=' chapters.txt

(return all lines that start with "title=")
all *nix and the mac should have grep, windoze doesn't unless you 
installed it yourself


In Windows you can pipe the console output to "findstr". In my book is 
an example in chapter 8:

http://www.astro-electronic.de/FFmpeg_Book.pdf

Michael
___
ffmpeg-user mailing list
ffmpeg-user@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".