09-13-2018
There's no particular reason -vf shouldn't work in a while loop. It's just very tricky to get all the quoting and escaping right. Shove printf "\t%s\n" in front of ffmpeg to see what its really doing - it will print each separate argument on its own line. You'll be able to tell if your quotes broke somewhere.
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LEARN ABOUT DEBIAN
mail::mboxparser::mail::body
MboxParser::Mail::Body(3pm) User Contributed Perl Documentation MboxParser::Mail::Body(3pm)
NAME
Mail::MboxParser::Mail::Body - rudimentary mail-body object
SYNOPSIS
use Mail::MboxParser;
[...]
# $msg is a Mail::MboxParser::Mail
my $body = $msg->body(0);
# or preferably
my $body = $msg->body($msg->find_body);
for my $line ($body->signature) { print $line, "
" }
for my $url ($body->extract_urls(unique => 1)) {
print $url->{url}, "
";
print $url->{context}, "
";
}
DESCRIPTION
This class represents the body of an email-message. Since emails can have multiple MIME-parts and each of these parts has a body it is not
always easy to say which part actually holds the text of the message (if there is any at all). Mail::MboxParser::Mail::find_body will help
and suggest a part.
METHODS
as_string ([strip_sig => 1])
Returns the textual representation of the body as one string. Decoding takes place when the mailbox has been opened using the decode =>
'BODY' | 'ALL' option.
If 'strip_sig' is set to a true value, the signature is stripped from the string.
as_lines ([strip_sig => 1])
Sames as as_string() just that you get an array of lines with newlines attached to each line.
NOTE: When the body is actually some encoded binary data (most commonly such a body is base64-encoded), you can still use this method.
Then you wont really get proper lines. Instead you get chunks of binary data that you should concatenate as in
my $binary = join "", $body->as_lines;
If 'strip_sig' is set to a true value, the signature is stripped from the string.
signature
Returns the signature of a message as an array of lines. Trailing newlines are already removed.
$body->error returns a string if no signature has been found.
extract_urls
extract_urls (unique => 1)
Returns an array of hash-refs. Each hash-ref has two fields: 'url' and 'context' where context is the line in which the 'url' appeared.
When calling it like $mail->extract_urls(unique => 1), duplicate URLs will be filtered out regardless of the 'context'. That's useful
if you just want a list of all URLs that can be found in your mails.
$body->error() will return a string if no URLs could be found within the body.
quotes
Returns a hash-ref of array-refs where the hash-keys are the several levels of quotation. Each array-element contains the paragraphs of
this quotation-level as one string. Example:
my $quotes = $msg->body($msg->find_body)->quotes;
print $quotes->{1}->[0], "
";
print $quotes->{0}->[0], "
";
This should print the first paragraph of the mail-body that has been quoted once and below that the paragraph that supposedly is the
reply to this paragraph. Perhaps thus:
> I had been trying to work with the CGI module
> but I didn't yet fully understand it.
Ah, it is tricky. Have you read the CGI-FAQ that
comes with the module?
Mark that empty lines will not be ignored and are part of the lines contained in the array of $quotes->{0}.
So below is a little code-snippet that should, in most cases, restore the first 5 paragraphs (containing quote-level 0 and 1) of an
email:
for (0 .. 4) {
print $quotes->{0}->[$_];
print $quotes->{1}->[$_];
}
Since quotes() considers an empty line between two quotes paragraphs as a paragraph in $quotes->{0}, the paragraphs with one quote and
those with zero are balanced. That means:
scalar @{$quotes->{0}} - DIFF == scalar @{$quotes->{1}} where DIFF is element of {-1, 0, 1}.
Unfortunately, quotes() can up to now only deal with '>' as quotation-marks.
VERSION
This is version 0.55.
AUTHOR AND COPYRIGHT
Tassilo von Parseval <tassilo.von.parseval@rwth-aachen.de>
Copyright (c) 2001-2005 Tassilo von Parseval. This program is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
SEE ALSO
perl v5.12.3 2005-12-08 MboxParser::Mail::Body(3pm)