* [PATCH 3/3] splitfx: support tshift directive
2024-04-26 7:04 7% [PATCH 0/3] a small pile of miscellany Eric Wong
@ 2024-04-26 7:04 5% ` Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2024-04-26 7:04 UTC (permalink / raw)
To: dtas-all
This directive is useful for cutting sections of audio out in
addition to making it easier to share track offsets between
different recordings of the same source.
---
Documentation/dtas-splitfx.pod | 14 ++++++++++++++
lib/dtas/splitfx.rb | 20 +++++++++++++++++---
2 files changed, 31 insertions(+), 3 deletions(-)
diff --git a/Documentation/dtas-splitfx.pod b/Documentation/dtas-splitfx.pod
index 6f8d9ed..88179d7 100644
--- a/Documentation/dtas-splitfx.pod
+++ b/Documentation/dtas-splitfx.pod
@@ -173,6 +173,20 @@ any tracks written to the filesystem, including those using the L</--filter>
switch. These environment variables are intended to affect the specified
L</command> or default L<sox(1)> invocation.
+=item tshift TIME
+
+Increment subsequent time stamps for L</t>, L</skip>, and L</stop>
+directives by the specified TIME offset. TIME can be prefixed by
+C<+=> or C<-=> to adjust the existing C<tshift> value. Negative
+values can be specified by prefixing with C<-> for a backwards
+time shift.
+
+This directive is useful for working with multiple recordings of the
+same source and cutting a section from the middle of a recording after
+initial tracking is done.
+
+Default: 0
+
=item skip TIME - skip a segment starting at TIME
"skip" segments are
diff --git a/lib/dtas/splitfx.rb b/lib/dtas/splitfx.rb
index 1150ee0..b94f54b 100644
--- a/lib/dtas/splitfx.rb
+++ b/lib/dtas/splitfx.rb
@@ -66,6 +66,7 @@ def commit(advance_track_samples)
# $CHANNELS (input)
# $BITS_PER_SAMPLE (input)
def initialize
+ @tshift = 0
@env = {}
@comments = {}
@track_start = 1
@@ -290,7 +291,7 @@ def parse_track(argv)
start_time = argv.shift
title = argv.shift
t = T.new
- t.tbeg = @t2s.call(start_time)
+ t.tbeg = @t2s.call(start_time) + @tshift
t.comments = @comments.dup
title.valid_encoding? or warn "#{title.inspect} encoding invalid"
t.comments["TITLE"] = title
@@ -311,11 +312,24 @@ def parse_track(argv)
prev = @tracks.last and prev.commit(t.tbeg)
@tracks << t
+ when 'tshift'
+ tshift = argv.shift
+ argv.empty? or raise ArgumentError, 'tshift does not take extra args'
+ if tshift.sub!(/\A-=/, '')
+ @tshift = @tshift - @t2s.call(tshift)
+ elsif tshift.sub!(/\A\+=/, '')
+ @tshift = @tshift + @t2s.call(tshift)
+ elsif tshift.sub!(/\A-/, '')
+ @tshift = -@t2s.call(tshift)
+ else
+ tshift.sub!(/\A\+/, '')
+ @tshift = @t2s.call(tshift)
+ end
when "skip"
stop_time = argv.shift
argv.empty? or raise ArgumentError, "skip does not take extra args"
s = Skip.new
- s.tbeg = @t2s.call(stop_time)
+ s.tbeg = @t2s.call(stop_time) + @tshift
# s.comments = {}
# s.env = {}
prev = @tracks.last or raise ArgumentError, "no tracks to skip"
@@ -324,7 +338,7 @@ def parse_track(argv)
when "stop"
stop_time = argv.shift
argv.empty? or raise ArgumentError, "stop does not take extra args"
- samples = @t2s.call(stop_time)
+ samples = @t2s.call(stop_time) + @tshift
prev = @tracks.last and prev.commit(samples)
else
raise ArgumentError, "unknown command: #{xs(cmd)}"
^ permalink raw reply related [relevance 5%]
* [PATCH 0/3] a small pile of miscellany
@ 2024-04-26 7:04 7% Eric Wong
2024-04-26 7:04 5% ` [PATCH 3/3] splitfx: support tshift directive Eric Wong
0 siblings, 1 reply; 2+ results
From: Eric Wong @ 2024-04-26 7:04 UTC (permalink / raw)
To: dtas-all
I've been using 1 + 2 for a while, but I still intend to figure
out what soxi is hanging on sometimes...
`tshift' for splitfx has been in the back of my mind for years,
but I only just got around to it.
Eric Wong (3):
source/sox: use Process::Status#inspect for diagnostics
use CPU rlimit to limit soxi||ffprobe run time
splitfx: support tshift directive
Documentation/dtas-splitfx.pod | 14 ++++++++++++++
bin/dtas-readahead | 2 +-
lib/dtas/source/av_ff_common.rb | 2 +-
lib/dtas/source/sox.rb | 5 +++--
lib/dtas/splitfx.rb | 20 +++++++++++++++++---
5 files changed, 36 insertions(+), 7 deletions(-)
^ permalink raw reply [relevance 7%]
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