aboutsummaryrefslogtreecommitdiffstats
path: root/doc/ffmpeg-formats.texi
diff options
context:
space:
mode:
authorStefano Sabatini <stefasab@gmail.com>2013-03-18 23:55:19 +0100
committerStefano Sabatini <stefasab@gmail.com>2013-03-19 17:31:16 +0100
commit2bac6b6f5ee846348262fe3c9b58334e6e063740 (patch)
tree560608ff1a4c69d97e814deb111a249d6fbf646f /doc/ffmpeg-formats.texi
parent608bccf4705484a22cee64e4d6f362be1f6294b7 (diff)
downloadffmpeg-2bac6b6f5ee846348262fe3c9b58334e6e063740.tar.gz
doc/ffmpeg-formats: reword and extend documentation for avoid_negative_ts option
Hopefully increase readability.
Diffstat (limited to 'doc/ffmpeg-formats.texi')
-rw-r--r--doc/ffmpeg-formats.texi18
1 files changed, 12 insertions, 6 deletions
diff --git a/doc/ffmpeg-formats.texi b/doc/ffmpeg-formats.texi
index 0e972a8bd7..26596278cd 100644
--- a/doc/ffmpeg-formats.texi
+++ b/doc/ffmpeg-formats.texi
@@ -140,12 +140,18 @@ Consider things that a sane encoder should not do as an error.
Use wallclock as timestamps.
@item avoid_negative_ts @var{integer} (@emph{output})
-Shift timestamps to make them positive. 1 enables, 0 disables, default
-of -1 enables when required by target format.
-When timestamps are shifted, all timestamps of a output file are shifted
-together by the same amount. AV sync, subtitle sync and relative timestamp
-differences are preserved compared to how they would have been without
-shifting.
+Shift timestamps to make them positive. A value of 1 enables shifting,
+a value of 0 disables it, the default value of -1 enables shifting
+when required by the target format.
+
+When shifting is enabled, all output timestamps are shifted by the
+same amount. Audio, video, and subtitles desynching and relative
+timestamp differences are preserved compared to how they would have
+been without shifting.
+
+Also note that this affects only leading negative timestamps, and not
+non-monotonic negative timestamps.
+
When avoid_negative_ts is used together with copyts, vsync or async then
avoid_negative_ts is applied last. This is neccessary so that containers
which do not support negative timestamps wont get any and can be used