====== Bug FS#76: Failure on last capture ======

<del>[[bts>76|#76 - Failure while capturing last frame]]</del>

E.T.A.: **Fixed in SVN, will be in 1.11. Should fix this automatically and include a fallback workaround much simpler than the current one**.

This is one of the most annoying and well known bugs in the script.

Reported by various people and noticied by myself too.

  * Seen specially with WMVs but also seen on MOV (SVQ3 at least) and AVIs (reportedly)
  * Theory #1: Length is detected incorrectly. [[#Length_detection|Confirmed]].
  * Theory #2: Appointed by //Dougn Redhammer// \\ WMVs authored in macs are more prone to this error. His samples confirmed to have been edited in Macs seemed to verify this.

===== Length detection =====

Using the ''-t'' or ''-E'' and ''-O MIN_LENGTH_FOR_END_OFFSET'' hack works so the reported length is definitely the problem.
\\
This is a less than desirable solution though.

==== OS/player versions differences ====

Upon further investigation I found very different results with the same file, in at least once case, when probed on different OSes.

File: [[vcs:docs:devel:testfiles#Coral_Reef_Adventure_1080|Coral_Reef_Adventure_1080.wmv]]

On Debian Sid, Linux amd64 (@ 2010-02-25):
  * FFmpeg (two versions):  01:45.42 
  * Mplayer (SVN-r30534):     01:45.43
  * δ: 0.01s

On FreeBSD 8.0-RELEASE, i386:
  * FFmpeg (0.5):  01:41.29
  * Mplayer (1.0rc2-4.2.1): 01:49.00
  * δ: 7.71s (**!**)

  * FFmpeg Linux vs FFmpeg FreeBSD δ: 4.13s  (**??**)
  * Mplayer Linux vs Mplayer FreeBSD δ: 3.57s (**??**)

By trial and error, I was able to capture up to ''1m44s.48''

Version information:
  * FFmpeg Linux #1 ((Debian Sid binary, deb version 5:0.5+svn20100208-0.1)):<code>$ ffmpeg -version
FFmpeg SVN-r21686
libavutil     50. 9. 0 / 50. 9. 0
libavcodec    52.52. 0 / 52.52. 0
libavformat   52.51. 0 / 52.51. 0
libavdevice   52. 2. 0 / 52. 2. 0
libavfilter    1.17. 0 /  1.17. 0
libswscale     0.10. 0 /  0.10. 0
libpostproc   51. 2. 0 / 51. 2. 0</code>
  * FFmpeg Linux #2 ((Debian Etch source, deb version 0.cvs20060823)):<code>$ ffmpeg -version
ffmpeg      SVN-rUNKNOWN
libavutil   3211264
libavcodec  3345152
libavformat 3278080</code>
  * Mplayer Linux ((Debian Sid binary, deb version 1:1.0.rc2svn20100211-0.0)):<code>$ mplayer 2>&1 | head -n1
MPlayer SVN-r30534 (C) 2000-2009 MPlayer Team</code>
  * FFmpeg FreeBSD ((8.0-CURRENT Package, pkg version 0.5,1)):<code>$ ffmpeg -version
FFmpeg 0.5
libavutil     49.15. 0 / 49.15. 0
libavcodec    52.20. 0 / 52.20. 0
libavformat   52.31. 0 / 52.31. 0
libavdevice   52. 1. 0 / 52. 1. 0
libavfilter    0. 4. 0 /  0. 4. 0
libswscale     0. 7. 1 /  0. 7. 1
libpostproc   51. 2. 0 / 51. 2. 0</code>
  * Mplayer FreeBSD ((8.0-CURRENT Package, pkg version 0.99.11_14)):<code>$ mplayer 2>&1 | head -n1
MPlayer 1.0rc2-4.2.1 (C) 2000-2007 MPlayer Team</code>