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[IRIE Shinsuke <719946@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

The image sequence detection is nice feature but doesn't work in the
following cases:

1. File names have no base name:

 e.g. 000.png, 001.png, 002.png, 003.png, 004.png, ...

 Blender generates image sequence like this.

2. File names include multibyte characters:

 e.g. 画像000.png, 画像001.png, 画像002.png, 画像003.png, ...

 Multibyte support is essential for asian users.

3. Sequence has discrete numbers:

 e.g. prof000.png, prof005.png, prof010.png, prof015.png, ...

 I often process the results of numerical simulations as such discrete
numbered images.

4. Sequence starts with (power of ten)-1 and drop the first image:

 e.g. img009.png, img010.png, img011.png, ...  (Drop img009.png)

5. Sequence ends with power of ten and drop the last image:

 e.g. ..., img098.png, img099.png, img100.png  (Drop img100.png)


I attached a patch for this issue. Please check it.

** Affects: openshot
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/719946

Title:
  Image sequence detection fails in many cases

Status in OpenShot Video Editor:
  New

Bug description:
  The image sequence detection is nice feature but doesn't work in the
  following cases:

  1. File names have no base name:

   e.g. 000.png, 001.png, 002.png, 003.png, 004.png, ...

   Blender generates image sequence like this.

  2. File names include multibyte characters:

   e.g. 画像000.png, 画像001.png, 画像002.png, 画像003.png, ...

   Multibyte support is essential for asian users.

  3. Sequence has discrete numbers:

   e.g. prof000.png, prof005.png, prof010.png, prof015.png, ...

   I often process the results of numerical simulations as such discrete
  numbered images.

  4. Sequence starts with (power of ten)-1 and drop the first image:

   e.g. img009.png, img010.png, img011.png, ...  (Drop img009.png)

  5. Sequence ends with power of ten and drop the last image:

   e.g. ..., img098.png, img099.png, img100.png  (Drop img100.png)

  
  I attached a patch for this issue. Please check it.