It should be SMplayer.

SMPlayer is committed to becoming a complete front-end program for MPlayer, from basic video, DVD and VCD playback functions to advanced functions, such as supporting MPlayer filters.

One of the most interesting features of SMPlayer is that it remembers your settings when playing any file. You start watching a movie and have to interrupt for a moment... Don't worry, when you open that movie again, it will resume where you left off, using the same settings: audio track, subtitles, volume...

Other interesting features:

Subtitles can be set. You can choose the font and size, and even the color of the subtitles.

Audio track switching. You can choose which audio track to listen to. Supports AVI and MKV formats, and of course DVD.

Use the mouse wheel to locate. You can use the mouse wheel to move forward and backward through the video file.

Video equalizer allows you to adjust the brightness, contrast, hue, saturation and gamma value of video images.

Various speed playback. You can play at 2x speed, 4x speed... or even slow playback.

Filter. Several filters are provided: deinterlacing, post-processing, noise reduction... and karaoke filter (removing vocals).

Audio and subtitle delay calibration. Allows you to synchronize audio and subtitles.

Enhanced options such as choosing a splitter or video & audio codec.

Playlist. Allows multiple files to be loaded and played sequentially. Supports automatic repeat and random play.

Preferences dialog box. You can use it to easily configure every option of SMPlayer.

Possibility to search automatically for subtitles in opensubtitles.org.

Localization interface: Currently, SMPlayer has been translated into more than 20 languages, including Spanish, German, French, and Italian English, Russian, Chinese, Japanese...

Cross-platform. There are binary executables for Windows and Linux platforms.

SMPlayer is released under the GPL license.