To convert FLV to JPG, you can use FLV to JPG Batch Converter. Because it enables users to convert several FLV video files to JPG images at one time. It also allows capturing images with different time intervals. You can use FLV to JPG Batch Converter to set the resolution and quality for the output image files.

The tool application is free for trial and you can download it via clicking here. If you need the full function version, please buy a registration key by clicking here. It is for the single-user personal license. There are also three other kinds of licenses and please visit the website the website to obtain the one you need.

The main interface in Figure 1 can give you the acquaintance to the application. There is a list in the middle of the interface, which is used to list all the video files to be converted. You can add FLV files by clicking "Add Image File(s)" button or dragging the files into the list from your computer. Right clicking the mouse in the list and choosing "Add files" option is another way to add video file. You can also remove image file one by one by clicking on "Remove" button or remove all the files by clicking "Remove All" button. The button "Preview Video" below is used to preview each video file.

Then please set parameters for the output files in "Option" dialog box by clicking on "Options" button. Please see Figure 2. In "Start (Sec)" and "End (Sec)" spin boxes, you can set the start and end time of FLV file in the conversion of FLV to JPG. If you want to change the resolution for the output images, you can set the width and height in "Size (1 to 6000)" spin box. The image quality can also be controlled in "Quality: (0.01 to 255)" spin box. There are several selectable output formats in "File Format" combo box. Of course, here you should choose "JPEG Image (*.jpeg)". To get different numbers of output images, you can set the capture interval in "Interval (Sec)" spin box. Then please click "OK" to continue.

After clicking "Convert" button in Figure 1, you will see "Browse for Folder" dialog box. Please see Figure 3, in which you can specify the directory for the target files. You can choose an existed folder in tree control or create a new one by clicking "Make New Folder" button. You can also input the directory of some folder in "Folder" edit box to save the output files in that directory. Then click "OK" button to run the batch conversion.

Please see the conversion result in Figure 4.