Sometimes, a file converted using a batch file may not save in the correct format because the converter tool may not be correctly reading the output settings, or the selected format may not be supported by all files. This can also occur due to software bugs or missing support for codecs. Rather than run the risk of these problems as suggested elsewhere, you may explore the option of Softaken Audio Video Converter. The software is dependable, and it will allow you to pick from a variety of different audio and video formats, including MP3, MP4, FLAC, AVI, and others. This product also makes certain that every file is saved according to the specific format you select and guarantees that these errors do not occur for each file. Users can also do batch conversions so that they can convert many files for processing at the same time without losing quality. A free demo version is also available for Windows, and it should not be difficult to figure out what options are available.