What is the difference between DirectVobSub and the internal subtitle filter of Media Player Classic?
They are largely based on the same code, so they have similar abilities. The main difference between the two is how the subtitles are merged with the video.DirectVobSub merges the subtitle image with a video frame before that video frame gets send to the video renderer. The advantage of this method is that it works with all video renderers.The internal subtitle filter of MPC sends the subtitle image to the video renderer separately from the video. The video renderer is responsible for merging them together. The advantage of this method is that it is compatible with DXVA video decoders. That are video decoders that use your graphics card to assist in the decoding process. Such decoders need a direct connection to the video renderer, meaning that intermediate filters such as DirectVobSub can not be used. A disadvantage of the internal subtitle filter of MPC is that it only works with certain video renderers.When the internal subtitle filter of MPC is enabled it will automatically prevent
