I can create x264 mp4 files without problems. However I have a .mkv file that I need to edit. I used mkvtools to break up the mkv into its components: a 264 file and an ac3. However I can't seem to ...

[In response to reader questions and comments, this article was updated at 6:20 a.m. on Monday, May 24. See author's comments at the end of the article.—Ed] VP8 is now free, but if the quality is ...