don't process fragments if we don't have a moov
don't process fragments if we don't have a moov

b123400/mp4box.js,sjames1958gm/mp4box.js,gpac/mp4box.js,hanzeil/mp4box.js,gpac/mp4box.js,hanzeil/mp4box.js,b123400/mp4box.js,sjames1958gm/mp4box.js