# Getting Error: The Encoder Timebase is not set when trying to render finished Video sequence

I cannot find any other posts to do with this and I don't to completely mess up my Blender while messing with settings I do not understand. I finished putting a video together in VSE and tried to render it and I got this error: The encoder timebase is not set .

How do I fix this? Also I am happy with a workaround such as copying my VSE strips to a second Blender window but I don't know how (Yet again) :) . Thanks

Edit: It seems to be something to do with FFmpeg because when I switch to an image format it renders fine. I will try removing the audio codec (mp3).

• Hmm, thats weird. What are your output settings for ffmpeg? Did you try another Codec? I know that Blender's .mkv files seem broken May 14 '18 at 4:16
• @3pointedit can you write a bug report about this, including how to reproduce this brokenness of .mkv? developer.blender.org Jun 17 '18 at 8:20
• @experimental-rocket can you install ffmpeg and paste the output of ffprobe file-that-causes-issues? Jun 17 '18 at 8:22
• @dr.Sybren I have checked a recent build of 2.79 on the 7th July and can no longer find an issue with .mkv files. Sorry for noise Jul 6 '18 at 6:17