Episode 052 – Re-Encode

February 12th, 2008 by rfquerin

Thanks to several of you great readers and viewers out there for letting me know that the Episode 052 avi file stuttered and stammered when played in VLC.

Tonight I re-did my processing. This time I converted the original ogg files to h264 avi’s without b-frames and did all my joining and editing that way, only converting to a b-frame version at the end. This accomplished two key things:

1. The filesize of the final avi file dropped from around 78MB to about 35MB. Nice!

2. The avi file seems to play smoothly now in VLC. Although I did notice a slight jumpiness during the initial 15 second screencasters splash at the beginning, the rest of it seemed to play much better in VLC. I’ve also got to get a better copy of that intro because I still think the sound is clipped heavily in spots.

So I can definitively say that the order in which you do the conversions and processing definitely makes a huge difference.

Please take another download of the newly uploaded avi file for Episode 052, try it out in VLC and report back in the comments here. Hopefully this fixes the problem.

And many thanks to our wonderful viewers. We’ve been getting lots of comments lately and we love the discussion. And as you can see, you can also help us improve things. Now if only you could get heathenx to stop blaming me for everything. 😉

ps. You may notice my voice level to be a little low. I don’t think I boosted it enough in Audacity to bring it in line with the intro volume this time out. But hey, maybe I’ll get the next one completely right. 😉

5 Responses to “Episode 052 – Re-Encode”

  1. Serge Gielkens Says:

    Something I should keep in mind. I would not have expected possible issues with the order of encoding files with and without b-frames. I am also stunned by the huge drop in file size; more than 50%!

    Did you wrap the whole process up in Python scripts now?

  2. heathenx Says:

    Good work, Richard.

    You’re right. I blame you too much. This time it’s Serge’s fault. I blame him.

  3. Richard Querin Says:

    Man I’m frustrated. As soon as I do something good (reduce the filesize and eliminate the skipping) you stop blaming me and blame Serge instead. What does a guy have to do around here to catch a break? Nevermind. Please don’t answer that! 😉

    @Serge – I haven’t wrapped it all into a set of python scripts yet, but I’m determined to do that while I still remember what I did (and while it’s still in my terminal history file!) 😉 Right now I’m copying terminal commands from my mencoder script library (which is the fancy name for a text file). 😉

  4. Don Waters Says:

    Works great with VLC now.
    P.S. Don’t worry Richard, we’ll keep you on your toes. ;-}

  5. addictinng games 10 Says:

    Attractive element of content. I just stumbled upon your web site and in accession capital to claim that I acquire actually loved account your weblog posts.
    Anyway I will be subscribing for your feeds and
    even I success you access constantly quickly.

    my homepage :: addictinng games 10