Discussion in 'Digital Video' started by Topher15, Jan 27, 2009.

  1. Topher15 macrumors 6502a


    Oct 22, 2007
    Just a couple of question before I start the process of converting AVIs to MP4s:

    1. Is there a difference between using the iTunes tab and the MP4 tab?

    2. I'm going to select "copy original audio track (passthrough)" which I suspect would save time, but what would happen if I also choose "copy original video track (passthrough)." Would it just convert the AVI to MP4 and not re encode the video? Since the video is already compressed I suspect this would be the best option, assuming I've understood it right.

    3. Would changing the bitrate to a higher level than the original file increase the quality, or just unnecessarily increase the file size.

    4. Is it wise to covert a batch of files rather than doing them one at a time. If the original source video is different for each file then wouldn't they all be converted with the same settings (which may not always be appropriate for each file.)

    5. I would like to keep the file as close to the original file size (or lower without loosing quality), but not higher if possible. What are the best settings to achieve this?

  2. -DH macrumors 65816

    Nov 28, 2006
    Nashville Tennessee
    AVI is a container. The video/audio within could be from any number of codecs and settings. Converting to any other codec than the original IS re-encoding / re-compressing and will result in some quality loss.

    Recompressing a video file will never increase quality. It will never be higher quality than the source, regardless of the file size.

    If it isn't appropriate for each file, then it wouldn't be a wise thing to do.

    It all depends on what you intend to do with the converted files. Are they for editing? Or do you just want to convert them for playback compatibility ... or just to save space? Which method and codec is best all depends on what you're going to do with the files. Just remember, quality is always the cost of recompressing.

  3. Roy Hobbs macrumors 68000

    Roy Hobbs

    Apr 29, 2005
    Regarding #4...... you can add a batch of files to the queue all with different settings.
  4. JohnEnglish macrumors newbie

    Jan 29, 2009
    where is the hub

    So far as I found, Visual Hub can't be downloaded as the file isn't linked any longer.
  5. ziggyonice macrumors 68020


    Mar 12, 2006
    Rural America
    Yeah, the author is no longer working on the app, removing it from download. You'll have to use other means to find a copy... hmm...

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