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markkoskg15941118
markkoskg15941118
Inspiring
August 5, 2020
Answered

Very heavy Prores files. How do I reduce them?

  • August 5, 2020
  • 1 reply
  • 13872 views

I have noticed that prores files work much faster on my pc than mp4 h264. I have more than 300 videos between 3-10 seconds. I convert them to prores, but they are too heavy. When they were mp4 they weighed 5mb each. Now they weigh more than 200mb and I don't have that much space. How can I create lighter prores files with Media Encoder?

    This topic has been closed for replies.
    Correct answer Kevin-Monahan

    Hey Mark,
    You can solve this problem. Buy more drive space for your working scratch drive. Keep in mind you only need these files while you edit. Dump them after your export to regain that sweet sweet drive space.

    Personally? I transcode to ProRes LT and do not use proxies. Works fine up to 4K on underpowered computers. Place the media on a high speed drive, though.

    Thanks,
    Kevin

    1 reply

    M
    Michael Grenadier
    Legend
    August 6, 2020

    You need to understand how files are compressed and how that effects file size and playback.   You might also want to learn about working with proxies in premiere which would allow you to transcode to prores proxy for relatively smaller file sizes but when you export from premiere, you'll be referencing the mp4 files.   It's not simple but it's worth the effort.  

    markkoskg15941118
    markkoskg15941118Author
    Inspiring
    August 6, 2020

    Yes I know. But I want to do it this way because I have discovered something.
    When I drag a video clip to the timeline, I first look at the thmbnails. If the videos are mp4 (it takes a few seconds to load the thumbnails) Although the videos have a proxy.
    But if the base videos are Proress 422, thumbnails load three times as fast. That is to say, my computer does not get stuck, nor does it slow me down. I just need to lower the weight of the proress files due to lack of disk space.
    You know how to do it? When I drag an mp4 video to Media encoder and choose proress option. It does not give me the option to choose the mpbs or the weight I want the files to have.

      M
      Michael Grenadier
      Legend
      August 7, 2020

      Not to quibble, but file size = bitrate x duration.

      No other adjustments affect  file size.

       

      MtD


      of course pixel dimensions effect file size.  a 4k file is going to be bigger than a 1080 file with the same bitrate and duration.   Just check out digital rebellion's video space calculator...  https://www.digitalrebellion.com/webapps/videocalc

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