MPEG to AVI

Discussion in 'Other video questions' started by Twista, Oct 19, 2003.

  1. Twista

    Twista Member

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    I've been searching the forums and have been curious about this. I seem to see many posts about converting AVIs to vaious MPEG formats, but I haven't come across any about converting MPEG into AVI format. Is there some king of converter out there? This may seem like a silly question, but I'm curious and it could also have some useful applications.
     
  2. vurbal

    vurbal Administrator Staff Member

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    I capture video with a hardware MPEG2 capture card, so I can see at least one reason to do this. I used to use VirtualDubMod to edit, filter, and convert, and then save as an AVI file, but I've recently been learning how to use DVD2AVI and AviSynth to frameserve MPEG2 as AVI. Depending on what you are doing with the AVI file, this is often the best way to go since it doesn't require a lot of additional disk space, takes only a few minutes, and preserves the original file.
     
  3. Praetor

    Praetor Moderator Staff Member

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    Not much point converting from MPEG to AVI because MPEG is such low quality. In that light almost any app can do it. I.e., TMPGEnc File --> Output as --> AVI or VirtualDub --> DirectStream Copy to AVI
     
  4. Twista

    Twista Member

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    Hey thanks for replying guys. Yeah, it doesn't really have very good reasons to convert, but i just wanted to know because i want to turn some of these fighting game combo videos to avis so that my reality media player for my PS2 can play them. I also wanted to convert some of these short MPEGs that I captured on my camera. But thanks peeps.
     
  5. vurbal

    vurbal Administrator Staff Member

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    Praetor, MPEG is not automatically low quality any more than AVI is automatically high quality. My MPEG2 capture card encodes at 720x480/6000-8000 kbps(VBR) and gives me excellent quality captures from my satellite system (identical to original). Also since it is a hardware encoder the only time I get dropped frames is if I have a lot of other disk activity while capturing. Converting to AVI (or frameserving as an AVI) allows me to use CCE to compress them more efficiently, so for me there is a use. Also since DVD video is MPEG2 I don't know why you would make that assumption (unless you're specifically talking about MPEG1 in which case I agree completely).
     
    Last edited: Oct 19, 2003
  6. Praetor

    Praetor Moderator Staff Member

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    SVCDs are MPEG2. Watch a SVCD on a computer. Then watch a AVI on a computer. I rest my case.
     
  7. vurbal

    vurbal Administrator Staff Member

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    DVDs are also MPEG2. Are you saying those are low quality?

    My point is that quality isn't determined just by the file type. I've seen lots of low quality AVIs and lots of high quality MPEG2s.
     
    Last edited: Oct 22, 2003
  8. Praetor

    Praetor Moderator Staff Member

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    Low quality AVIs are done by people who dont know what they are doing. High quality MPEG2s (which is not what you originally referenced to... you said MPEG) are good when viewed on a TV. This does not apply to DVDs of course.

    Watch a movie on a sharp screen.... no no not a TV and you will see.

    As for DVDs.... ewck... I wont even go there.
     
  9. vurbal

    vurbal Administrator Staff Member

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    Ok, obviously we are talking past each other here. I don't think we're really disagreeing, we're just not reading the same words the same way. Just to be clear here is what I mean:

    MPEG - A container format for muxing an MPEG-1 or MPEG-2 video stream and various types of audio streams

    AVI - A container format for muxing various types of video and audio streams.

    That's why I said:
    On the subject of AVI:
    That depends on the compression codec being used. If you are referring specifically to DiVX or XViD then I agree. I have a 2 CD DiVX copy of The Fellowship Of The Ring that's almost indistinguishable from the DVD.

    No argument there. At home the only high resolution screens I have are my PC monitors, but I watch most of my movies at a friend's house and he has a 35" HDTV monitor and a brand new 65" progressive scan HDTV monitor. You notice any imperfection and low resolution sources look like crap.
     
  10. Praetor

    Praetor Moderator Staff Member

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    Hehe so i guess we agreed afterall.

    There are other codecs??!! :p
     
  11. vurbal

    vurbal Administrator Staff Member

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    That's the rumor. ;)
     

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