Forum Replies Created

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  • Daniel Low

    April 10, 2008 at 1:26 pm in reply to: Compressing for YouTube

    Your key frame rate is way too high, I suggest every 250 frames if you stick to transcoding at 25fps – general rule of thumb is the keyframe setting should be 10x your frame rate.

    You should deinterlace unless your source was shot progressive.

    You should perform a multi pass (slower) transcode if you want the best looking output.

    Your audio target bitrate is IMO excessive. I’d suggest 192kb/s max.

    720p usually refers to 1280x720p – an HD format – ‘p’ stands for progressive, rather than ‘i’ which is interlaced

    Lastly, compressor will do better job of this than simply going straight out of Quicktime Pro. Compressor in a dedicated transcoding application with high quality scaling and deinterlacing etc. Quicktime Pro is a ‘player’ with some basic export tools.

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  • Daniel Low

    April 10, 2008 at 9:14 am in reply to: Fast motion on You Tube

    If you’re a perfectionist, stay well clear of Youtube, they get many things badly wrong.

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  • Daniel Low

    April 9, 2008 at 12:18 pm in reply to: Anyone else notice the ProRez Gamma Shift

    Sorry, should have read the post properly.

    I don’t have an answer but it’s worth bearing in mind that the Animation codec is 8bit 4:4:4 RGB lossless (when set to ‘best’). ProRes, is as you know, is 10bit 4:2:2 YUV. As such you are bound to see a difference but not a huge shift in Gamma, I wouldn’t have thought.

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  • Daniel Low

    April 9, 2008 at 10:04 am in reply to: Fast motion on You Tube

    Youtube’s transcoding methods simply can’t handle complex video without falling apart. That said, can you post a link to your video so we can confirm that’s the issue?

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  • Daniel Low

    April 8, 2008 at 6:57 pm in reply to: Anyone else notice the ProRez Gamma Shift

    Yea – there’s been a bunch of stuff about this on the interweb for a while now.

    https://www.capria.tv/2007/06/19/prores-422-after-effects-gotcha/

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  • Daniel Low

    April 8, 2008 at 6:53 pm in reply to: Divx Encoding on a Mac

    Episode is the best transcoder on the Mac and one of the better ones out there on any platform. Indeed CBR does not mean ‘flat’ but a constant average over a set period of time.

    Divx is based on MPEG-4 advanced simple profile but is not MPEG-4 standards compliant. By all means start with an MPEG-4 template, and adjust it, accessing Divx by choosing to output to MOV with the video encoded as Quicktime (audio as MP3) and then under the video tab choose divx from the drop down of codecs.

    Xvid is free
    Divx is not

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  • Daniel Low

    April 8, 2008 at 3:09 pm in reply to: Problem compressing mixed 1080i/p FCP seq to M2v

    Maybe this will be of assistance:

    https://docs.info.apple.com/article.html?artnum=306389

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  • Daniel Low

    April 8, 2008 at 3:04 pm in reply to: 16X9 Compression

    Personally I wouldn’t want to crop it to fit, I’d want to pillarbox it (the opposite of letterbox). Compressor calls this ‘Padding’, have a look at page 273 of the compressor 3 user manual for details.

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  • Daniel Low

    April 8, 2008 at 2:59 pm in reply to: Divx Encoding on a Mac

    As the Divx CODEC is Quicktime based, any application working in Quicktime will be able to access the CODEC.
    Your best bet is to use a dedicated and professionally supported transcoding application like Episode. This sort of application will provide proper bitrate control as well as many other tools to get the best looking output at the desired bitrate.
    You can download a trail of Episode from http://www.flip4mac.com.

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  • Daniel Low

    April 7, 2008 at 2:34 pm in reply to: Compressing for YouTube

    Without hacks, most youtube content looks terrible.

    Check this page to see if you’re missing anything

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