<div dir="ltr">I want to play from start to finish. <div><br></div><div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">I have in my Final Cut Pro the choice of producing a file with the following codecs</span></div>
<div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)"><br></span></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">Quicktime movie Format Size 1980 X 1080</span></div>
<div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">MPEG4 Format Size 1980 X 1080</span></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">H.264 for apple devices Format size 1280 X 720 (.m4v)</span></div>
<div><br></div><div>What codec works best with format size 1920 X1080? One of these or is there another one more suitable.<div><br></div></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)"><span lang="ES-MX" style="color:rgb(34,34,34);font-size:8pt"> </span><span lang="EN-US" style="font-size:8pt">[</span><span lang="ES-MX" style="color:rgb(34,34,34);font-size:8pt">pix_film</span><span lang="EN-US" style="font-size:8pt">] was able to open the .m4v (</span>H.264 for apple devices Format size 1280 X 720) but when the video plays it stutters.<br>
</span></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)"><br></span></div><div><font color="#1a1a1a" face="Arial"><span style="font-size:11px">What causes this? The codec or </span></font><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">[</span><span lang="ES-MX" style="font-size:8pt;font-family:Arial">pix_film</span><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">] or my cpu's capacity? </span></div>
<div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)"><br></span></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">I'm running a mac pro with 2 x 2,8 GHz Quad-Core Intel Xeon and 6GB of RAM.</span></div>
<div><br></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)">M</span></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)"><br></span></div><div><span lang="EN-US" style="font-size:8pt;font-family:Arial;color:rgb(26,26,26)"><br>
</span></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Mar 14, 2014 at 4:51 AM, Charles Goyard <span dir="ltr"><<a href="mailto:cg@fsck.fr" target="_blank">cg@fsck.fr</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">Alexandros Drymonitis wrote:<br>
> If you are aiming to JUMP to specific frames in<br>
> > the video or play it backwards you would choose a different codec<br>
> > than if you just want to play it from the beginning to the end<br>
> > linearly.<br>
><br>
> Could you give some examples? I don't know anything about this but would<br>
> really like to. Could you explain why is it like this?<br>
<br>
</div>This is because with some codecs, to save storage space/bandwidth,<br>
movies are made of a few full images (key frames), and partial images<br>
that hold only the difference with respect to the previous keyframe. Say<br>
there is 1 full frame for 24 partial frame.<br>
<br>
So if you jump to a partial frame, the computer has to seek to a<br>
keyframe and then to the diff frame, and rebuild the complete image from<br>
that.<br>
<br>
mjpeg is just more or less a series of JPEG images in a queue. So when<br>
you seek to frame x, there is less work to do. The downside is that<br>
files are very large.<br>
<br>
If you just read a movie linearly, you're good with keyframes and so.<br>
If you want to jump all over the file like crazy, it could be more<br>
efficient with mjpeg.<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
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