broadcast monitor playback
by ayman abdel-basset
on
Oct 27, 2009 at 3:49:38 pm
Hi,
In my company we have many edit suites of FCP with kona LH.
we usually face problem.
my self didn't face with the blackmagic..
when we import any QT file (for example) H.264.
then insert it in sequence of aja HD uncompressed.
it gives red bar for render!
when we render it and play it back!
it doesn't play on broadcast monitor!
So i import this H264 (for example)into new sequence.
then i click OK for the dialogue to make the sequence same acid of the file..
then hit play!
no play on broadcast monitor!
so i found solution for it that i open the clip in QT player then RExport it to QT apple prores or any aja codec file..then it plays fine on the broadcast monitor..
i see this is crazy especially if long time file...
this problem happen in all FCP suites we have(4 suites)
for any QT i put on the timeline created by codec different than prores or aja..
(animation,none,h264,pal....)
in the blackmagic it was not happen!
so where is the problem??
Re: broadcast monitor playback by Jeremy Garchow on Oct 27, 2009 at 4:32:22 pm
[ayman abdel-basset]"so where is the problem?? "
FCP does not support rt playback of codecs that aren't supported by the suite, such as h264. h264 is a web delivery codec, not an editing codec. You need to conform all video to something that is enabled in FCPs rt engine.
Re: broadcast monitor playback by Jeremy Garchow on Oct 27, 2009 at 7:00:07 pm
[ayman abdel-basset]"same problem happen when i add animation codec or any other codec than prores or aja acids.. "
Animation isn't a real time capable codec either. You need ot place the movie in a timeloine that has a standrd video codec, render and then you should have rt playback. If oyu son't, that's becuase your timeline and video output aren't matching.
Re: broadcast monitor playback by ayman abdel-basset on Oct 28, 2009 at 7:45:33 am
Hi,
thanks for your reply..
i do know this..
BUT with my experience with Blackmagic when i add animation codec movie on timeline with native codec of the video card..
it gives me red bar (which mean your say)..but when i render this it goes real time!
because i need animation codec on timeline line for alpha..
Re: broadcast monitor playback by ayman abdel-basset on Oct 29, 2009 at 7:05:51 pm
Jeremy
Thank you for your reply,
i figured the problem..
that i work HD and the aja kona sequence presets to play on broadcast monitor hasn't all codecs of the QT again i mean HD..
animation,H264 is not of them!
so i should from begin work with the codecs found in the presets or render any other codec for one of this presets..
Re: broadcast monitor playback by Mitch Ives on Nov 2, 2009 at 8:38:57 pm
[Jeremy Garchow]"FCP does not support rt playback of codecs that aren't supported by the suite, such as h264. h264 is a web delivery codec, not an editing codec. "
And this is getting less clear all the time. Right now, the h264 clips from a 5D or 7D Canon can be thrown onto the FCP timeline, and if you say yes when asked if you want the sequence to be changed to match the clips, they play on the FCP timeline in realtime without rendering. So, somewhere deep inside, FCP has this ability and a codec for h264 playback.
Of course the Kona can't play through to the monitors, so it's a hollow victory.
I guess at the end of the day, we have to define what an editing codec is, or perhaps it's being redefined for us?
Re: broadcast monitor playback by walter biscardi on Nov 2, 2009 at 8:49:48 pm
[Mitch Ives]"And this is getting less clear all the time. Right now, the h264 clips from a 5D or 7D Canon can be thrown onto the FCP timeline, and if you say yes when asked if you want the sequence to be changed to match the clips, they play on the FCP timeline in realtime without rendering. So, somewhere deep inside, FCP has this ability and a codec for h264 playback. "
The proper workflow for H.264 originated material is to convert it to something like ProRes or ProResHQ prior to dropping it into the timeline. You can use compressor for this.
Walter Biscardi, Jr.
Editor, Colorist, Director, Writer, Consultant, Author.
HD Post and Production Biscardi Creative Media
Re: broadcast monitor playback by Jeremy Garchow on Nov 2, 2009 at 9:02:02 pm
[Mitch Ives]"they play on the FCP timeline in realtime without rendering. "
WEll yes, that's because the clip and timeline codec match. Now, try to do a cross dissolve, a 3 way cc, or whatever, and you will see just how non rt it is. Most likely, those clips are RGB, so when does the conversion to YUV happen?
[Mitch Ives]"I guess at the end of the day, we have to define what an editing codec is, or perhaps it's being redefined for us?"
An editing codec in FCP terms, is a codec that has real time effects and real time playback in the FCP timeline out of a capture card. Something that could be played back and assemble edited to tape in real time without a render would be a couple of other requirements.
Re: broadcast monitor playback by Mitch Ives on Nov 4, 2009 at 4:47:19 pm
My point was that they can even play at all. I wouldn't try to edit that way, but I find it interesting that it can find something (a codec) that I cannot locate manually that will play this? One wonders if Apple could build on this, especially since it appears Avid can edit these files natively (haven't verified it myself).
Re: broadcast monitor playback by Jeremy Garchow on Nov 4, 2009 at 4:55:53 pm
[Mitch Ives]"My point was that they can even play at all."
An h264 file? An iPhone can play an h264 file. That's not the challenge.
[Mitch Ives]"One wonders if Apple could build on this, "
Yeah, it's called iFrame and it's coming to iMovie.
[Mitch Ives]"especially since it appears Avid can edit these files natively (haven't verified it myself). "
Avid usually transcodes files upon import, a process very different to FCP. At that point, you aren't playing back h264 files, but rather Avid codec files.
Re: broadcast monitor playback by Mitch Ives on Nov 5, 2009 at 4:13:06 pm
[Jeremy Garchow]"Avid usually transcodes files upon import, a process very different to FCP. At that point, you aren't playing back h264 files, but rather Avid codec files. "