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Show all posts by userPost here if you are having issues with Apple Compressor, codec and format conversions, making files for the web, or issues or questions with other compression programs.
1080/50p in FCPX? - 12 years agoDavid Pogue's statement "When you create a new project, you can specify any frame rate or size you want, right in the import dialog box" was declared "95% wrong" by Richard Harrington in his blog. I won't go to FCPX-land to be restricted as in Hell, but a friend is asking if FCPX can at least handle 1080/50p. Can it? Dennis Couzin Berlin, Germanyby dcouzin - Café LA - X Re: Compressor 4? - 12 years agoJon: thanks much for the info. Dennis Couzin Berlin, Germanyby dcouzin - Compressor - Media Compression and Conversion Compressor 4? - 12 years agoShould I upgrade from Compressor 3.5 to Compressor 4, if I'm concerned only with quality and control, not speed? 1. Is Compressor 4 a freestanding application (with no need for FCP-X)? 2. Does Compressor 4 output higher quality results than Compressor 3.5? I find 3.5's main weakness in its deinterlacing, rescaling, and other "frame controls". 3.5's "optical flow"by dcouzin - Compressor - Media Compression and Conversion Re: Compression to put feature cut online - 12 years agostorm666: Withoutabox or without your pants on. H.264 is somewhat more efficient compression than the MPEG-2 of SD DVDs. So 2 GB is not terribly skimpy for a 90 min. SD video in H.264. In Compressor Inspector; Encoder pane; Video: Settings; Data Rate: Restrict to: X kbits/sec; X must be a little less than 4.4 times the number of minutes in your video. For best results do video noise reductby dcouzin - Café LA HD Testchart: tiff to video - 12 years agoBelle Nuit publishes an interesting looking HD Testchart here. This tiff file must be transformed to video for use. I wanted to make 8-bit uncompressed 4:2:2 and tried to use FCP to do it. The RGB values in the tiff must be understood as R'G'B' values or else the demarcations at 16 and 235 in the Testchart make no sense. A grey patch in the tiff with R'G'B' values (x,x,x) should become a grby dcouzin - Café LA Re: HD footage to SD DVD looks like CRAP!!!!! - 12 years agoajmax: Compressor's MPEG-2 compression is strictly amateur. Commercial SD DVD's use such systems as ccxstream. Intelligent apportionment of color, resolution, and motion compression, scene-by-scene (even second-by-second) gives incomparably better results than simpler software can. I'm strictly amateur. I use Innobits Video Purifier to do the down-resolution. It does it more cleanly than Coby dcouzin - Café LA Re: Compressor's 25p and 25i mpeg-2 - 12 years agostrypes, it's hard work reconstructing the logic in this do-it-all program. The encoder pane offers a "Video Format" tab with a "Field Dominance" choice only for the MPEG-2 file format. For each other file format it behaves differently. For the QuickTime Movie format, field dominance may or may not be selectable within the Video Settings window. With ProRes compressionby dcouzin - Compressor - Media Compression and Conversion Re: can FCP properly interlace progressive material? - 12 years agoAndy, thanks for confirming. Dennis Couzin Berlin, Germanyby dcouzin - Café LA Re: Compressor's 25p and 25i mpeg-2 - 12 years agoI made a little 50p test video to study interlacing. Each frame consists of alternating black and white video lines. Also the frames alternate between black at top and white at top. So a "proper" 25i conversion of this 50p will be all black or all white depending on whether the interlace is top first or bottom first. The test video can be downloaded here. Dennis Couzin Berlin, Gby dcouzin - Compressor - Media Compression and Conversion Re: Compressor's 25p and 25i mpeg-2 - 12 years agostrypes, the input format is progressive. The output format is interlaced according to the Field Dominance setting in the Video Format menu. Then there are two surprises. (1) With Frame Controls off, the greyed out settings in that menu are nevertheless operative. (2) Despite progressive input and interlaced output, Output Fields can still be set "Same as source". It would makeby dcouzin - Compressor - Media Compression and Conversion Re: Compressor's 25p and 25i mpeg-2 - 12 years agoAnswer to question what Compressor made: The 25i MPEG-2 is indeed 25i but of a bogus kind. Compressor in effect reduced the 50p prores source to 25p, ignoring every other frame, and then split each of the 25p frames two fields. So the 25i MPEG-2 contains the same spatial information as the 25p MPEG-2, and a player could display them identically. The 25i MPEG-2 is bogus because it contains falby dcouzin - Compressor - Media Compression and Conversion can FCP properly interlace progressive material? - 12 years agoI wish to convert a 50p clip to 50i. The proper conversion takes the first field from the first frame, the second field from the second frame, etc. I.e., it simulates what a 50i camera would have shot instead of the 50p camera. When the 50p clip is dropped into an empty 50i sequence FCP asks whether it should change sequence settings to match the clip settings. I say "No". The sby dcouzin - Café LA Compressor's 25p and 25i mpeg-2 - 12 years agoI have a 720x576 50p prores project and wish to make an SD DVD. 50p crunches nicely to either 25p or to 25i (which I prefer to call 50i, but use Apple's terminology here). In Compressor, when making the MPEG-2, in the second tab of Inspector, with SD DVD chosen for Stream Usage, Frame Rate 25, there are the progressive and interlaced options. So Compressor believes that both 720x576 25p anby dcouzin - Compressor - Media Compression and Conversion Re: Bringing in 1080 60P AVCHD from a Panasonic HDC-TM700 - 12 years agoAlso HDVoltaic. It transcodes much slower than ClipWrap, but succeeds when ClipWrap fails -- about 2% of clips in my experience. So you probably should have both softwares. Dennis Couzin Berlin, Germanyby dcouzin - Café LA Re: recovring mts files - 12 years agoIn rare cases ClipWrap can read .mts files Voltaic HD can't. Usually it's the other way round. Can all your .mts files be corrupt? PhotoRescue does .mts. Maybe PhotoRescue can salvage parts of the files that Voltaic HD or ClipWrap can transcode. Dennis Couzin Berlin, Germanyby dcouzin - Café LA Re: Playback to monitor from Black Magic card - 12 years agoThanks Ben for the reminder about new video standards. There's a nice map of the post-NTSC/PAL/SECAM world in the wikipedia "file:digital broadcast standards.svg". ATSC includes 25/50 Hz video, and I'm tickled that it even includes 1080 p50. But the map shows ATSC limited to North (and parts of Central) America. What differences between ATSC and DVB must editors heed? Denniby dcouzin - Café LA Re: Reasons why NOT using a LCD TV as monitor? - 12 years agostrypes, the EBU statement is recognizing that while a typical CRT had gamma approximately 2.5 (value per Poynton 1996), gamma precorrection was established at around 0.45 (= 1/2.2). So the precorrection was indeed an undercorrection for the monitor and the reason could only have been visual preference. The end-to-end system gamma was 0.45 * 2.5 = 1.125. EBU exaggerates when they say itby dcouzin - Café LA Re: 16-235 > 1-255 - 12 years agoKoz: BT.709's 16-235 and 16-240 ranges are RGB 0-255 ranges. For example, white with Y'=235; CB=CR=128 becomes white with R'=G'=B'=255, black with Y'=16; CB=CR=128 becomes black with R'=G'=B'=0, red with Y'=62; CB=102; CR=240 becomes red with R'=255; G'=0; B'=0, etc., according to the BT.709 equations. The sRGB primaries are exactly the same as the BT.709 primaries. And the quasi-gamma for sby dcouzin - Café LA Re: Final Cut Pro X - still Pro - 12 years agoHas anyone heard, or can anyone predict, how FCP-X will handle video fields? Fields have been a weakness in FCP. Avid lets you view fields; FCP does not. AE can make a proper 60p -> 60i conversion by just discarding the unused lines; FCP makes an artifacted mess of it. Proper handling of video fields was at the top of my wish list for FCP revision, but Apple didn't ask me. Dennis Couzby dcouzin - Café LA - X Re: Reasons why NOT using a LCD TV as monitor? - 12 years agostrypes Wrote: ------------------------------------------------------- > Apple monitors and Dell monitors do look pretty > good for computer monitors, but I would still > avoid it for critical color work because they were > not built for video monitoring. In theory, any monitor having a good black and a color gamut enclosing the BT.709 color gamut can be profiled for criticalby dcouzin - Café LA Re: Reasons why NOT using a LCD TV as monitor? - 12 years agoJude, saturation is a property of a color. What you see on the vectorscope are properties of the video signal. When the vectorscope assigns color properties to the video signal it is presuming how the signal will be displayed as colored light. BT.709 specifies R, G, B primaries, like signal lights are specified, by their CIE coordinates. Makers of broadcast monitors go to pains to map theby dcouzin - Café LA Re: Reasons why NOT using a LCD TV as monitor? - 12 years agoColor preference is certainly subjective, but the color that a video is supposed to produce, according to BT.709, is objective. Eyes can make good adjustments for brightness and tint deviations from the BT.709 specified color, but not so good for saturation error. So the rather low saturation of the BT.709 primaries should be taken seriously by the editor. A too high saturation monitor, witby dcouzin - Café LA Re: Reasons why NOT using a LCD TV as monitor? - 12 years agoBT.709 says that the R, G, B primaries have (x,y) chromaticities (0.640, 0.300), (0.150, 0.330), (0.600, 0.060), respectively. The only "scope" that will say whether your monitor is making these colors is a colorimeter. The colorimeter must physically measure the light from the screen. One cheap and adequate colorimeter is DataColor's Spyder3Elite used with their OptiMeter software.by dcouzin - Café LA Re: Reasons why NOT using a LCD TV as monitor? - 12 years agoMy understanding of the Apple LED Cinema Display (coming from wikipedia) is that it's actually an LCD display making use of a white LED backlight. (True LED displays have R,G,B LEDs at each pixel.) But if the white LED backlight is comprised of R,G,B LEDs then the Apple Display can have "crazy gorgeous" color. This is due to the three primaries being nearly on the chromaticity boundaby dcouzin - Café LA Re: capturing screwy QT playback - 13 years agostrypes, thanks much for the perfect software solution. (Colorful night street scene in Jalgoan India -- a different "Dance of the Spirits".) Dennis Couzin Berlin, Germanyby dcouzin - Café LA capturing screwy QT playback - 13 years agoI like the way QuickTime is mis-playing a certain mpeg-4 .mov file. It skips, freezes, and slowmo's in a beautifully screwy way. The playback is not quite the same twice, influenced by available system resources. How can I capture this QT playback? Two methods haven't worked. FCP can record from the timeline to tape, but FCP playback of the same .mov file doesn't do what QT playback doesby dcouzin - Café LA Re: Erased wrong Drive in disk utility when formatting. - 13 years agoJroweski, recovery works if you did a quick formatting, not if you zeroed the drive. Which recovery software to choose depends on what kinds of files the drive contained. For picture and video files I recommend PhotoRescue, just $29. Dennis Couzin Berlin, Germanyby dcouzin - Café LA Re: ProRes 422 (HQ) Progressive or Interlaced? - 13 years agoMultiple generations involving ProRes recompression, especially if there are size changes so the 8x8 blocks do not remain fixed, are noticeably less lossy in HQ than in standard (which in turn are noticeably less lossy than in LT). Decision among the ProRes flavors should be based on what editing steps are anticipated. strypes and I did some experiments on this in September which he might wishby dcouzin - Café LA Re: QuickTime playback framerate artifacts - 13 years agoQuotestrypesI don't know about getting ICC profiles and LUTs to work on a computer display and if you can get the display to show full and accurate 709 gamut.QuoteD-MacIf a monitor (pretty much all of them under $1000, or even more) can't display a full gamut for video, then nothing you do will make it do so. I used the excellent Spyder3Elite tool to measure the primaries of my Samsung 305T moby dcouzin - Café LA Re: Question about H.264 - 13 years agoQuotestrypes Rather, 24 Mbs I got my 44 Mb/s figure from a statement in a Canon 5D white paper: "...a 4GB memory card can record approximately 12 minutes of movies at Full HD resolution..." (page 18; repeated on page 19). There are 8 bits in a byte and 60 seconds in a minute. Your figure of 24 Mb/s would be very skimpy for Full HD, considerably less than Blu-ray. 44 Mb/s on the otheby dcouzin - Café LA |
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