I frame ONLY MPEG2 video?
Adobe Media Encoder documention states that:
M Frames
Number of B frames (bi‑directional frames) between consecutive I frames (intra‑frames) and P frames (predicted frames).
N Frames
Number of frames between I frames (intra‑frames). This value must be a multiple of the M frames value.
This is great... but Media Encoder only allows the settings to go to 1, not 0...
With a M and N Frame setting of 1, and reading the documentation, I am expecting to have 1 B Frame between every I Frame.
Am I wrong? It reads as if a 1 frame M setting would allow 1 B frame...
and the 1 frame N setting would also allow for one frame between each I frame, which would be the B frame...
I need ALL I frames in my video!!
And where does the Closed GOP settings come into all this?
Maybe someone could give me the M N and GOP settings needed to create an all I Frame MPEG2 video?
I'd love an explanation on how to translate the settings since I can't specify "0 Frames" between I frames, only 1...
Thanks!!
It's a Digital Spectrum MF-1040 plus
http://www.dsicentral.com/products/mf-1040/Default.html
The specs list mpeg 1,2 & 4. but when I called the company, the technician told me to use mpeg2 or .avi
My daughter can take a card out of a point and shoot still camera with video capability and it plays without a problem including sound.
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Hello All,
I'm having a very strange problem which just began this past week when I upgraded to QT 7.2 (darn me, I'm a video pro, I should have known better than to do this mid-project!). I am editing a film with HDV content: 1280 x 720 pixels, MPEG2 video (.m2v file type).
I have the MPEG2 plugin for QT.
When I open the file in QT Player, it plays the video almost 2.5 times faster than the audio, increasing the frame rate to do so. For example, if I view the Movie Properties for one particular file, and compare the sound track to the video track, it will claim that that the sound track has a duration of 7:03:24, whereas the video duration has a duration of 2:49:27. When watching the video, it plays it back too fast. When I import the file into Final Cut, the same "sped up" file is viewed.
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Thank you,
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I'm having a very similar problem with Encore. My menu items are distorting (a minor but infuriating squashing top and bottom) when previewed.
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DVD format SD PAL DV widescreen
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I have a MBP with Core2 2.4Ghz (2GB RAM, 250GB SATA HDD).
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Message was edited by: vrkiranQuicktime does play DVDs OK. Its not as smooth as VLC, but very acceptable.
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I-Frame Only MPEG in premiere pro cc
please help........ I dont have I-Frame Only MPEG preview file format in sequence settings. It is set to Microsoft AVI. I want to set it to I-Frame Only MPEG.
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Project will not render with 'I-Frame only MPEG'
Hey Adobe, I am posting this at your request.
I previously used to have an old Intel Core2 chip system.
I upgraded this so that my video editing life would be faster. I have a new motherboard, with a new intel I7-4770 @ 3.5Ghz chip. same memory (16Gb-1600), graphics card, hard disk, DVD drive, etc..
On the Core2 system, video projects which I worked on all worked fine. I mainly use a Sony Z5 to shoot video which creates .M2T files.
On my old system, running Premiere CC it ALL WORKED - no problems, but on the new build, it crashes EVERYTIME i try to render, with 'Error Compiling Movie - Unknown Error'
Having spent FOUR hours on the phone to your tech supports in India, they came up with a workaround. I stress - it's a workaround, not a solution.
They found that if i changed the sequence to be 'Custom' and then selected 'Microsoft AVI' (and any Codec, doesn't matter which) as the Preview File Format instead of 'i-Frame Only MPEG' then yes - it renders.
The tech told me that this was because 'M2T' files were fussy, and needed to be treated like this.
WRONG!
if this *needed* to be the case, then why did it work previously on my old system without any problem?
Also, if I take a project that crashes on my desktop PC, and copy it over onto my laptop, de-activate Premiere on my desktop and activate on my laptop and run in on there .. IT RENDERS FINE, using the 'I-Frame Only MPEG' setting.
Also, i shot some video with a Nikon D5100 which produces full HD .MOV clips, *AND THE SAME PROBLEM STILL OCCURS* when rendering on my desktop PC, and only renders when i switch the Preview File Format to be 'Microsoft AVI - so it's not related to the .M2T video file type.
So I can render stuff, but ultimately it's a workaround and not a solution, as when I am finished with a project, and want to archive it off I do so by exporting and choosing 'Match Sequence Settings', with with Microsoft AVI selected, it wants to therefore obviously export it as an AVI, which i do not want - I want to export it as 25mbps MPEG which is the original quality/format that it was shot at. When i try and do this with 'i-Frame Only MPEG' selected as the sequence type - you've guessed it, Media Encoder crashes
So. Why does i-Frame Only MPEG work on one machine (my laptop), but on my main machine (desktop) which i want to use, it doesn't? What piece of software/codec/file am I missing?
- i have installed from clean build of Windows
- i have deactivated and reactived Premiere CC
- i have uninstalled Premiere CC and reinstalled it
- i have uninstalled all Cloud CC programs and reinstalled them
- I have run CC cleaner too
- I have the latest video drivers for my graphics card (it is the same graphics card that worked just fine on my old system anyway, so is not the issue)
- I have full Windows/Admin permissions. it is not a permissions problem
please don't suggest any of those options. None of them work. I need someone who understands your software and knows what i-Frame only MPEG is to be able to tell me why it isn't working on my system. I am now past the point of anger (because i have lost several days worth of worktime - and thus money) and being upset (because it's massively frustrating when somthing that previously worked now doesn't), and am now just at the point of being bewildered that no one there can seem to tell me what is going on here, and how to solve it.
Many thanks,
Geoff.I have to put in my 2 cents...and first of all I'm sorry things are happening that are not FANTASTIC results... etc... but there may be ways to make things better... but this stuff is complicated and extremely computer intensive ( math stuff with cpu and ram and stuff ) .. so the platform is very critical to best results.. not just the software.
There's books on compression and how that stuff works ( lossless or not ) and it's all about changes from frame to frame and how to best make file size smaller while keeping every single pixel perfect in each frame... and this is unfortunately not standardized on planet earth. Different companies make up what they can to sell cameras and recording medium and so on.. there are some standards ( for broadcast and movies etc ) cause at some point some groups have to deal with delivery to PEOPLE to watch stuff.. and have decent quality to watch...
In general this is very complicated and full of problems cause there is no single work flow , and probably never will be .
What Jeff is talking about ( I think ) is that during the process of a computer program interpreting images ( frame by frame ) those pixels that have not changed a lot are described in a line of code by the software that says, " This stuff has not changed much if at all ". Some stuff from one frame to the next one DID change a lot ( someone walking or someone running.. the running changes more fast ) .. and so lines of code say , " this stuff changed a LOT "....
During the process of the software to determine what changed and how MUCH changed.. is complicated.. cause the program basically looks at frame A and then Frame F and notes the changes of pixels... and THEN ( as if that wasn't complicated enough ) the program then goes BACK to frame A and then ahead to frame J ... so now it has expanded it's look at what changes have occurred...
Now the ' CODEC " ( the specific codec used by the program you are running , like CC or avid or FCP ) is going to make it's best GUESS as to what really changed that matters the MOST to the image...so you basically get a nice image from A to J ..... but it is now compressed and taking up less room on your hard drive and ram etc....cause it is interpreting the image changes... and so on...
So if you had every single frame without any guess work and no compression to save space cause those pixels did not change between A and J .... you would have HUGE FILES .... and no benefit in terms of being able to edit anything on a little home desktop computer... even if you have a really powerful one.. it is not going to be good enough to do that stuff....
It would be unfair to say that adobe isn't doing the best they can to accomodate all the camera manufacturers " codecs " and give the best results they can , with a million different computer platforms and hardware out there you can buy off the shelf ....
The I frames and B frames and other frames have to do with the " guessing game " of changes in pixels, changes with every " action " in those ranges of frames, and is very complicated... but there are books about it and what standards exist can be researched and studied if you're into that stuff....
I am an idiot about this stuff but the main thing is dont give up.. and just try to be patient when things dont work out like you thought they would, and figure out what is going on so you can make things work the way you want...
and good luck ! -
Extraction Key Frames from a video
Hi all,
I would like to know what is the best way to extract keyframe from a video.
My Status (butr I can cahnge it)
I'm Marco and I'm using JMF; I need for an help because I don't know how to extract keyframes from AVI and MPG files.
I'm using the code posted in this forum for extracting all frame in a video with the adding of an if expression that in the accessFrame method that I report below:
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{color:#ff9900}
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So, I'm able to extract some keyframe, but i'm not sure it is the correct way and my dubt grows out of the fact that without the if expression highlighted in red, it seems that I have more keyframes (those ones with flag ==1040). Another problem is that it works only with AVI because MPG instead of 1040, they have alternate sequence of 32 and 1056.
Cheers and thank u
Marco>
With the code yoodleyee posted, frames can be extracted and converted from the raw decoded format into images, but no guarantee that the frame extracted is a key frame, isnt it?Actually, there is such a guarantee...because the FrameGrabbingControl isn't implemented in any video format that uses keyframes. So, if it works, then every frame of the video is a keyframe, and it won't work otherwise.
How can key frames be detected with JMF and then extracted with the code provided? Any tutorial or sample code about that?They can't be. You can write a custom codec that will give you access to every frame, regardless of the format, if you're wanting to get all of the frames.
Example: [http://java.sun.com/javase/technologies/desktop/media/jmf/2.1.1/solutions/FrameAccess.html]
But JMF doesn't have any way of dealing with key frames directly, at least that I am aware of. -
Capture JPEG from MPEG2 video file
Hello friends,
I want to extract a single JPEG image from a mpeg2 video file. The user input will be the number of seconds since the start of video when the image should be captured
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I frame only 4:2:2 encoding settings?
Hi
Can someone please tell me the AME setting to create an MPEG-2 Program Stream with the following specs?
625/50 PAL
Video Size: 720 x 576
50 Mbps CBR I frame only
Profile: 422P@ML
Colour Sampling: 4:2:2
Many thanks
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PS. FYI, these are the SD (PAL) video specs for AdStream UK digital delivery service.Thank you for the MediaInfo tip.
I have downloaded and run the file I created. Details are below but I am not sure where I should read 'I-Frame Only'? The entire broadcast industry uses that term but for some reason neither Adobe nor MediaInfo mentions anything about it? Also, how can I produce 4:2:2 instead of 4:2:0 as I produced?
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
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Format settings, Matrix : Default
Format settings, GOP : N=1
Duration : 1mn 20s
Bit rate : 50.0 Mbps
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 4.823
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
Stream size : 478 MiB (97%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
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How can I see MPEG2 video format on IPAD ?
Could anybody tell me how can I see mpeg2 video format on IPAD 3 ?
Thks.Apparently you can't.
Pad2, the new iPad Supported Video Formats & Movie Formats
H.264 video up to 1080p, 30 frames per second, High Profile level 4.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
MPEG-4 video up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps per channel, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats;
Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format
Cheers, Tom
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