Have plan feature H.264 Encoding for Cameras on Mobile?
Have plan feature H.264 Encoding for Cameras on Mobile?
Thank you
Generally speaking H264 is supposed to be about twice as efficient as MPEG2. I think that's probably overstating the case somewhat (i.e. H264 isn't really twice as "good"). However you can certainly cut back somewhat from what you'd use with MPEG2.
Next consideration is the resolution/dimension of the final video. Do you want to go 640x480 (NTSC 4:3 aspect ratio) or something smaller? Since you're starting with video tape I'd suggest something like 480x360 (that should be large enough by a good margin to get all of the quality from a video tape). However, you might even want to drop down to 320x240 since that would be compatible with the video iPod and potentially other mobile, hand-held devices.
Finally, if you go with 640x480 I'd suggest something in the 3Mb to 4Mb per second range (for relatively demanding material, less for so-called "talking heads," and perhaps a bit more for extreme action), that would scale to 1.7Mb to 2.3Mb per second for 480x360, and 750Kb to 1Mb per second for 320x240. If you plan on using Front Row and want to store your video on a remote server (accessed either wirelessly or over ethernet) then you will definitely want to enable the "streaming" option when you encode the video. In fact you may want to use the streaming option in every case (for future compatibility).
If you plan on viewing this video on a computer display or any type of LCD or high-definition device you may also want to consider a de-interlace step for the 640x480 and 480x360 resolutions. You won't need that for the 320x240 video since 240 is exactly one half of the vertical resolution for standard NTSC DV (720x480). However, if you're using PAL you'll need to adjust all of the above resolutions to fit the proper form factors.
As always, the beauty will be in the eye of the beholder. Thus I'd suggest that you try something near the above and adjust accordingly (based upon what you see and like or dislike).
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H.264/AVC software encoding for cameras
Hi All,
Please let me know, how can we activate H.264/AVC video encoding (new feature in Flash player 11 [H.264/AVC software encoding for cameras]) using actionscript 3 in AIR application, I think, it could not be by default as there are no updates available for flash builder 4.5. So, how can we pick the encoding option. Any new API or methodology for this?
Any one any idea??H.264/AVC software encoding is not turn on by default. You need to assign the NetStream.videoStreamSettings property an H264VideoStreamSettings object. Here's a very simple example;
package
import flash.display.Sprite;
import flash.events.NetStatusEvent;
import flash.media.Camera;
import flash.media.H264VideoStreamSettings;
import flash.net.NetConnection;
import flash.net.NetStream;
public class TestAVC extends Sprite
private var _nc:NetConnection;
private var _ns:NetStream;
private var _camera:Camera;
private var _h264Settings:H264VideoStreamSettings;
public function TestAVC()
_h264Settings = new H264VideoStreamSettings();
_nc = new NetConnection();
_nc.client = this;
_nc.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);
_nc.connect("some fms server");
_camera = Camera.getCamera();
private function onNetStatus(e:NetStatusEvent):void
switch (e.info.code) {
case "NetConnection.Connect.Success":
_ns = new NetStream(_nc);
_ns.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);
_ns.client = this;
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_ns.publish("testAVC");
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New H.264/AVC encoding for cameras
Hi All,
Please let me know, how can we activate H.264/AVC video encoding (new feature in Flash player 11 [H.264/AVC software encoding for cameras]) using actionscript 3 in AIR application, I think, it could not be by default as there are no updates available for flash builder 4.5. So, how can we pick the encoding option. Any new API or methodology for this?
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Any one any idea??Hi All,
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OmniOutliner does however do this:
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Peter -
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D B RamachandraFrom the iTunes terms and conditions:
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I have a bunch of old videos and would like to encode them for watching on TV via Front Row (or similar) using H.264.
What would be a good data rate for this?
Thanks!Generally speaking H264 is supposed to be about twice as efficient as MPEG2. I think that's probably overstating the case somewhat (i.e. H264 isn't really twice as "good"). However you can certainly cut back somewhat from what you'd use with MPEG2.
Next consideration is the resolution/dimension of the final video. Do you want to go 640x480 (NTSC 4:3 aspect ratio) or something smaller? Since you're starting with video tape I'd suggest something like 480x360 (that should be large enough by a good margin to get all of the quality from a video tape). However, you might even want to drop down to 320x240 since that would be compatible with the video iPod and potentially other mobile, hand-held devices.
Finally, if you go with 640x480 I'd suggest something in the 3Mb to 4Mb per second range (for relatively demanding material, less for so-called "talking heads," and perhaps a bit more for extreme action), that would scale to 1.7Mb to 2.3Mb per second for 480x360, and 750Kb to 1Mb per second for 320x240. If you plan on using Front Row and want to store your video on a remote server (accessed either wirelessly or over ethernet) then you will definitely want to enable the "streaming" option when you encode the video. In fact you may want to use the streaming option in every case (for future compatibility).
If you plan on viewing this video on a computer display or any type of LCD or high-definition device you may also want to consider a de-interlace step for the 640x480 and 480x360 resolutions. You won't need that for the 320x240 video since 240 is exactly one half of the vertical resolution for standard NTSC DV (720x480). However, if you're using PAL you'll need to adjust all of the above resolutions to fit the proper form factors.
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seems to be much more subtle.
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I provide uncompressed avi and movs that in the final out come..., I know are broadcast at some level of MPEG.
eg 30 second HD TVCs at 2GB files become 50mb mpegs.
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Feature Request: File Management for Creative Cloud Mobile
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Feature Request: Offline files for Creative Cloud Mobile
It would be nice to store select files offline to show as a portfolio. While apps like Adobe Ideas and Photoshop touch can sync work with the creative cloud, the creative cloud app does not allow this even for select files. Being able to sync selected files and folder would improve this app.
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Please clarify availability of H 264 encoding in AIR for iOS/Android
Hello,
I've written an app to send a live camera stream via RTMP in H 264/Nellymoser from mobile devices. The app works fine on AIR when tested on my Win7 desktop, but when I publish to AIR 3.2 for Android or AIR for iOS, it seems that the H264VideoStreamSettings are simply ignored and the video ends up in Sorenson. Is H264 supported for encoding/publishing on AIR for mobile devices? If not, is this planned for the future?
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http://helpx.adobe.com/x-productkb/multi/release-notes-flash-player-11.html
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HT201335 Any technical reason for iPhone 4 not to have mirrorring feature?
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http://bbyurl.us/TandC
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Private Message -
Support for NVidia GPU hardware H.264 encoder (NVENC)?
The latest NVidia GPU architecture, Kepler, now has a dedicated hardware H264 acceleration block, NVENC.
It is similar in function/purpose to "Intel's Quicksync" (except that Quicksync works with more codecs: MPEG-2, VC-1, and H264. NVENC only supports H264 encoding.) The company claims the hardware-block can encode 1080p video much faster than the host-CPU alone (probably at the loss of some image quality.) This feature is supported on desktop NVidia GPUs with the model GT640, GTX6xx. And in laptop NVidia GPUs GT640M, GT650M, GT680M (and a few others.)
Does Premiere Pro CS6 take advantage of NVENC? If not, are there any third-party plugins that add NVENC-support to CS6?
If not, I'd like to try writing a plugin that uses NVENC, though that'd definitely be an ambituous undertaking!I have finished a 'proof-of-concept' NVENC Exporter plugin for CS6. This took much longer than I thought it would (mostly due to my inexperience in interacting with Adobe's 'suite' API.) And the beta-plugin is very rough around the edges (no audio or muxing support), and needs some further speed-optimizations, but works well enough for me to start basic testing and behavior characterization.
The following comments are based on my proof-of-concept NVENC-exporter plugin, run on a Geforce GTX650 1GB. The plugin is compiled from the NVidia NVENC Public Beta SDK 2.0 (Dec 2012) and Geforce 314.07 drivers (Feb 2013). The programmer-API to access NVENC is protected by a license-key. The SDK comes with a free trial-key, but doesn't indicate how it compares to a (purchased) retail-key (i.e. does it perform the same but with restricted features/functionality, or does a retail-key offer higher quality encodes?)
First off, how is the video image-quality (compared to the MainConcept H264 that Adobe bundles with CS6)? Based on naked-eye comparisons, NVENC is anywhere from slightly to somewhat worse. As such, since the quality delta was easily discernable at all bitrates, I didn't find it necessary to take objective psnr measurements.
(1) At "low bitrates" (eg. 6mbps or less at 1920x1080 24fps), NVENC is noticeably worse than Mainconcept. The fixed GOP-pattern (group-of-picture) really kills the output-video at scene-transitions, because the encoder doesn't make intelligent decisions about where to place reference-frames.
(2) At "high bitrates" (eg. ~25mbps for 1920x1080 24fps), NVENC is slightly worse than Mainconcept, though now the two are almost neck-to-neck. NVENC seems to have problems tracking very subtle color transitions. For example, on animated/computer-generated scenery (like a Disney cartoon), NVENC had shows a tendency to introduce blocking artificats into sky gradients and other tonal-gradients. Mainconcept was much better in this regard.
Next, what about speed? Speedwise, NVENC easily wins (as expected.)
(3a) For 1080p video, NVENC consistently finished straight "media-export" jobs in Adobe Media Encoder (i.e. straight "in to out" without any adjustments/changes to the source video) roughly 3x faster than the Mainconcept H264-Bluray codec. For example, NVENC needed 30 seconds to re-encoded a 120second Bluray clip. Mainconcept usually took 90 seconds. (Both encodes were single-pass VBR; run as video-only, no audio, no muxing.)
(3b) for 3840x2160 video, NVENC's speed-advantage shrinks to roughly 2x. (This is likely due to a very slow hostmem-hostmem frame-copy operation inside my plugin.)
(4) NVENC CPU-usage hovers between 30-40% during the Adobe Media Encoder session. Mainconcept always used near 90-100% CPU. (My machine is an Intel i5-3570K 4-core CPU.) If someone were comparing NVENC/Mainconcept on a 2-core laptop, the speed-difference would be closer to 6x. Even so, NVENC falls behind Intel's "QuickSync" technology (unfortunately, Intel doesn't offer a Quicksync exporter-plugin for CS6.)
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Roger that. Thanks for your time.
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RAM: Gskill Ripsaw F3-12800CL7D-4GBRM (2-2GB sticks)
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