H.264 encoder question

For my streaming application I need H.264 video content with sliced frames and H.264 slice size should be configurable. I tried QT Pro and found that it partitions a frame into 2 halves. Is it possible to configure the encoder to produce more slices?

You answered my question in #2. I am not sure I understand how services such as ustream.TV can webcast in H.264/MP4? Since smartphones can send the stream only in FLV/H.263; Do they re-encode the livestreams from H.263 -> H.264 at the server using FlashMediaEncoder?
Another question: lets say if I can somehow encode the video myself (H.264) at client side in realtime; can I publish it to FMS as MP4/H.264?
Thanks!

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H.264 Encoding Questions...???

I am now starting to convert different video files to my iTunes for my AppleTV and have some questions...
BTW, I am using VisualHub and using H.264 - high quality setting for encoding on a G5 iMac with 1GB RAM.
1. Approx. how long should it take to encode a 700MB .avi file to .mp4, using H.264?
I am transferring all these TV shows I have that are around 700MB .avi files and they are taking anywhere from 400-600 minutes per file!!! That seems very long to me.
2. Do .VOB files typically take even longer to encode using H.264?
The few .VOB files I have tried are taking 800 or so minutes for a 2-3GB .vob file.
Is there something else I should be doing? Are these times normal?
Any tips or suggestions for encoding?
Thanks in advance.

Don't use VisualHub myself, but do know that h.264 encoding is extremely processor intensive and time consuming. The actual source material probably won't matter too much unless it's high definition or uses a particularly computationally intensive algorithm to decode (and for most decoding is miles faster than encoding).
For example, on my iMac (2.16GHz Intel core 2 duo) converting a 2-3GB '.rec' TV recording from a Topfield PVR (which in essence produces MPEG2 transport streams), via MPEG Streamclip can take 3-4 hours for say a 90-120 minute program, and that's without using 2 pass encoding.
VisualHub is regarded as one of the faster converters, but High Quality setting will take longer than 'Standard' and the 'Go nuts' option will take even longer.
Hopefully (though it may not be what you want to hear) someone with a G5 and VisualHub will reply to confirm the sort of encoding times you're experiencing - I say hopefully as if their times are much faster it points to some other factor than VisualHub.
Elgato make a hardware USB h.264 encoder which is supposed to speed up encoding considerably but it only accelerates specific applicatiosn (eg iMovie) or their own conversion application (so far - the latest MPEG Streamclip release suggests they will add an option to harness it if possible/feasible - it may not be).
There are mixed reports on the Elgato device - biggest gripes being lack of customisable settings and an 800x600 resolution maximum. I've got one on order - for some older stuff recorded off a PVR it'll probably be more than adequate but for newer things software encoding is likely to be better. Time vs quality trade off really.
Best h.264 encoding results for most at the present time will almost certainly be achieved in customisable converter software - there are probably professional high quality h264 hardware converters available but these would be prohibitively costly for most of us.
AC

H.264 encoding question

Let's say you have a typical Sony consumer camcorder that records video in H.264 and you produce a movie using a sequence created with the same settings as a native clip and encoded using same settings as sequence.
Then let's say later you want to encode that movie to another format, DVD or Vimeo or whatever. Is there a big difference between encoding from the aformentioned production file vs. the source clips? In other words - in this case - can that production file essentially act as a lossless compression format if created in this way?

While H.264 is more efficient than MPEG-2 for instance, providing decent quality at low bitrates, it is a lossy codec. Any time you re-encode your video, there is a quality loss. If possible, your best bet is to encode to various output formats direct from the Premiere sequence, using the original source material, so you are going from the camera clips direct to destination clips, with only one transcode taking place.
If you must create a "master clip" first that you will later create other files from, then you want that master to be a high-quality format. "Uncompressed" video takes up crazy amounts of space, so you'll want to find a codec that is considered "visually lossless", which will provide a high quality image with manageable size. Note these files are NOT for upload/web, they are too big, these are for keeping a master clip on your hard drive for archiving.
On the Mac, use Apple ProRes. On the PC, you can use the Avid DNxHD or Lagarith codecs, both available at no charge. You might also look at the Cineform codec. There's other options, but these are popular.
Thanks
Jeff Pulera
Safe Harbor Computers

Highest quality Blu-ray disc encoding question ...

I did a bit of searching on old posts, but still wasn't clear on the answer. My source footage is 1280x720, 59.94p and came from a Contour+ helmet camera where the files are stored in a .mov file with H.264 encoding.   My video is only 9 minutes long.   What is the best method to produce the highest quality single layer BD out of PP and Encore in this case?
One response I can envision is that isn't going to matter in this case given the camera/source. Otherwise, would one be better off using Adobe Dynamic Link and letting Encore choose the settings or selecting the format/preset and tweaking the video settings in PP and importing the resultant files into Encore?
If PP, I have seen some posts saying MPEG2 Blu-ray will produce a better result if the bit rate is cranked up high. But then others imply H.264 will likely come out better.   I also noticed that the H.264 video settings allow increasing the bit rate there as well.
I will have a question on video settings depending on the answer above.
Thanks!

Thanks Ann. Everyone else confer or do we have any MPEG2 advocates?   Assuming H.264, what video settings would you change from the default beyond the frame dimensions and frame rate? I'm a layman/consumer, but at a glance I thought perhaps "VBR, 2-pass" would have merit as I thought I read somehwere that produces a better result (encoding time doesn't matter for me).    What about increasing the Target and Maximum Bitrate sliders all the way to the right (my video is short)? What about the Render at Maximum Quality check box (I'm still confused on that one and when to use it)?

Very Slow H.264 Encoding in FCP 10.1.2 and Compressor 4.1 on nMP

I have a fully maxed out 12-core nMP and editing with this machine in FCP 10.1.1 has been a delight. I recently completed a 4K project from footage shot with the Sony AX-100 and then output the project from FCP X using File>Share>Master File to ProRes 422. This operation occurred in about the same length of time as the length of the project (18.5 min.). I then brought this 75 GB ProRes .mov file into Compressor 4.1, and set up Compressor to encode to an H.264 file at 70 Mb/sec. This encode to h.264 is only 1/4 complete at 48 min. and it appears that it will take Compressor about 4 hours to encode this 18 min. project to h.264. Furthermore, I noticed that with the share to a master prores file FCP X was using 50-60% of my total CPU resources while the encode to h.264 in Compressor is using barely 16% of the total CPU. Thus it appears to me that while FCP 10.1.1 is optimized for the nMP, certainly Compressor 4.1, at least for h.264 encoding, is not.
My question is basically what am I missing? Is there a better workflow than using Compressor 4.1 for high bit rate h. 264 encoding of 4K? If so, what is the best way to use my nMP to get a high bit rate h.264 4K file for sending to YouTube and other online streaming?
Thanks for sharing any thoughts on this you may have.
Tom

Russ,
Thanks for responding.
I am encoding only a single project from FCP X in Compressor 4.1 and using only a single instance of Compressor. I don't really see that using multiple instances of Compresor with a single job would be helpful, but perhaps I don't understand something.
The project has now been encoding for 2.5 hr and is slightly less than half complete. The CPU usage is still at 16-17%. Overall this seems like a ridiculously slow encode to h.264 from a ProRes 422 file in Compressor 4.1.
Here are some thoughts on alternatives that I may try. (1) Take the Pro Res 422 file into Adobe's Media Encoder CC and encode it to high bit rate 4K h.264. (2) Take the Pro Res 422 file into Handbrake and encode to high bitrate 4K h.264. Handbrake does seem to make far more use of the nMP's CPU's than Compressor 4.1. Don't know about Media Encoder since I have not tried any h.264 encoding in Media Encoder.
The irony is that my nMP will play then entire 18.5 minute 4K project from the timeline with virtually no dropped frames, but rendering it to h.264 at 4K and high bit rate seems to take forever.
If you have any other thoughts, I would love to hear them. Thanks so much for responding, and I would love to hear from any FCP X experts who are encoding 4K to h.264.
Tom

Premiere Elements 11 H.264 encoder ignores max bitrate and only obeys target bitrate

H.264 encoding target bitrate is followed but max bitrate is ignored. I have source file that is 24mbps CBR and have chosen to encode at a target of 15 mbps and a max of 24mbps. When i monitor the resulting encoded bitrate, has no peaks. It's basically CBR at 15 mbps. Then if I set the target at 1 mbps and keep the max at 24 mbps, i get a highly compressed video that has no peaks but a constant 1mbps datastream. Why does it not obey the max bitrate setting and encode some significant peaks into the file?

Steve,
I do agree that asking adobe would be best. However, at the time of posting, Adobe was unavailable and unwilling to open a chat window. Regardless of the type of camcorder I have, the question is still valid. My goal is to figure out the right balance of quality and bitrate. I see VBR as a very useful feature that I've used before with much success. As mentioned before, the current implementation seems a little lacking. As it sits right now, I'll just set everything to CBR and pick the minimum bitrate that properly balances quality and storage space. Whether the actual progam is classified as consumer or pro, I still expect a feature to work. Being a consumer program does not remove the requirement for a feature to work.
In regards to your camcorder question. Yes, there are "consumer camcorders" that create AVCHD video files using the H.264 codec. I happen to be using a Canon Vixia HFM400.
Ken

FLV supporting but .mp4 (H.264 encoded) video not supporting in mobile browser?

Hi
I want to know one things, is there any other settings required to publish the swf file for playing mp4 file in mobile browser also. I am able to play ".FLV" in mobile browser but not able to play ".MP4" (H.264 encoded) in my mobile browser.
MP4 file required Flash Player 10 to play video I know this,I can watch video from youtube.com in mobile bowser also.
Please look at the following url which is not opening in Mobile browser but can open in computer broswer.
http://karzzzz.bigflix.com/m/
I want the above url to be play in both computer and mobile browser also as it calling .mp4 file from Flash Media Server.
Thanks
Sunil Kumar Sah

Are you using Flash Lite Plug-in or Flash Player Plug-in on your mobile browser. I have a feeling that you are using Flash Lite Plug-in and flash lite plug-in (latest is 4.0 i suppose) does not support H264 encoded files.
MP4 file which you are playing from youtube might not be H264 encoded , it might be On2 VP6 which is supported in MP4 container.

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?
Thanks!

Unfortunately, the release notes say H.264 encoding from AIR is for the desktop version only:
http://helpx.adobe.com/x-productkb/multi/release-notes-flash-player-11.html
H.264/AVC Software Encoding for Cameras (desktop) — Stream high-quality video from your computer's camera with higher compression efficiency and industry stanard support, enabling both immersive real-time communications such as video chat/conferencing and live video broadcasts.

H.264 encoding issues with Premiere Pro CC 2014

After updating to Premiere Pro CC 2014 yesterday, I see encoding artifacts on my H.264 exports.
Same source video imported into CC v2014 and v7, and exported using the YouTube 1080p 29.97 fps settings. The artifacts manifests itself as softness/blurriness in parts of the image every few seconds, especially notice the area with a red circle below.
Here are the source file (GoPro HERO3 Black Edition), the v2014 render and the v7 render.
Original: https://drive.google.com/file/d/0B2rJe0xgMTxFYXJiMjZpZ0stUzQ/edit?usp=sharing
CC v2014 render: https://drive.google.com/file/d/0B2rJe0xgMTxFQ1B0Z09GS3I0a1E/edit?usp=sharing
CC v7 render: Premiere Pro CC.mp4 - Google Drive
[Version numbers corrected.]
Message was edited by: Jim Simon

Mark Mapes wrote:
This is a known issue introduced in CC2014.0. Some h.264 encodes have blurriness or noise periodically in some areas of the frame. The problem is most pronounced in regions of the frame with very little detail, like grass or pavement--or the T-shirt in the sample frame. We are working on a fix. Before you ask when the patch will be forthcoming, I'm not authorized to even hint at the timeframe.
Unfortunately, the only real workaround is to export to a format other than h.264. If that's not an option for you, then your best bet is probably to keep working in CC7.2.2 until the patch is released.
Sorry, but thats not completely true and by far not the correct answer:
The problems with random artifacts occurred with the introduction of a new version of H264 in CS6 but there you still had the option to export with the previous H264 Version via Media Encoder.
Since the previous H264 version is not available in CC, using CC7.2.2 is not a solution either.
BTW
Updating to CC and using the new Mac Pros with Mavericks is currently a total mess - no open cl rendering, random crashes, no usable h264 ... thanks adobe!!
... but we can track masks in premiere now ... wow!

Issue with Adobe Encore CS5.1 and Matrox MAX H.264 encoding on Windows

Here's some information on an issue that we've identified with Matrox products and Encore CS5.1:
"Issue with Adobe Encore CS5.1 and Matrox MAX H.264 encoding on Windows"

Still flickering on Encore even when rendered in MPEG-2 DVD in Pemiere Pro CS5.5. Looks perfect in Premiere Pro.
Any other ideas?
EDIT: Was looking for Google for people with similar problems to me and I came across this http://forums.adobe.com/message/3959757?tstart=0
I am currently re-rendering the video in PAL DV Widescreen MPEG-2 DVD and using maximum render quality.

H1 footage & premiere deinterlace encoder questions.

Hi all,
I recorded some footage on a H1 in 60i HD (HDV). Used Premiere CS3 preset HDV 1080i 30 (60i) to capture it.
Capture question...
1. Should i buy cineform aspect or prospect HD to convert it before editing in premiere CS3?
Adobe media encoder questions...
2. Should i deinterlace the footage first by selecting "Deinterlace" in the from the output tab?
I was reading some adobe livedocs info that its a good idea to do so, even though canon says their 60i, 30f, 24f is as good as progressive.
3. should i choose "HDTV 1080i 29.97 High Quality" or "1440 x1080i 29.97 High Quality"?
The H1 captured output from tape is 1440x1080i. The encoder HDTV preset outputs 1920x1080, the other preset obviously outputs 1440x1080.

1. I use Cineform with great results and would indeed convert it to cineform BEFORE editing. It converts the 4:2:0 colorspace to 4:2:2 and is better to edit with, along with the fact it also coverts long GOP to almost a frame based compressin.
2. Cineforms method of "deinterlaceing" is different than Adobe's.
I have tried both. It seems that Cineforms is better. There is a LONG post under HDV to SD conversion. Read it.
But, it seems to me that if you keep it interlaced, motion seems smoother and more natural.
Adam Wilt did a good review of the HL and stated that the "F" frames are really progressive frames made from interlaced CCD's. The frames do lose a little vertical resolution.
I would either shoot in F and keep it there, or shoot in I and keep it there.

AME CS5, Quicktime & H.264 encoding - very poor

Hi all,
I seem to be stumped on an encoding issue - whenever I encode .mov files with the H.264 codec, they always come out looking like, well like a first generation web video - ie like S$*T.
My best guess is that the profile is preset to use 'baseline' - if so, is there a way to change this? I can't find any options to change to change the profile, or levels, or anything with regards to H.264 - there is a "codec settings" button, but that is grayed out.
Am I just a dummy and missing some key setting in the interface?
If I go back to CS3 and export with the same settings, I get great looking video - but of course since the project was edited in CS5, I can't go backwards.....
If I am a dummy, can anyone point me in the direction on how to get good looking .mov videos out of AME CS5?
Thanks,
~Mike

whenever I encode .mov files with the H.264 codec, they always come out looking like, well like a first generation web video - ie like S$*T.
I did a quick test of an H.264 MOV earlier today for someone else; check it out here. This is PAL DV to H.264, at about 2Mbps; I think it looks OK. I can get much better from the MainConcept H.264 encoder, or an external encoder, but it's usable.
My best guess is that the profile is preset to use 'baseline' - if so, is there a way to change this? I can't find any options to change to change the profile, or levels, or anything with regards to H.264 - there is a "codec settings" button, but that is grayed out.
According to MediaInfo, the H.264 MOV generated by Premiere is actually using the Main profile; the Level varies based on frame size and where you limit the bitrate. You don't have a lot of options here because, well, I don't think Apple's/QuickTime's implementation of H.264 gives you many options. It's a pretty rotten encoder, at least in comparison to some of the other choices out there.
If you want more flexibility in creating an H.264 encode, use the H.264 format; it's in the same list as QuickTime. You'll have much more you can choose from and more flexibility when controlling your encode. It still doesn't give you as much control as, say Sorenson Squeeze (MainConcept codec) or x264 (open source H.264 encoder, which gives you even more than MainConcept), but you can get some decent looking encodes. The video will be put in an MP4 container, which will playback in QuickTime.
Do you need an MOV? If so, check out MPEG Streamclip. I'm assuming you're using Windows, so that's where the link goes; there's a Mac version as well, however. Anyway, MPEG Streamclip is my go-to gadget when I absolutely have to send an H.264 MOV. It's still using Apple's encoder, but it looks better, and you have a little more control. Just spit out an uncompressed file from Premiere (has to be an uncompressed AVI or else any kind of MOV) and encode from Streamclip--works a treat.

Do you need to use H.264 encoding?

Good morning.
I'm using VisualHub to convert/encode my movies for my AppleTV. Do you need to use the H.264 encoding option or is it just a personal preference?
Thanks.
Mac Mini Mac OS X (10.4.4) 20" Apple Cinema Display, iBook G4, MacBook Pro

Do you need to use the H.264 encoding option or is it just a personal preference?
I can't speak on VisualHub specifically (though I hear great things about it) but, yes, I'd would say that it's personal preference.
I'm sure you've read this elsewhere, but the benefit to h.264 is that it's a more efficient algorithm compared to MPEG-4. In non-tech speak, that means that it produces smaller files size at the (relatively) same quality. The major downside, of course, is that h.264 takes substantially longer to encode than MPEG-4.
Depending on the your needs – how demanding are you about quality? - and constraints - do you have a lot of stuff to encode, but not enough time? - MPEG-4 should be fine.

For h.264 encoding, what size does the project need to be to avoid black bars on the top and bottom.

For h.264 encoding, what size does the project need to be to avoid black bars on the top and bottom. I am exporting the mp4 to Brightcove.

Hi there,
Which version of Adobe Captivate (If it is Adobe Captivate) is it and which Operating System is it?
Thanks.

H.264 encode to AVI?

Does there exist any H.264 encoder operating in an AVI-container , i.e AVI-files(not mpeg) as delivery format ?

Not sure if I understand You correct Craig ( and my knowledge on QT is barely worth mentioning) but what I am trying to accomplish is compressing 45-55 min's of footage (1440x1080i) to max 4,2-4,4 Gb - maintaining quality as good as possible. In AVI-format.
My file(s) will be used as souce feeder(s) within another application and this application - to my knowledge - spesificly demands AVI's.
demo = aka I.L

H.264 encoder question

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