[Tiago Casais]

cheers,

I had the same problem before.
Try converting the expression to keyframes. It worked for me.

[Tiago Casais]

Hello guys,

Craig mentioned the “hinted” metadata on the .mov. I was wondering what that was? Sorenson gives you the option of “hinted” or “not hinted” in the compression settings. Hinted being associated with “streaming” – actually the choice is between “streaming-hinted” and “non streaming -not hinted” Can someone explain to me what that is exacly? In what way will it affect the video?

Another thing i meant to ask: sometimes a compressed video gets pixelated ate scene change and then gets better after a second or two. Im guessing this has to do with the “keyframing at scene change” option. Is that so?

cheers

Tiago

[Tiago Casais]

Indeed i had much better results in the past using h264 than on2vp6. I just didnt know that i could deliver a mov to be integrated in the flash player.

Anyways thank you so much for your detailed explanations, they were very helpful.

cheers to all

Tiago

[Tiago Casais]

Im sorry, he was havind this issues with a VBR compressed file that was used earlier. The CBR compressed file im talking about is the new version that replaced the troubled one. I still havent got any reply on that matter so I cant say for sure if the “VBR to CBR” change was of any good at all. I also cant say anything about the clients connection at this moment, but im sure its not the best one since i never had any troubles viewing the flv at any time.

You say i should use VBR, and im sure that would improve quality, but isnt that the primary suspect for the stop/go problem the client had ?
Im still not sure about the relation between CBR/VBR vS streaming/http progressive(?). Can you give me some hints on when to use one or the other ?
Also, squeeze doesnt allow using h264 for flv delivery. only for .mov. Any other compression software you recommend?
cheers
Tiago

[Tiago Casais]

Its being delivered from a local web server, not the flash server.

800 MB avi uncompressed (original file)

compression: 250 kbps
keyframe every 300 frames
On2VP6 Pro 2 pass CBR

Got an 9MB FLV.

[Tiago Casais]

Guys,
Thank you very much for your replies. I got some good notions from them that helped clear things up.
Still the mystery of the unhappy client remains unrevealed…

It all started because the client reported that , when viewing the video on his website (the 9megabyte sized, 586×320 framesized and 1m:35s long motion graphic presentation, delivered in streaming) it would start, and then stop a couple of times during playback; you know, as if it was waiting for the loading, and then continue until the end (always stopping and going).

My first two ideas were:
1) decrease file size
2)compress it with CBR (since i’d read that if you’re streaming it, you must use cbr).

Yet you say that 9megabytes would present any problems, either in streaming or http video. So file size is not the issue ? Maybe the VBR vs CBR ? Any ideias?

note: i decreased the fps from 25 to 15 (still in AE) and i got a some reduction in file size but i also changed some other aspects so i really couldnt say its a magic potion. I guess compression is a “try, change and re-try” thing.

note 02: What i was trying to say with the noise was that the image gets pretty sloppy with compression. Pixelated. Not captured video noise. Could this be helped with compression filters ?
Sometimes it gets pixelated and then smooth out, to get pixelated again and so on – could this be related to the amount of keyframes we set in when compressing ?

cheers

Tiago

[Tiago Casais]

Hi, and thanks for your answer.

What i meant with the “noise” was if there are particular things you can do ( such as changes in the lights, be carefull with moving backgrounds, dont allow very dark areas, dont use gradients etc etc) so that your video maintains good quality when compressed, thus avoiding pixelation and artifacts in the final compressed version. I cant find any documentation on that.

Should i make the ae render in flv, or avi/mov and then transform to flv in the compressor ?
Why not change the frame rate ? I tried it and the playback seems fine.

note: palwidescreen square changed from 1024 to 1050 in cs4

cheers

[Tiago Casais]

In photoshop indeed, Dave.
Im checking out scopogigio’s demo version for windows right now.
It seems pretty simple and useful.
Thank you very much

[Tiago Casais]

Hello Mark, thanks for the response.
They asked for the logo with background, so the logo goes centered in a colored background, composing the final 720×576 PAL image. That part is settled.
Now you got me wonder about all the colour safe specs.
What’s the best way to ensure the color range is tv safe ? I came to know there is a NTSC video filter in the filters tab, but no PAL. Also, i read about costumizing the “proof setup” to “PAL/SECAM” mode and enabling the proof colors and gamut warning.Are these the right procedures to achieve tv safe color range ? Should i be doing something else?
ps: im also changing the levels’ min and max values
ps: im also changing the levels’ min and max values

[Tiago Casais]

Thanks Walter !
Appreciate the tip.
regards
Tiago