[Paul Sellis]

well… in fact that’s not the problem:
if I export the 1 minute sound, reimport it into FCP7 and then copy/paste it several times on the timeline, I get a perfect result: no pop and no blank on the cuts.

So in my case the problem seems to be on the softwares used to play the file that don’t loop it clean:

-Quicktime 7
– Quicktime 10
– VLC
– iTunes

Strange, no?

[Paul Sellis]

Hi,

same problem here:
I need to create a 1 minute sound in FCP7. Export it and make it loop in Quicktime or another player.
But it pops when looping…

Of course there’s no way to add the two frames cross fade as suggested by Tom as the loop is not made in FCP
So I need to begin and end my 1 minute sound file at “exactly zero crossing points in the waveform”.

How could I manage that?
(I still have FCP7)

Many thanks if you can help me!
😉

Paul

[Paul Sellis]

Hmm… Craig I have 2 more questions…
😉

1°
There’s something that I don’t understand with 3G speed or reliability of the connection:
how can I have an average 3G connection of 4Mb/s (tests results calculated from time needed to download a 20Mo file) and problems reading a 10Mo file with a 700 or even a 500Kps ? There’s something incoherent, no?

(nb: I have downloaded 4Gmark app for iPhone which provides precise tests

2°
Could the High Profile be safely read on all computer?
(only computers, no smartphones nor tablets)

[Paul Sellis]

Thanks for all Craig
😉

[Paul Sellis]

Thanks for your patience Craig

The file you played is a slideshow and isn’t the perfect one to study problems ! But anyway almost every files have a strobe treatment, so…
😉

On my iPhone 4 + WiFi I don’t have problem. So the High Baseline profile is OK. Anyway you advise me to go to Main profile and I’ll go to this more secure way.
There will be quality loss changing to this profile?

You told that with your 3G you get 400kps… It seems desperately low data rate for playing quality video.
What would be your settings to target 3G encodings?

And lastly, I’d like to know what’s your iPhone app to test bandwidth. I got “Speedtest.net” but I am not sure that the results are relevant for 3G…

[Paul Sellis]

Thank you Craig.
You can use this redirection for a while
All the movies have been encoded with my first preset (High profile @ 760kps). Only “Bibi” is an old 500kps file encoded years before with Quicktime or Compressor…
thanks for your discretion as this link has to stay private

[Paul Sellis]

I don’t think that’s a High Profile issue as I tried a Handbrake preset “iPhone & iPod Touch” (I use Version 0.9.8). I think that’s a Baseline profile, no? (Perhaps I just checked also “Web optimized”). With that preset I should get a file compatible with my iPhone 4. But it’s not well played…

The problem should come from something else than a Profile issue.

What do you think?

[Paul Sellis]

Thank you Craig
I went to Handbrake iPhone presets that uses your settings (no CABAC and no B-Frames) and encoded 2 files:
same thing…

So I think now that the problem should come from somewhere else than from Handbrake:

– as you said the reliability of the 3G connection. I tried 500kps as an alternative but even with such data rate there are problems too. Less but problems…
– the JW Player. But I don’t know if the JW Player could be involved as I use it for browsers with Flash but it fallbacks to HTML5 on iPhones. And I think that the HTML5 player is the one included by default in iPhone Safari, so with no JW Player action. Am I right ?
– my mutualized server?… but it’s OK with WiFi
– …

[Paul Sellis]

Thanks a lot for your answers.

1°
So I have used Handbrake to encode with x264 my original 20 minutes ApplePro Res file 1920×1080 25fps
I have used RF15 to get maximum quality and fulfill the 2Go free data transfer offered by WeTransfer
Do you think that the quality should be OK: the result is 14Mbits
(I could use my own server to share larger files)

2°
If not the other solutions could be :

– to increase the RF ?
But is it safe to read all day long on a computer a looping file with high bandwidth? It’s for an exhibit, and I am scare of choppy movie…

– to encode up to 25Mbits and burn a BluRay?

What do you think ?

[Paul Sellis]

No help…
🙁

just to simplify my question:
what codec and compression settings would you use to reencode an Apple ProRes video file sent by internet that would be played on computers from different platforms?