android
  #1  
Old 01-01-2010, 08:23 PM
Yvan's Avatar
Yvan Yvan is offline
Junior Member
 
Join Date: Dec 2009
Posts: 13
Default Can't play some Mp4's

i have plenty of mp4 files working on my p3, but every now and then i download one that won't play it just says "not supported format (Video Profile main)"
__________________
I dropped my P3 once and while reaching for it screamed "P3!!"
Reply With Quote

Advertisement [Remove Advertisement]

  #2  
Old 01-01-2010, 09:44 PM
Olley Olley is offline
Ultra Senior Member
 
Join Date: Dec 2008
Posts: 4,894
Default

MP4 is a container. What's inside can vary quite a bit. Look at the properties of the ones that don't play and that may explain why they don't.
Reply With Quote

  #3  
Old 01-02-2010, 06:47 AM
Yvan's Avatar
Yvan Yvan is offline
Junior Member
 
Join Date: Dec 2009
Posts: 13
Default

oh okay thanks
__________________
I dropped my P3 once and while reaching for it screamed "P3!!"
Reply With Quote

  #4  
Old 01-02-2010, 08:34 AM
electron's Avatar
electron electron is offline
Senior Member
 
Join Date: Nov 2008
Location: I would like to know too.
Posts: 828
Default

I see this error all the time when I use Handbreak's normal preset instead of the iPod Touch preset... but I don't know what it really means..
__________________
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
check out my P3 group here!
Thanks for making my P3 group the largest non-contest group on ABi!
Reply With Quote

  #5  
Old 01-02-2010, 08:03 PM
meetooman's Avatar
meetooman meetooman is offline
Member
 
Join Date: Oct 2009
Posts: 488
Default

Quote:
Originally Posted by electron View Post
I see this error all the time when I use Handbreak's normal preset instead of the iPod Touch preset... but I don't know what it really means..
H264 specification defines some quality profiles and levels, each one sets some encoding parameters and features (B-frames, CABAC, trellis, etc). There is a great page from Robert Swain explaining it.

With encoding software like ffmpeg you can then use preset parameters corresponding to your player supported levels. Here is the ffmpeg presets list on my present installation:
Quote:
baseline
default
fastfirstpass
hq
ipod320
ipod640
lossless_fast
lossless_max
lossless_medium
lossless_slower
lossless_slow
lossless_ultrafast
main
max
normal
slowfirstpass
For example, my Sony device can only play H264 baseline video files. So I use the ffmpeg command with 2 switchs: ffmpeg *** -vcodec libx264 -vpre default -vpre baseline ***.
Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -5. The time now is 01:08 AM.