[MEncoder-users] Encoded file doesn't sync with iPhone [SOLVED]

[Grozdan]

On Wed, Mar 17, 2010 at 3:38 AM, Alexander Strange
<astrange at ithinksw.com> wrote:
>
> On Mar 16, 2010, at 1:02 PM, Grozdan wrote:
>
>> On Tue, Mar 16, 2010 at 5:57 PM, Kasper Bonne <kbonne at gmail.com> wrote:
>>> 2010/3/16 Jörgen Isaksson <jogga at me.com>:
>>>> I'm not sure of anything regarding this. I'm just saying that it's finally
>>>> syncing with the iPhone. I will have to dig deeper into all those options
>>>> now that I have something to work with. It seems like the last two
>>>> parameters did the trick?
>>>>
>>>> But thx for all the help and friendly replies from all list members.
>>>
>>> Thanks for sharing this information. I have been wanting to encode for
>>> the iPhone myself.
>>>
>>> If you fine tune the options, e.g., to yield a better quality, please
>>> don't hesitate to post it. I for one would find it very useful.
>>
>> You want better quality? How about this? :)
>>
>> frameref=1:nomixed_refs:bframes=0:b_adapt=0:b_pyramid=none:noweight_b:weightp=0:direct_pred=none:aq_mode=1:me=umh:subq=8:mbtree:psy_rd=0.8,0.0:chroma_me:trellis=0:nocabac:deblock:no8x8dct:partitions=p8x8,i4x4:nofast_pskip:dct_decimate:level_idc=30:threads=auto::vbv_maxrate=1500:vbv_bufsize=1000
>
> These options reduce quality unless you meant them for level constraints:
> ref=1
> vbv_maxrate
> vbv_bufsize
>
> These are default or redundantt:
> b_adapt=0
> b_pyramid=none
> noweight_b
> direct_pred=none
> aq_mode=1
> mbtree
> chroma_me
> deblock
> dct_decimate
> threads=auto
>
> And these just make no sense:
> nomixed_refs
> subq=8 (could be 10)
> psy_rd=.8 (could be the default)
> trellis=0 (could be 2)
> partitions (could be =all)
> nofast_pskip
>

The reason I add them is because I have to keep track of about ~60
presets in my script, so it's easier for me to just look at them and
compare with other presets. Besides, adding those "redundant" options
won't hurt anything at all but will make it easier for me to keep
track.

Also, as I previously said, trellis does NOT work in baseline as
baseline does not allow CABAC, which trellis depends on, so setting it
to 1 or 2 will give you impression that it's enabled while internally
x264 disables it when CABAC is off. Further, adding partitions=all to
baseline will make you believe that all partition types will be used
while in reality they won't as baseline does no allow 8x8dct which the
i8x8 partition depends on. So in reality when using partitions=all in
baseline, only p4x4, p8x8 and i4x4 will be used (no i8x8). Deleting
"redundant" options won't magically improve anything. And yes, the vbv
is for level constrains.

> You can just delete all of those and it'll probably improve. mencoder might allow preset=slower:profile=baseline in an x264 options string now, haven't tried it.
>
>
>>
>>>
>>> Best
>>> /Kasper
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>>>
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