[FFmpeg-user] libx264 options through FFmpeg

[Tim Nicholson]

On 30/06/11 11:22, Tim Nicholson wrote:
> On 30/06/11 11:08, Tim Nicholson wrote:
>> On 28/06/11 17:51, Thomas Worth wrote:
>>> On Tue, Jun 28, 2011 at 8:31 AM, Tim
>>> Nicholson<tim.nicholson at bbc.co.uk> wrote:
>>>> On 22/06/11 06:43, Thomas Worth wrote:
>>>>>
>>>>> While I've historically used a standalone x264 binary to do encoding
>>>>> by piping yuv420p from FFmpeg, I thought I'd try libx264 through
>>>>> FFmpeg since it's certainly more convenient.
>>>>>
>>>>> [....]
>>>>>
>>>>> If I can safely pass all my options via -x264opts then I'll just use
>>>>> that from now on and disregard FFmpeg's x264 interface.
>>>>
>>>> But what about options that require colon delimited parameters
>>>> themselves
>>>> such as "--sar 1:1"?
>>>
>>> If I use a forward slash (sar=16/9), libx264 doesn't complain but it
>>> also doesn't use the supplied ratio. It seems to default to "1/1"
>>> every time.
>>
>> I have tried sar="1:1" and it hasn't complained about that.

Oh yes it does, but the other errors masked it,,,

>>
>> Howver it doesn't want to accept a profile specification. Using:-
>>
>> ffmpeg -i $in_file -vcodec libx264 -pix_fmt yuv420p -s 1920x1080 -an \
>> -x264opts bitrate=35000:preset=veryslow:tune=$tune:\
>> [...]
>>
>> I get a:-
>> "[libx264 @ 0x12e0960] bad value for 'preset': 'veryslow'"
>>
>> error. replace "veryslow" with whatever you like from the legal list.
>>
>
> Actually its worse than that, it also doesn't accept any of the --tune
> parameters, or seem to handle options that don't have values, e.g --tff

OK so I have fixed the options without parameters.
--tff becomes :tff=1: etc

So I am just left with the reset and tune options not being valid.
-- 
Tim

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