Hum the user could well change her mind about the FPS she wants to work
with…
So what you are essentially advising is a clone of the producer ? Isn't
there a more direct way to do that than going to XML and back ? This is
slow and not proved to be thread safe (cf recent bugs…)
2017-03-14 16:31 GMT+01:00 Dan Dennedy <d...@dennedy.org>:
> Why are you changing frame rate? There is no way to do what you are trying
> to do at this time. After a change to add a no_profile option to the xml
> consumer, you will have to serialize to XML using cock values for time and
> then deserialize.
>
> On Tue, Mar 14, 2017, 3:09 AM alcinos <french.ebook.lo...@gmail.com>
> wrote:
>
>> So I tried the following code:
>> Profile *profile1 = new Profile();
>>
>> profile1->set_frame_rate(10,1);
>> profile1->set_explicit(true);
>>
>> Producer producer(*profile1, "small_movie.mp4");
>>
>> std::cout<<producer.get_playtime()<<std::endl;
>>
>> profile1->set_frame_rate(15,1);
>> std::cout<<producer.get_playtime()<<std::endl;
>>
>> producer.set_profile(*profile1);
>> std::cout<<producer.get_playtime()<<std::endl;
>>
>>
>> I would have expected it to print "10 15 15" or "10 10 15" but instead I
>> get "10 10 10", which tends to confirm what Brian pointed out.
>> So what's the best way to change profile in that case?
>>
>> Thanks in advance
>>
>> 2017-03-13 16:01 GMT+01:00 Brian Matherly <c...@brianmatherly.com>:
>>
>>
>> On 3/13/2017 9:17 AM, alcinos wrote:
>>
>> Thank you for your answer.
>> So if I understand correctly the logic of the code you've linked, if I
>> create my objects (filter, consumers, producers) with a pointer to the same
>> Profile object, then modifing properties of this profile object (fps, …)
>> has the correct side-effects on all the other objects, is that it ? Besides
>> stopping the consumer(s), are there any pitfalls I should be aware of ?
>>
>>
>> I expect that you would have some trouble with producers. Some producers
>> (e.g. avformat) calculate the length when they are first created. If you
>> change the profile to a different frame rate, I'm not sure if the length
>> will be re-calculated. You might need to experiment with that.
>>
>> ~Brian
>>
>>
>>
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