[Libav-user] FFMPEG complex_filter_list taking exponential time in respects to length of video

[Arik]

Thank you, I just added it but it is still rendering at a very slow speed

On Sun, Jul 17, 2022 at 4:22 AM Paul B Mahol <onemda at gmail.com> wrote:

>
>
> On Sun, Jul 17, 2022 at 1:30 AM Arik <aetienne04 at gmail.com> wrote:
>
>> Hi, I have currently been working on a project for 4 months where I am
>> subtitling videos with the DRAWTEXT filter using ffmpeg. The way I am doing
>> this is by using a filter  complex  script (file linked below). So I just
>> chained a bunch of draw text filters together to individually add it to
>> each frame with the proper scaling. The problem I have encountered is that
>> it works fast for relatively short videos but with longer videos the time
>> increases exponentially. a 30 second video can take 15 seconds, but a 5
>> minute video can take over an hour. I was hoping we could solve this
>> together and at least get this time to be 1:1, so if a 30 second video
>> takes 15 seconds, a 5 minute video takes 2 and a half minutes.
>>
>> below is the command I used to start the process
>>
>> -y -i <input> -threads 6 -c:v libx264 -preset ultrafast -r 60 -s
>> 1920x1080 -filter_complex_script <complex_script> <output>
>>
>
> Tried to add new filter 'perms=rw' after fps filter?
>
>
>
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> https://ffmpeg.org/mailman/listinfo/libav-user
>>
>> To unsubscribe, visit link above, or email
>> libav-user-request at ffmpeg.org with subject "unsubscribe".
>>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/libav-user
>
> To unsubscribe, visit link above, or email
> libav-user-request at ffmpeg.org with subject "unsubscribe".
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://ffmpeg.org/pipermail/libav-user/attachments/20220717/458d096b/attachment.htm>