[Libav-user] This command take 2 minutes to render. Can it be quicker?

[Vijay Kanta]

On 05/28/2014 06:15 PM, Steve Boyer wrote:
> On Wed, May 28, 2014 at 3:34 AM, Vijay Kanta <viju.kantah at gmail.com 
> <mailto:viju.kantah at gmail.com>> wrote:
>
>     On 05/28/2014 05:17 AM, Carl Eugen Hoyos wrote:
>
>         Vijay Kanta <viju.kantah at ...> writes:
>
>             Can it be quicker and less resource
>             hungry by altering the following command?
>
>             :~$ /usr/local/bin/ffmpeg -i /link/to/music.mp3
>             -i /link/to/video.mp4 -vcodec libx264 -crf 23
>             -vf subtitles=/link/to/subtitles.srt -strict -2
>             /link/to/muxed.mp4
>
>         This is missing console output but at least
>         -preset ultrafast (and friends) come to
>         mind.
>
>
> This command will (if I understand correctly) transcode your audio. 
> Using "-c:a copy" will copy the audio.mp3 into the muxed.mp4 
> container. Same thing with "-c:v copy" as the video.mp4 is (obviously) 
> already in an MP4 container, it should be a trivial matter to mux the 
> two streams into a single MP4.
>
>         Carl Eugen
>
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>
>     Sorry, what do you mean by missing console output? This command
>     does output to the shell.
>
>
> It would help us even more if you could provide what your console 
> outputs when the command runs.
>
>     Regards,
>     ~Vijay.
>
> Steve
>
>
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Hey, it doesn't work or I couldn't do it properly. Here's the command 
and output.

FFMPEG-COMMAND: /usr/local/bin/ffmpeg -i music/qT0pdDhKxFDnfJHq2.mp3 
-c:a copy -i video/HKp1ZpHbANT4dmGRC.mp4 -vcodec libx264 -crf 23 -vf 
subtitles=subtitles/1718379803.srt -preset ultrafast -strict -2 
film/HKp1ZpHbANT4dmGRC.mp4
ffmpeg version 2.1.1 Copyright (c) 2000-2013 the FFmpeg developers
   built on Dec 15 2013 14:17:24 with gcc 4.4.5 (Ubuntu/Linaro 
4.4.4-14ubuntu5)
   configuration: --enable-libass --enable-shared --enable-libx264 
--enable-gpl
   libavutil      52. 48.101 / 52. 48.101
   libavcodec     55. 39.101 / 55. 39.101
   libavformat    55. 19.104 / 55. 19.104
   libavdevice    55.  5.100 / 55.  5.100
   libavfilter     3. 90.100 /  3. 90.100
   libswscale      2.  5.101 /  2.  5.101
   libswresample   0. 17.104 /  0. 17.104
   libpostproc    52.  3.100 / 52.  3.100
Input #0, mp3, from 'music/qT0pdDhKxFDnfJHq2.mp3':
   Metadata:
     title           : Legendary
     artist          : Oval
     album           : Ringtone EP
     track           : 1
   Duration: 00:00:50.86, start: 0.000000, bitrate: 128 kb/s
     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Unknown decoder 'copy'



Regards,
~Vijay.

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