[FFmpeg-user] Question about rendering and photo dimensions.

Paul B Mahol onemda at gmail.com
Wed Oct 31 16:36:23 EET 2018

On 10/30/18, Hwaen Ch'uqi <hwaenchuqi at gmail.com> wrote:
> Greetings All,
> I am a newbie to ffmpeg and am quite impressed at the program's
> capabilities. For the moment, I am simply combining an audio file with
> a single still image to create an mp4 file. I am using this command:
> ffmpeg -loop 1 -i FILE.jpg -i FILE.mp3 -c:v libx264 -c:a aac -strict
> experimental -b:a 192k -shortest FILE.mp4
> From what I can tell, it appears that picture files with smaller
> dimensions - 2960x2640, for example - render quite easily, whereas
> something like 4910x6054 causes the rendering to slow tremendously,
> even to the point of hanging/crashing my computer! Has this something
> to do with libx264 presets? What can I do to anticipate which picture
> files will have this undesired effect? Are there flags that I can call
> to help with these sizes? Any help would be appreciated!

There is loop video filter, use it.
Your command above will decode input image, over and over again,
with loop video filter image is decoded only once and reused during loop.

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