[FFmpeg-user] Not able to creating high-quality jpegs/mjpegs

[Paul B Mahol]

On 9/21/13, Robert Krueger <krueger at lesspain.de> wrote:
> On Fri, Sep 20, 2013 at 11:55 PM, Paul B Mahol <onemda at gmail.com> wrote:
>> On 9/20/13, Robert Krueger <krueger at lesspain.de> wrote:
>>> Hi,
>>>
>>> jpeg/mjpeg compression seems to have a certain limit that I am not
>>> able to exceed and that is significantly lower than that of other
>>> graphics programs.
>>>
>>> To test I took a png image (a still frame exported from a video) in
>>> 1920x1080 and converted it to jpeg like so
>>>
>>> ffmpeg -i test.png -c:v mjpeg -q:v 1 test-ffmpeg.jpg
>>
>> -q:v 0 ?
>
> same result. The files are bit-identical.

-qmin 1 -qmax 1

I forgot this and searched web to learn it again.