I am just finishing a playlist player, give it a list of files and it
will play them out at a fixed video size with no glitches or audio
messups.
What i would like to do is add the name of the current playing stream so
that when creating MKV files you can skip to each on as a chapter
--
BR
On 12/20/2020 01:49 PM, Paul B Mahol wrote:
On Sun, Dec 20, 2020 at 12:03 AM Mark Filipak (ffmpeg)
wrote:
For the developers:
At what point are frame numbers assigned?
Libavfilter does not really care about frame numbers much.
It internally just count number of frames that get into filter
> On Dec 20, 2020, at 12:10 PM, pdr0 wrote:
>
> But for web supported video in MP4 container, there is no native alpha
> channel support directly (there are workarounds by using a HTML5 background
> canvas and 2 videos)
>
> And for video - VP9, webm video does have alpha channel support , 8
But for web supported video in MP4 container, there is no native alpha
channel support directly (there are workarounds by using a HTML5 background
canvas and 2 videos)
And for video - VP9, webm video does have alpha channel support , 8 or 10bit
per channel , and is supported by modern browsers,
Does anyone use ffmpeg (the executable, not the library) for large video edits?
I can imagine taking an edit decision list and translating it to a giant filter
graph of trims and concats, but I haven't seen this done. Is that because it's
an awkward tool for the job? Or is there some upper
On Dec 20, 2020, at 11:40 AM, Micael Silva wrote:
>
> I’m not so sure, but I think that no sound MP4 can autoplay. I’ve seen
> situations like these before.
Yeah, a quick, non-exhaustive test on MacOS 10.15.7 gave the following
Safari: Autoplay works, whether sound set to 0 or not
Chrome &
MediaMouth wrote
>
> In this case the "artifact" I was referring to was a piece of the opaque
> image itself that remains on all frames of the GIF even though it does not
> appear in the source PNGs
>
> I posted the ZIP file of the source PNGs and resulting GIF here
>
> On Dec 20, 2020, at 11:37 AM, pdr0 wrote:
>
> https://ffmpeg.org/ffmpeg.html#Complex-filtergraphs
>
> filter_complex "connects" multiple inputs and/or outputs. The names in
> brackets are named input or output "pads". They are similar to variable
> names . eg. [PG] could have been called
On 20 Dec 2020, at 16:32, MediaMouth wrote:
> On Dec 20, 2020, at 11:28 AM, Micael Silva wrote:
>
> 1) Yes
>
> 2) GIF it’s a quite old since limited format. If I remember correctly GIF is
> limited to a maximum of 256 colors in a pallet. You can use some tricks like
> dithering to improve
MediaMouth wrote
>> eg.
>> ffmpeg -r 12 -i toile4-4-%d.png -filter_complex
>> "palettegen[PG],[0:v][PG]paletteuse" toile4.gif
>>
>
>
> Following up on the documentation links provided, I wasn't able to work
> out what the details of your "-filter_complex" entries were about
> On Dec 20, 2020, at 11:28 AM, Micael Silva wrote:
>
> 1) Yes
>
> 2) GIF it’s a quite old since limited format. If I remember correctly GIF is
> limited to a maximum of 256 colors in a pallet. You can use some tricks like
> dithering to improve the quality and smooth the appearance but
On 20 Dec 2020, at 16:18, MediaMouth wrote:
Thanks to the recent FFmpeg notes on creating GIFs.
I was unaware GIFs could handle transparency at all until then.
Couple of additional questions:
1 - Am I understanding this correctly:
A single pixel of a GIF can either be 100% opaque or 100%
Thanks to the recent FFmpeg notes on creating GIFs.
I was unaware GIFs could handle transparency at all until then.
Couple of additional questions:
1 - Am I understanding this correctly:
A single pixel of a GIF can either be 100% opaque or 100% transparent, no
partial transparencies like you
On Dec 20, 2020, at 7:25 AM, pdr0 wrote:
>
> For gif use -vf palettegen and paletteuse to reserve 1 color for
> transparency
>
> https://ffmpeg.org/ffmpeg-filters.html#palettegen-1
> https://ffmpeg.org/ffmpeg-filters.html#paletteuse
>
> You can combine the two by using -filter_complex, instead
Is that the most efficient way to do so? If to be less taxing on the system
there's a few seconds pre-pended to it (ie: 5 seconds would be at 57
seconds), it's fine with me; the video is > 1 hr long, so even 30 seconds
pre-pended isn't an issue.
Since my question was cropped, here it is w/o the
On Sun, Dec 20, 2020 at 12:03 AM Mark Filipak (ffmpeg)
wrote:
> For the developers:
> At what point are frame numbers assigned?
>
Libavfilter does not really care about frame numbers much.
It internally just count number of frames that get into filter and number
of frames that get out filter.
On Sat, 19 Dec 2020, Mark Filipak (ffmpeg) wrote:
For the developers:
At what point are frame numbers assigned?
Can't help there.
I don't know how to put the frame number (as text) into the frames
try google "ffmpeg frame number" - lots of results.
or look at the drawtext filter.
If you want it to start 62 seconds into the source, use -ss 62
Eg ffmpeg -i input.mkv -ss 62 -vcodec copy -acodec copy output.mkv
Adam
> On 19 Dec 2020, at 11:59, DynV Montrealer wrote:
>
> So the ideal beginning is 1:02
___
ffmpeg-user mailing
On Sun, Dec 20, 2020 at 6:02 PM Carl Zwanzig wrote:
> >> Imagemagick is more suited to creating animated gifs
>
> On 12/20/2020 2:24 AM, Paul B Mahol wrote:
> > Untrue.
>
> Why? Without explanation, that assertion is almost meaningless and can be
> ignored.
>
>
> In the first five hits on
Imagemagick is more suited to creating animated gifs
On 12/20/2020 2:24 AM, Paul B Mahol wrote:
Untrue.
Why? Without explanation, that assertion is almost meaningless and can be
ignored.
In the first five hits on "create animated gif with imagemagick"-
FFmpeg-users mailing list wrote
> Hello,
>
> I'm trying to create a GIF from an image sequence of PNGs with transparent
> pixels, but these transparent pixels convert to black in the resulting
> GIF. I'm using the following command :
>
> $ ffmpeg -i toile4-4-%d.png -framerate 12 toile4.webm
Did
On Sun, Dec 20, 2020 at 7:17 AM Tom Sparks wrote:
> On 20/12/2020, vallance via ffmpeg-user wrote:
> > Hello,
> >
> > I'm trying to create a GIF from an image sequence of PNGs with
> transparent
> > pixels, but these transparent pixels convert to black in the resulting
> GIF.
> > I'm using the
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