Re: [FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Jason Green
Yes sorry, I was looking too much into colorspace and didn't realise that it was during the overlay that the colour change was happening. Thanks. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To

Re: [FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Paul B Mahol
On 10/9/19, Jason Green wrote: > I feel like I'm so close with your help, but the docs around some of these > commands is not great and I just can't figure it out. > Could you please post an example of how you use these options in this > context. I made the image public so you can literally amend

Re: [FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Jason Green
Actually I managed to get it working by specifying format=gbrp in the overlay filter. ffmpeg -i " https://asset-info-examples.s3-eu-west-1.amazonaws.com/white-text-bg.jpg; -i "https://asset-info-examples.s3-eu-west-1.amazonaws.com/white-text.png; -filter_complex

Re: [FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Jason Green
I feel like I'm so close with your help, but the docs around some of these commands is not great and I just can't figure it out. Could you please post an example of how you use these options in this context. I made the image public so you can literally amend the command I posted originally and try

Re: [FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Paul B Mahol
On 10/9/19, Jason Green wrote: > Ok so I get that png doesn't have a colourspace, so do I need to specify a > colorspace for the input? Plus I need to specify the output I am guessing. > I have tried outputting with various colorspace and color_range values but > I'm having no luck. Do I need to

Re: [FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Jason Green
Ok so I get that png doesn't have a colourspace, so do I need to specify a colorspace for the input? Plus I need to specify the output I am guessing. I have tried outputting with various colorspace and color_range values but I'm having no luck. Do I need to just keep experimenting with these

Re: [FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Paul B Mahol
On 10/9/19, Jason Green wrote: > I'm sorry to bother you all with this but I have been unable to resolve the > issue with my own research (which is really rare for me :) ). > > I am trying to overlay pngs of text that have been generated by another > source onto jpg photos. I have simplified the

[FFmpeg-user] White is not pure white in overlay of PNG on JPEG image

2019-10-09 Thread Jason Green
I'm sorry to bother you all with this but I have been unable to resolve the issue with my own research (which is really rare for me :) ). I am trying to overlay pngs of text that have been generated by another source onto jpg photos. I have simplified the command down to it's simplest example and