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Brian Flint

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About Brian Flint

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    Male
  • Location
    Cambridgeshire UK
  • Interests
    amateur - retired electronics design engineer - broadcast

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  1. It should be noted that 720x480 is 1.5 to 1 , and 640x480 is 1.333 to 1. So converting from one to the other means black bars must appear somewhere if you don't stretch the original image. I have converted some old SD interlaced footage in the PAL format. An some of it was widescreen PAL where the pixels are nowhere square ( can't remember the ratio ) but the result is a 16 by 9 image from SD which has ( in PAL ) 720 x 625. I wanted to put my old footage ( family movies etc ) made on a DV recorder ( PAL) into a non interlaced ( ie progressive ) format which I felt would be more future proof. I tried various things , but in the end I just put the SD footage into an editor and set the output to be 1920x1080 ( progressive ) and kept the frame rate the same. Davinci Resolve will not accept interlaced video , so I used handbrake to do this conversion. This would result in a image which had black bars at the sides. I would then if necessary stretch the image so that it was as original . I would try and find a circular object in the image and make it round . I found that Davici Resolve was useful for this as it allowed the x to y ratio to be fine tuned. I would still have black bars at the sides but at least people did not look fat or thin. I don't know if any of this helps , but that is what I do.
  2. A couple of days ago, I down-loaded the beta version of Topaz Megapixel AI to my PC ( Windows 10 , i7, 16GB ram, GTX650 Ti graphics card with 2GB memory ) It is free for a 30 day trial. I tried some sample clips - process was painfully slow. To render a clip 1080 30p which was 1 minute long was going to take 7.5 hours. I have some clips made 12 years ago of my grandchildren. 640x480 15fps . I have managed to up-scale these to 1920x1080 30fps in Resolve 15 and get improvements The stabilizer seems to reduce jerky effect of 15 fps and produce something which is better to view. I wondered what the Topaz Megapixel AI would do when using it to up-scale from 640x480 to 1920x1080. I tried it on a clip 2 seconds long to reduce render time. It did 'improve' the image quality to some extent. I compared a before and after image of a single frame. I also tried it on some 1920x1080 30fps clips converting them to 4K. I compared before and after a still frame but couldn't see any difference.
  3. I tried to install PotPlayer and it put a virus on my PC . My antivirus software ( McAfee ) fortunately stopped it.
  4. I don't have a GH5, but some time ago, I downloaded some original footage from the GH5. It was 4K h.264 10 bit 422. I don't use premiere or FCP . I do have Davinci Resolve and some other editing software. I tried to edit ( grade ) the downloaded original footage , but nothing would accept it. I can play the original footage with VLC and MPC-HC video players on my windows 10 PC. I used HandBrake to transcode the 4K h.264 10 bit 422 footage to 4K h.264 8 Bit 420. I can now edit the transcoded footage in Davinci Resolve and a number of other video editors. Of course the advantages of 422 and 10 bit have been lost.
  5. I think a lot of people with their new GH5 will have problems trying to edit their 4K ( UHD ) h.264 4:2:2 10bit files. I downloaded the latest version of DaVinci Resolve 12.5.5.026 and it will not recognize this file. My Windows Media ( Windows 10 ) will not play this file, although other video players such as VLC will.
  6. Thanks Neumann films for the original GH5 files. It is interesting to have some h264 files with 4:2:2 and 10bit . I guess this will become much more common in the near future. I also found these were not accepted by Davicii Resolve.
  7. Today I discovered H265 HVEC files will play on Windows media player without any problems , this includes 1920x1080 50p, 3840x2160 25p, 4096x2160 24p ( all original files from the NX1 which I downloaded ) . I have windows 8.1 on my pc. There must have been a windows update in the last day or so for this to happen. I also can play H265 HVEC files which I have converted using Handbrake from various H264 coded video files. Note all of these H265 HVEC video files will also play on the MPC-HC player. ​Good to see support trickling out yet further. What spec PC do you use? My PC is Intel Core i7-3930K Sandy Bridge-E 6-Core 3.2GHz with 16GB ram
  8. Today I discovered H265 HVEC files will play on Windows media player without any problems , this includes 1920x1080 50p, 3840x2160 25p, 4096x2160 24p ( all original files from the NX1 which I downloaded ) . I have windows 8.1 on my pc. There must have been a windows update in the last day or so for this to happen. I also can play H265 HVEC files which I have converted using Handbrake from various H264 coded video files. Note all of these H265 HVEC video files will also play on the MPC-HC player.
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