24.02.2021, 21:09
OK, I was wrong, there is no DAR data in the file’s header.
When imported file in to Tmpgnenc Authoring Works, clip properties shows Display 4:3, 720x576.
Hybrid in Video properties shows:
· Resolution 720x576
· PAR 1
· Stretch ?
I am not trying to rescue that content. My capture is from VHS tape using Diamond VC500 capture device and following Lordsmurf’s guidance on Digitalfaq.
I was thinking about PAR 12:11 since 720x576 to get in to DAR requires PAR’s 12:11 coefficient: (720x576) * 12/11 = 1.36 that is approx. = 4:3 the display ratio.
I thought there cannot be another PAR value, sine I know the 720x576 and 4:3. PAR should follow that ratio SAR * PAR = DAR ?
If I open file with Hybrid by default Input PAR is set to 1:1.
Using preview the circle in the video has correct shape, but the Input DAR 1:1 definitely is not correct.
But Target Resolution is correct:
· Crop/Resize>Base>Picture Resize>Target Resolution 904x720 is correct, following 720:576 ratio 1.25.
Playing encoded with Hybrid video a circle is squeezed from sides, the actual frame dimensions on PC screen are with 1.25 ratio. Indicates that was used wrong Input PAR 1:1.
(Encoding same file with Authoring Works, resulting file plays on PC with correct DAR, frame dimensions, circle has correct shape. Authoring Works uses 720x576 and Display 4:3. Not asking about PAR.)
Changing Input PAR to 12:11.
· Crop/Resize>Base>Picture Resize>Target Resolution changes to 984x720.
Using preview the circle in the video has correct shape.
Playing encoded video a circle has correct shape, frame dimensions measured on PC screen as ~1.333 ratio.
But Target Resolution 984x720 has slightly different ratio of 1.3666, not the same as 4:3. It is difficult to measure on the screen a circle shape object to understand if it is distorted.
Does it mean that correct PAR is 12:11 and Input PAR has to be manual changed from default 1:1 to 12:11 ?
When imported file in to Tmpgnenc Authoring Works, clip properties shows Display 4:3, 720x576.
Hybrid in Video properties shows:
· Resolution 720x576
· PAR 1
· Stretch ?
I am not trying to rescue that content. My capture is from VHS tape using Diamond VC500 capture device and following Lordsmurf’s guidance on Digitalfaq.
I was thinking about PAR 12:11 since 720x576 to get in to DAR requires PAR’s 12:11 coefficient: (720x576) * 12/11 = 1.36 that is approx. = 4:3 the display ratio.
I thought there cannot be another PAR value, sine I know the 720x576 and 4:3. PAR should follow that ratio SAR * PAR = DAR ?
If I open file with Hybrid by default Input PAR is set to 1:1.
Using preview the circle in the video has correct shape, but the Input DAR 1:1 definitely is not correct.
But Target Resolution is correct:
· Crop/Resize>Base>Picture Resize>Target Resolution 904x720 is correct, following 720:576 ratio 1.25.
Playing encoded with Hybrid video a circle is squeezed from sides, the actual frame dimensions on PC screen are with 1.25 ratio. Indicates that was used wrong Input PAR 1:1.
(Encoding same file with Authoring Works, resulting file plays on PC with correct DAR, frame dimensions, circle has correct shape. Authoring Works uses 720x576 and Display 4:3. Not asking about PAR.)
Changing Input PAR to 12:11.
· Crop/Resize>Base>Picture Resize>Target Resolution changes to 984x720.
Using preview the circle in the video has correct shape.
Playing encoded video a circle has correct shape, frame dimensions measured on PC screen as ~1.333 ratio.
But Target Resolution 984x720 has slightly different ratio of 1.3666, not the same as 4:3. It is difficult to measure on the screen a circle shape object to understand if it is distorted.
Does it mean that correct PAR is 12:11 and Input PAR has to be manual changed from default 1:1 to 12:11 ?