25.07.2022, 18:44
So I tried MPlayer and FFPlay and they do not honor the color transfer hint at all, everything gets displayed with the same (to my eye, SMPTE 170M/BT.709) curve.
Here are some sources that suggest gamma 2.8 is used by PAL:
- https://www.tvtechnology.com/opinions/gamma-correction
- https://docs.kdenlive.org/en/glossary/us..._hell.html
- https://en.wikipedia.org/wiki/Gamma_correction
Quote from the first link (https://www.tvtechnology.com/opinions/gamma-correction):
"Gamma (γ) has a value of 2.8 (PAL and SECAM) or 2.2 (NTSC)."
This contradicts the forum post from https://forum.doom9.org/showthread.php?s...ost1681479:
"BT.601 Transfer curve is identical between BT.470 B/G (PAL), BT.470 M (NTSC), SMPTE 170M (NTSC), BT.709"
Indeed, all four of these transfer curves use a gamma of approx. 2.2. But then the first article is incorrect by suggesting PAL uses gamma 2.8?
Here are some sources that suggest gamma 2.8 is used by PAL:
- https://www.tvtechnology.com/opinions/gamma-correction
- https://docs.kdenlive.org/en/glossary/us..._hell.html
- https://en.wikipedia.org/wiki/Gamma_correction
Quote from the first link (https://www.tvtechnology.com/opinions/gamma-correction):
"Gamma (γ) has a value of 2.8 (PAL and SECAM) or 2.2 (NTSC)."
This contradicts the forum post from https://forum.doom9.org/showthread.php?s...ost1681479:
"BT.601 Transfer curve is identical between BT.470 B/G (PAL), BT.470 M (NTSC), SMPTE 170M (NTSC), BT.709"
Indeed, all four of these transfer curves use a gamma of approx. 2.2. But then the first article is incorrect by suggesting PAL uses gamma 2.8?