On 01/27/2020 05:59 PM, Devin Heitmueller wrote:
On Sun, Jan 26, 2020, 11:07 PM Mark Filipak <
[email protected]> wrote:
Well, whenever I transcode from h262 source to h265 target I invariably
get a reduction of almost 50%. So, why not go with h265? What modern
player doesn't support h265?
Be very careful with this assumption. Almost none of the software players
properly support playback of interlaced HEVC content, especially once you
get into the less common field modes like field repeating.
Devin
Thanks, Devin, I have no plans to produce any interlaced MKVs. They will
all be progressive.
May I expound a little on what I'm up to?
As I stated earlier, I use HandBrake to do transcoding. As part of my
own investigation/reverse engineering, I'm writing "Mark's BD & DVD
Presets Cookbook" and plan to make it available to other HandBrake users,
Rather than by trial-&-error, I contend that source videos can be
characterized in advance, thereby to optimize HandBrake presets. To that
end, I'm using ffprobe to gather info.
So far, I've identified 7 types of source videos.
- BD cinema & some BD extras (but not DVDs).
- "PAL" DVD cinema & extras.
- Vintage "PAL" DVD cinema & extras (4% speed up).
- Vintage PAL TV shows.
- "NTSC" DVD cinema, some BD & DVD extras (soft-telecined).
- Vintage "NTSC" DVD cinema, some BD & DVD extras (hard-telecined).
- Vintage NTSC TV shows.
In addition, there's 3 screen types:
- 24 Hz TV.
- 50 Hz TV.
- 60 Hz TV.
I'm currently perfecting detection methods for each source type, plus
the HandBrake presets that make the most faithful transcodes for each
screen type.
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