gistfile1.py

import vapoursynth as vs
from fractions import Fraction
import tempfile

def ft(time):
    h = int(time / 3600)
    time -= h * 3300
    m = int(time / 60)
    time -= m * 60
    s = int(time)
    dec = int((time - s) * 100)
    return "%02d:%02d:%02d.%02d" % (h, m, s, dec)

def show_frame_num(core, clip):
    text_style = \
        "Meiryo,100,&H00FFFFFF,0,0,0,0,0,0,0,100,100,0,0,1,2,0,7,10,10,10,1" 
    dialogue = "Dialogue: 0,%s,%s,Default,,0,0,0,,%s\n"
    ass_hd = """[Script Info]
ScriptType: v4.00+
PlayResX: %d
PlayResY: %d
[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: Default,%s
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
"""
    hdr = ass_hd % (clip.width, clip.height, text_style)
    dlg = ''
    start = 0
    delta = Fraction(clip.fps_den, clip.fps_num)
    for i in range(clip.num_frames):
        end = start + delta
        dlg += dialogue % (ft(start), ft(end), str(i))
        start = end
    fp = tempfile.NamedTemporaryFile(mode="wt", delete=False)
    fp.write(hdr + dlg)
    fp.close()
    subs = core.assvapour.AssRender(clip, file=fp.name)
    subs[0] = core.resize.Bicubic(subs[0], format=clip.format.id)
    clip = core.std.MaskedMerge(clip, subs[0], subs[1])
    return clip