Show Frame type (I, P, B) in Avisynth

[zerowalk]

Hello friends

I wanted to know if there is any other way to see the frame type (I, B, P) in Avisynth apart from these that I mention below.


-FFinfo()
-DGSource("",Show=true)
-Info() ---(this does not show the frame type . but it does show other things)

is there any other way to visualize in avisynth the frame type of the video ?

Thank you

[jagabo]

AviSynth doesn't know the frame type -- it only receives uncompressed video from the decoder. You need to use a decoder that can write the stats onto the video, like ffdshow.

[zerowalk]

AviSynth doesn't know the frame type -- it only receives uncompressed video from the decoder. You need to use a decoder that can write the stats onto the video, like ffdshow.

Yes, you're right, but how to use it in Avisynth?

[jagabo]

Use DirectShowSource() or AviSource(). Make sure ffdshow is enabled for the codec and has the highest priority.

[KarMa]

This is what it looks like with FFDShow, by enabling OSD settings.

[KarMa]

You can also use Win7DSFilterTweaker to make sure that FFDSHOW is picked to decode the codec you are using, with Directshowsource() in Avisynth.

[Budman1]

If you like Avisynth and just want to see the frame number, timer, and type you can use be code below and just play the AVS file in a media player that supports AVS. (Most do)
I used -atrack -2 because that video has no audio.

FFmpegSource2("C:\Users\Bud\Desktop\trimnmerge\250.mp4", atrack=-2).Crop(0,0,-0,-0)
ScriptClip(Last, """Subtitle("[ "+Chr(FFPICT_TYPE)+" ]", size=(Height*56.0/720), align=2)""", after_frame=true)
#Subtitle("C:\Users\Bud\Desktop\Test Pattern 2.mp4", x=720, y=560, font="Arial", size=24, text_color=$ff0000, align=3)
ShowFrameNumber(scroll=true, x=22, y=200, font="Arial", size=24, text_color=$ff0000)
ShowTime(x=84, y=220, font="Arial", size=24, text_color=$ffff80)
ShowSMPTE(fps=29.97, x=80, y=240, font="Arial", size=24, text_color=$ffff80)

I produces an image each frame such as the below which is a 250 GOP file, 30 FPS file of a timer 0-60.


[Attachment 49749 - Click to enlarge]

If you want a list of frame types and a list of key frames you can use the below CMD file. It is for drag and drop but
by altering line 3 and 4 it can be used as a batch.

setlocal enabledelayedexpansion
@echo off
::for %%a in (*.mp4,*.mpg,*.flv) Do (
for %%a in ("%~nx1") Do (
set /a count=0
cd %%~dpa
echo frame,media_type,stream_index,key_frame,pkt_pts,pkt_pts_time,pkt_dts,pkt_dts_time,best_effort_timestamp,^
best_effort_timestamp_time,pkt_duration,pkt_duration_time,pkt_pos,pkt_size,^
Width,Height,pix_fmt,sample_aspect_ratio,pict_type,coded_picture_number,display_picture_number,^
interlaced_frame,top_field_first,repeat_pict,color_range,color_space,color_primaries,color_transfer,^
chroma_location > "%%~na_ffprobe.csv"
echo No.  pts_time  type > "%%~na_AllFrames.txt"
@echo. > "%%~na_keys.txt"
ver > nul"
set /a Number=0
ffprobe.exe -v quiet -select_streams v:0 -print_format csv -show_entries frame "%%~nxa"  >> "%%~na_ffprobe.csv"
for /F "tokens=4,6,18,19 delims=," %%b in ('findstr "video" "%%~na_ffprobe.csv"') do (
set "x=%%b"
set "y=%%c"
set "z=%%d"
set "w=%%e"
set "v=%%f"
set "u=%%g"
set sort=!y:~0,-7!
::if !sort! GEQ 0 if !sort! LEQ 10 echo !count!  !y:~0,13!  !x! !w:~0,1! >> "%%~na_AllFrames.txt"
echo !count!  !y:~0,13!  !x! !w:~0,1! >> "%%~na_AllFrames.txt"
set "key=!w:~0,1!"
if !key! == I echo !count!  !y:~0,13!  !x! !w:~0,1! >> "%%~na_keys.txt"
set /a count+=1
 set /a ekko=count%%100
 if !ekko! EQU 0 echo Frame !count! processed
)
)
pause

250_All Frames.txt
No. pts_time type
0 0.000000 1 I
1 0.033333 0 B
2 0.066667 0 B
3 0.100000 0 B
4 0.133333 0 P
5 0.166667 0 B
6 0.200000 0 B
7 0.233333 0 B
8 0.266667 0 P
9 0.300000 0 B

250_key frames.txt
0 0.000000 1 I
250 8.333333 1 I
500 16.666667 1 I
750 25.000000 1 I
1000 33.333333 1 I
1250 41.666667 1 I
1500 50.000000 1 I
1750 58.333333 1 I