[Q] video frame grabbing software

[jhpark]

Hello,

I am looking for a software which does the following:

input files : avi, m2ts. mpg etc video files
output files: jpg or bmp image files of the ALL frames in the input video

I have tried several softwares but they could not generate ALL frames in a single run.
I would prefer free softwares but any link for commercial software is appreciated.

Regards,

John

[manono]

Virtual Dub

Open the video file, preferably in an AviSynth script. Then File->Export->Image Sequence. Give it a name, a format, and a destination.

[jhpark]

Virtual Dub

Open the video file, preferably in an AviSynth script. Then File->Export->Image Sequence. Give it a name, a format, and a destination.

Thanks for your GREAT tip.

Regards,

John Park

[poisondeathray]

It can directly with the ffinputdriver plugin for vdub , or the directshow plugin
http://code.google.com/p/ffinputdriver/
http://forums.virtualdub.org/index.php?act=ST&f=7&t=15093


But manono suggested opening with an .avs script with avisynth
e.g.
DirectShowSource("video.m2ts")



The screenshots taken by Vdub will be converted to RGB with ITU Rec601 . But for HD material, you usually want to use Rec709 (the colors will be slightly shifted otherwise)

e.g.
DirectShowSource("video.m2ts")
ConvertToRGB(matrix="rec709")


If you don't care , just use one of the vdub plugins

[jhpark]

Thank poisondeathray,

Works great, but my bmp file for m2ts video input looks shifted by 1 or 2 pixels.
Image quality is not good.

[poisondeathray]

What do you mean shifted? Can you post a screenshot ?

Which method did you use ?

Is m2ts interlaced ?

[jhpark]

I am not sure whether it is interlaced or not. How can I find it ?
I find poor quality in image capture.
Attached is my image.

[jhpark]

Here are captured images for the same frame using other programs.(pot player & gom player)

[poisondeathray]

It's because vdub takes 1:1 lossless screenshot when in bmp (just converted from YUV to RGB)

You have an interlaced file, with 4:3 PAR , 16:9 DAR. It gets deinterlaced and "stretched" back to 1920x1080 upon playback.

You would need to deinterlace, and resize to 1920x1080 with the filters in vdub

Different methods of deinterlacing will give you different types of quality, different methods of resizing will give you different types of quality . It's no longer "lossless" once you apply tranformations or filters

[jhpark]

Thanks, I think I found solution of deinterlacing.

[poisondeathray]

Yes you can do it right within vdub

video=>filters=>deinterlace
video=>filters=>resize


Or another option is to do it within the avs script. With avisynth you have access to higher quality deinterlacing like QTGMC (but much slower processing)