Thumbnail generation - design problem: thumbnails are almost same and not very informative. (1 Viewer)

[regeszter]

How many is the time offset? Can you attache a debug log?

The ffmpeg runs with 100% cpu usage but it runs as lower priority process.

Here is a log from my system (C2D laptop, the movie is on a network share, with gigabit connection):

[2013-07-18 13:20:56,253] [Log ] [MPMain ] [DEBUG] - Thumb refresh from context menu: M:\NAS\Videók\Made.In.Hungaria.2009.720p.mkv
[2013-07-18 13:20:56,263] [Log ] [MPMain ] [DEBUG] - VideoThumbCreator: random value: 56
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: DLL Version : MediaInfoLib - v0.7.61
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: Inspecting media : M:\NAS\Videók\Made.In.Hungaria.2009.720p.mkv
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: Parse speed : 0.3
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: FrameRate : 25
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: Width : 1280
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: Height : 544
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: AspectRatio : widescreen
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: VideoCodec : AVC [ "avc.png" ]
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: Scan type : progressive
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: IsInterlaced : False
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: VideoResolution : 720P
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: VideoDuration : 6556000
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: AudioRate : 48000
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: AudioChannels : 6 [ "5.1.png" ]
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: AudioCodec : DTS [ "dts.png" ]
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: HasAudio : True
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: HasVideo : True
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: HasSubtitles : False
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [INFO ] - MediaInfoWrapper.MediaInfoWrapper: NumSubtitles : 0
[2013-07-18 13:20:56,659] [Log ] [MPMain ] [DEBUG] - M:\NAS\Videók\Made.In.Hungaria.2009.720p.mkv duration is 1800, TimeBetweenFrames is 1
[2013-07-18 13:20:56,660] [Log ] [MPMain ] [DEBUG] - VideoThumbCreator: No thumb in share M:\NAS\Videók\Made.In.Hungaria.2009.720p.jpg - trying to create one with arguments: -loglevel quiet -ss 176 -i "M:\NAS\Videók\Made.In.Hungaria.2009.720p.mkv" -vf select=isnan(prev_selected_t)+gte(t-prev_selected_t\,1),yadif=0:-1:0,scale=600:337,setsar=1:1,tile=1x1 -vframes 1 -vsync 0 -an "M:\NAS\Videók\Made.In.Hungaria.2009.720p_s.jpg"
[2013-07-18 13:20:58,459] [Log ] [MPMain ] [DEBUG] - Refresh success!

It takes 2 seconds. 1x1 thumb, 2 minutes time offset, 720p, 7GB file size.

 

[Sebastiii]

I will try to produce log in the day @HomeY can supply it for sure
about setting : 2x2 and 1 offset

 

[regeszter]

Yes, the 2x2 is slow. I think we have to make a decision regards performance and feature.

A. 1x1 thumb is fast enough to use (2-3 sec).
B. 2x2 is slow (20-30 sec in my system) with % based thumbs.

What can we do?

1. reject everything.
2. keep A and use the original method with B.
3. keep A and use the original method with B but use the time offset (mixed code)

 

[HomeY]

Yes, the 2x2 is slow. I think we have to make a decision regards performance and feature.

A. 1x1 thumb is fast enough to use (2-3 sec).
B. 2x2 is slow (20-30 sec in my system) with % based thumbs.

What can we do?

1. reject everything.
2. keep A and use the original method with B.
3. keep A and use the original method with B but use the time offset (mixed code)

2x2 on my server (running i7-2600k) takes over 2 minutes (sometimes even 3!) for every thumb when i test. about 35% CPU load of 1 ffmpeg proces.
Tested on 7GB sized HD recordings. I'll see if i can get the logs asap

 

[regeszter]

2x2 on my server (running i7-2600k) takes over 2 minutes (sometimes even 3!) for every thumb when i test. about 35% CPU load of 1 ffmpeg proces.
Tested on 7GB sized HD recordings. I'll see if i can get the logs asap

The max running is limited to 2 mins. After 2 minutes, a kill process is running.

The ffmpeg is very slow if there is gap between thumbs.

 

[Jay_UK]

Hi guys,

I would not use ffmpeg to generate the tiled thumbs - I know its "clunky" to tile, but use it to grab the individual frames (called once for each frame/grab) and then tile the frames separately.

I went through this pain with MTN replacement (and when I started to merge the code into MePo - although never progressed it due to personal issues)

J.

 

[regeszter]

I will try this solution for 2x2.

 

[Jay_UK]

Hi there,

If you need any help with this let me know

J.

 

[HomeY]

And here are the logs from the thumbs attempt last night
First thumb has a timestamp of 20:36 and the last 1 was made @ 00:57
that's 4,5 hours for 122 high quality 2x2 thumbs (and that covers all recordings), with a total size of 39,3 MB.

 

[regeszter]

And here are the logs from the thumbs attempt last night
First thumb has a timestamp of 20:36 and the last 1 was made @ 00:57
that's 4,5 hours for 122 high quality 2x2 thumbs (and that covers all recordings), with a total size of 39,3 MB.

As I see lot of process ran longer then 2 minutes and it was killed.