thumbnails from video files

[mrxtc89117]

Is there a program to create thumbnails from new recordings or video files? I can probably use ffmpeg or memcoder but I am not knowledgeable enough in batch files to transverse all directories and create thumbnails with the same name and all. Thanks.

[sub]

While watching an existing video in PVRX2.exe (not live tv), you can press Ctrl-T to create a thumbnail. This is ok for anywhere in the first few minutes of a video, but I wouldnt recommend using it for further into the video. This is because it uses ffmpeg which has to decode the file up to that point.

[pBS]

i made a batch available on the forums that will do just that...
it also can make them at any point in the video, 8 hr recordings no problem..
[i used to use 2 instances,1 to seek to proper position,and then 1 to take the snap..] ffmpeg bug..
now it works fine at any point with this cmdline..very fast too.. [about 1 second for snap at 50 mins in]
Sub,what is your ffmpeg line for this?

Code:

ffmpeg  -y -ss 3000 -vframes 1 -i %input%  -f image2 -s 720x480 output.jpg

replace "%input%" with your input file name, and "output.jpg" with your output filename,and 3000 with #seconds into the movie that you want the snap..
works great for me..
[used in showburner plugin util]

[sub]

i made a batch available on the forums that will do just that...
it also can make them at any point in the video, 8 hr recordings no problem..

How long does it take if you take the screenshot from 7 hours into that 8 hr recording? I'm just using ffmpeg in a similar way to you above, but it seemed to want to decode the entire stream up to the point of the screenshot. I maybe missing a command line argument that tells it to skip this?

[sub]

i made a batch available on the forums that will do just that...
it also can make them at any point in the video, 8 hr recordings no problem..
[i used to use 2 instances,1 to seek to proper position,and then 1 to take the snap..] ffmpeg bug..
now it works fine at any point with this cmdline..very fast too.. [about 1 second for snap at 50 mins in]
Sub,what is your ffmpeg line for this?

Code:

ffmpeg  -y -ss 3000 -vframes 1 -i %input%  -f image2 -s 720x480 output.jpg

replace "%input%" with your input file name, and "output.jpg" with your output filename,and 3000 with #seconds into the movie that you want the snap..
works great for me..
[used in showburner plugin util]

Its configurable in config.xml. The defaults are:

Code:

[SIZE=2][COLOR=#0000ff]<[/COLOR][/SIZE][SIZE=2][COLOR=#a31515]CaptureScreenshotCmdLine[/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]>[/COLOR][/SIZE][SIZE=2]-y -i "{SOURCE_FILE}" -s 160x120 -ss {SECONDS} -vframes 1 -f image2 "{DEST_FILE}"[/SIZE][SIZE=2][COLOR=#0000ff]</[/COLOR][/SIZE][SIZE=2][COLOR=#a31515]CaptureScreenshotCmdLine[/COLOR][/SIZE][SIZE=2][COLOR=#0000ff]>
[/COLOR][/SIZE]

Whay are you using two instances exactly?

[pBS]

i don't use 2 anymore, it was a ffmpeg bug that would cause it to seek instead of just goto the snap point, now fixed with the new syntax ffmpeg..
[when they changed to using +,etc in syntax]

i'll see if i can't find a long mpeg to try it on..but i'm pretty sure it's fixed now..
used to be 50 mins in would take a loooong time, now it only takes a second..
[btw i edited sample above to simplify]
i used to pipe one ffmpeg into another, first one would send only a segment to second one which would do the snap, first part not needing to seek to position, as it's outputting mpeg, and second only recieving small mpeg to seek thru, thus shortening the seek..

but all fixed now in your current version of ffmpeg..[what i'm testing with]

now cleaning up cmds and checking on live in progress recording..4gig in, only about 3-4 secs..

[sub]

Strange that your command line is the same as mine, but when I run it from a command prompt it takes a long time.

[pBS]

just did a 13 gig HD movie on a network share, snapped 7000 seconds in [about 2 hrs] in about 3-4 secs total..

[mrxtc89117]

What is the version of ffmpeg that you are using. I have found that certain versions do not take the same commandline options such as -f or -img. Also, the output seems to be always named with a number such as img00001.jpg. I want to name it the same as the video filename so it comes out as a thumbnail image in gbpvr/pvrx2. Thanks

Edit: That commandline works and works really fast. I'm going to use it for now for my downloaded trailers in a batchfile.

startconvert.bat:
call the exe to download the trailers then
for %%i in (*.mov) do call Convert.bat %%~ni

convert.bat:
IF NOT EXIST "%*.jpg" ffmpeg -y -ss 30 -vframes 1 -i "%*.mov" -f image2 -s 100x130 "%*.jpg"

Thanks.

[pBS]

aren't you in PAL land? maybe need some params for that?
i know ffmpeg defaults to ntsc if not told, but it auto-detects PAL really well...
i made sure i'm using the ffmpeg from gbpvr ver 1.0.8..

the only huge one i have is on share, on occasion it takes 22 secs, but never more than that..and usually it's 4 secs..

just did a baseball game i'm watching, 8000 seconds snap took 2 seconds over network..saved back to network..
9 gig file, in progress...