1000 fps video?

[yetanotherlogin]

Hello

I downloaded an FLV video that VLC says has an 1,000 frame rate.

Is it a known bug?

Thank you.

[Cornucopia]

It's probably VFR and VLC can't calculate it correctly. Show us the MediaInfo info...

Scott

[yetanotherlogin]

Thanks. Here it is:

Format                                   : Flash Video
File size                                : 144 MiB
Duration                                 : 59mn 54s
Overall bit rate                         : 337 Kbps
httphostheader                           : r5---sn-4g57kue6.googlevideo.com

Video
Format                                   : Sorenson Spark
Codec ID                                 : 2
Duration                                 : 59mn 54s
Bit rate                                 : 264 Kbps
Width                                    : 426 pixels
Height                                   : 240 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 fps
Bit depth                                : 8 bits
Bits/(Pixel*Frame)                       : 0.086
Stream size                              : 113 MiB (78%)

Audio
Format                                   : MPEG Audio
Format version                           : Version 2
Format profile                           : Layer 3
Mode                                     : Joint stereo
Mode extension                           : MS Stereo
Codec ID                                 : 2
Codec ID/Hint                            : MP3
Duration                                 : 59mn 54s
Bit rate mode                            : Constant
Bit rate                                 : 64.0 Kbps
Channel(s)                               : 2 channels
Sampling rate                            : 22.05 KHz
Compression mode                         : Lossy
Stream size                              : 27.4 MiB (19%)
Writing library                          : LAME3.98.2

[Cornucopia]

Nope, not VFR...

Scott

[El Heggunte]

Timescale of FLV format is 1 millisecond.
Thus all ntsc videos (xxxx / 1001 fps) are converted to VFR.

source: http://forum.doom9.org/showthread.php?p=1492903#post1492903

[Cornucopia]

Wow, I guess I was on the right track after all.

Scott

[movmasty]

Yes, sometimes FLV from the net are encoded in this way,
there are not really 1000 frames every second, but dummy frames are added, a dummy frame doesnt carry any real vid info, just say to repeat the former frame.

Mediainfo just does not consider these frames, thus showing only the real frames per second.

Dont know why, maybe to make any re-eding more difficult,

Or, if you have two clips one of 25fps, and one of 30, to join them you can losselessy convert both to 150fps with dummy frames and then join.

I would like to know if there is a tool able to strip out the dummy frames restoring the original fps?