Splitting/cutting FLV

[optofonic]

Hi! this is my first post so I hope this is the right section

I'm trying to split this file into 15min parts. I've tried everything. On Mac OSX and Windows.

I get a unsupported codec error in ffmpeg (mac osx command line) and avidemux (both platforms). It seems most of the FLV splitter apps do not support AVC.

I'm not sure.. I'm not very savvy when it comes to video codecs.

Does anybody know of a simple way to do this?

BTW, the files only plays well in Adobe media player and VLC.

I've also tried to convert it using various programs without luck..

thank you for your help!

here is the file info:

General / Container Stream #1
Total Video Streams for this File.................1
Total Audio Streams for this File.................1
Video Codecs Used.................................AVC
Audio Codecs Used.................................AAC LC
File Format.......................................Flash Video
Play Time.........................................2h 27mn
Total File Size...................................744 MiB
Total Stream BitRate..............................705 Kbps
Encoded with......................................Ustream. Tv
Video Stream #1
Codec (Human Name)................................AVC
Codec Profile.....................................Baseli ne@L3.0
Frame Width.......................................720 pixels
Frame Height......................................406 pixels
Frame Rate........................................20.013 fps
Total Frames......................................177136
Display Aspect Ratio..............................16:9
Scan Type.........................................Progr essive
Color Space.......................................YUV
Codec Settings (Summary)..........................2 Ref Frames
QF (like Gordian Knot)............................0.100
Codec Settings (CABAC)............................No
Codec Settings (Reference Frames).................2
Video Stream Length...............................2h 27mn 31s 51ms
Video Stream BitRate..............................587 Kbps
Bit Depth.........................................8 bits
Video Stream Size.................................636 MiB (85%)
Color Primaries...................................BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Transfer Characteristics..........................BT.709-5, BT.1361
Matrix Coefficients...............................BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Audio Stream #1
Codec............................................. AAC
Audio Stream Length...............................2h 27mn 31s 51ms
Audio Stream BitRate..............................94.4 Kbps
Number of Audio Channels..........................2
Audio Channel's Positions.........................Front: L R
Sampling Rate.....................................44.1 KHz
Audio Stream Size.................................106 MiB (14%)

[yoda313]

check out flvextract. It should do what you need.

If you simply want to convert to your destination in whole try avstodvd, multiavchd or the versatile format factory. I believe all three can let you choose the range you want to convert out of the original file though I can't say for sure on all of them - they all convert 100% of a file perfectly of course - then you can cut that file.

[budwzr]

SOME USELESS TRIVIA:

The most common codec found in an .FLV is VP6. .FLV was supposed to be just for Adobe "Flash Video". The confusion now is that Google bought ON2, the makers of the VP6 codec (Adobe merely licensed it), so Adobe abandoned the .FLV container (To get out from under Google) in favor of a new .F4V extension. Also has to do with Quicktime auto-launching on MP4's and bypassing Adobe's browser plug-in. A lot of politics going on.

[optofonic]

I just installed flv splitter following the instructions on videohelper

but I don't really know how to use it.

Where do I go from here?

How do I launch it?

I'm sorry if this is a noobie question but I'm not very good with the Windows platform.

[Baldrick]

Tried latest Avidemux?

Flv splitter is not a video editor, it's just a flv decoder to play flv files.

[optofonic]

yes I have. I get a "cannot open input file" type error

[DarrellS]

Avidemux only supports VP6 and FLV1 for copying into an FLV container. It doesn't support copying AVC/AAC into FLV container.

You could use FLVextract to get the intermediate streams and use MKVmerge to mux into MKV and use MKVmerge in Global mode to cut into segments. You can then use ffmpeg to copy those segments into FLV container.

for %%a in ("*.mkv") do ffmpeg -i %%a -vcodec copy -acodec copy %%~na.flv

ffmpeg and the bat file must be in the same folder as the MKV segments to convert to FLV.

I don't know any other way without re-encoding.

[DarrellS]

yes I have. I get a "cannot open input file" type error

Do you have an H264 decoder? Ffdshow has an H264 decoder. So does DivX Plus.

[optofonic]

Thanks! I'll try it ... now I just need to figure out how to install FLVextract

I don't mind converting if it's simpler. I just don't want to lose anymore quality. I want to upload tis vid on youtube and it will be converted once again...

[optofonic]

Thanks! I managed to demux the flv with FLVextract .

Now I have a .264 and an AAC.

now all I need is to mux them into a container that I can edit easily. I tried with MkvMerge, avidemux and ffmpeg without any luck.

Any suggestions?

btw, the h264 video file now plays perfectly in VLC

[optofonic]

after struggling with an out of sync mp4 created with Yamb (I must have spend an hour trying to sync it...) , I gave Freevideocutter a shot. It's not the most precise cutter but I did the job.


I am happy with the results even though I had to re-encode. Quicktime, VLC, avidemux, ffmpeg and others could not even do that simple task properly.

anyhow, thanks for the help!