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  1. I have an f4v video file but it came with an flv file. The flv is 14 meg and the f4v is 76 meg. If I play the f4v I have just video and no audio. I have to play the flv and it somehow connects to the f4v and gives me video AND audio. Never seen this in my limited video conversion experience. How can I convert the thing when its in 2 separate pieces with different extensions?

    Thanks so much!
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  2. Member bat999's Avatar
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    Feb 2008
    United Kingdom
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    It's helpful if you use a program such as MediaInfo to show what those files contain.
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  3. Thanks bat... I used MediaInfo and pasted the info below however not being proficient in video stuff it doesn't mean much to me. All I know is it takes both the files below to play the thing.

    FILE 1
    Complete name : C:\Users\Nancy\Desktop\Velma Graduation-20110529 1803-1\video.f4v
    Format : MPEG-4
    Format profile : Base Media / Version 2
    Codec ID : mp42
    File size : 74.6 MiB
    Duration : 55mn 20s
    Overall bit rate : 188 Kbps
    Encoded date : UTC 2011-05-29 23:38:44
    Tagged date : UTC 2011-05-29 23:38:45

    ID : 1
    Format : AVC
    Format/Info : Advanced Video Codec
    Format profile : Baseline@L1.3
    Format settings, CABAC : No
    Format settings, ReFrames : 3 frames
    Codec ID : avc1
    Codec ID/Info : Advanced Video Coding
    Duration : 55mn 20s
    Bit rate mode : Variable
    Bit rate : 188 Kbps
    Width : 320 pixels
    Height : 192 pixels
    Original height : 180 pixels
    Display aspect ratio : 1.667
    Original display aspect ratio : 16:9
    Frame rate mode : Constant
    Frame rate : 24.000 fps
    Color space : YUV
    Chroma subsampling : 4:2:0
    Bit depth : 8 bits
    Scan type : Progressive
    Bits/(Pixel*Frame) : 0.127
    Stream size : 74.3 MiB (100%)
    Language : English
    Encoded date : UTC 2011-05-29 23:38:44
    Tagged date : UTC 2011-05-29 23:38:45

    FILE 2
    Complete name : C:\Users\Nancy\Desktop\Velma Graduation-20110529 1803-1\voip.flv
    Format : Flash Video
    File size : 13.3 MiB
    Duration : 55mn 21s
    Overall bit rate : 33.7 Kbps

    Format : MPEG Audio
    Format version : Version 2.5
    Format profile : Layer 3
    Codec ID : 2
    Codec ID/Hint : MP3
    Duration : 55mn 21s
    Bit rate mode : Variable
    Channel(s) : 1 channel
    Sampling rate : 11.025 KHz
    Compression mode : Lossy
    Writing library : LAME3.96.1
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  4. I've never seen what you describe, but the durations almost match up but the audio looks 1 sec longer

    What happens if you move the files to different folders ? e.g. play video.f4v in a separate folder, then voip.flv in a different folder ?

    What software are you using for playback? Try something like vlc or mpchc, does it make a difference with your observations ?

    You can try using yamb to multiplex audio & video (join the files into 1 mp4 container) , before converting. You may have to rename the .f4v extension to .mp4 for it to recognize the video . You may have to use flvextract on the flv "video" to demux the mp3 audio before using yamb
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  5. I've never seen it either and I've converted quite a few different video formats. The files won't work unless they are in the same folder. The flv won't play at all if its not with the f4v. the f4v plays audio but no video period. You have to play the entire thing using the flv.

    This came from an online company that does web videos for folks. But they seem to so some proprietary stuff to not allow you to easily copy it.

    Well it is what it is. I appreciated you looking at it though!
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  6. Did you try the other suggestion above? Joining them ?

    If there is some bizarre protection, then demultiplexing them to elementary streams may strip it

    Another option is to use avisynth to join video & audio using audiodub, then frameserve into an encoder. Even if one only plays audio and one only plays video, this should work
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  7. Member Intel Core i7's Avatar
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    Mar 2011
    albany, n.y.
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    Please PM`me using videofelp forum`s feature, and {< me your efforts put out for this topic because I want to
    keep up-to-date with your issue fix results.
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  8. I haven't tried joining yet. I'm trying to keep my cost down for this client to get this thing uploaded to her site. I had her try to download another version of the file from the company. She got an mp4 which was complete.... but the video is a tiny box on the upper right with all the info about it on the left! Unreal. This company is really doing ornery stuff to prevent folks from sharing. Attached is an screen shot of the mp4 as it plays. I think this is just something this one business does.

    Click image for larger version

Name:	Image3.jpg
Views:	188
Size:	156.6 KB
ID:	7251
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  9. I've tried to use avisynth to combine but I'm afraid I'm out of my depth on this. I may have to just let this one go... but bugs me. But I'm just not knowledgeable enough on this stuff.
    I sure appreciate all the input!
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  10. Just realized my Xilisoft lets me combine files. Done it once... still no sound. Going to try tweaking the settings somehow.
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  11. yamb

    they didn't show up as hotlinks above

    these are all free tools by the way
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  12. Well I'm gonna give up the ghost on this one. These things bug me so I pick at them until I figure it out but this is beyond me. I think just because this one company is doing something unique. I'd mainly would have liked to do it just to "show them!" hehe
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  13. do you have a small sample we could look at ?
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  14. You bet. I can link you to the actual file downloads. The first one I was given was a zip file with qutie a few extra pieces in it including the offending flv (audio) and f4v (video) that I tried to join. The video on this is full video but again, can't get sound file to embed.

    The second file was an mp4 file which will stream or you can download by saving the page. If you stream this a bit you can quickly see the video on the top left. So this one is useless for streaming on a site.

    Thanks again!
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  15. What are you tring to do with this? just multiplex into a standard container like mp4 ?

    Both suggestions work here , you'll probably find the yamb , flv extract easier - GUI based and no re-encoding is necessary compared to avisynth (requires re-encoding) . The quality of that video & audio is already very low, so you probably want to avoid re-encoding

    1) use flvextract on the flv, you will get "voip.mp3"

    2) rename extension of video.f4v to video.mp4

    3) use yamb beta 2 , add video.mp4 and voip.mp3, and use a different output name like output.mp4
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  16. Holy crap! It worked! I just needed some dumbded down instructions. :P My client will be thrilled. I'll keep these utilities and instructions... though not sure when I'll come across this situation again. But ti sure feels good to finally correct it. I guess with the right tools you can do just ab out anything.

    Sure appreciate all your help poisondeathray and the others input!
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  17. Member Intel Core i7's Avatar
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    Mar 2011
    albany, n.y.
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    dont support download of copyrighted materials,so better use a reliable source.

    for the y.a.m.b.s/w follow myreview
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