Repairing FLV files by remuxing them with freeware FLV Extract and mp4box

[greenbook]

libavcodec? I am terribly sorry - I really don't know how to determine what video codec is used in my flv files. I'm not that technically advanced. I don't know if it's something prefigured in my Zoom Player, which is my default player for playing flv files. How can I find this out?

When I put the flv file into FLV Extract, and it does its thing, it gives me a AVI video file and a mp3 audio file. I should also report that the FLV Extract screen gives me this warning message:

"Suggested cropping: 2 pixels from right, 0 pixels brom bottom."

Don't know if this is something I should be worried about.

What's also interesting is that if I play the silent AVI files in one of my media players, they play slowly...almost like they're in slow motion, but they aren't really in slow motion.

Originally Posted by greenbook

I really don't know how to determine what video codec is used in my flv files. I'm not that technically advanced. How can I find this out?

In VLC go to "Tools" -> "Codec information" (or just press Ctrl+J) and let me know what video codec and what video resolution is used.

Originally Posted by greenbook

"Suggested cropping: 2 pixels from right, 0 pixels from bottom."

Don't know if this is something I should be worried about.

This can be a problem. I need to know the video resolution.

[noob2001204]

It's easier if you just use the FLV fixer from GetFLV.
The program is not free,but you can just use its FLV fixer without any limitation

[greenbook]

The video codec is VP6F and the resolution is 852x480.

The audio codec, BTW, is mp3.

Originally Posted by greenbook

The video codec is VP6F and the resolution is 852x480.

It is usually a good idea to have width and height divisible by 16 or at least by 8. So I think this can be a problem. I suggest you to ask the developer of yamb whether he can fix this problem.

[greenbook]

I sent an email to the developer of yamb, and he/she has never replied back to me.

I also bought GetFLV and used the FLV Fixer on my files, but it does nothing. The playback is just as poor. Very slow and occasionally choppy.

This is really aggravating because I just put a brand new 512MB NVIDEA video card into my PC last week, and I am still having these problems.

[blimey]

The flv fixer in GetFLV is just the same as (is actually lifted from) the freeware FLVMDI. So, it has all the same limitations as FLVMDI. It is mostly helpful for setting duration data, but it won't necessarily always start at 0:00.

The fix tool in Jaksta is actually quite powerful, although I wish it had a few more options: like the ability to set the start hex value of the first time stamp, or the ability to do a range of timestamps without manual selection. But, it is very good for setting duration data and setting the timing interval values.

Some other tools to try are FLVTool2, and RichFLV. RichFLV requires adobe air, and often crashes while reading a file. But when it does work it does a good job.

[nanobots]

Wish I had this info a long time ago, Mp4box is awesome the created .mp4 is lossless from my .flv and its in a format I can properly work with, no more needless reencodes just to get a file I can work with.

I rip a lot of videos from Fox/Hulu and while the content plays fine in the .flv containers when I extract them and get my .264 and .aac files nothing would properly decode the video.

Excellent post, works great!

[cloudflv]

I extracted the .264 and .aac files and remuxed it into MP4. my question is how can I remux this file into an AVI with AviDemux? I get this error when opening the MP4 in AviDemux.

H.264 Detected

If the file is using B-frames as reference it can lead to a crash or stuttering.
Avidemux can use another mode which is safe but YOU WILL LOSE FRAME ACCURACY.
Do you want to use that mode?

[cloudflv]

^ forget about that. I like MPEG4 better.

I also want to know how do I remux AVI (VP6F) video and MP3 audio files into an MP4 container? MP4Box didn't work like it did with the h264 and AAC streams. Is there something that can convert AVI to MP4 without re-encoding because I can join the video and audio files in VDubMod.