Corrupt WR Video. Should be 60 fps raw. OS thinks it's 30 and plays at half speed

Elipsis

Edit history:

Elipsis: 2016-06-22 01:50:16 am

Elipsis: 2016-06-22 01:28:39 am

2016-06-22 01:26:01 am

This is a real interesting one, and of course the first time I ever see it in my life would be when I finally get the time that I've been grinding out for 7 hours. I am quite sure that I can just play it at double speed and make it youtube / leaderboard quality, but I would like to eventually get this submitted to SDA which means repairing the raw. This may be a very very simple matter... as it appears that the 60 fps encode got written as 30 fps in the file metadata. This causes it to play back at exactly half speed with funky sound. I can play it back in media player or something like that at double speed and it seems to be right visually... but the sound is still tinny and messed up from (I assume) not being able to interpret the frame correctly.

If it's just the framerate playback information that is broken, this may be an easy fix if someone could point me in the direction as to how to repair this file. (attempted to attach to thread but it is quite large)

Additional important information: Recorded with Avermedia LGP 720p 60fps. Using .mp4 file format - VLC codec info:

The raw video actually reports in windows as 1:52:28 even though I recorded that particular clip for less than an hour. Probably exactly 56:14 would be the true run time if I had to guess.

Thread title:

This is a real interesting one, and of [i]course[/i] the first time I ever see it in my life would be when I finally get the time that I've been grinding out for 7 hours.  I am quite sure that I can just play it at double speed and make it youtube / leaderboard quality, but I would like to eventually get this submitted to SDA which means repairing the raw.  This may be a very very simple matter... as it appears that the 60 fps encode got written as 30 fps in the file metadata.  This causes it to play back at exactly half speed with funky sound.  I can play it back in media player or something like that at double speed and it seems to be right visually... but the sound is still tinny and messed up from (I assume) not being able to interpret the frame correctly.

If it's just the framerate playback information that is broken, this may be an easy fix if someone could point me in the direction as to how to repair this file.  (attempted to attach to thread but it is quite large)

Additional important information:  Recorded with Avermedia LGP 720p 60fps.  Using .mp4 file format  - VLC codec info: [img]http://i.imgur.com/8sJJnf8.png[/img]

The raw video actually reports in windows as 1:52:28 even though I recorded that particular clip for less than an hour.  Probably exactly 56:14 would be the true run time if I had to guess.

jetfirexx

2016-06-25 01:44:34 pm

Gotta go fast!

This is an interesting question... My first thought is that you want to remux the video. This changes how the video is wrapped i.e. it's encoder and so is a lot faster and a lot higher quality than video conversion.

You'll need three bits of software -
- MVKToolNix - http://www.videohelp.com/software/MKVtoolnix
- XMedia Recode - http://www.videohelp.com/software/XMedia-Recode
- Audacity - http://www.fosshub.com/Audacity.html/audacity-win-2.1.2.exe
- FFmpeg additional libraries for Audacity - http://lame.buanzo.org/#lamewindl

First we need to get your audio file on its own so that we can make it the correct speed using audacity. This is done with XMedia Recode.
Add your video file using the Open File button.
Then you need to select AAC as your format type.
Now under the general tab, change the Mode option from Convert to Copy
Click Add to Queue and Export for your file.

Now open Audacity and import your newly created aac file.
Select the whole track and use the Change Tempo effect
Set the percentage change to 100 and click okay. This will half the length of the audio.
Now go to file Export and select m4a as your file type

Now we actually sort the frame rate for your file in MVKToolNix.
Load it up and under the merge option, select add source files to add in your original video file and the newly created m4a file.
Now unselect the AAC track from the video file
Next, click on the video track and on the right hand box, scroll down to Timecodes and Default Duration and type 0.5 in to stretch by.
Click Start Muxing and after a couple minutes you will have a video with decent audio at the correct frame rate.

Now to change the file format to mp4. This alsouses XMedia Recode.
Load it up, and add the newly create mkv file as before.
This time select mp4 as the file format.
Then on video and audio, change convert to copy.
Now click add to queue and export then a couple minutes later you will have a 60fps mp4 video with good audio

This should be fine so long as the audio file is fine but at half speed. If it doesn't work on the audio then the audio got messed up in the original recording and isn't recoverable

You'll need three bits of software - 
     - MVKToolNix - http://www.videohelp.com/software/MKVtoolnix
     - XMedia Recode - http://www.videohelp.com/software/XMedia-Recode
     - Audacity - http://www.fosshub.com/Audacity.html/audacity-win-2.1.2.exe
     - FFmpeg additional libraries for Audacity - http://lame.buanzo.org/#lamewindl

First we need to get your audio file on its own so that we can make it the correct speed using audacity. This is done with XMedia Recode. 
Add your video file using the Open File button.
Then you need to select AAC as your format type. 
Now under the general tab, change the Mode option from Convert to Copy
Click Add to Queue and Export for your file.

[hidden][img]https://s31.postimg.org/szqrtkm5n/image.png[/img][/hidden]
[hidden][img]https://s32.postimg.org/h92tsrq7p/image.png[/img][/hidden]

Now open Audacity and import your newly created aac file. 
Select the whole track and use the Change Tempo effect
Set the percentage change to 100 and click okay. This will half the length of the audio. 
Now go to file Export and select m4a as your file type

[hidden][img]https://postimg.org/image/hbtyqgipz/f41d7929/[/img][/hidden]

Now we actually sort the frame rate for your file in MVKToolNix. 
Load it up and under the merge option, select add source files to add in your original video file and the newly created m4a file. 
Now unselect the AAC track from the video file
Next, click on the video track and on the right hand box, scroll down to Timecodes and Default Duration and type 0.5 in to stretch by. 
Click Start Muxing and after a couple minutes you will have a video with decent audio at the correct frame rate.

[hidden][img]https://s31.postimg.org/7t0eejgt7/image.png[/img][/hidden]

Now to change the file format to mp4. This alsouses XMedia Recode. 
Load it up, and add the newly create mkv file as before. 
This time select mp4 as the file format. 
Then on video and audio, change convert to copy. 
Now click add to queue and export then a couple minutes later you will have a 60fps mp4 video with good audio

[hidden][img]https://s31.postimg.org/u405qwcmj/image.png[/img][/hidden]
[hidden][img]https://s31.postimg.org/iy9j141q3/image.png[/img][/hidden]
[hidden][img]https://s31.postimg.org/3tcyjzjnv/image.png[/img][/hidden]

This should be fine so long as the audio file is fine but at half speed. If it doesn't work on the audio then the audio got messed up in the original recording and isn't recoverable

Elipsis

2016-07-14 09:37:41 pm

Having issues getting the audio file to not sound ridiculous, even after the audacity tempo change. I'm attaching the original.

Attachment:

02 - Naked Terror.aac

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