MP4 Plays at Quarter Speed and Has No Sound

[colton]

I recently took some video and when I downloaded the files, they play at 1/4 of the original speed and there's no audio track. I was able to take up up to speed with Adobe Premiere, but I've not been able to get sound. I've tested it in Quicktime, Adobe Premiere, and Windows Media Player to no avail.

I've searched for an answer, but either this is unique or I'm asking the wrong questions.

Here's the mediainfo:

File: /Users/****/Desktop/BCP Class/P1010059.MP4
Size: 530.3 MB
Format: QuickTime/MPEG-4/Motion JPEG 2000 format
Stream count: 2
Duration: 00:13:06
Bit rate: 5653 kb/s
Meta info:
    compatible_brands: mp42avc1
    minor_version: 1
    creation_time: 2015-03-14 09:15:22
    major_brand: mp42

Stream 0
Type: video
Codec: h264
Codec profile: High
FourCC: avc1
Duration: 00:13:06
Width: 1280
Height: 720
Sample aspect ratio: 1:1
Display aspect ratio: 16:9
Pixel format: yuv420p
Frame rate: 29.98 fps
Bit rate: 5518 kb/s
Meta info:
    creation_time: 2015-03-14 09:15:22
    language: und

Stream 1
Type: audio
Codec: aac
FourCC: mp4a
Duration: 00:13:06
Bit rate: 127 kb/s
Sample rate: 48000 Hz
Sample format: s16
Channel: 2
Meta info:
    creation_time: 2015-03-14 09:15:22
    language: und

Any help would be greatly appreciated.

[JVRaines]

Can you post a link to a file?

[Baldrick]

Tried several players like vlc media player?
Tried extract the audio with ffmpeg, mp4box or a gui like AoA Audio Extractor Basic?

[colton]

Here's a link. (That's actually the first of five files, but they all have the same problem.)

I just downloaded and tried vlc media player, but not luck. I also tried extracting the audio with AoA Audio Extractor, and while the program successfully created an mp3 file, it was all silence when I listened to it. Do you think ffmpeg or mp4box will produce different results? I'm not too good with command line operations, but I can dig into the documentation if need be.

[hech54]

I recently took some video

.....with a.....????

[JVRaines]

I just downloaded the file. There is an AAC audio track, but it contains only silence. So either nothing was recorded or there was a problem when you copied the files from your device.

[colton]

I just downloaded the file. There is an AAC audio track, but it contains only silence.

So, does that mean the audio file is fine, it’s just silent, i.e., there was a problem with the microphone or some other hardware problem, rather than a file/software problem?

[JVRaines]

Yup, the most straightforward answer is that you didn't record any audio. Try transferring the files again in case there was a hiccup.

[Cornucopia]

This doesn't sound like the same sort of thing, but it might jog someone's memory in its similarity and bring about a solution:

Recently doing edits to a few scores of Lossless files and then running the edited masters (via AVISynth script) through MeGUI for conversion to AVC-in-MP4. Inadvertently mis-scripted a few files where the file was a different FPS (faster or slower) than the script led you to expect. The output would end up much like the OP's: running slow (or, conversely, fast) while the audio wouldn't play or wouldn't play properly. However, in my case, it was clear from MediaInfo that the running times of the V vs. the A tracks didn't match (and they should have) so it was a clear indication of the script mis-representing and mishandling the data. That's what you get for reusing scripts without doing a preflight! My bad, won't happen again. Easy fix: re-encode the audio (from the original) and change the FPS header for the video then remux.

Scott

[colton]

I recently took some video

.....with a.....????

Panasonic Lumix 7

[colton]

Yup, the most straightforward answer is that you didn't record any audio. Try transferring the files again in case there was a hiccup.

That's what I was afraid of. I'll try transferring again tonight.

[hech54]

Did you connect the camera to a computer or did you use a card reader?

[colton]

Did you connect the camera to a computer or did you use a card reader?

I used the SD card port on my laptop.

[hech54]

Did you connect the camera to a computer or did you use a card reader?

I used the SD card port on my laptop.

Strange. Now to me the IS a chance the recordings are corrupted on the camera.
OUCH.