!!!! MP4 - I don't hear a clip sound pls help

johnebaker wrote on 7/12/2017, 3:17 AM

Hi

Check this setting in the Program settings, is checked

If that is checked, we need more information

Program full name and version number as found under Help, About . . .

Do other video clips import with sound and can you hear them?

Do you see the audio waveform ? On the timeline, click the video file, right click it and select Audio functions, Video/audio in separate tracks, right click again and select Audio functions, Create wave form.

Use MediaInfo to analyse the video clip causing the problem and post the results from the Text view.

HTH

John EB

niksa.svilicic wrote on 7/13/2017, 4:18 PM

Hi John, yup it was checked ... I don't see wavform.

When I separated video and audio file I don't see waveform...

It is important to say that cli HAS sound, because I can play it withut problem in any video player ...

That is what Mediainfo says:

General
Complete name : C:\Users\Nikša\Desktop\FESTIVAL_ZABAVNE_GLAZBE_SPLIT_2017____8__srpnja_2017_.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 1.56 GiB
Duration : 1 h 59 min
Overall bit rate mode : Variable
Overall bit rate : 1 868 kb/s
Writing application : Lavf56.25.101
IsTruncated : Yes

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3.1
Format settings, CABAC : No
Format settings, RefFrames : 2 frames
Format settings, GOP : M=1, N=50
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 h 59 min
Bit rate : 1 800 kb/s
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.139
Stream size : 1.50 GiB (96%)
Color range : Limited
Color primaries : BT.601 PAL
Transfer characteristics : BT.470 System B, BT.470 System G
Matrix coefficients : BT.601

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AAC / LC
Codec ID : 40
Duration : 1 h 59 min
Bit rate mode : Variable
Bit rate : 64.0 kb/s
Maximum bit rate : 65.3 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 kHz / 22.05 kHz
Frame rate : 21.533 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 54.8 MiB (3%)
Default : Yes
Alternate group : 1

johnebaker wrote on 7/14/2017, 2:29 AM

Hi

What is the source of this video?

Do you have other video clips from the same source, and do they import OK, or is this the only one?

. . . . Bit rate mode : Variable . . . .

If this is a screen capture using Shadow Play then the audio bitrate setting should be set to constant if possible.

Otherwise try running this clip through a video converter, if you have one, which will give a constant bitrate for the audio.

HTH

John EB

niksa.svilicic wrote on 7/14/2017, 2:48 AM

Hi John,

National television sent me 2 clips. None of them has a sound in MEPRO, but in all.other players sound is okay.

Also, all other clips from.other.sources that I import to MEPRO plays perfectly and sound is okay.

Could you, please, be little more precise when you say:

If this is a screen capture using Shadow Play then the audio bitrate setting should be set to constant if possible. Otherwise try running this clip through a video converter, if you have one, which will give a constant bitrate for the audio.

Do you mean that I have to convert video in other format (mpeg for.instance) to get the sound?

Looking forward for your response .Thank you very much for your help and your time.

Regards

Niksa

emmrecs wrote on 7/14/2017, 3:56 AM

In addition to what John wrote, I notice two unusual entries in the MediaInfo data:

Sampling rate : 44.1 kHz / 22.05 kHz
Frame rate : 21.533 FPS (1024 SPF)

First, I suspect that MEP will "expect" 48kHz sampling rate, and the declaration of two rates is not something I have seen before, but also that frame rate seems very strange!

As to "converting" the video, I'm sure John himself will respond but what he is suggesting is that you run your file through a convertor, not to output in a new format but simply to convert the VBR on the audio to CBR. I would also seek to convert the sample rate to 48kHz.

Jeff

niksa.svilicic wrote on 7/14/2017, 2:53 PM

Thank you Emmrecs ... Can I convert video to 48kHz via MEP?

johnebaker wrote on 7/14/2017, 3:09 PM

Hi

. . . . Can I convert video to 48kHz via MEP? . . . .

If MEP cannot handle the audio when you import the video clip, then MEP will not be able to convert it!

I use Movavi Video Converter (paid for) for any video conversions I need to do - mainly MOV files - no Quicktime installed. There are many other good converters available.

HTH

John EB