No video footage displayed in Video X Pro

marcusdeman wrote on 3/9/2019, 10:23 AM

I shot a video with my phone s9 in 1920x1080 60fps but no footage is shown in VPX.

When I use VLC I can see the footage.

What could be the culprit?

https://a.uguu.se/2dEsCU4TbCUC_VID_20190309_171552520.mp4

Comments

johnebaker wrote on 3/9/2019, 11:04 AM

@marcusdeman

. . . . phone s9 in 1920x1080 60fps . . . .

We need more information on:

your source video - an analysis of the source video clip using MediaInfo - post the results from the Text view will give us more detail.
your computer specification and VPX version number - see this topic for the details required.

The link to the video does not work ie there is nothing to play .

HTH

John EB

marcusdeman wrote on 3/9/2019, 12:47 PM

Hi John,

1. For source info see below.

2. Using an AMD Phenom 2 computer and using VPX 16.02.317. I have used VPX many times already.

Zy Play is an Android app I have used to record video as I am using their gimbal Zhiyun Smooth 4.

I used the same link to test and downloaded the mp4 file. From there I acquired the source info with media info as stated below.

The video can be viewed with a media player (even with windows media player) but with VPX only a black screen is shown.

Kind regards,

Marcus

------ Source info via mediainfo ------

General
Complete name : Z:\Zyplay Files_downloaded_by_AirDroid\VID_20190309_171552520.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 20.9 MiB
Duration : 8 s 29 ms
Overall bit rate : 21.9 Mb/s
Encoded date : UTC 2019-03-09 16:16:01
Tagged date : UTC 2019-03-09 16:16:01
com.android.version : 9
com.android.video.temporal_layers_count : Unknown kind of value!

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L1
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 8 s 29 ms
Bit rate : 21.8 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 29.642 FPS
Minimum frame rate : 7.526 FPS
Maximum frame rate : 30.060 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.354
Stream size : 20.9 MiB (100%)
Title : VideoHandle
Language : English
Encoded date : UTC 2019-03-09 16:16:01
Tagged date : UTC 2019-03-09 16:16:01
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.601
Matrix coefficients : BT.709
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 7 s 957 ms
Bit rate mode : Constant
Bit rate : 96.0 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 93.9 KiB (0%)
Title : SoundHandle
Language : English
Encoded date : UTC 2019-03-09 16:16:01
Tagged date : UTC 2019-03-09 16:16:01

johnebaker wrote on 3/9/2019, 4:03 PM

@marcusdeman

Thanks for the MediaInfo data - that confirmed what I was suspecting - the video is variable framerate with a wide range as shown in the MediaInfo section:

Frame rate mode : Variable
Frame rate : 29.642 FPS
Minimum frame rate : 7.526 FPS
Maximum frame rate : 30.060 FPS

VPX handles a constant framerate better than variable - you need to run the video clip(s) through a video converter which will convert to a constant frame rate - in your case 29.97 fps.

I and several users in the forum use MovAvi (paid for) however there are free ones such as Any Video Converter, however you will need to check that you can specify a fixed frame rate.

HTH

John EB

marcusdeman wrote on 3/9/2019, 4:26 PM

Hi John,

Thank you for the analysis and your solution.

I used Avidemux and convert the video with a constant FPS. VPX is now able to

show thumbnails of the video though it is still very slow to edit. Even for a small video.

I'll have to resort to another editing program.

Thanks for the help John!

johnebaker wrote on 3/9/2019, 4:42 PM

@marcusdeman

Pleased to hear that the issue is sorted.

. . . . AMD Phenom 2 . . . . though it is still very slow to edit . . .

Without knowing the full specification of the PC, as requested, I would suspect, from the processor it has, that the PC is struggling to run VPX with Full HD video, probably because there is no Hardware Acceleration to help speed up editing, ensure smooth preview playback and faster rendering/exporting.

If the PC is also running Windows 10 and only has 8GB of RAM, then this also does not help.

John EB

marcusdeman wrote on 3/10/2019, 5:42 AM

Hi,

Yes the pc may not be the fastest this day and age for editing but I started encountering this
after taking footage with the Zy Play app. Normally I can just edit 1080p footage without
any issues.

Best regards,

Marcus