Dear Forummates,
I have a problem with video and audio synchronization on Youtube. Synchronization is correct on the rendered file, it is also fine on youtube - if it is displayed on the computer. The error appears when displaying on the mobile phone. Then the sound goes ahead or slows down towards the video. I have tried many ways - no result. Help!
Best,
Paul
If YouTube gives proper playback on one device and not on another, very little you can do in Vegas can penetrate the firewall.
Publish your Vegas and MediaInfo properties for both source and render, though, as some may be able to give a few tips.
Thank you for your answer! We work in VEGAS Movie Studio 14 Platinum ver. 12 (but the problem also appeared in ver. 14).
Computer: Procesor Pentium i7 4x2.8, 8 GB RAM, audio card – Alesis IO26, video card - Geforce GT220
Tested mobiles: Samsung Galaxy Core Prime, Huawei P8 Lite, Samsung Galaxy Ace Style, Samsung Galaxy A5 A510F
Mediainfo properties:
General
Complete name : C:\Users\INP_OAP\Desktop\Póki Polska MASTER LEPSZY 4.MP4
Format : MPEG-4
Commercial name : XDCAM EX 35
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42)
File size : 325 MiB
Duration : 2 min 10 s
Overall bit rate mode : Variable
Overall bit rate : 20.9 Mb/s
Encoded date : UTC 2017-07-18 19:06:36
Tagged date : UTC 2017-07-18 19:06:36
Video
ID : 1
Format : MPEG Video
Commercial name : XDCAM EX 35
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : M=3, N=12
Codec ID : 61
Duration : 2 min 10 s
Bit rate mode : Variable
Bit rate : 19.4 Mb/s
Maximum bit rate : 35.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.374
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
GOP, Open/Closed of first frame : Closed
Stream size : 301 MiB (93%)
Language : English
Encoded date : UTC 2017-07-18 19:06:36
Tagged date : UTC 2017-07-18 19:06:36
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Audio
ID : 2
Format : PCM
Format settings, Endianness : Big
Format settings, Sign : Signed
Codec ID : twos
Duration : 2 min 10 s
Bit rate mode : Constant
Bit rate : 1 536 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Bit depth : 16 bits
Stream size : 23.8 MiB (7%)
Language : English
Encoded date : UTC 2017-07-18 19:06:36
Tagged date : UTC 2017-07-18 19:06:36
I assume YouTube, like Vimeo, creates several versions of your video at different resolutions. It is probably streaming a different resolution to your phone than to your pc. So it is probably a problem with YouTube's created file. Have you tried raising it with them?
I think maybe the xdcam footage is a factor.
Try mp4 at around 10 Mbps and see if it makes a difference.
EricLNZ inspired me to check the video also on Vimeo. It turned out that the problem still exists but that it is probably related to Google Chrome on mobile phones! When I use Mozilla Firefox or Safari - everything is fine (Google Chrome on the computer is ok too). On the other hand, I've seen similar video content on the Internet that displayed correctly on both Google Chrome and Mozilla Firefox ...
After today's analysis of audio-video material on many mobile phones, I am sure that the problem only occurs in Google Chrome (the problem is that in Poland is the most common browser), just see: