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November 22, 2016
Answered

Quicktime screen recording w/ soundflower audio routing. Audio video problems Premiere.

  • November 22, 2016
  • 1 reply
  • 1445 views

I was doing a screen recording via quicktime and used soundflower to route the audio from both the built-in output and internal microphone to quicktime. This was all set up on an iMac. I set up an aggregate device to stream both audio inputs into quicktime. Then I used a multi-output device to monitor what I was recording through the macs audio preference panel.

After I saved the video it will playback from quicktime just fine. The problem occurs after I import into premiere. The audio video is not synced up correctly. I checked the fps and it wasn't the same as the original video file. It was set to 55 instead of 34.

Usually, I can google the answer pretty quick, but I started reading forums and post similar to mine and it started sounding like a codec problem. I ended up downloading media inspector to see what was in the video file and wanted some insight at where my problem is and how I can solve this. I'm a noob when it comes to codec problems because I shoot H.264 with a DSLR and have never had any transcoding problems.

Any help or guidance are much appreciated. Let me know if you guys need anymore info.

* * * MediaInspector for Mac - Version 2.6, build 953

* * * ©2012 by Diego Massanti

* * * MediaInfo Lib by Jerome Martinez

* * * Raw File Report for ChrisLukenbill.mp4

General

Complete name                            : /Users/Ruebin/Desktop/ChrisLukenbill.mp4

Format                                   : MPEG-4

Format profile                           : QuickTime

Codec ID                                 : qt 

File size                                : 5.59 GiB

Duration                                 : 12mn 3s

Overall bit rate mode                    : Variable

Overall bit rate                         : 66.3 Mbps

Encoded date                             : UTC 2016-11-14 16:52:18

Tagged date                              : UTC 2016-11-14 16:53:23

Writing library                          : Apple QuickTime

com.apple.quicktime.make                 : Apple

com.apple.quicktime.model                : iMac17,1

com.apple.quicktime.software             : Mac OS X 10.12.1 (16B2657)

com.apple.quicktime.creationdate         : 2016-11-14T09:38:42-0700

Video

ID                                       : 1

Format                                   : AVC

Format/Info                              : Advanced Video Codec

Format profile                           : Main@L5.2

Format settings, CABAC                   : Yes

Format settings, ReFrames                : 2 frames

Codec ID                                 : avc1

Codec ID/Info                            : Advanced Video Coding

Duration                                 : 12mn 3s

Source duration                          : 12mn 5s

Bit rate mode                            : Variable

Bit rate                                 : 65.7 Mbps

Maximum bit rate                         : 768 Kbps

Width                                    : 4 096 pixels

Height                                   : 2 304 pixels

Display aspect ratio                     : 16:9

Frame rate mode                          : Variable

Frame rate                               : 34.509 fps

Original frame rate                      : 25.000 fps

Minimum frame rate                       : 13.761 fps

Maximum frame rate                       : 55.046 fps

Color space                              : YUV

Chroma subsampling                       : 4:2:0

Bit depth                                : 8 bits

Scan type                                : Progressive

Bits/(Pixel*Frame)                       : 0.202

Stream size                              : 5.54 GiB (99%)

Source stream size                       : 5.54 GiB (99%)

Title                                    : Core Media Video

Encoded date                             : UTC 2016-11-14 16:52:18

Tagged date                              : UTC 2016-11-14 16:53:23

Color primaries                          : BT.709

Transfer characteristics                 : BT.709

Matrix coefficients                      : BT.709

Audio

ID                                       : 2

Format                                   : AAC

Format/Info                              : Advanced Audio Codec

Format profile                           : LC

Codec ID                                 : 40

Duration                                 : 12mn 3s

Source duration                          : 12mn 3s

Bit rate mode                            : Constant

Nominal bit rate                         : 640 Kbps

Channel(s)                               : 4 channels

Channel positions                        : Front: L R, Side: L R

Sampling rate                            : 44.1 KHz

Compression mode                         : Lossy

Source stream size                       : 47.4 MiB (1%)

Title                                    : Core Media Audio

Encoded date                             : UTC 2016-11-14 16:52:18

Tagged date                              : UTC 2016-11-14 16:53:23

    This topic has been closed for replies.
    Correct answer cvid01

    You have a variable frame rate which PPro does not like. Use something like https://handbrake.fr/  to convert to a constant frame rate.

    1 reply

    cvid01Correct answer
    Inspiring
    November 23, 2016

    You have a variable frame rate which PPro does not like. Use something like https://handbrake.fr/  to convert to a constant frame rate.