MJPEG in Premiere Pro CS6 Has No Audio

[koberulz]

It's importing as though it were a video-only file, with just the filmstrip icon next to it in the project panel.

A Google search turned up nothing but threads from years ago, before Premiere supported the format at all. The video works fine.

It's the result of a capture from a Blackmagic Intensity Shuttle.

MediaInfo:

Format/Info                      : Audio Video Interleave
Format profile                   : OpenDML
File size                        : 49.9 GiB
Duration                         : 1h 9mn
Overall bit rate                 : 103 Mbps

Video
ID                               : 0
Format                           : JPEG
Codec ID                         : MJPG
Duration                         : 1h 9mn
Bit rate                         : 100 Mbps
Width                            : 1 920 pixels
Height                           : 1 080 pixels
Display aspect ratio             : 16:9
Frame rate                       : 25.000 fps
Color space                      : YUV
Chroma subsampling               : 4:2:2
Bit depth                        : 8 bits
Scan type                        : Interlaced
Scan order                       : Top Field First
Compression mode                 : Lossy
Bits/(Pixel*Frame)               : 1.935
Stream size                      : 48.8 GiB (98%)

Audio
ID                               : 1
Format                           : PCM
Format settings, Endianness      : Little
Format settings, Sign            : Signed
Codec ID                         : 00001000-0000-0100-8000-00AA00389B71
Codec ID/Hint                    : Microsoft
Duration                         : 1h 9mn
Bit rate mode                    : Constant
Bit rate                         : 2 304 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 48.0 KHz
Bit depth                        : 24 bits
Stream size                      : 1.12 GiB (2%)
Interleave, duration             : 1000 ms (25.00 video frames)

Any help?

[hech54]

Bit depth : 24 bits
I'd look at that first.

[koberulz]

I don't know what that means.

[hech54]

90% of what I come across is 16bit.
90% of what causes problems for me is something that is not 16bit.

[koberulz]

Okay, but how do I get it to work?

[hech54]

I don't have anything "24bit" here to play with, but I would think that you can just create a new 16bit audio from the present one by dragging the video file into something like GoldWave or Audacity, changing it to 16bit, then outputting a new WAV audio file.
You'll have just audio though.....no video. You'll have to find a way to demux and remux(exchange) the new audio for the old audio. You'll need to create another 49GB file though.

[koberulz]

Surely I could just import the avi file into Premiere for the video, and the new WAV file for the audio? Then just link them in the timeline, so it treats them as one file.

Edit: Trying to import the AVI into Audacity has completely locked up my computer two out of the three times I've tried. Had to hold down the power button for about ten seconds just to get it to even reboot.

[hech54]

Surely I could just import the avi file into Premiere for the video, and the new WAV file for the audio? Then just link them in the timeline, so it treats them as one file.

I don't use premier so I have no idea.

Edit: Trying to import the AVI into Audacity has completely locked up my computer two out of the three times I've tried. Had to hold down the power button for about ten seconds just to get it to even reboot.

I rarely use Audacity. I use GoldWave...but I usually get shouted down AUDACITY IS BETTER by other VHelp members so that is why I include it in my suggestions.

I know there is a way of using VirtualDub to save audio from a file, but I haven't done that for a while either. I stay the HELL away from any audio that is not 16bit......especially my recordings/captures.

[Cornucopia]

You can use Audacity to work on the audio portion of video files, but to do so requires linking up to ffmpeg as a plugin, and that used to require a specific build of Audacity for it to work (and possibly a specific build of ffmpeg).
Also, since this process is not optimized for video, it will take a LONG time to load in the file - to the point where you might think it's frozen.
Better, IMO, to just demux and convert directly with ffmpeg, then load them in separately like you were thinking.

Scott

[koberulz]

Better, IMO, to just demux and convert directly with ffmpeg

I don't know how to do that.

[poisondeathray]

Premiere should accept it as is. 24bit PCM audio is pretty standard for pro audio

If you wanted to convert it to 16bit

ffmpeg -i input.avi -c:v copy -c:a pcm_s16le output.avi

[koberulz]

Using VirtualDub to save as a WAV file results in a 24-bit file that works fine in Premiere. The AVI just shows up as a video-only clip, though.

[koberulz]

Okay, the 24-bit files no longer work in Premiere. I get an error saying it couldn't be imported due to a header error.

Opening in Audacity and then just exporting as a WAV gets me a file I can import, though. And the two processes combined are still faster than opening the AVI in Audacity was, so there's that.