Participating Frequently

Question

Ingest proxies frequently encode with silent audio track

Forum|Forum|7 years ago
August 20, 2018
8 replies
3162 views

I have an automatic ingest configured to downscale my 4K video content so that I can work with it better in the preview panel. I am always recording in the same settings using OBS, outputting to H264 MPEG-4 at 4K resolution and MPEG AAC Audio (mp4a).

Frequently, the proxies get created with silent audio - that is, the audio track exists in the proxy video file but there is no audio playback in either Premiere Pro or VLC.

I am using the "1024x540 H.264" ingest preset. Premiere Pro has no problem playing back the audio when I turn off using proxies. This must be an encoding issue (with Media Encoder?)

I could really use some help understanding how to fix this because it is extremely frustrating, not knowing that a proxy is broken until I try to use it in the timeline, then having to regenerate it in the hopes that it will fix itself. Sometimes it does, sometimes it doesn't or takes many attempts.

Media Encoder shows no errors in the log:

08/20/2018 11:14:52 AM : Queue Started

- Source File: D:\raw_video\obs\2018-08-19_17-28-04.mp4

- Output File: D:\raw_video\obs\Proxies\2018-08-19_17-28-04_1_Proxy.mp4

- Preset Used: Custom

- Video: 1024x540 (1.0), 59.94 fps, Progressive, Software Encoding, 00:01:27:08

- Audio: AAC, 320 kbps, 44 kHz, Stereo

- Bitrate: VBR, 1 pass, Target 10.00 Mbps, Max 12.00 Mbps

- Encoding Time: 00:01:07

08/20/2018 11:15:59 AM : File Successfully Encoded

08/20/2018 11:16:00 AM : Queue Stopped

Thank you

This topic has been closed for replies.

kaiki83

Participant

I have the same issue so I stopped using proxies.

D

Draf

Participant

Hi There. I run into this issue with shadowplay recorded content constantly. My solution is to export the game audio a wav, import it and link it to the gameplay file. A few extra steps but it works.

Cheers

bugmancxAuthor

Participating Frequently

I've encountered yet another file doing the same behaviour. On this occasion, I removed the file from my project, renamed the source file and re-imported it. Lo and behold, it was processed correctly. This has got to be an issue with Media Cache, or something like that, right?

Next time I will try purging the media cache and then re-importing the file and see what happens.

Joost van der Hoeven

Community Expert

If you feel it is a bug, you can file it here:

Premiere Pro: Hot (2150 ideas) – Adobe video & audio apps

bugmancxAuthor

Participating Frequently

I disagree.

Either the file is valid or it isn't. Either the encoding is broken or it isn't. It doesn't matter what created the file, as long as it's encoding and file integrity are intact.

So far I've no reason to believe that they aren't. This is backed up by other software having no issue decoding the video and audio. This is also backed up by the fact that after creating a replacement project, mysteriously PP was able to play back the audio track and encode it in the proxy. Nothing else changed.

I'm trying to determine why Premiere Pro is encountering difficulty, but there seems to be no way to check the files, logs or anything else that would be useful to help me understand why PREMIERE PRO can't play back the audio when others can.

E

excited_Genie16B8

Legend

Either the file is valid or it isn't.

It doesn't work that way. Various software has various compatibility with various media files. The capabilities of one program with one media file won't have any affect on the capabilities of another with the same file.

Your best option for using a professional level NLE is professional level media. Use a hardware recorder.

W

wcn_dave

Inspiring

I have to say I find this kind of response to be really out of order. You're suggesting people have to spend tens of thousands on hardware, in order to be able to use decent editing software, because of a bug in that software..!?

I have just taken footage using:

Canon GX10, £2.3k

Mounted on Manfrotto, with a field monitor etc - all coming to about 3k

Zoom H4N field recorder, plugged in to 2 line outs from a pro mixing desk, and using the onboard mics on tripid, £600

DJI Osmo Pocket action cam - £400

This gives me 2 video tracks and 5 audio tracks, which I will need to sync up on a timeline, and then I can start to mix and cut.

I use proxies, as it's 4k footage, and I use the audio sync feature on the timeline.

Except... 1 in 5 clips has no audio in the proxy.

The original plays fine in PP and in VLC

The proxy has NO audio, in both.

And your actual serious solution, for a hobby filmer, who does this for free, using £8k of equipment, is to "get some decent equipment".... that's not helpful, not appropriate, not supportive, not even correct.

bugmancxAuthor

Participating Frequently

I'm recording in-game audio which makes a hardware recorder much more difficult. The thing is, there's nothing wrong with the source files because VLC can read them. The question is why would Adobe struggle where VLC does not?

E

excited_Genie16B8

Legend

What other software can do with a file isn't really relevant. Your best option is a hardware recorder.

E

excited_Genie16B8

Legend

I think your best course of action is to improve your source footage.

Instead of a software recorder, use a hardware recorder. Something like the Atomos Ninja or the HyperDeck Studio Mini from Blackmagic. These devices record in a format suitable for editing, software recorders typically do not.

Joost van der Hoeven

Community Expert

Are the proxies silent in Pr or also when you play them in VLC, or an other video player?

bugmancxAuthor

Participating Frequently

Proxies are silent in VLC and Premiere Pro despite showing as having an audio track. Premiere Pro shows the audio track but no waveform when using the proxy. Reverting to the original shows the waveform and plays the audio. The originals play back fine in both Premiere Pro and VLC.

bugmancxAuthor

Participating Frequently

Re-re-rechecking this, and for whatever reason, Premiere Pro is not playing the audio on these originals now despite showing a waveform and the files playing back perfectly in VLC.

So to re-state the current problem, I am recording different clips with exactly the same settings each time using OBS. VLC has no trouble decoding and playing these clips.

Importing into PP the raw footage audio waveform shows up but does not play. Proxies also do not play. This only happens for certain files and seems to happen repeatedly for that file again and again.

So either something is wrong with my raw footage or something is wrong with the decoder under certain circumstances, but that baffles me because I would have thought that being able to work with video footage would be one of the strengths of APP, not a weakness (again, VLC has no problem decoding/playing this back at all.)

This is a very frustrating issue for me beause every time I go to edit, I'm being set back whenever I encounter this problem, wasting countless hours. I can't edit properly without being able to hear the audio and have no way of knowing it's going to happen until trying to edit with that clip.

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