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These are the video tech specs that worked for Instagram's IGTV for me
https://ift.tt/eA8V8J
I've spent days fighting over instagram's IGTV video blogging service, with internet being quite unhelpful by sending me to the official guide that is very vague.
Official guide states:
- Max 650MB
- Max 10 minutes
- MP4 only
- 720@30 minimum resolution
I recorded a mobile letsplay using iOS standard features. I uploaded the resulting video to IGTV - it worked, but with no voiceover. Meaning the iOS screen recorder keeps two separate audio channels within the mp4, and IGTV plays only the first one.
Mkay, I opened Adobe Premiere, merged the audio channels and uploaded the result to IGTV. IGTV accepted the mp4 file but it appeared with the "Failed to post" overlay on my IGTV channel and was unavailable to the viewers.
Figuring out what to do next was tricky. I think, the reason was that I had dragged the iOS-outed mp4 file to the empty timeline so Premiere figured out the matching settings itself. It did, but IGTV was refusing to process these Premiere-exported MP4s.
Solution
iOS outs a variable framerate file, for me it was 59.24fps to 59.56fps. In the sequence settings I set timebase as 59.94fps and spent a bit of time tweaking video and audio track speeds so they matched. I.e. I left my voiceover as 100%, then set game sounds to 99.24% and the video track to 99.53% so they matched.
I used P2 720 60Hz DVCPROHD codec for the previews, despite the sequence was 750x1334px - it worked well.
When exporting I selected h.264 format and used match-source medium bitrate setting - it is good enough for lower resolution videos and also produces less than 650mb files for 10 minute long videos.
It looks like IGTV does not process/recompress the uploaded videos, so it makes sense to keep them smaller anyway.
Also...
I created a new empty Instagram channel and posted exactly same videos to Facebook, YouTube, my proper Instagram channel and the empty Instagram channel to see what these platforms do with the portrait videos, and how do different audiences react.
Given enough interest here, I'll share the findings.
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July 23, 2018 at 02:05PM