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• Convert Videos with FFMPEG to PowerPoint 2016 compatible video format [closed]

  11 septembre 2020, par Sebastian S.

  I am trying to convert a bunch of videos to a video format that is natively supported by PowerPoint 2013/2016 on a Windows 7 system.

  


  Microsoft recommends on their website mp4 with h264 and aac.

  


  Video and audio file formats supported in PowerPoint

  


  


  In PowerPoint 2013 and later, and in PowerPoint 2016 for Mac, for the best video playback experience, we recommend that you use .mp4 files encoded with H.264 video (a.k.a. MPEG-4 AVC) and AAC audio. In PowerPoint 2010, we recommend that you use .wmv files.

  


  


  


  We recommend using .m4a files encoded with AAC audio. In PowerPoint 2010, we recommend that you use .wav or .wma files.

  


  


  Audio is not important for me.
I tried to convert my videos with ffmpeg using the following options :

  


  ffmpeg -i Input.avi -c:v libx264 -preset slow -crf 22 -c:a copy Output.mp4


  


  However I cannot import the video to PowerPoint 2016 (32 or 64bit, I tried both). I always get a missing codec error.

  


  PPT Error when including video files

  


  Has anyone successfully encoded videos to a natively supported PowerPoint video format (on Windows) ?

  


• macos - Batch create 'samples' with multiple cuts from videos [closed]

  17 février, par Thiago

  I'm on macOS, and have ffmpeg and python installed through homebrew. Bash solutions are also welcome - though I have no experience with bash

  


  I have folders with many videos, most (if not all) in either mp4 or mkv. I want to generate quick samples for each video, and each sample should have multiples slices/cuts from the original video.

  


  I don't care if the resulting encode, resolution and bitrate are the same as the original, or if it's fixed for example : mp4 at 720. Whatever is easier to write on the script or faster do execute.

  


  Example result : folder has 10 videos of different duration. Script will result in 10 videos titled "ORIGINALTITLE-sample.EXT". Each sample will be 2 minutes long, and it'll be made of 24 cuts - 5 seconds long each - from the original video.

  


  The cuts should be approximately well distributed during the video, but doesn't need to be precise.

  


  Edit

  


  someone on Reddit suggested the script below, but the result has some issues, like images blinking in and out (see it here https://youtu.be/FZC3aIvugpI). Maybe it's related to errors like this I saw ? [hevc @ 0x11c631a30] Could not find ref with POC -43

  


  I was also not able to change the 1-second duration of each clip for something longer, and would still need to make this loop on every video in the folder.

  


  #!/bin/bash
f="original.mp4"
dur=$(ffprobe -v 16 -show_entries format=duration -of csv=p=0 "$f")
cnt=$(echo "scale=0; ${dur} * 0.95 / 8" | bc -l)
echo $dur $cnt

ffmpeg -i "$f" -c copy -f segment -segment_time $cnt -reset_timestamps 1 "/tmp/out_%03d.${f##*.}" -y -hide_banner

echo "#list">/tmp/1.txt
for g in /tmp/out_*; do
    echo "file $g" >> /tmp/1.txt
    echo "outpoint 1" >> /tmp/1.txt
done

o="/tmp/out.${f##*.}"
ffmpeg -f concat -safe 0 -i /tmp/1.txt -c copy "$o" -y -v error -stats test.mp4


  


• How can I make windows "like" the mp4 files I create in Linux and sync with Rsync

  17 juillet 2019, par Geoff Fox

  I am a meteorologist on TV remotely from a studio I built. My control room uses a TriCaster, an amazing studio-in-a-box which runs on a Windows 7 variant. I make my weather maps myself on a Centos 7 machine — around 40,000/day.

  I don’t entirely understand the problem, but here’s a quote from someone helping me at NewTek (the TriCaster company)

  Rsync is built on a *nix based environment where all the file permissions and attributes are based on the Linux environment. There is no meaning for this in NTFS and Windows. The result is you get files that will most likely have the read-only flag set or no flag at all. Other attributes will be delivered as null. I’m sure from your own programming experience, programs don’t like null values and they generally have to be accounted for very specifically.

  And so the finely tuned TriCaster stumbles, meaning lost frames or other problems caused by my short weather animations.

  Here are some samples of the Rsync code I use

  rsync -r -t -s -v --no-p --chmod=ugo=rwX /var/www/html/output/loops/mp4/conus*.mp4 /mnt/tricaster/Clips/Import
rsync -r -t -s -v --no-p --chmod=ugo=rwX /var/www/html/output/loops/mp4/nebraska*.mp4 /mnt/tricaster/Clips/Import
rsync -r -t -s -v --no-p --chmod=ugo=rwX /var/www/html/output/loops/mp4/northernplains*.mp4 /mnt/tricaster/Clips/Import

  These are mp4 files. They are only used locally. I really don’t care what flags are checked and permissions filled as long as Windows 7 doesn’t care.

  At this point I always like to tell folks, though I do write some code my last computer class was in high school,’67-68 semester. Thanks in advance for your help.