On 8/25/18, LH <[email protected]> wrote: > Hi, I have a Samsung security system which saves video in the .sec format > which no other app can play. The Samsung SmartViewer app has developed > issues and is no longer updated/supported so, as a result, I cannot play > saved .sec files with it, either. So- I can save video but there is no way > to watch it. However, I can convert these .sec files to mp4 with ffmpeg, > using this command: > > ffmpeg -i (name of file).sec (name of final file).mp4 > > It throws errors such as: > > [h264 @ 000000000057fb00] Invalid NAL unit 8, skipping. > [libx264 @ 0000000000516800] frame= 176 QP=25.50 NAL=2 Slice:B Poc:352 I:3 > P:485 SKIP:821 size=1220 bytes > > but it still works well enough that I can watch the video with any app that > plays mp4. However, the video is sped up quite a bit so that it appears to > be in fast motion. I suppose it's the Samsung app that is doing this but > since I can't watch it until I convert it, I don't know for sure. I figured > out that it is about 3.3 times faster. I can convert the video and also slow > it down to normal speed with the command: > > ffmpeg -i (name of file).sec -filter:v "setpts=3.3*PTS" (name of final > file).mp4 > > but the video loses quality and horizontal lines appear in it. > > Is there a better command for converting .sec to .mp4 while correcting the > speed and preserving the quality? I don't have the skills to understand the > ffmpeg documentation and how to choose the best command for my purposes, > it's way over my head, but I can copy commands someone gives me and use > them. > > I realize there won't be a perfect way to do this but I'd like to get the > best results possible. > > I am using ffmpeg-20180824-4d87cd2-win64-static with Windows 7. > > I hope I am posting this correctly and if not please let me know. > > Thank you, LH
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