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dfaker / WebmGenerator

UI and Automation to cut, filter and join high quality webms, mp4s or gifs.
Mozilla Public License 2.0
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Text like drawtext is stretched when dealing with stretched 4:3 to 16:9 videos #38

Closed LolicoreExpress closed 3 years ago

LolicoreExpress commented 3 years ago

So I'm not super well versed in everything video format and all that, but basically I have these videos that are 1440x1080 but are being displayed as 16:9 (as they should), the only thing is that when using drawtext, the text will also get stretched as you can see. Capture d’écran 2021-10-11 192527 Hopefully it's possible to have the text remain consistent even when dealing with that kind of format / resolution 😊

dfaker commented 3 years ago

I suspect the DAR and or SAR are non-square, could you let me know the output of the command:

ffmpeg -i "videofilepath\videoName.mp4"

There should be a line in the output like: Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 638x360 [SAR 1:1 DAR 319:180], 371 kb/s, 29.97 fps...

So I can find a similarly squashed file to test with?

LolicoreExpress commented 3 years ago

Of course, here's what I get.

Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      handler_name    : Sound Media Handler
      vendor_id       : [0][0][0][0]
  Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1440x1080 [SAR 4:3 DAR 16:9], 3687 kb/s, 29.97 fps, 29.97 tbr, 60k tbn (default)
    Metadata:
      handler_name    : Video Media Handler
      vendor_id       : [0][0][0][0]
      encoder         : AVC Coding
  Stream #0:2(eng): Data: bin_data (tx3g / 0x67337874)
dfaker commented 3 years ago

Seems like drawText always operates on square pixels no matter what the SAR, I've added a new Make pixel SAR 1/1 filter in https://github.com/dfaker/WebmGenerator/commit/5d54f735cbf19802c9dadecb52a38bd5040e3ec9 you can use early by pasting those lines at the top of your src/filterSpecs.json (after the opening square bracket) or wait for it to be bundled in the next release.

LolicoreExpress commented 3 years ago

That's perfect. Thank you as always. 😄