daniel/yt_de_study
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Daniel Tsvetkov 2020-09-06 20:56:06 +02:00
parent 6643959596
commit fc4af8cc9c
2 changed files with 12 additions and 2 deletions
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12
README.md
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@ -16,7 +16,7 @@
3. Times and tries best to arrange the timestamps of the two subtitle files to match
4. Stops and lets the user fix (see `fix.txt` below)
5. If the `fix.txt` file exists, it assumes times have been fixed
6. Cuts the scenes defined in `fix.txt` and then combines them in `'EN'+'DE'+'EN'` form
6. Cuts the scenes defined in `fix.txt` and then combines them in `'EN'+'DE'+'EN'` form and puts subtitle text in the middle of the screen
7. Concatenates the final video with title of variable `FINAL_TITLE` and clears up temp files
### `fix.txt`
@ -61,3 +61,13 @@ Title in scene 2 is in two lines in English
Title in scene 2 in German is in one line
```
## TODO:
* The cmd interface could be better - perhaps provide a first argument the name of the video and then store the metadata in `data/video_title/data.py` or similar (see the current `data/strange_stars` for inspiration).
- This could provide caches e.g. for `fix.txt` and other intermediate files
* **HUGE assumption** here is that the videos are of the roughly same length, quality and resolution - there have been no tests for boundary conditions too outside of these assumptions
- E.g. videos are assumed to be `.mp4` when downloading with worst quality - this may fail because mp4 is hardcoded in the commands (even though ffmpeg will probably be able to merge different formats, it will fail on different resolution/quality)
* Linear sync is uuuuugly (and thus by default not used at all right now). It's trying to find the matching frame linearly searching from -5 to +5 seconds with a constant step on `de_video` from a 0th point of the `en_video`. The idea is to syncronize the frames which should maybe provide a bettwr guide to subtitle aligment. Much better would a variant of binary search algo with varying step alternating on left/right side or a gradient descent-like.
- Further, generating images, saving them, comparing the save and saving on disk is very naive and also slow - maybe come up with a faster method to compare frames overall
* Concatenating of DE+EN+DE and then putting over subtitles (step 6. above) is currently two ffmpeg commands while it could be one
- Further, both steps 6. and 7. could be optimized/combined with some advanced ffmpeg-magic

2
main.py
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@ -4,7 +4,7 @@ import textwrap
from common import run_os_cmd
from compare import linear_compare
# TODO: AMMEND THESE FOR NOW - should become cmdline params
# TODO: AMMEND THESE FOR NOW - should become cmdline params / text file
FINAL_TITLE = "strange_stars"
DE_VIDEO = "https://www.youtube.com/watch?v=-1FvAEaE0fc"
EN_VIDEO = "https://www.youtube.com/watch?v=p_8yK2kmxoo"