Editing Openai/6957d2e8-b738-8008-987a-09a5d9f29bc8 (section)

=== Assistant: Your source is: ===
Your source is:
* Container: MKV
* Video: H.264 High, 1920×1080, 30 fps, yuv420p, BT.709 / TV range
* Audio: Opus, 48 kHz, stereo

So the “best fit” output (same kind of file) is: MKV + H.264 + Opus, keeping 1080p/30fps/pix_fmt and BT.709 metadata.

Because you want exact cuts and “preserve quality”, the most faithful option is lossless H.264 re-encode (x264 -qp 0). That guarantees exact timestamps (ms) and no generation loss (but files can be bigger).

==== ### ====

<syntaxhighlight lang="bash">ffmpeg -i "NEA MADALIN E DRAG QUEEN ACUM [P9gZEDOz9eE].mkv" -filter_complex \
"[0:v]trim=start=62:end=133,setpts=PTS-STARTPTS[v];[0:a]atrim=start=62:end=133,asetpts=PTS-STARTPTS[a]" \
-map "[v]" -map "[a]" \
-c:v libx264 -preset veryslow -qp 0 -pix_fmt yuv420p -profile:v high -level 4.0 \
-color_range tv -colorspace bt709 -color_trc bt709 -color_primaries bt709 \
-c:a libopus -b:a 160k -ar 48000 -ac 2 \
clip_01_0102-0213.mkv

</syntaxhighlight>

===== <syntaxhighlight lang="bash">ffmpeg -i "NEA MADALIN E DRAG QUEEN ACUM [P9gZEDOz9eE].mkv" -filter_complex \ =====
"[0:v]trim=start=197:end=326,setpts=PTS-STARTPTS[v];[0:a]atrim=start=197:end=326,asetpts=PTS-STARTPTS[a]" \
-map "[v]" -map "[a]" \
-c:v libx264 -preset veryslow -qp 0 -pix_fmt yuv420p -profile:v high -level 4.0 \
-color_range tv -colorspace bt709 -color_trc bt709 -color_primaries bt709 \
-c:a libopus -b:a 160k -ar 48000 -ac 2 \
clip_02_0317-0526.mkv

</syntaxhighlight>

===== <syntaxhighlight lang="bash">ffmpeg -i "NEA MADALIN E DRAG QUEEN ACUM [P9gZEDOz9eE].mkv" -filter_complex \ =====
"[0:v]trim=start=561:end=568,setpts=PTS-STARTPTS[v];[0:a]atrim=start=561:end=568,asetpts=PTS-STARTPTS[a]" \
-map "[v]" -map "[a]" \
-c:v libx264 -preset veryslow -qp 0 -pix_fmt yuv420p -profile:v high -level 4.0 \
-color_range tv -colorspace bt709 -color_trc bt709 -color_primaries bt709 \
-c:a libopus -b:a 160k -ar 48000 -ac 2 \
clip_03_0921-0928.mkv

</syntaxhighlight>

===== <syntaxhighlight lang="bash">ffmpeg -i "NEA MADALIN E DRAG QUEEN ACUM [P9gZEDOz9eE].mkv" -filter_complex \ =====
"[0:v]trim=start=584:end=604,setpts=PTS-STARTPTS[v];[0:a]atrim=start=584:end=604,asetpts=PTS-STARTPTS[a]" \
-map "[v]" -map "[a]" \
-c:v libx264 -preset veryslow -qp 0 -pix_fmt yuv420p -profile:v high -level 4.0 \
-color_range tv -colorspace bt709 -color_trc bt709 -color_primaries bt709 \
-c:a libopus -b:a 160k -ar 48000 -ac 2 \
clip_04_0944-1004.mkv

</syntaxhighlight>

===== Just use decimals in the start= / end= values, e.g.: =====
* trim=start=197.237:end=326.041
* atrim=start=197.237:end=326.041

==== Same commands, just replace -qp 0 -preset veryslow with: ====
* Very high quality: -crf 16 -preset slow
* Still excellent: -crf 18 -preset slow

Example swap:

<syntaxhighlight lang="bash">-c:v libx264 -crf 16 -preset slow

</syntaxhighlight>

===== With MKV + Opus (and your file starting at -0.007s), trim/atrim + setpts/asetpts reliably: =====
* cuts exactly (including ms),
* resets each clip to start at t=0 cleanly,
* avoids weird negative start timestamps.

If you want, tell me one clip where you need ms precision (start/end), and I’ll plug those exact values into the command for you.