diff --git a/README.md b/README.md
index d1e6915..85a5c8d 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 🇷🇺 Russian README: https://gromlab.ru/vod/create-vod/src/branch/master/README_RU.md
 
-CLI tool to convert videos to DASH and HLS with hardware acceleration (NVENC / Intel QSV / AMD AMF / VAAPI), adaptive streaming, and automatic thumbnails/poster. Formats are always DASH + HLS.
+CLI tool to convert videos to DASH and HLS with hardware acceleration (NVENC / Intel QSV / AMD AMF / VAAPI), adaptive streaming, and automatic thumbnails/poster.
 
 **Features:**
 - ⚡ Hardware acceleration: auto-detect encoder/decoder (NVENC / Intel QSV / AMD AMF / VAAPI / CPU)
@@ -11,18 +11,8 @@ CLI tool to convert videos to DASH and HLS with hardware acceleration (NVENC / I
 - 🖼️ Preview: thumbnail sprite + VTT, poster from the first frame
 - ⏱️ Progress: per-profile and overall CLI progress bars
 
-## Quick Start
-
-```bash
-# Run via npx (no install)
-npx @gromlab/create-vod video.mp4
-
-# Or install globally
-npm install -g @gromlab/create-vod
-create-vod video.mp4
-```
-
-**System requirements:**
+## Install
+For the CLI to work correctly, FFmpeg and MP4Box must be installed in the system.
 ```bash
 # Arch Linux
 sudo pacman -S ffmpeg gpac
@@ -34,12 +24,24 @@ sudo apt install ffmpeg gpac
 brew install ffmpeg gpac
 ```
 
+## Quick Start
+Before running, make sure `FFmpeg` and `MP4Box` are installed (see Install).
+
+```bash
+# Run via npx (no install)
+npx @gromlab/create-vod video.mp4
+
+# Or install globally
+npm install -g @gromlab/create-vod
+create-vod video.mp4
+```
+
 **Output:** A folder `video/` in the current directory with segments under `{profile}-{codec}/`, DASH/HLS manifests in the root, poster, and thumbnail sprite/VTT (both DASH and HLS are always generated).
 
 ## CLI Usage
 
 ```bash
-create-vod <input-video> [output-dir] [-r resolutions] [-c codec] [-p poster-timecode]
+create-vod <input-video> [output-dir] [-r resolutions] [-c codec] [-p poster-timecode] [-e encoder] [-d decoder]
 ```
 
 ### Main arguments
@@ -109,6 +111,6 @@ High FPS (60/90/120) are generated only if the source supports that FPS.
 - Thumbnails: auto sprite (160×90, 1s interval) + VTT
 - Poster: first frame (0:00:00, configurable via `-p`)
 - Parallel encoding: enabled
-- AV1: enabled only if hardware AV1 encoder detected (in auto mode); otherwise остаётся H.264
+- AV1: enabled only if hardware AV1 encoder detected (in auto mode); otherwise stays on H.264
 
 **Requirements:** Node.js ≥18.0.0, FFmpeg, MP4Box (gpac), optional NVIDIA/Intel/AMD GPU for acceleration
diff --git a/docs/QUALITY.md b/docs/QUALITY.md
new file mode 100644
index 0000000..5c32d2b
--- /dev/null
+++ b/docs/QUALITY.md
@@ -0,0 +1,40 @@
+# Регулировка качества и измерение
+
+## Целевое качество
+- Ориентир: средний VMAF ≥ 93 для кодированного видео.
+
+## Что регулируем
+- GPU-энкодеры используют CQ (Constant Quality).
+- CPU-энкодеры используют CRF (Constant Rate Factor).
+- Значения по умолчанию взяты из текущей логики кодирования (см. `src/core/encoding.ts`) и могут быть переопределены через CLI (`--h264-cq`, `--h264-crf`, `--av1-cq`, `--av1-crf`).
+
+## Дефолтные CQ/CRF
+
+| Энкодер          | H.264           | AV1            |
+|------------------|-----------------|----------------|
+| NVENC            | CQ 32           | CQ 42          |
+| QSV              | CQ 32           | CQ 42          |
+| AMF              | CQ 32           | CQ 42          |
+| VAAPI            | CQ 32           | CQ 42          |
+| videotoolbox     | CQ 32           | CQ 42          |
+| v4l2             | CQ 32           | CQ 42          |
+| CPU (libx264 / libsvtav1) | CRF 25→20*    | CRF 40→28*    |
+
+\* CPU значения зависят от целевого разрешения:
+- 360p: H.264 CRF 25, AV1 CRF 40
+- 480p: H.264 CRF 24, AV1 CRF 38
+- 720p: H.264 CRF 23, AV1 CRF 35
+- 1080p: H.264 CRF 22, AV1 CRF 32
+- 1440p: H.264 CRF 21, AV1 CRF 30
+- 2160p: H.264 CRF 20, AV1 CRF 28
+
+## Как мерить качество (VMAF)
+1. Закодируйте тестовый ролик с нужными параметрами (CQ/CRF).
+2. Сравните с исходником по VMAF (разрешения должны совпадать, при необходимости приведите к одному размеру).
+3. Пример команды FFmpeg c libvmaf:
+   ```bash
+   ffmpeg -i encoded.mp4 -i source.mp4 \
+     -lavfi "[0:v]setpts=PTS-STARTPTS[enc];[1:v]setpts=PTS-STARTPTS[ref];[enc][ref]libvmaf=log_path=vmaf.json:log_fmt=json" \
+     -f null -
+   ```
+   В логах ищите `VMAF score`; если < 93 — увеличьте качество (понизьте CQ/CRF), если > 95 и нужен меньший битрейт — можно чуть поднять CQ/CRF.
diff --git a/package.json b/package.json
index 16d3ec1..c0ba7e1 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@gromlab/create-vod",
   "author": "Gromov Sergei",
-  "version": "0.1.8",
+  "version": "0.1.9",
   "description": "DASH/HLS video converter with hardware acceleration (NVENC/QSV/AMF/VAAPI), thumbnails and poster generation",
   "type": "module",
   "main": "./dist/index.js",
diff --git a/src/config/profiles.ts b/src/config/profiles.ts
index 3190df1..84a2dc4 100644
--- a/src/config/profiles.ts
+++ b/src/config/profiles.ts
@@ -87,7 +87,7 @@ export const DEFAULT_PROFILES: VideoProfile[] = [
 
 /**
  * Select appropriate profiles based on input video resolution
- * Only creates profiles that are equal to or smaller than input resolution
+ * Oriented by height: only profiles with height <= source height
  * Always generates 30 FPS profiles by default
  * For high FPS (>30), user must explicitly specify in customProfiles
  */
@@ -101,7 +101,7 @@ export function selectProfiles(
   
   // Standard 30 FPS profiles (always created)
   const baseProfiles = DEFAULT_PROFILES.filter(profile => {
-    return profile.width <= inputWidth && profile.height <= inputHeight;
+    return profile.height <= inputHeight;
   });
   
   // Add standard 30fps profiles with bitrate limit
@@ -206,8 +206,8 @@ export function validateProfile(
   }
   
   // Check if source supports this resolution
-  if (profile.width > sourceWidth || profile.height > sourceHeight) {
-    return { error: `Source resolution (${sourceWidth}x${sourceHeight}) is lower than ${profileStr} (${profile.width}x${profile.height})` };
+  if (profile.height > sourceHeight) {
+    return { error: `Source height (${sourceHeight}px) is lower than requested ${profileStr} height (${profile.height}px)` };
   }
   
   // Check if requested FPS exceeds source FPS
@@ -271,4 +271,3 @@ export function createProfilesFromStrings(
   
   return { profiles, errors, warnings };
 }
-