ファイル変換ブログ

H.265 vs MP4: When Do You Need H.264?

Convertr Editorial Team · 公開日 April 8, 2026 · 更新済み September 8, 2026

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Identify HEVC inside MP4, decide whether remuxing is enough, and compare measured H.264 quality and file-size tradeoffs before checking playback.

続きを読む H.265 vs MP4: When Do You Need H.264?

How to Convert MP4 to MP3 and Check the Extracted Audio

Convertr Editorial Team · 公開日 March 23, 2026 · 更新済み August 8, 2026

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Extract the audio track from an MP4, choose an appropriate MP3 bitrate, and avoid silent, clipped, or mislabeled results.

続きを読む How to Convert MP4 to MP3 and Check the Extracted Audio

HEIC to JPG: Convert iPhone Photos and Keep the Right Copy

Convertr Editorial Team · 公開日 March 23, 2026 · 更新済み August 8, 2026

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Convert an iPhone HEIC photo for apps that require JPG, while avoiding common mistakes with quality, metadata, orientation, and originals.

続きを読む HEIC to JPG: Convert iPhone Photos and Keep the Right Copy

MP3, FLAC, WAV, or AAC: Which Audio Format Should You Use?

Convertr Editorial Team · 公開日 March 23, 2026 · 更新済み August 8, 2026

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Choose an audio format by the job it must do: editing, archiving, streaming, podcast delivery, or everyday playback.

続きを読む MP3, FLAC, WAV, or AAC: Which Audio Format Should You Use?

Document Conversion: Choose PDF, DOCX, or TXT by What Must Survive

Convertr Editorial Team · 公開日 September 14, 2025 · 更新済み August 8, 2026

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A decision guide for document conversion: preserve layout, recover editable structure, extract plain text, and verify the result.

続きを読む Document Conversion: Choose PDF, DOCX, or TXT by What Must Survive

PDF to Word: What Converts Cleanly and What Needs Repair

Convertr Editorial Team · 公開日 September 14, 2025 · 更新済み August 8, 2026

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Turn a PDF into an editable Word document with realistic expectations for text PDFs, scans, tables, columns, fonts, and forms.

続きを読む PDF to Word: What Converts Cleanly and What Needs Repair

MP4 Codecs Explained: Compatibility, Quality, and File Size

Convertr Editorial Team · 公開日 September 13, 2025 · 更新済み August 8, 2026

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MP4 is a container, not a video codec. Learn how H.264, H.265, AV1, audio, resolution, and bitrate affect playback and conversion.

続きを読む MP4 Codecs Explained: Compatibility, Quality, and File Size

EPUB to PDF: When Fixed Pages Help and What Gets Lost

Convertr Editorial Team · 公開日 September 10, 2025 · 更新済み August 8, 2026

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Convert EPUB to PDF for printing or fixed-page workflows, with checks for fonts, images, links, chapters, margins, and reflow.

続きを読む EPUB to PDF: When Fixed Pages Help and What Gets Lost

SVG to PNG: Choose the Pixel Size Before You Rasterize

Convertr Editorial Team · 公開日 August 10, 2025 · 更新済み August 8, 2026

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Render an SVG to a sharp PNG by choosing output dimensions, checking fonts and external assets, and understanding transparency and scaling.

続きを読む SVG to PNG: Choose the Pixel Size Before You Rasterize

MP4 vs MOV: The Container Does Not Decide Video Quality

Convertr Editorial Team · 公開日 August 5, 2025 · 更新済み August 8, 2026

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Compare MP4 and MOV by codec support, editing workflow, metadata, compatibility, and whether remuxing can avoid re-encoding.

続きを読む MP4 vs MOV: The Container Does Not Decide Video Quality