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Diffstat (limited to 'yt_dlp/postprocessor/embedthumbnail.py')
| -rw-r--r-- | yt_dlp/postprocessor/embedthumbnail.py | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/yt_dlp/postprocessor/embedthumbnail.py b/yt_dlp/postprocessor/embedthumbnail.py index 2d4f42a20..b0372225a 100644 --- a/yt_dlp/postprocessor/embedthumbnail.py +++ b/yt_dlp/postprocessor/embedthumbnail.py @@ -77,11 +77,14 @@ class EmbedThumbnailPP(FFmpegPostProcessor): original_thumbnail = thumbnail_filename = info['thumbnails'][-1]['filepath'] - # Convert unsupported thumbnail formats to JPEG (see #25687, #25717) + # Convert unsupported thumbnail formats to PNG (see #25687, #25717) + # Original behavior was to convert to JPG, but since JPG is a lossy + # format, there will be some additional data loss. + # PNG, on the other hand, is lossless. thumbnail_ext = os.path.splitext(thumbnail_filename)[1][1:] if thumbnail_ext not in ('jpg', 'png'): - thumbnail_filename = convertor.convert_thumbnail(thumbnail_filename, 'jpg') - thumbnail_ext = 'jpg' + thumbnail_filename = convertor.convert_thumbnail(thumbnail_filename, 'png') + thumbnail_ext = 'png' mtime = os.stat(encodeFilename(filename)).st_mtime |