Монтаж и цифровая обработка видео, фото, звука


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Иванов  Денис Владимирович аватар

Как переработать MOV файлы с альфа-каналом в DIF+ALP формат

Для этого способа необходимо установленные на компютере: Студия10/11, QuickTime и Pinnacle Liquid 6 или Avid Liquid 7. Да, да... Liquid . Он является ближайшим родственником Студии 10 и эти родственные связи должены нам помочь на определенном этапе. Ну и, конечно же, необходимо умение проделывать простейшие операции в Liquid. Если с этим нет проблем - приступаем.
Порядок действий такой:
1 - Переводим футаж с альфа-каналом в TGA-последовательность Для этого необходимо переконвертировать наш футаж в TGA 32bit (обязательно) - последовательность кадров и записать их одну папку. Конвертацию можно сделать QuickTime - плеером (только зарегистрированная версия). Открываем файл, выбираем File-Export, создаем пустую папку с таким же названием что и файл, выбираем Export: To Image Sequence, Options..., Format - TGA, Options..., Millions of Colors+ - обязательно! OK, OK, сохранить. ВСЕ.
2 - Открываем Liquid и создаем новый проэкт(например "NEW")
3 - Выбираем Редактирование(Edit)-Панель управления(Control Panel)-Импорт изображения(Image Import) - ставим х напротив Автоматически распознавать анимацию(Automatic detection of Animations) и продолжительность изображения по минимуму = 1 кадру.
4 - импортируем в проэкт нашу TGA-последовательность - Файл(File)-Импорт(Import)-Носители(Media) (не забываем про галочку автообнаружение анимации(Autodetect animations)). Дважды щелкаем на появившемся файле снизу - должен пройти просчет.
5 - После этого заходим Total Commanderом в директорию ..\My Documents\Avid Liquid\Data\Render\NEW хххххх\. Тут есть некоторые индивидуальные особенности, связанные с другими именами дисков и хххххх. Эти хххххх - это набор цифр которые присваивает сам Liquid. Так что включаем логическое мышление и двигаемся дольше. Находим в даной директории файлы с расширением хххххх.DIF(нам нужен самый больший по размеру) и запускаем его. Возможно что при первом запуске появится сообщение что выбраный файл не связан с никакой програмой. Выбираем в списке QuickTime и ставим галачку "использовать для всех файлов даного типа". И так мы нашли и просмотрели наш футаж( теперь уже с расширением DIF). Смотрим на его новое имя - оно будет выглядеть примерно так - 4994e109_0_44.DIF.
6 - Находим в этой же директории еще один файл с таким же именем, но с другим расширением 4994e109_0_44.alp. Именно этот файл содержит информацию об альфа-канале.
7 - Копируем этих близнецов в вновь созданную директорию (например "Лучшее").
8 - Переименовываем эту "сладкую парочку" на что нибудь более вразумительное. Ну например "Колечка и сердечка".
9 - Закрываем Liquid и открываем Студию 10.
10 - Кладём на первую дорожку видео на которое нужно наложить наш футаж. Потом указываем путь к нашей "сладкой парочке" - Колечка и сердечка.DIF и Колечка и сердечка.alp. И что мы видим? А ничего... Пока ничего. Чтобы исправить ситуацию нужно изменить "все поддерживаемые видеофайлы" на "все файлы" и указать на наш DIF-файл(alp-файл подцепится автоматически) и при обнаруженни сцен обязательно прервать процес. И, о чудо, Студия прозрела и увидела наш DIF-файл.
11 - Теперь осталось положить наш футаж на вторую дорожку и наслождатся полученным результатом. Достоинства этого способа : 1 - существенная экономия дискового пространства.
Привожу результаты сравнения одного футажа в различных форматах. Продолжительность футажа - 8 сек.
Размеры для сравнения:
border_romashka.mov(с альфой) - 167 МБ
border_romashka.tga(последовательнось) - 170 МБ
border_romashka.avi(некомпресированное) - 317 МБ border_romashka.DIF+alp(сумарный размер) - 50,6 МБ
ПЛЮСЫ:
Как видно из сравнения - DIF+alp(сумарный размер) втрое !!! меньше аналогичной мовки, с некомпресированным видео разница еще больше - шесть !!! раз
Возможность применения какого либо перехода или фильтра к DIF-футажу.
И самое главное - НИКАКИХ ТОРМОЗОВ при воспроизведении. Наше видео проигрывается легко и непринужденно. У меня при отключенном фоновом просчете и включенном апаратном ускорении, без тормозов проигрываетя на первой дорожке видео с переходеми, на второй DIF-футаж, на третьей - титр с прокруткой и на звуковой дорожке - музыкальная композиция. При этом загрузка процесора не поднимается выше 85 процентов(в среднем-45).Как говорится - "Почувствуйте разницу Господа"
НЕДОСТАТКИ :
Нужно каждый раз при входе в директорию с DIF-футажами устанавливать "все файлы" (Для Ликвида это не касается). Но это не существенно. Ну вот, пожалуй, и все...
УДАЧИ ВАМ!