https://bugs.kde.org/show_bug.cgi?id=421565
Julius Künzel <jk.kde...@smartlab.uber.space> changed:
What |Removed |Added
----------------------------------------------------------------------------
Version|20.08.2 |5.98.0
Assignee|j...@kdenlive.org |fa...@kde.org
Severity|grave |critical
CC| |kdelibs-b...@kde.org
Product|kdenlive |frameworks-karchive
Component|User Interface |general
--- Comment #20 from Julius Künzel <jk.kde...@smartlab.uber.space> ---
This was initially reported to Kdenlive, but I made some tests and I am pretty
sure this is a KArchive bug.
If you pack a large *.mp4 file into a KTar Archive, the archive will be broken.
As far as I can see, large means bigger than about 8GB. Smaller files do not
lead to broken archives.
I tried to archive the same files with Ark and everything worked fine, the
archive is not corrupted.
Here is some code that reproduces it:
```
std::unique_ptr<KArchive> archive;
archive = std::make_unique<KTar>(QStringLiteral("/path/to/archive.tar.gz"),
QStringLiteral("application/x-gzip"));
archive->open(QIODevice::WriteOnly);
QString sourceFile = QStringLiteral("/path/to/EightDotSixGB.mp4");
QString destinationFile = QStringLiteral("EightSixGB.mp4");
bool success = archive->addLocalFile(sourceFile, destinationFile);
// sucess is true, but archive broken
archive->close();
```
Broken means Ark show a warning when opening the archive. It is possible to
open in read only mode, but if you extract the *.mp4 only part of it can be
played.
Extracting the archive with KArchive does not work. It fails on opening:
```
QString archiveName = QStringLiteral("/path/to/archive.tar.gz");
KArchive *archive = new KTar(archiveName);
if (!archive->isOpen()) {
if (!archive->open(QIODevice::ReadOnly)) {
qDebug() << archive->errorString();
// we always end up here with archive->errorString()
// "Could not read tar header"
return;
}
}
QDir dir(archiveName.remove(QStringLiteral(".tar.gz")) +
QDir::separator());
if (!dir.mkpath(QStringLiteral("."))) {
return;
}
archive->directory()->copyTo(archiveName + QDir::separator());
archive->close();
```
KZip does also not work in a similar way. I don't know if it is the same cause
or not. If you try to read a *.zip archive with the above code,
archive->errorString() is "Invalid ZIP file. Unrecognized header at offset
643690023" which seems somehow related to BUG: 450597
KF Version: 5.98
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