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Diffstat (limited to 'Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst b/Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst index 759420a872d6..e0ee2823ab1f 100644 --- a/Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst +++ b/Documentation/userspace-api/media/v4l/pixfmt-v4l2.rst @@ -44,6 +44,11 @@ Single-planar format structure inside the stream, when fed to a stateful mem2mem decoder, the fields may be zero to rely on the decoder to detect the right values. For more details see :ref:`decoder` and format descriptions. + + For compressed formats on the CAPTURE side of a stateful mem2mem + encoder, the fields must be zero, since the coded size is expected to + be calculated internally by the encoder itself, based on the OUTPUT + side. For more details see :ref:`encoder` and format descriptions. * - __u32 - ``pixelformat`` - The pixel format or type of compression, set by the application. |