The code would have segfaulted before if it where null

Fixes CID732218
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID732183
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

If maxval is more than 255 than each value takes 2 bytes with most
significant byte first.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes CID90582 CID90536
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This makes the code more robust

Related to CID703820
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Allow to show the supported options in the ffmpeg -h full output.

Sample from ticket #1216 does not use any compression but bitstream
claims it is. Reference decoder decodes sample just fine.

Fixes #1216.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes CID603186
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Michael Bradshaw

This ensure that decode_plane() mmx code like AV_COPY64()
does not interfere with possible float instructions in
release_buffer/get_buffer.

Found-by: Carl Eugen Hoyos
Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes CID733838
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The option chapter is based on the avoptions_codec.texi auto-generated
file.

The file name can be set by setting the FFREPORT environment
variable to "file=something".

Fix trac ticket #1823.

This function does the low-level work of av_opt_set_from_string()
but can be used when there is no option context or when a generic
handling of unknown keys is needed.

av_opt_set_from_string() is changed to make use of it.

It removes the hardcoded limit on the key size without making
the code much more complex, and it makes for a more versatile API.

This reverts commit 841bf0ef.
This does not fully work as the file is used before the filename is parsed
so not all information is written in the specified file.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Fixes CID703674
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID741417
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID741418
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Slightly simplify readability, since the initial check is unnecessary.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The help text tells what the option does, not what the accepted parameter
is. Thus convert strings of the kind:

Bikeshed Color
to
set bikeshed color

It does not make sense to set a negative bitrate.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Wording suggested by Stefano Sabatini, should have been
merged with the previous commit.

Signed-off-by: Paul B Mahol <onemda@gmail.com>