misc style fixes.

Reviewed-by: Steven Liu <liuqi05@kuaishou.com>
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

Use 0, which selects the alignment automatically.

Now they are exactly 10 seconds long.

Fixes #5684.

This patch moves the av_frame_make_writable() call from fill_yuv_image
to get_video_frame so that its argument can be the actual frame that
will be sent to the encoder.

This fixes data corruption issues in codecs that keep references on
one or several previous frames.

Signed-off-by: Sam Hocevar <sam@hocevar.net>
Reviewed-by: wm4
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

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

Reduces difference to 56f98e340f

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

Bug found from comparing 56f98e340f to HEAD
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Idea-from: 56f98e340f
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

This would allow the example to be used in regression tests

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

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

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

Idea from: 56f98e340f
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

This makes the examples page less cluttered

Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Set duration to 10 seconds, after it was increased from 5 to 200 seconds
in 8d80f3cb87.

200 seconds will generate too much data which is annoying especially when
testing.

More consistent and more future-proof.

Also log output packet information.

Rely on frame_count. Also more consistent with audio path.

Fixes use of the example with encoders which use tha AVFrame w/h/pix_fmt fields
FFV1 is one of these codecs

We cannot easily workaround the not set fields in common code because the API
has AVFrame constant for the encoders.
Alternatives would be to fix the API or to duplicate the struct and fill in
missing fields. Or as is to require all user apps to set this correctly and
maybe simplify for that case

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

In particular, fix trac ticket #3231.

Simplify logic, avoid multiple unnecessary alloc/free operations.

Fix PTS set on the frame when encoding, which must be specified in the
encoder timebase or this will confuse the encoder.

When muxing the packet, the PTS/DTS generated by the encoder is then
rescaled to the stream timebase.

Avoid the need of tweaking, also show how to get list of supported sample
formats.

- do not allocate resample dst buffer when resample is off
  - free sample buffers in addition to freeing data pointer arrays

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

We generate S16 samples and we should allocate the right buffer

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

Hi list! Since my last patch (fix 2 memleaks in doc/examples/muxing.c)
I found more problems to fix.

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

Allows to encode to output in case the destination sample format is
different from AV_SAMPLE_FMT_S16.

The new name is less confusing, since the variables represent times
rather than timestamps.

Simpler and less confusing.

Do not re-call avcodec_get_context_defaults3(), it is already
called by avformat_new_stream() and it leaks the codec
priv_data that was already allocated.

Use avformat_free_context() instead of freeing (not)
everything manually.

Fix trac ticket #2322.

Illustrate the use of return values, av_err2str and
avcodec_get_name.

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

Factorize.

Fix crash in case frame is not defined (e.g. with muxing out.wav).