This is meant to address trac ticket #1483.

Consistent with the image2 muxer.

Factorize.

The new options reset the timestamps at each new segment, so that the
generated segments will have timestamps starting close to 0.

It is meant to address trac ticket #1425.

The code should not assert in case of invalid user input. Fails
gracefully instead.

From the M3U8 specification:
|The EXT-X-MEDIA-SEQUENCE tag indicates the sequence number of the first
|URI that appears in a Playlist file.

Previously it was using the list index number. Also remove now unused
list_count field.

Increment the value just when a new segment with the given index is
started. Simplify logic, improve readability.

The segment muxer presumes the use of AVFMT_GLOBALHEADER, ssegment should
be use in case of formats which requires no global headers.

Regression introduced when merging
0826d851.

Some muxers do not allow stream if codec_tag is incompatible.

Sometimes the passed input codec's codec_tag is not compatible with the
output muxer.

Because the codec_tag field of the segment muxer cannot be set, ffmpeg.c
doesn't know how to handle these cases.
Signed-off-by: ChanMin Kim <kcm1700@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Since the pointer `oc' is NULL, oc->oformat->name will cause a null
pointer dereference.  This patch changes it to seg->oformat->name.
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Martin Storsjö <martin@martin.st>

Fixes CID732220
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

avconv provides an option to set it externally and there isn't a way for
the outer demuxer to report the inner demuxer flag.

Solves a bad interaction between mpegts and x264, but requires
additional setting for the user.

This fixes failures with formats not supporting negative TS
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Martin Storsjö <martin@martin.st>

This makes sure any buffered data is written to the segment, for
muxers that buffer up data internally (e.g. fragmented mp4).
Signed-off-by: Martin Storsjö <martin@martin.st>

This makes sure new inline headers are emitted when the next
packet is written. This allows segmenting mpegts without calling
write_header/write_trailer (nor freeing/reiniting the muxer)
for each segment.
Signed-off-by: Martin Storsjö <martin@martin.st>

Some segmented formats (such as fragmented mp4) are "bare", as in,
the segment files do not have the same headers/trailers as full normal
files of that format have.
Signed-off-by: Martin Storsjö <martin@martin.st>

This makes sure the muxers are set up in the way they expect
with no data left around from the previous run (which could
cause various issues including memory leaks, depending on the chaine
muxer).

This fixes memory leaks with the mpegts and flv muxers. It also
makes the usage of chained muxers correct.
Signed-off-by: Martin Storsjö <martin@martin.st>

With this change, the segmenter muxer doesn't rely on anything
not available/supported to libavformat external users, making
the segmenter muxer do things just like a normal segmenter
application using libavformat would do.
Signed-off-by: Martin Storsjö <martin@martin.st>

Before, the chained muxer reused the AVStreams array from
the outer muxer, which made it impossible to use the proper
public functions (such as av_write_frame) when calling the
chained muxer.
Signed-off-by: Martin Storsjö <martin@martin.st>

This allows writing totally bare segments, without any header/trailer
included anywhere.
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

This might not be needed at the moment, but it's good practice to
pass it to all chained AVFormatContexts, if it would happen to be
used there at a later point.
Signed-off-by: Martin Storsjö <martin@martin.st>

Remove a bogus warning when using segment_list_type csv.

The LIST_TYPE_EXT constant is only used internally, so it can
be removed when the feature (segment_list_type ext) gets removed.
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>

Rename a local variable to make the code more self-explanatory.
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>

Should also be faster (though I doubt that hardly ever matters
for the usage here).

Also remove the pointer copy. Since we do not need to reset the
pointer to the start of the string, it is not needed anymore.
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>

Allow to specify options affecting the segment list generation.

In particular: add +live and +cache flags.

For a full discussion read trac ticket #1642:
http://ffmpeg.org/trac/ffmpeg/ticket/1642

Also add live M3U8 generation example.

Signed-off-by: Martin Storsjö <martin@martin.st>

The new option name is more descriptive.

CSV escaping code is borrowed from ffprobe.c.

There is nothing we use of the latest version, downgrade version number
to increase decoding support.

Based on this comment by vel2000:
http://ffmpeg.org/trac/ffmpeg/ticket/1642#comment:17

Use ceil on the max duration, rather than approximating it to the nearest
integer.

This is technically a major compatibility break, but seems the most
natural default and what users would expect without reading the docs.