It's broken and doesn't work anyway.

This patch means that avconv will ignore encoding options from the ffm
file and will instead use whatever is provided on the commandline as for
normal output.

All the currently supported OS-es manage to use return values
properly.

This avoids allocating/freeing an AVFrame for each packet decode. It also
simplifies error handling in transcode_audio() and transcode_video().

Commit 035af99 made avconv always call an encoder when using the
null muxer.  While useful for 2-pass encodes, it inadvertently
caused an extra memcpy of raw frames when decoding only.

This hack restores the old behaviour when only decoding while
allowing use of the null muxer with encoded streams as well.

Signed-off-by: Mans Rullgard <mans@mansr.com>

I.e. on streamcopy set output codec timebase from input stream timebase
(as opposed to input codec timebase). This should be more sane, because
since the stream is not decoded, the input codec tb has no relation to
the timestamps of the copied packets.

This was broken in 2a651b719c.

Also fix reporting of the number of samples added/dropped.

At EOF it makes no sense to modify avpkt.{data,size} in output_packet
since no data is consumed. Frame threading with more than 1 threads
hits the segfault.

I.e. if the packet was only partially consumed, pass the rest of it into
the decoder again.

Also simplify the code so it's the same for video/audio/subs.

Prevent avconv from duplicating or dropping frames for formats where it
makes even less sense than usual, e.g. image2.

Use PIX_FMT_NONE instead of -1 when dealing with PixelFormat variables.

This is easier to understand and is less likely to break horribly when a
stream is to be both decoded and copied.

Fix spacing, vertically align, break some long lines, add some empty
lines for readability.

Output AVFormatContext is called 'oc' in most other places.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

The problem they are supposed to fix is handled in riff.c, so those
hacks are pointless.

Also document it.

Calling the init function will become mandatory at some later
point. By calling it, more heavy network init (such as SSL/TLS
library init) can be done once at startup, instead of implicitly
when used (which could lead to it being done a number of times).

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

It allows attaching arbitrary files, e.g. fonts to Matroska files.

This symbol name clashes with a symbol in gnutls, if linking
statically to that library.

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

It is broken because an AVCodecContext can be opened/closed multiple
times, and sample_rate is getting divided by 2 each time that happens.

This removes the only use of lowres for audio.

It's only used in avconv, so it properly belongs to OutputStream struct
there.

Prevents -c copy from working for input streams and allows to move
stream_copy variable from AVStream to OutputStream.

Deprecate AVFormatContext.preload.

Manual replacements are done in this commit.

In many cases, the id is some constant made up number (e.g. 0 for video
and 1 for audio), which is then not used in the demuxer for anything.
Those ids are removed.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This saves a bit of typing.

Signed-off-by: Mans Rullgard <mans@mansr.com>

It's now possible to disable printing stats during encoding with
-nostats, so there's no reason to print them differently depending on
whether it's last report or not.