Fix flush resampling context

[Polochon-street]

Changed two things:
I saw rust-ffmpeg4-sys version was bumped, but it's still not working using 4.2.2 so just switched the branch to the stable version (it's failing anyways 😄 )
More important change: I've removed the alloc() in the context resampling, since swr_convert_frame allocates stuff itself here https://ffmpeg.org/doxygen/trunk/swresample__frame_8c_source.html more precisely, calculating itself the number of frame needed. Also fixed the flush()

Hope it makes sense 😄

[bacek]

It should work with master branch of ffmpeg4-sys. I just can't release -sys crate because it's version is tied to ffmpeg, which is unfortunate.

[Polochon-street]

Err, just cloning it gives

polochon@arch-coucou rust-ffmpeg4 $ cargo build --verbose --features "build"                       [0]
    Updating crates.io index
    Updating git repository `https://github.com/bacek/rust-ffmpeg4-sys`
error: no matching package named `ffmpeg4-sys` found
location searched: https://github.com/bacek/rust-ffmpeg4-sys
prerelease package needs to be specified explicitly
ffmpeg4-sys = { version = "4.3.0-pre.0" }
required by package `ffmpeg4 v0.4.0 (/home/polochon/rust-ffmpeg4)`

I guess master's travis build is passing because it has been built prior to the rust-ffmpeg4-sys bump?

[bacek]

Yes, it is.

…

On Wed, Mar 18, 2020 at 8:39 AM Polochon-street ***@***.***> wrote: ***@***.**** commented on this pull request. ------------------------------ In .travis.yml <#6 (comment)>: > @@ -33,3 +33,4 @@ before_install: script: | travis_wait cargo build --verbose --features "build" I guess cargo build --examples... should be enough? :) — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#6 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAFFELHQM7XKYW5H7V7HILRH7UXXANCNFSM4LDRRLYA> .

-- Regards, Vasily

[Polochon-street]

@bacek I've updated stuff with your latest changes on ffmpeg4-sys, how does it look?
It passes on my machine, but hard to tell without the travis build 😄