On Fri, Mar 30, 2018 at 02:47:25PM +0200, Bodecs Bela wrote: > Hi All, > > regularly, on different forums and mailing lists a requirement popups for a > feature to automatically failover switching between main input and a > secondary input in case of main input unavailability. > > The base motivation: let's say you have a unreliable live stream source and > you > want to transcode its video and audio streams in realtime but you > want to survive the ocasions when the source is unavailable. So use a > secondary live source but the transition should occur seamlessly without > breaking/re-starting the transcoding processs. > > Some days ago there was a discussion on devel-irc about this topic and we > concluded that this feature is not feasible inside ffmpeg without "hacking", > but a separate client app could do this. > > So I created this example app to handle two separate input sources and > switching realtime between them. I am not sure wheter it should be inside > the tools subdir. > > The detailed description is available in the header section of the source > file. > > I will appretiate your suggestions about it. > > Thank you in advance. > > best, > > Bela Bodecs > >
> configure | 2
> doc/examples/Makefile | 1
> doc/examples/Makefile.example | 1
> doc/examples/alternative_input.c | 1233
> +++++++++++++++++++++++++++++++++++++++
You may want to add yourself to MAINTAINERS, so it is not unmaintained
I think this is complex enough that it needs a maintainer
[...]
> +static int open_single_input(int input_index)
> +{
> + int ret, i;
> + AVInputFormat *input_format = NULL;
> + AVDictionary * input_options = NULL;
> + AVFormatContext * input_fmt_ctx = NULL;
> +
> + if (app_ctx.input_format_names[input_index]) {
> + if (!(input_format =
> av_find_input_format(app_ctx.input_format_names[input_index]))) {
> + timed_log(AV_LOG_ERROR, "Input #%d Unknown input format:
> '%s'\n", input_index,
> + app_ctx.input_format_names[input_index]);
> + return EINVAL;
> + }
> + }
> +
> + av_dict_set(&input_options, "rw_timeout", "2000000", 0);
> + av_dict_set(&input_options, "timeout", "2000", 0);
> + if ((app_ctx.input_fmt_ctx[input_index] = avformat_alloc_context()) < 0)
> + return AVERROR(ENOMEM);
i guess this was intended to be "!= NULL"
also you are mixing EINVAL with AVERROR(ENOMEM) these arent compatible.
Either all should be AVERROR or none
thx
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
No great genius has ever existed without some touch of madness. -- Aristotle
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