[FFmpeg-devel] [PATCH v1] avformat/smoothstreamingenc:add bitrate calculate

[Jun Li]

Thanks !
Updated to AV_LOG_WARNING, 2nd version patch is here
https://patchwork.ffmpeg.org/patch/12237/

On Thu, Mar 7, 2019 at 1:39 AM Steven Liu <lingjiujianke at gmail.com> wrote:

> Jun Li <junli1026 at gmail.com> 于2019年3月6日周三 上午3:25写道：
> >
> > From: jun <junli1026 at gmail.com>
> >
> > Calculate bitrate based on fragment size, only applied when
> > bitrate is not set, for example rtsp source.
> >
> > Signed-off-by: Jun Li <junli1026 at gmail.com>
> > ---
> >  libavformat/smoothstreamingenc.c | 30 +++++++++++++++++++++++++-----
> >  1 file changed, 25 insertions(+), 5 deletions(-)
> >
> > diff --git a/libavformat/smoothstreamingenc.c
> b/libavformat/smoothstreamingenc.c
> > index 094712af27..1d969ab037 100644
> > --- a/libavformat/smoothstreamingenc.c
> > +++ b/libavformat/smoothstreamingenc.c
> > @@ -320,11 +320,12 @@ static int ism_write_header(AVFormatContext *s)
> >          AVDictionary *opts = NULL;
> >
> >          if (!s->streams[i]->codecpar->bit_rate) {
> > -            av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n",
> i);
> > -            ret = AVERROR(EINVAL);
> > -            goto fail;
> > +            av_log(s, AV_LOG_WARNING, "No bit rate set for stream
> %d\n", i);
> > +            snprintf(os->dirname, sizeof(os->dirname),
> "%s/QualityLevels(Tmp_%"PRId64")", s->url, i);
> > +        } else {
> > +            snprintf(os->dirname, sizeof(os->dirname),
> "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
> >          }
> > -        snprintf(os->dirname, sizeof(os->dirname),
> "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
> > +
> >          if (mkdir(os->dirname, 0777) == -1 && errno != EEXIST) {
> >              ret = AVERROR(errno);
> >              av_log(s, AV_LOG_ERROR, "mkdir failed\n");
> > @@ -519,7 +520,7 @@ static int ism_flush(AVFormatContext *s, int final)
> >
> >      for (i = 0; i < s->nb_streams; i++) {
> >          OutputStream *os = &c->streams[i];
> > -        char filename[1024], target_filename[1024],
> header_filename[1024];
> > +        char filename[1024], target_filename[1024],
> header_filename[1024], curr_dirname[1024];
> >          int64_t size;
> >          int64_t start_ts, duration, moof_size;
> >          if (!os->packets_written)
> > @@ -541,6 +542,25 @@ static int ism_flush(AVFormatContext *s, int final)
> >          size = os->tail_pos - os->cur_start_pos;
> >          if ((ret = parse_fragment(s, filename, &start_ts, &duration,
> &moof_size, size)) < 0)
> >              break;
> > +
> > +        if (!s->streams[i]->codecpar->bit_rate) {
> > +            int64_t bitrate = (int64_t) size * 8 * AV_TIME_BASE /
> av_rescale_q(duration, s->streams[i]->time_base, AV_TIME_BASE_Q);
> > +            if (!bitrate) {
> > +                av_log(s, AV_LOG_ERROR, "calculating bitrate get
> zero.");
> > +                ret = AVERROR(EINVAL);
> > +                return ret;
> > +            }
> > +
> > +            av_log(s, AV_LOG_INFO, "calculated bitrate: %ld\n",
> bitrate);
> maybe use AV_LOG_DEBUG or AV_LOG_WARNING is better than AV_LOG_INFO
> here, this should unnecessary message default.
> > +            s->streams[i]->codecpar->bit_rate = bitrate;
> > +            memcpy(curr_dirname, os->dirname, sizeof(os->dirname));
> > +            snprintf(os->dirname, sizeof(os->dirname),
> "%s/QualityLevels(%"PRId64")", s->url, s->streams[i]->codecpar->bit_rate);
> > +            snprintf(filename, sizeof(filename), "%s/temp",
> os->dirname);
> > +
> > +            if ((ret = ff_rename((const char*)curr_dirname,
> os->dirname, s)) < 0)
> > +                return ret;
> > +        }
> > +
> >          snprintf(header_filename, sizeof(header_filename),
> "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag,
> start_ts);
> >          snprintf(target_filename, sizeof(target_filename),
> "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts);
> >          copy_moof(s, filename, header_filename, moof_size);
> > --
> > 2.17.1
> >
> > _______________________________________________
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> > ffmpeg-devel at ffmpeg.org
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>