diff options
| author | Marton Balint <cus@passwd.hu> | 2020-07-04 23:43:12 +0200 |
|---|---|---|
| committer | Marton Balint <cus@passwd.hu> | 2020-07-29 23:10:12 +0200 |
| commit | 53a4620fbae20b640d7fd75a64a6d3ff6dcc8b43 (patch) | |
| tree | 59e21ad899a8dc19325f2d58bf805b64a9b97333 | |
| parent | 6ceaeecaf562020f25beab0614157fb2dae32391 (diff) | |
| download | ffmpeg-53a4620fbae20b640d7fd75a64a6d3ff6dcc8b43.tar.gz | |
fftools/ffmpeg: make specifying thread_queue_size turn on threaded input
Threaded input can increase smoothness of e.g. x11grab significantly. Before
this patch, in order to activate threaded input the user had to specify a
"dummy" additional input, with this change it is no longer required.
Signed-off-by: Marton Balint <cus@passwd.hu>
| -rw-r--r-- | doc/ffmpeg.texi | 5 | ||||
| -rw-r--r-- | fftools/ffmpeg.c | 6 | ||||
| -rw-r--r-- | fftools/ffmpeg_opt.c | 3 |
3 files changed, 9 insertions, 5 deletions
diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 70b8965d7f..267ddfe8b5 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -1689,8 +1689,9 @@ not start from timestamp 0, such as transport streams. @item -thread_queue_size @var{size} (@emph{input}) This option sets the maximum number of queued packets when reading from the file or device. With low latency / high rate live streams, packets may be -discarded if they are not read in a timely manner; raising this value can -avoid it. +discarded if they are not read in a timely manner; setting this value can +force ffmpeg to use a separate input thread and read packets as soon as they +arrive. By default ffmpeg only do this if multiple inputs are specified. @item -sdp_file @var{file} (@emph{global}) Print sdp information for an output stream to @var{file}. diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c index 2e9448ea2b..173ac3c9a0 100644 --- a/fftools/ffmpeg.c +++ b/fftools/ffmpeg.c @@ -4051,7 +4051,9 @@ static int init_input_thread(int i) int ret; InputFile *f = input_files[i]; - if (nb_input_files == 1) + if (f->thread_queue_size < 0) + f->thread_queue_size = (nb_input_files > 1 ? 8 : 0); + if (!f->thread_queue_size) return 0; if (f->ctx->pb ? !f->ctx->pb->seekable : @@ -4105,7 +4107,7 @@ static int get_input_packet(InputFile *f, AVPacket *pkt) } #if HAVE_THREADS - if (nb_input_files > 1) + if (f->thread_queue_size) return get_input_packet_mt(f, pkt); #endif return av_read_frame(f->ctx, pkt); diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c index 9d1489ce01..853550a142 100644 --- a/fftools/ffmpeg_opt.c +++ b/fftools/ffmpeg_opt.c @@ -228,6 +228,7 @@ static void init_options(OptionsContext *o) o->limit_filesize = UINT64_MAX; o->chapters_input_file = INT_MAX; o->accurate_seek = 1; + o->thread_queue_size = -1; } static int show_hwaccels(void *optctx, const char *opt, const char *arg) @@ -1270,7 +1271,7 @@ static int open_input_file(OptionsContext *o, const char *filename) f->duration = 0; f->time_base = (AVRational){ 1, 1 }; #if HAVE_THREADS - f->thread_queue_size = o->thread_queue_size > 0 ? o->thread_queue_size : 8; + f->thread_queue_size = o->thread_queue_size; #endif /* check if all codec options have been used */ |