From: Jan Sebechlebsky <sebechlebsky...@gmail.com>
Adds per slave option 'onfail' to the tee muxer allowing an output to
fail,so other slave outputs can continue.
Signed-off-by: Jan Sebechlebsky <sebechlebsky...@gmail.com>
---
Thanks for pointing on the problem with testing enum for negative value.
I've fixed that, so parse_slave_failure_policy_option returns only error value
and sets value of enum by using pointer - I think it also looks nicer to have
it this way.
doc/muxers.texi | 14 ++++++++
libavformat/tee.c | 104 +++++++++++++++++++++++++++++++++++++++++++++---------
2 files changed, 102 insertions(+), 16 deletions(-)
diff --git a/doc/muxers.texi b/doc/muxers.texi
index 042efce..c62d4b5 100644
--- a/doc/muxers.texi
+++ b/doc/muxers.texi
@@ -1453,6 +1453,12 @@ Select the streams that should be mapped to the slave
output,
specified by a stream specifier. If not specified, this defaults to
all the input streams. You may use multiple stream specifiers
separated by commas (@code{,}) e.g.: @code{a:0,v}
+
+@item onfail
+Specify behaviour on output failure. This can be set to either @code{abort}
(which is
+default) or @code{ignore}. @code{abort} will cause whole process to fail in
case of failure
+on this slave output. @code{ignore} will ignore failure on this output, so
other outputs
+will continue without being affected.
@end table
@subsection Examples
@@ -1467,6 +1473,14 @@ ffmpeg -i ... -c:v libx264 -c:a mp2 -f tee -map 0:v -map
0:a
@end example
@item
+As above, but continue streaming even if output to local file fails
+(for example local drive fills up):
+@example
+ffmpeg -i ... -c:v libx264 -c:a mp2 -f tee -map 0:v -map 0:a
+ "[onfail=ignore]archive-20121107.mkv|[f=mpegts]udp://10.0.1.255:1234/"
+@end example
+
+@item
Use @command{ffmpeg} to encode the input, and send the output
to three different destinations. The @code{dump_extra} bitstream
filter is used to add extradata information to all the output video
diff --git a/libavformat/tee.c b/libavformat/tee.c
index 222826a..a6892c2 100644
--- a/libavformat/tee.c
+++ b/libavformat/tee.c
@@ -29,10 +29,19 @@
#define MAX_SLAVES 16
+typedef enum {
+ ON_SLAVE_FAILURE_ABORT = 1,
+ ON_SLAVE_FAILURE_IGNORE = 2
+} SlaveFailurePolicy;
+
+#define DEFAULT_SLAVE_FAILURE_POLICY ON_SLAVE_FAILURE_ABORT
+
typedef struct {
AVFormatContext *avf;
AVBitStreamFilterContext **bsfs; ///< bitstream filters per stream
+ SlaveFailurePolicy on_fail;
+
/** map from input to output streams indexes,
* disabled output streams are set to -1 */
int *stream_map;
@@ -41,6 +50,7 @@ typedef struct {
typedef struct TeeContext {
const AVClass *class;
unsigned nb_slaves;
+ unsigned nb_alive;
TeeSlave slaves[MAX_SLAVES];
} TeeContext;
@@ -135,6 +145,23 @@ end:
return ret;
}
+static inline int parse_slave_failure_policy_option(const char *opt, TeeSlave
*tee_slave)
+{
+ if (!opt) {
+ tee_slave->on_fail = DEFAULT_SLAVE_FAILURE_POLICY;
+ return 0;
+ } else if (!av_strcasecmp("abort", opt)) {
+ tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
+ return 0;
+ } else if (!av_strcasecmp("ignore", opt)) {
+ tee_slave->on_fail = ON_SLAVE_FAILURE_IGNORE;
+ return 0;
+ }
+ /* Set failure behaviour to abort, so invalid option error will not be
ignored */
+ tee_slave->on_fail = ON_SLAVE_FAILURE_ABORT;
+ return AVERROR(EINVAL);
+}
+
static void close_slave(TeeSlave *tee_slave)
{
AVFormatContext *avf;
@@ -178,7 +205,7 @@ static int open_slave(AVFormatContext *avf, char *slave,
TeeSlave *tee_slave)
AVDictionary *options = NULL;
AVDictionaryEntry *entry;
char *filename;
- char *format = NULL, *select = NULL;
+ char *format = NULL, *select = NULL, *on_fail = NULL;
AVFormatContext *avf2 = NULL;
AVStream *st, *st2;
int stream_count;
@@ -198,6 +225,14 @@ static int open_slave(AVFormatContext *avf, char *slave,
TeeSlave *tee_slave)
STEAL_OPTION("f", format);
STEAL_OPTION("select", select);
+ STEAL_OPTION("onfail", on_fail);
+
+ ret = parse_slave_failure_policy_option(on_fail, tee_slave);
+ if (ret < 0) {
+ av_log(avf, AV_LOG_ERROR,
+ "Invalid onfail option value, valid options are 'abort' and
'ignore'\n");
+ goto end;
+ }
ret = avformat_alloc_output_context2(&avf2, NULL, format, filename);
if (ret < 0)
@@ -344,6 +379,7 @@ static int open_slave(AVFormatContext *avf, char *slave,
TeeSlave *tee_slave)
end:
av_free(format);
av_free(select);
+ av_free(on_fail);
av_dict_free(&options);
av_freep(&tmp_select);
return ret;
@@ -376,6 +412,32 @@ static void log_slave(TeeSlave *slave, void *log_ctx, int
log_level)
}
}
+static int tee_process_slave_failure(AVFormatContext *avf, unsigned slave_idx,
+ int err_n, unsigned char write_trailer)
+{
+ TeeContext *tee = avf->priv_data;
+ TeeSlave *tee_slave = &tee->slaves[slave_idx];
+
+ tee->nb_alive--;
+
+ if (write_trailer)
+ av_write_trailer(tee_slave->avf);
+
+ close_slave(tee_slave);
+
+ if (!tee->nb_alive) {
+ av_log(avf, AV_LOG_ERROR, "All tee outputs failed.\n");
+ return err_n;
+ } else if (tee_slave->on_fail == ON_SLAVE_FAILURE_ABORT) {
+ av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, aborting.\n",
slave_idx);
+ return err_n;
+ } else {
+ av_log(avf, AV_LOG_ERROR, "Slave muxer #%u failed, continuing with
%u/%u slaves.\n",
+ slave_idx, tee->nb_alive, tee->nb_slaves);
+ return 0;
+ }
+}
+
static int tee_write_header(AVFormatContext *avf)
{
TeeContext *tee = avf->priv_data;
@@ -399,22 +461,24 @@ static int tee_write_header(AVFormatContext *avf)
filename++;
}
- tee->nb_slaves = 0;
+ tee->nb_slaves = tee->nb_alive = nb_slaves;
for (i = 0; i < nb_slaves; i++) {
if ((ret = open_slave(avf, slaves[i], &tee->slaves[i])) < 0) {
- close_slave(&tee->slaves[i]);
- goto fail;
+ ret = tee_process_slave_failure(avf, i, ret, 0);
+ if (ret < 0)
+ goto fail;
+ } else {
+ log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
}
- log_slave(&tee->slaves[i], avf, AV_LOG_VERBOSE);
av_freep(&slaves[i]);
- tee->nb_slaves++;
}
for (i = 0; i < avf->nb_streams; i++) {
int j, mapped = 0;
for (j = 0; j < tee->nb_slaves; j++)
- mapped += tee->slaves[j].stream_map[i] >= 0;
+ if (tee->slaves[j].avf)
+ mapped += tee->slaves[j].stream_map[i] >= 0;
if (!mapped)
av_log(avf, AV_LOG_WARNING, "Input stream #%d is not mapped "
"to any slave.\n", i);
@@ -422,10 +486,11 @@ static int tee_write_header(AVFormatContext *avf)
return 0;
fail:
- for (i = 0; i < nb_slaves; i++)
+ for (i = 0; i < nb_slaves; i++) {
av_freep(&slaves[i]);
- for (i = 0; i < tee->nb_slaves; i++)
- av_write_trailer(tee->slaves[i].avf);
+ if (tee->slaves[i].avf)
+ av_write_trailer(tee->slaves[i].avf);
+ }
close_slaves(avf);
return ret;
}
@@ -438,10 +503,13 @@ static int tee_write_trailer(AVFormatContext *avf)
unsigned i;
for (i = 0; i < tee->nb_slaves; i++) {
- avf2 = tee->slaves[i].avf;
- if ((ret = av_write_trailer(avf2)) < 0)
- if (!ret_all)
+ if (!(avf2 = tee->slaves[i].avf))
+ continue;
+ if ((ret = av_write_trailer(avf2)) < 0) {
+ ret = tee_process_slave_failure(avf2, i, ret, 0);
+ if (!ret_all && ret < 0)
ret_all = ret;
+ }
if (!(avf2->oformat->flags & AVFMT_NOFILE))
ff_format_io_close(avf2, &avf2->pb);
}
@@ -460,7 +528,9 @@ static int tee_write_packet(AVFormatContext *avf, AVPacket
*pkt)
AVRational tb, tb2;
for (i = 0; i < tee->nb_slaves; i++) {
- avf2 = tee->slaves[i].avf;
+ if (!(avf2 = tee->slaves[i].avf))
+ continue;
+
s = pkt->stream_index;
s2 = tee->slaves[i].stream_map[s];
if (s2 < 0)
@@ -481,9 +551,11 @@ static int tee_write_packet(AVFormatContext *avf, AVPacket
*pkt)
if ((ret = av_apply_bitstream_filters(avf2->streams[s2]->codec, &pkt2,
tee->slaves[i].bsfs[s2])) < 0 ||
- (ret = av_interleaved_write_frame(avf2, &pkt2)) < 0)
- if (!ret_all)
+ (ret = av_interleaved_write_frame(avf2, &pkt2)) < 0) {
+ ret = tee_process_slave_failure(avf, i, ret, 1);
+ if (!ret_all && ret < 0)
ret_all = ret;
+ }
}
return ret_all;
}
--
1.9.1
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