Force one stream for raw muxers.

Based on eeb975f5
Fixes ticket #3217.

Reviewed-by: Nicolas George

libavformat/rawenc.c

@@ -29,6 +29,16 @@ int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
     return 0;
 }
 
+static int force_one_stream(AVFormatContext *s)
+{
+    if (s->nb_streams != 1) {
+        av_log(s, AV_LOG_ERROR, "%s files have exactly one stream\n",
+               s->oformat->name);
+        return AVERROR(EINVAL);
+    }
+    return 0;
+}
+
 /* Note: Do not forget to add new entries to the Makefile as well. */
 
 #if CONFIG_AC3_MUXER
@@ -39,6 +49,7 @@ AVOutputFormat ff_ac3_muxer = {
     .extensions        = "ac3",
     .audio_codec       = AV_CODEC_ID_AC3,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -51,6 +62,7 @@ AVOutputFormat ff_adx_muxer = {
     .extensions        = "adx",
     .audio_codec       = AV_CODEC_ID_ADPCM_ADX,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -63,6 +75,7 @@ AVOutputFormat ff_cavsvideo_muxer = {
     .extensions        = "cavs",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_CAVS,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -72,6 +85,7 @@ AVOutputFormat ff_cavsvideo_muxer = {
 AVOutputFormat ff_data_muxer = {
     .name              = "data",
     .long_name         = NULL_IF_CONFIG_SMALL("raw data"),
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -84,6 +98,7 @@ AVOutputFormat ff_dirac_muxer = {
     .extensions        = "drc",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_DIRAC,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -96,6 +111,7 @@ AVOutputFormat ff_dnxhd_muxer = {
     .extensions        = "dnxhd",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_DNXHD,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -109,6 +125,7 @@ AVOutputFormat ff_dts_muxer = {
     .extensions        = "dts",
     .audio_codec       = AV_CODEC_ID_DTS,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -122,6 +139,7 @@ AVOutputFormat ff_eac3_muxer = {
     .extensions        = "eac3",
     .audio_codec       = AV_CODEC_ID_EAC3,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -135,6 +153,7 @@ AVOutputFormat ff_g722_muxer = {
     .extensions        = "g722",
     .audio_codec       = AV_CODEC_ID_ADPCM_G722,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -148,6 +167,7 @@ AVOutputFormat ff_g723_1_muxer = {
     .extensions        = "tco,rco",
     .audio_codec       = AV_CODEC_ID_G723_1,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -161,6 +181,7 @@ AVOutputFormat ff_h261_muxer = {
     .extensions        = "h261",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_H261,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -174,6 +195,7 @@ AVOutputFormat ff_h263_muxer = {
     .extensions        = "h263",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_H263,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -186,6 +208,7 @@ AVOutputFormat ff_h264_muxer = {
     .extensions        = "h264",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_H264,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -211,6 +234,7 @@ AVOutputFormat ff_mjpeg_muxer = {
     .extensions        = "mjpg,mjpeg",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_MJPEG,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -223,6 +247,7 @@ AVOutputFormat ff_mlp_muxer = {
     .extensions        = "mlp",
     .audio_codec       = AV_CODEC_ID_MLP,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -236,6 +261,7 @@ AVOutputFormat ff_mpeg1video_muxer = {
     .extensions        = "mpg,mpeg,m1v",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_MPEG1VIDEO,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -248,6 +274,7 @@ AVOutputFormat ff_mpeg2video_muxer = {
     .extensions        = "m2v",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_MPEG2VIDEO,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -272,6 +299,7 @@ AVOutputFormat ff_truehd_muxer = {
     .extensions        = "thd",
     .audio_codec       = AV_CODEC_ID_TRUEHD,
     .video_codec       = AV_CODEC_ID_NONE,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };
@@ -284,6 +312,7 @@ AVOutputFormat ff_vc1_muxer = {
     .extensions        = "vc1",
     .audio_codec       = AV_CODEC_ID_NONE,
     .video_codec       = AV_CODEC_ID_VC1,
+    .write_header      = force_one_stream,
     .write_packet      = ff_raw_write_packet,
     .flags             = AVFMT_NOTIMESTAMPS,
 };