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ffmpeg.wasm-core
Commit 92f1940e authored by Anton Khirnov's avatar Anton Khirnov
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avconv: replace -vcodec/-acodec/-scodec with a better system. 

The new option doesn't depend on its placement wrt -new* options (which
don't exist anymore) and works in a similar way as per-stream AVOptions.

-[vas]codec remain as aliases to -codec:[vas]
parent ff884c79
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Showing with 135 additions and 164 deletions
avconv.c
View file @ 92f1940e
......@@ -110,6 +110,8 @@ static int nb_output_files = 0;
static StreamMap *stream_maps = NULL;
static int nb_stream_maps;
static AVDictionary *codec_names;
/* first item specifies output metadata, second is input */
static MetadataMap (*meta_data_maps)[2] = NULL;
static int nb_meta_data_maps;
......@@ -136,7 +138,6 @@ static uint16_t *inter_matrix = NULL;
static const char *video_rc_override_string=NULL;
static int video_disable = 0;
static int video_discard = 0;
static char *video_codec_name = NULL;
static unsigned int video_codec_tag = 0;
static char *video_language = NULL;
static int same_quality = 0;
......@@ -155,17 +156,14 @@ static int audio_sample_rate = 0;
static float audio_qscale = QSCALE_NONE;
static int audio_disable = 0;
static int audio_channels = 0;
static char *audio_codec_name = NULL;
static unsigned int audio_codec_tag = 0;
static char *audio_language = NULL;
static int subtitle_disable = 0;
static char *subtitle_codec_name = NULL;
static char *subtitle_language = NULL;
static unsigned int subtitle_codec_tag = 0;
static int data_disable = 0;
static char *data_codec_name = NULL;
static unsigned int data_codec_tag = 0;
static float mux_preload= 0.5;
......@@ -182,10 +180,6 @@ static int do_pkt_dump = 0;
static int do_psnr = 0;
static int do_pass = 0;
static char *pass_logfilename_prefix = NULL;
static int audio_stream_copy = 0;
static int video_stream_copy = 0;
static int subtitle_stream_copy = 0;
static int data_stream_copy = 0;
static int video_sync_method= -1;
static int audio_sync_method= 0;
static float audio_drift_threshold= 0.1;
......@@ -470,11 +464,6 @@ static int exit_program(int ret)
av_freep(&input_streams);
av_freep(&input_files);
av_free(video_codec_name);
av_free(audio_codec_name);
av_free(subtitle_codec_name);
av_free(data_codec_name);
uninit_opts();
av_free(audio_buf);
av_free(audio_out);
......@@ -648,7 +637,59 @@ static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
}
}
static OutputStream *new_output_stream(AVFormatContext *oc, int file_idx, AVCodec *codec)
static enum CodecID find_codec_or_die(const char *name, enum AVMediaType type, int encoder)
{
const char *codec_string = encoder ? "encoder" : "decoder";
AVCodec *codec;
if(!name)
return CODEC_ID_NONE;
codec = encoder ?
avcodec_find_encoder_by_name(name) :
avcodec_find_decoder_by_name(name);
if(!codec) {
av_log(NULL, AV_LOG_ERROR, "Unknown %s '%s'\n", codec_string, name);
exit_program(1);
}
if(codec->type != type) {
av_log(NULL, AV_LOG_ERROR, "Invalid %s type '%s'\n", codec_string, name);
exit_program(1);
}
return codec->id;
}
static AVCodec *choose_codec(AVFormatContext *s, AVStream *st, enum AVMediaType type, AVDictionary *codec_names)
{
AVDictionaryEntry *e = NULL;
char *codec_name = NULL;
int ret;
while (e = av_dict_get(codec_names, "", e, AV_DICT_IGNORE_SUFFIX)) {
char *p = strchr(e->key, ':');
if ((ret = check_stream_specifier(s, st, p ? p + 1 : "")) > 0)
codec_name = e->value;
else if (ret < 0)
exit_program(1);
}
if (!codec_name) {
if (s->oformat) {
st->codec->codec_id = av_guess_codec(s->oformat, NULL, s->filename, NULL, type);
return avcodec_find_encoder(st->codec->codec_id);
}
} else if (!strcmp(codec_name, "copy"))
st->stream_copy = 1;
else {
st->codec->codec_id = find_codec_or_die(codec_name, type, s->iformat == NULL);
return s->oformat ? avcodec_find_encoder_by_name(codec_name) :
avcodec_find_decoder_by_name(codec_name);
}
return NULL;
}
static OutputStream *new_output_stream(AVFormatContext *oc, int file_idx, enum AVMediaType type)
{
OutputStream *ost;
AVStream *st = av_new_stream(oc, oc->nb_streams < nb_streamid_map ? streamid_map[oc->nb_streams] : 0);
......@@ -673,13 +714,14 @@ static OutputStream *new_output_stream(AVFormatContext *oc, int file_idx, AVCode
ost->file_index = file_idx;
ost->index = idx;
ost->st = st;
ost->enc = codec;
if (codec) {
st->codec->codec_type = codec->type;
ost->opts = filter_codec_opts(codec_opts, codec->id, oc, st);
st->codec->codec_type = type;
ost->enc = choose_codec(oc, st, type, codec_names);
if (ost->enc) {
ost->opts = filter_codec_opts(codec_opts, ost->enc->id, oc, st);
}
avcodec_get_context_defaults3(st->codec, codec);
avcodec_get_context_defaults3(st->codec, ost->enc);
st->codec->codec_type = type; // XXX hack, avcodec_get_context_defaults2() sets type to unknown for stream copy
ost->sws_flags = av_get_int(sws_opts, "sws_flags", NULL);
return ost;
......@@ -701,7 +743,7 @@ static int read_avserver_streams(AVFormatContext *s, const char *filename)
AVCodec *codec;
codec = avcodec_find_encoder(ic->streams[i]->codec->codec_id);
ost = new_output_stream(s, nb_output_files, codec);
ost = new_output_stream(s, nb_output_files, codec->type);
st = ost->st;
// FIXME: a more elegant solution is needed
......@@ -709,17 +751,10 @@ static int read_avserver_streams(AVFormatContext *s, const char *filename)
st->info = NULL;
avcodec_copy_context(st->codec, ic->streams[i]->codec);
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
if (audio_stream_copy) {
st->stream_copy = 1;
} else
choose_sample_fmt(st, codec);
} else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
if (video_stream_copy) {
st->stream_copy = 1;
} else
choose_pixel_fmt(st, codec);
}
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && !st->stream_copy)
choose_sample_fmt(st, codec);
else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && !st->stream_copy)
choose_pixel_fmt(st, codec);
if(st->codec->flags & CODEC_FLAG_BITEXACT)
nopts = 1;
......@@ -2740,36 +2775,29 @@ static int opt_audio_channels(const char *opt, const char *arg)
return 0;
}
static int opt_codec(int *pstream_copy, char **pcodec_name,
int codec_type, const char *arg)
static int opt_codec(const char *opt, const char *arg)
{
av_freep(pcodec_name);
if (!strcmp(arg, "copy")) {
*pstream_copy = 1;
} else {
*pcodec_name = av_strdup(arg);
}
return 0;
return av_dict_set(&codec_names, opt, arg, 0);
}
static int opt_audio_codec(const char *opt, const char *arg)
{
return opt_codec(&audio_stream_copy, &audio_codec_name, AVMEDIA_TYPE_AUDIO, arg);
return opt_codec("codec:a", arg);
}
static int opt_video_codec(const char *opt, const char *arg)
{
return opt_codec(&video_stream_copy, &video_codec_name, AVMEDIA_TYPE_VIDEO, arg);
return opt_codec("codec:v", arg);
}
static int opt_subtitle_codec(const char *opt, const char *arg)
{
return opt_codec(&subtitle_stream_copy, &subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, arg);
return opt_codec("codec:s", arg);
}
static int opt_data_codec(const char *opt, const char *arg)
{
return opt_codec(&data_stream_copy, &data_codec_name, AVMEDIA_TYPE_DATA, arg);
return opt_codec("codec:d", arg);
}
static int opt_codec_tag(const char *opt, const char *arg)
......@@ -2954,26 +2982,6 @@ static int opt_input_ts_offset(const char *opt, const char *arg)
return 0;
}
static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
{
const char *codec_string = encoder ? "encoder" : "decoder";
AVCodec *codec;
if(!name)
return CODEC_ID_NONE;
codec = encoder ?
avcodec_find_encoder_by_name(name) :
avcodec_find_decoder_by_name(name);
if(!codec) {
fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
exit_program(1);
}
if(codec->type != type) {
fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
exit_program(1);
}
return codec->id;
}
static int opt_input_file(const char *opt, const char *filename)
{
......@@ -3024,12 +3032,6 @@ static int opt_input_file(const char *opt, const char *filename)
if (frame_pix_fmt != PIX_FMT_NONE)
av_dict_set(&format_opts, "pixel_format", av_get_pix_fmt_name(frame_pix_fmt), 0);
ic->video_codec_id =
find_codec_or_die(video_codec_name , AVMEDIA_TYPE_VIDEO , 0);
ic->audio_codec_id =
find_codec_or_die(audio_codec_name , AVMEDIA_TYPE_AUDIO , 0);
ic->subtitle_codec_id=
find_codec_or_die(subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, 0);
ic->flags |= AVFMT_FLAG_NONBLOCK;
/* open the input file with generic libav function */
......@@ -3064,6 +3066,10 @@ static int opt_input_file(const char *opt, const char *filename)
opt_programid=0;
}
/* apply forced codec ids */
for (i = 0; i < ic->nb_streams; i++)
choose_codec(ic, ic->streams[i], ic->streams[i]->codec->codec_type, codec_names);
/* Set AVCodecContext options for avformat_find_stream_info */
opts = setup_find_stream_info_opts(ic, codec_opts);
orig_nb_streams = ic->nb_streams;
......@@ -3111,14 +3117,14 @@ static int opt_input_file(const char *opt, const char *filename)
if (i < nb_ts_scale)
ist->ts_scale = ts_scale[i];
ist->dec = choose_codec(ic, st, dec->codec_type, codec_names);
switch (dec->codec_type) {
case AVMEDIA_TYPE_AUDIO:
ist->dec = avcodec_find_decoder_by_name(audio_codec_name);
if(audio_disable)
st->discard= AVDISCARD_ALL;
break;
case AVMEDIA_TYPE_VIDEO:
ist->dec = avcodec_find_decoder_by_name(video_codec_name);
rfps = ic->streams[i]->r_frame_rate.num;
rfps_base = ic->streams[i]->r_frame_rate.den;
if (dec->lowres) {
......@@ -3146,7 +3152,6 @@ static int opt_input_file(const char *opt, const char *filename)
case AVMEDIA_TYPE_DATA:
break;
case AVMEDIA_TYPE_SUBTITLE:
ist->dec = avcodec_find_decoder_by_name(subtitle_codec_name);
if(subtitle_disable)
st->discard = AVDISCARD_ALL;
break;
......@@ -3180,9 +3185,7 @@ static int opt_input_file(const char *opt, const char *filename)
for (i = 0; i < orig_nb_streams; i++)
av_dict_free(&opts[i]);
av_freep(&opts);
av_freep(&video_codec_name);
av_freep(&audio_codec_name);
av_freep(&subtitle_codec_name);
av_dict_free(&codec_names);
uninit_opts();
init_opts();
return 0;
......@@ -3193,22 +3196,10 @@ static OutputStream *new_video_stream(AVFormatContext *oc, int file_idx)
AVStream *st;
OutputStream *ost;
AVCodecContext *video_enc;
enum CodecID codec_id = CODEC_ID_NONE;
AVCodec *codec= NULL;
if(!video_stream_copy){
if (video_codec_name) {
codec_id = find_codec_or_die(video_codec_name, AVMEDIA_TYPE_VIDEO, 1);
codec = avcodec_find_encoder_by_name(video_codec_name);
} else {
codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, AVMEDIA_TYPE_VIDEO);
codec = avcodec_find_encoder(codec_id);
}
}
ost = new_output_stream(oc, file_idx, codec);
ost = new_output_stream(oc, file_idx, AVMEDIA_TYPE_VIDEO);
st = ost->st;
if (!video_stream_copy) {
if (!st->stream_copy) {
ost->frame_aspect_ratio = frame_aspect_ratio;
frame_aspect_ratio = 0;
#if CONFIG_AVFILTER
......@@ -3231,9 +3222,7 @@ static OutputStream *new_video_stream(AVFormatContext *oc, int file_idx)
video_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
video_enc->codec_type = AVMEDIA_TYPE_VIDEO;
if (video_stream_copy) {
st->stream_copy = 1;
if (st->stream_copy) {
video_enc->sample_aspect_ratio =
st->sample_aspect_ratio = av_d2q(frame_aspect_ratio*frame_height/frame_width, 255);
} else {
......@@ -3242,7 +3231,6 @@ static OutputStream *new_video_stream(AVFormatContext *oc, int file_idx)
if (frame_rate.num)
ost->frame_rate = frame_rate;
video_enc->codec_id = codec_id;
video_enc->width = frame_width;
video_enc->height = frame_height;
......@@ -3313,9 +3301,7 @@ static OutputStream *new_video_stream(AVFormatContext *oc, int file_idx)
/* reset some key parameters */
video_disable = 0;
av_freep(&video_codec_name);
av_freep(&forced_key_frames);
video_stream_copy = 0;
frame_pix_fmt = PIX_FMT_NONE;
return ost;
}
......@@ -3324,20 +3310,9 @@ static OutputStream *new_audio_stream(AVFormatContext *oc, int file_idx)
{
AVStream *st;
OutputStream *ost;
AVCodec *codec= NULL;
AVCodecContext *audio_enc;
enum CodecID codec_id = CODEC_ID_NONE;
if(!audio_stream_copy){
if (audio_codec_name) {
codec_id = find_codec_or_die(audio_codec_name, AVMEDIA_TYPE_AUDIO, 1);
codec = avcodec_find_encoder_by_name(audio_codec_name);
} else {
codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, AVMEDIA_TYPE_AUDIO);
codec = avcodec_find_encoder(codec_id);
}
}
ost = new_output_stream(oc, file_idx, codec);
ost = new_output_stream(oc, file_idx, AVMEDIA_TYPE_AUDIO);
st = ost->st;
ost->bitstream_filters = audio_bitstream_filters;
......@@ -3354,11 +3329,7 @@ static OutputStream *new_audio_stream(AVFormatContext *oc, int file_idx)
if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
audio_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
if (audio_stream_copy) {
st->stream_copy = 1;
} else {
audio_enc->codec_id = codec_id;
if (!st->stream_copy) {
if (audio_qscale > QSCALE_NONE) {
audio_enc->flags |= CODEC_FLAG_QSCALE;
audio_enc->global_quality = FF_QP2LAMBDA * audio_qscale;
......@@ -3377,8 +3348,6 @@ static OutputStream *new_audio_stream(AVFormatContext *oc, int file_idx)
/* reset some key parameters */
audio_disable = 0;
av_freep(&audio_codec_name);
audio_stream_copy = 0;
return ost;
}
......@@ -3389,29 +3358,22 @@ static OutputStream *new_data_stream(AVFormatContext *oc, int file_idx)
OutputStream *ost;
AVCodecContext *data_enc;
ost = new_output_stream(oc, file_idx, NULL);
ost = new_output_stream(oc, file_idx, AVMEDIA_TYPE_DATA);
st = ost->st;
data_enc = st->codec;
if (!data_stream_copy) {
if (!st->stream_copy) {
fprintf(stderr, "Data stream encoding not supported yet (only streamcopy)\n");
exit_program(1);
}
data_enc->codec_type = AVMEDIA_TYPE_DATA;
if (data_codec_tag)
data_enc->codec_tag= data_codec_tag;
if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
data_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
if (data_stream_copy) {
st->stream_copy = 1;
}
data_disable = 0;
av_freep(&data_codec_name);
data_stream_copy = 0;
return ost;
}
......@@ -3419,20 +3381,9 @@ static OutputStream *new_subtitle_stream(AVFormatContext *oc, int file_idx)
{
AVStream *st;
OutputStream *ost;
AVCodec *codec=NULL;
AVCodecContext *subtitle_enc;
enum CodecID codec_id = CODEC_ID_NONE;
if(!subtitle_stream_copy){
if (subtitle_codec_name) {
codec_id = find_codec_or_die(subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, 1);
codec = avcodec_find_encoder_by_name(subtitle_codec_name);
} else {
codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, AVMEDIA_TYPE_SUBTITLE);
codec = avcodec_find_encoder(codec_id);
}
}
ost = new_output_stream(oc, file_idx, codec);
ost = new_output_stream(oc, file_idx, AVMEDIA_TYPE_SUBTITLE);
st = ost->st;
subtitle_enc = st->codec;
......@@ -3447,11 +3398,6 @@ static OutputStream *new_subtitle_stream(AVFormatContext *oc, int file_idx)
if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
subtitle_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
if (subtitle_stream_copy) {
st->stream_copy = 1;
} else {
subtitle_enc->codec_id = codec_id;
}
if (subtitle_language) {
av_dict_set(&st->metadata, "language", subtitle_language, 0);
......@@ -3459,8 +3405,6 @@ static OutputStream *new_subtitle_stream(AVFormatContext *oc, int file_idx)
}
subtitle_disable = 0;
av_freep(&subtitle_codec_name);
subtitle_stream_copy = 0;
return ost;
}
......@@ -3742,6 +3686,8 @@ static void opt_output_file(const char *filename)
av_freep(&stream_maps);
nb_stream_maps = 0;
av_dict_free(&codec_names);
av_freep(&forced_key_frames);
uninit_opts();
init_opts();
......@@ -3949,8 +3895,8 @@ static int opt_target(const char *opt, const char *arg)
}
if(!strcmp(arg, "vcd")) {
opt_video_codec("vcodec", "mpeg1video");
opt_audio_codec("vcodec", "mp2");
opt_codec("c:v", "mpeg1video");
opt_codec("c:a", "mp2");
opt_format("f", "vcd");
opt_frame_size("s", norm == PAL ? "352x288" : "352x240");
......@@ -3977,8 +3923,8 @@ static int opt_target(const char *opt, const char *arg)
mux_preload= (36000+3*1200) / 90000.0; //0.44
} else if(!strcmp(arg, "svcd")) {
opt_video_codec("vcodec", "mpeg2video");
opt_audio_codec("acodec", "mp2");
opt_codec("c:v", "mpeg2video");
opt_codec("c:a", "mp2");
opt_format("f", "svcd");
opt_frame_size("s", norm == PAL ? "480x576" : "480x480");
......@@ -3999,8 +3945,8 @@ static int opt_target(const char *opt, const char *arg)
} else if(!strcmp(arg, "dvd")) {
opt_video_codec("vcodec", "mpeg2video");
opt_audio_codec("vcodec", "ac3");
opt_codec("c:v", "mpeg2video");
opt_codec("c:a", "ac3");
opt_format("f", "dvd");
opt_frame_size("vcodec", norm == PAL ? "720x576" : "720x480");
......@@ -4082,6 +4028,8 @@ static const OptionDef options[] = {
{ "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
{ "i", HAS_ARG, {(void*)opt_input_file}, "input file name", "filename" },
{ "y", OPT_BOOL, {(void*)&file_overwrite}, "overwrite output files" },
{ "c", HAS_ARG, {(void*)opt_codec}, "codec name", "codec" },
{ "codec", HAS_ARG, {(void*)opt_codec}, "codec name", "codec" },
{ "map", HAS_ARG | OPT_EXPERT, {(void*)opt_map}, "set input stream mapping", "file.stream[:syncfile.syncstream]" },
{ "map_metadata", HAS_ARG | OPT_EXPERT, {(void*)opt_map_metadata}, "set metadata information of outfile from infile",
"outfile[,metadata]:infile[,metadata]" },
......
doc/avconv.texi
View file @ 92f1940e
......@@ -97,6 +97,34 @@ input file name
@item -y
Overwrite output files.
@item -c[:@var{stream_type}][:@var{stream_index}] @var{codec}
@item -codec[:@var{stream_type}][:@var{stream_index}] @var{codec}
Select an encoder (when used before an output file) or a decoder (when used
before an input file) for one or more streams. @var{codec} is the name of a
decoder/encoder or a special value @code{copy} (output only) to indicate that
the stream is not to be reencoded.
@var{stream_type} may be 'v' for video, 'a' for audio, 's' for subtitle and 'd'
for data streams. @var{stream_index} is a global zero-based stream index if
@var{stream_type} isn't given, otherwise it counts only streams of the given
type. If @var{stream_index} is omitted, this option applies to all streams of
the given type or all streams of any type if @var{stream_type} is missing as
well (note that this only makes sense when all streams are of the same type or
@var{codec} is @code{copy}).
For example
@example
avconv -i INPUT -map 0 -c:v libx264 -c:a copy OUTPUT
@end example
encodes all video streams with libx264 and copies all audio streams.
For each stream, the last matching @code{c} option is applied, so
@example
avconv -i INPUT -map 0 -c copy -c:v:1 libx264 -c:a:137 libvorbis OUTPUT
@end example
will copy all the streams except the second video, which will be encoded with
libx264, and the 138th audio, which will be encoded with libvorbis.
@item -t @var{duration}
Restrict the transcoded/captured video sequence
to the duration specified in seconds.
......@@ -159,9 +187,6 @@ avconv -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
@item -dframes @var{number}
Set the number of data frames to record.
@item -scodec @var{codec}
Force subtitle codec ('copy' to copy stream).
@item -slang @var{code}
Set the ISO 639 language code (3 letters) of the current subtitle stream.
......@@ -282,8 +307,7 @@ It is of little use elsewise.
@item -bufsize @var{size}
Set video buffer verifier buffer size (in bits).
@item -vcodec @var{codec}
Force video codec to @var{codec}. Use the @code{copy} special value to
tell that the raw codec data must be copied as is.
Set the video codec. This is an alias for @code{-codec:v}.
@item -sameq
Use same quantizer as source (implies VBR).
......@@ -296,8 +320,8 @@ at the exact requested bitrate.
On pass 1, you may just deactivate audio and set output to null,
examples for Windows and Unix:
@example
avconv -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y NUL
avconv -i foo.mov -vcodec libxvid -pass 1 -an -f rawvideo -y /dev/null
avconv -i foo.mov -c:v libxvid -pass 1 -an -f rawvideo -y NUL
avconv -i foo.mov -c:v libxvid -pass 1 -an -f rawvideo -y /dev/null
@end example
@item -passlogfile @var{prefix}
......@@ -541,7 +565,7 @@ Show QP histogram.
@item -vbsf @var{bitstream_filter}
Bitstream filters available are "dump_extra", "remove_extra", "noise", "h264_mp4toannexb", "imxdump", "mjpegadump", "mjpeg2jpeg".
@example
avconv -i h264.mp4 -vcodec copy -vbsf h264_mp4toannexb -an out.h264
avconv -i h264.mp4 -c:v copy -vbsf h264_mp4toannexb -an out.h264
@end example
@item -force_key_frames @var{time}[,@var{time}...]
Force key frames at the specified timestamps, more precisely at the first
......@@ -571,8 +595,7 @@ and is mapped to the corresponding demuxer options.
@item -an
Disable audio recording.
@item -acodec @var{codec}
Force audio codec to @var{codec}. Use the @code{copy} special value to
specify that the raw codec data must be copied as is.
Set the audio codec. This is an alias for @code{-codec:a}.
@item -alang @var{code}
Set the ISO 639 language code (3 letters) of the current audio stream.
@end table
......@@ -612,7 +635,7 @@ Bitstream filters available are "dump_extra", "remove_extra", "noise", "mp3comp"
@table @option
@item -scodec @var{codec}
Force subtitle codec ('copy' to copy stream).
Set the subtitle codec. This is an alias for @code{-codec:s}.
@item -slang @var{code}
Set the ISO 639 language code (3 letters) of the current subtitle stream.
@item -sn
......@@ -620,7 +643,7 @@ Disable subtitle recording.
@item -sbsf @var{bitstream_filter}
Bitstream filters available are "mov2textsub", "text2movsub".
@example
avconv -i file.mov -an -vn -sbsf mov2textsub -scodec copy -f rawvideo sub.txt
avconv -i file.mov -an -vn -sbsf mov2textsub -c:s copy -f rawvideo sub.txt
@end example
@end table
......@@ -677,7 +700,7 @@ For example, to select the stream with index 2 from input file
index 6 from input @file{b.mov} (specified by the identifier "1:6"),
and copy them to the output file @file{out.mov}:
@example
avconv -i a.mov -i b.mov -vcodec copy -acodec copy -map 0:2 -map 1:6 out.mov
avconv -i a.mov -i b.mov -c copy -map 0:2 -map 1:6 out.mov
@end example
To select all video and the third audio stream from an input file:
......@@ -945,7 +968,7 @@ stream, in the order of the definition of output streams.
You can transcode decrypted VOBs:
@example
avconv -i snatch_1.vob -f avi -vcodec mpeg4 -b 800k -g 300 -bf 2 -acodec libmp3lame -ab 128k snatch.avi
avconv -i snatch_1.vob -f avi -c:v mpeg4 -b 800k -g 300 -bf 2 -c:a libmp3lame -ab 128k snatch.avi
@end example
This is a typical DVD ripping example; the input is a VOB file, the
......@@ -989,7 +1012,7 @@ only formats accepting a normal integer are suitable.
You can put many streams of the same type in the output:
@example
avconv -i test1.avi -i test2.avi -map 0.3 -map 0.2 -map 0.1 -map 0.0 -vcodec copy -acodec copy -vcodec copy -acodec copy test12.nut
avconv -i test1.avi -i test2.avi -map 0.3 -map 0.2 -map 0.1 -map 0.0 -c copy test12.nut
@end example
The resulting output file @file{test12.avi} will contain first four streams from
......
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