Min kunds webhotell (ballou) låter mig inte lägga in ett tredjeparts program såsom ffmpeg.exe. Testat att söka på google efter: ffmpeg c#? Just det där med dll tror jag är första träffen ;) Hitta en dll som wrappar Cpp library för ffmpeg till C# Nu vet jag inte riktigt vilken säkerhetsnivå ballou har, men.. Du ska inte göra ett försök och se ifall du itne kan ta ta källkoden till ffmpeg.exe och se om den går att modifiera lite till att bli c++/cli? Isf. kan du ju få en dll som till hälften är vanlig c++ (ffmpeg) och till hälften .net (en wrapper som gör samma sak som ffmpeg.exe, fast har .net-interface istället för commandline) Hmm.. Verkar inte som den går att kompilera managed.. Utan wrappern verkar vara enda sättet... Du verkar ju bra på Cpp > C#. Tror inte det är så enkelt. Och nej, men idé var inte att kompilera rubbet som managed, bara att helt enkelt anropa main-metoden med managed cpp, resten kompileras med unmanaged som vanligt Eftersom programmet är skrivet för linux verkar det som man måste kompilera det via MingW / MSYSflv encoder för C#
Detta krävs för att konvertera inkommande videoforamt till flash format (flv).
Jag måste med andra ord inkapsla kodning till flv i min .net applikation. Nån som vet om det finns flv kodare för c#?
edit: nån som veto det går att köra ffmpeg i som dll?Sv: flv encoder för C#
Sv:flv encoder för C#
SharpFfmpeg heter den. men hittar ingen som helst doc för den :/
I startup klassen för konsolversionen av ffmpeg så finns det en metod av_encode som används för att koda film. Verkar som alla metoder som används där finns i wrappen. Men utan docs och utan avancerade Cpp-kunskaper lär det vara omöjligt att konvertera den metoden till C#
/*
* The following code is the main loop of the file converter
*/
static int av_encode(AVFormatContext **output_files,
int nb_output_files,
AVFormatContext **input_files,
int nb_input_files,
AVStreamMap *stream_maps, int nb_stream_maps)
{
int ret, i, j, k, n, nb_istreams = 0, nb_ostreams = 0;
AVFormatContext *is, *os;
AVCodecContext *codec, *icodec;
AVOutputStream *ost, **ost_table = NULL;
AVInputStream *ist, **ist_table = NULL;
AVInputFile *file_table;
int key;
int want_sdp = 1;
file_table= (AVInputFile*) av_mallocz(nb_input_files * sizeof(AVInputFile));
if (!file_table)
goto fail;
/* input stream init */
j = 0;
for(i=0;i<nb_input_files;i++) {
is = input_files[i];
file_table[i].ist_index = j;
file_table[i].nb_streams = is->nb_streams;
j += is->nb_streams;
}
nb_istreams = j;
ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
if (!ist_table)
goto fail;
for(i=0;i<nb_istreams;i++) {
ist = av_mallocz(sizeof(AVInputStream));
if (!ist)
goto fail;
ist_table[i] = ist;
}
j = 0;
for(i=0;i<nb_input_files;i++) {
is = input_files[i];
for(k=0;k<is->nb_streams;k++) {
ist = ist_table[j++];
ist->st = is->streams[k];
ist->file_index = i;
ist->index = k;
ist->discard = 1; /* the stream is discarded by default
(changed later) */
if (ist->st->codec->rate_emu) {
ist->start = av_gettime();
ist->frame = 0;
}
}
}
/* output stream init */
nb_ostreams = 0;
for(i=0;i<nb_output_files;i++) {
os = output_files[i];
if (!os->nb_streams) {
fprintf(stderr, "Output file does not contain any stream\n");
exit(1);
}
nb_ostreams += os->nb_streams;
}
if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
fprintf(stderr, "Number of stream maps must match number of output streams\n");
exit(1);
}
/* Sanity check the mapping args -- do the input files & streams exist? */
for(i=0;i<nb_stream_maps;i++) {
int fi = stream_maps[i].file_index;
int si = stream_maps[i].stream_index;
if (fi < 0 || fi > nb_input_files - 1 ||
si < 0 || si > file_table[fi].nb_streams - 1) {
fprintf(stderr,"Could not find input stream #%d.%d\n", fi, si);
exit(1);
}
fi = stream_maps[i].sync_file_index;
si = stream_maps[i].sync_stream_index;
if (fi < 0 || fi > nb_input_files - 1 ||
si < 0 || si > file_table[fi].nb_streams - 1) {
fprintf(stderr,"Could not find sync stream #%d.%d\n", fi, si);
exit(1);
}
}
ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
if (!ost_table)
goto fail;
for(i=0;i<nb_ostreams;i++) {
ost = av_mallocz(sizeof(AVOutputStream));
if (!ost)
goto fail;
ost_table[i] = ost;
}
n = 0;
for(k=0;k<nb_output_files;k++) {
os = output_files[k];
for(i=0;i<os->nb_streams;i++) {
int found;
ost = ost_table[n++];
ost->file_index = k;
ost->index = i;
ost->st = os->streams[i];
if (nb_stream_maps > 0) {
ost->source_index = file_table[stream_maps[n-1].file_index].ist_index +
stream_maps[n-1].stream_index;
/* Sanity check that the stream types match */
if (ist_table[ost->source_index]->st->codec->codec_type != ost->st->codec->codec_type) {
fprintf(stderr, "Codec type mismatch for mapping #%d.%d -> #%d.%d\n",
stream_maps[n-1].file_index, stream_maps[n-1].stream_index,
ost->file_index, ost->index);
exit(1);
}
} else {
/* get corresponding input stream index : we select the first one with the right type */
found = 0;
for(j=0;j<nb_istreams;j++) {
ist = ist_table[j];
if (ist->discard &&
ist->st->codec->codec_type == ost->st->codec->codec_type) {
ost->source_index = j;
found = 1;
break;
}
}
if (!found) {
/* try again and reuse existing stream */
for(j=0;j<nb_istreams;j++) {
ist = ist_table[j];
if (ist->st->codec->codec_type == ost->st->codec->codec_type) {
ost->source_index = j;
found = 1;
}
}
if (!found) {
fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
ost->file_index, ost->index);
exit(1);
}
}
}
ist = ist_table[ost->source_index];
ist->discard = 0;
ost->sync_ist = (nb_stream_maps > 0) ?
ist_table[file_table[stream_maps[n-1].sync_file_index].ist_index +
stream_maps[n-1].sync_stream_index] : ist;
}
}
/* for each output stream, we compute the right encoding parameters */
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
os = output_files[ost->file_index];
ist = ist_table[ost->source_index];
codec = ost->st->codec;
icodec = ist->st->codec;
if (!ost->st->language[0])
av_strlcpy(ost->st->language, ist->st->language,
sizeof(ost->st->language));
if (ost->st->stream_copy) {
/* if stream_copy is selected, no need to decode or encode */
codec->codec_id = icodec->codec_id;
codec->codec_type = icodec->codec_type;
if(!codec->codec_tag){
if( !os->oformat->codec_tag
|| av_codec_get_id (os->oformat->codec_tag, icodec->codec_tag) > 0
|| av_codec_get_tag(os->oformat->codec_tag, icodec->codec_id) <= 0)
codec->codec_tag = icodec->codec_tag;
}
codec->bit_rate = icodec->bit_rate;
codec->extradata= icodec->extradata;
codec->extradata_size= icodec->extradata_size;
if(av_q2d(icodec->time_base) > av_q2d(ist->st->time_base) && av_q2d(ist->st->time_base) < 1.0/1000)
codec->time_base = icodec->time_base;
else
codec->time_base = ist->st->time_base;
switch(codec->codec_type) {
case CODEC_TYPE_AUDIO:
codec->sample_rate = icodec->sample_rate;
codec->channels = icodec->channels;
codec->frame_size = icodec->frame_size;
codec->block_align= icodec->block_align;
if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
codec->block_align= 0;
break;
case CODEC_TYPE_VIDEO:
if(using_vhook) {
fprintf(stderr,"-vcodec copy and -vhook are incompatible (frames are not decoded)\n");
exit(1);
}
codec->pix_fmt = icodec->pix_fmt;
codec->width = icodec->width;
codec->height = icodec->height;
codec->has_b_frames = icodec->has_b_frames;
break;
case CODEC_TYPE_SUBTITLE:
break;
default:
abort();
}
} else {
switch(codec->codec_type) {
case CODEC_TYPE_AUDIO:
if (av_fifo_init(&ost->fifo, 2 * MAX_AUDIO_PACKET_SIZE))
goto fail;
if (codec->channels == icodec->channels &&
codec->sample_rate == icodec->sample_rate) {
ost->audio_resample = 0;
} else {
if (codec->channels != icodec->channels &&
(icodec->codec_id == CODEC_ID_AC3 ||
icodec->codec_id == CODEC_ID_DTS)) {
/* Special case for 5:1 AC3 and DTS input */
/* and mono or stereo output */
/* Request specific number of channels */
icodec->channels = codec->channels;
if (codec->sample_rate == icodec->sample_rate)
ost->audio_resample = 0;
else {
ost->audio_resample = 1;
}
} else {
ost->audio_resample = 1;
}
}
if(audio_sync_method>1)
ost->audio_resample = 1;
if(ost->audio_resample){
ost->resample = audio_resample_init(codec->channels, icodec->channels,
codec->sample_rate, icodec->sample_rate);
if(!ost->resample){
printf("Can't resample. Aborting.\n");
abort();
}
}
ist->decoding_needed = 1;
ost->encoding_needed = 1;
break;
case CODEC_TYPE_VIDEO:
ost->video_crop = ((frame_leftBand + frame_rightBand + frame_topBand + frame_bottomBand) != 0);
ost->video_pad = ((frame_padleft + frame_padright + frame_padtop + frame_padbottom) != 0);
ost->video_resample = ((codec->width != icodec->width -
(frame_leftBand + frame_rightBand) +
(frame_padleft + frame_padright)) ||
(codec->height != icodec->height -
(frame_topBand + frame_bottomBand) +
(frame_padtop + frame_padbottom)) ||
(codec->pix_fmt != icodec->pix_fmt));
if (ost->video_crop) {
ost->topBand = frame_topBand;
ost->leftBand = frame_leftBand;
}
if (ost->video_pad) {
ost->padtop = frame_padtop;
ost->padleft = frame_padleft;
ost->padbottom = frame_padbottom;
ost->padright = frame_padright;
if (!ost->video_resample) {
avcodec_get_frame_defaults(&ost->pict_tmp);
if( avpicture_alloc( (AVPicture*)&ost->pict_tmp, codec->pix_fmt,
codec->width, codec->height ) )
goto fail;
}
}
if (ost->video_resample) {
avcodec_get_frame_defaults(&ost->pict_tmp);
if( avpicture_alloc( (AVPicture*)&ost->pict_tmp, codec->pix_fmt,
codec->width, codec->height ) ) {
fprintf(stderr, "Cannot allocate temp picture, check pix fmt\n");
exit(1);
}
sws_flags = av_get_int(sws_opts, "sws_flags", NULL);
ost->img_resample_ctx = sws_getContext(
icodec->width - (frame_leftBand + frame_rightBand),
icodec->height - (frame_topBand + frame_bottomBand),
icodec->pix_fmt,
codec->width - (frame_padleft + frame_padright),
codec->height - (frame_padtop + frame_padbottom),
codec->pix_fmt,
sws_flags, NULL, NULL, NULL);
if (ost->img_resample_ctx == NULL) {
fprintf(stderr, "Cannot get resampling context\n");
exit(1);
}
ost->resample_height = icodec->height - (frame_topBand + frame_bottomBand);
}
ost->encoding_needed = 1;
ist->decoding_needed = 1;
break;
case CODEC_TYPE_SUBTITLE:
ost->encoding_needed = 1;
ist->decoding_needed = 1;
break;
default:
abort();
break;
}
/* two pass mode */
if (ost->encoding_needed &&
(codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
char logfilename[1024];
FILE *f;
int size;
char *logbuffer;
snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
pass_logfilename ?
pass_logfilename : DEFAULT_PASS_LOGFILENAME, i);
if (codec->flags & CODEC_FLAG_PASS1) {
f = fopen(logfilename, "w");
if (!f) {
perror(logfilename);
exit(1);
}
ost->logfile = f;
} else {
/* read the log file */
f = fopen(logfilename, "r");
if (!f) {
perror(logfilename);
exit(1);
}
fseek(f, 0, SEEK_END);
size = ftell(f);
fseek(f, 0, SEEK_SET);
logbuffer = av_malloc(size + 1);
if (!logbuffer) {
fprintf(stderr, "Could not allocate log buffer\n");
exit(1);
}
size = fread(logbuffer, 1, size, f);
fclose(f);
logbuffer[size] = '\0';
codec->stats_in = logbuffer;
}
}
}
if(codec->codec_type == CODEC_TYPE_VIDEO){
int size= codec->width * codec->height;
bit_buffer_size= FFMAX(bit_buffer_size, 4*size);
}
}
if (!bit_buffer)
bit_buffer = av_malloc(bit_buffer_size);
if (!bit_buffer)
goto fail;
/* dump the file output parameters - cannot be done before in case
of stream copy */
for(i=0;i<nb_output_files;i++) {
dump_format(output_files[i], i, output_files[i]->filename, 1);
}
/* dump the stream mapping */
if (verbose >= 0) {
fprintf(stderr, "Stream mapping:\n");
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
fprintf(stderr, " Stream #%d.%d -> #%d.%d",
ist_table[ost->source_index]->file_index,
ist_table[ost->source_index]->index,
ost->file_index,
ost->index);
if (ost->sync_ist != ist_table[ost->source_index])
fprintf(stderr, " [sync #%d.%d]",
ost->sync_ist->file_index,
ost->sync_ist->index);
fprintf(stderr, "\n");
}
}
/* open each encoder */
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
if (ost->encoding_needed) {
AVCodec *codec;
codec = avcodec_find_encoder(ost->st->codec->codec_id);
if (!codec) {
fprintf(stderr, "Unsupported codec for output stream #%d.%d\n",
ost->file_index, ost->index);
exit(1);
}
if (avcodec_open(ost->st->codec, codec) < 0) {
fprintf(stderr, "Error while opening codec for output stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height\n",
ost->file_index, ost->index);
exit(1);
}
extra_size += ost->st->codec->extradata_size;
}
}
/* open each decoder */
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
if (ist->decoding_needed) {
AVCodec *codec;
codec = avcodec_find_decoder(ist->st->codec->codec_id);
if (!codec) {
fprintf(stderr, "Unsupported codec (id=%d) for input stream #%d.%d\n",
ist->st->codec->codec_id, ist->file_index, ist->index);
exit(1);
}
if (avcodec_open(ist->st->codec, codec) < 0) {
fprintf(stderr, "Error while opening codec for input stream #%d.%d\n",
ist->file_index, ist->index);
exit(1);
}
//if (ist->st->codec->codec_type == CODEC_TYPE_VIDEO)
// ist->st->codec->flags |= CODEC_FLAG_REPEAT_FIELD;
}
}
/* init pts */
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
is = input_files[ist->file_index];
ist->pts = 0;
ist->next_pts=0;
if( input_files_ts_offset[ist->file_index] != -is->start_time
&& !(is->start_time == AV_NOPTS_VALUE && input_files_ts_offset[ist->file_index]==0))
ist->next_pts= AV_NOPTS_VALUE;
ist->is_start = 1;
}
/* set meta data information from input file if required */
for (i=0;i<nb_meta_data_maps;i++) {
AVFormatContext *out_file;
AVFormatContext *in_file;
int out_file_index = meta_data_maps[i].out_file;
int in_file_index = meta_data_maps[i].in_file;
if ( out_file_index < 0 || out_file_index >= nb_output_files ) {
fprintf(stderr, "Invalid output file index %d map_meta_data(%d,%d)\n", out_file_index, out_file_index, in_file_index);
ret = AVERROR(EINVAL);
goto fail;
}
if ( in_file_index < 0 || in_file_index >= nb_input_files ) {
fprintf(stderr, "Invalid input file index %d map_meta_data(%d,%d)\n", in_file_index, out_file_index, in_file_index);
ret = AVERROR(EINVAL);
goto fail;
}
out_file = output_files[out_file_index];
in_file = input_files[in_file_index];
strcpy(out_file->title, in_file->title);
strcpy(out_file->author, in_file->author);
strcpy(out_file->copyright, in_file->copyright);
strcpy(out_file->comment, in_file->comment);
strcpy(out_file->album, in_file->album);
out_file->year = in_file->year;
out_file->track = in_file->track;
strcpy(out_file->genre, in_file->genre);
}
/* open files and write file headers */
for(i=0;i<nb_output_files;i++) {
os = output_files[i];
if (av_write_header(os) < 0) {
fprintf(stderr, "Could not write header for output file #%d (incorrect codec parameters ?)\n", i);
ret = AVERROR(EINVAL);
goto fail;
}
if (strcmp(output_files[i]->oformat->name, "rtp")) {
want_sdp = 0;
}
}
if (want_sdp) {
print_sdp(output_files, nb_output_files);
}
if ( !using_stdin && verbose >= 0) {
fprintf(stderr, "Press [q] to stop encoding\n");
url_set_interrupt_cb(decode_interrupt_cb);
}
term_init();
key = -1;
timer_start = av_gettime();
for(; received_sigterm == 0;) {
int file_index, ist_index;
AVPacket pkt;
double ipts_min;
double opts_min;
redo:
ipts_min= 1e100;
opts_min= 1e100;
/* if 'q' pressed, exits */
if (!using_stdin) {
if (q_pressed)
break;
/* read_key() returns 0 on EOF */
key = read_key();
if (key == 'q')
break;
}
/* select the stream that we must read now by looking at the
smallest output pts */
file_index = -1;
for(i=0;i<nb_ostreams;i++) {
double ipts, opts;
ost = ost_table[i];
os = output_files[ost->file_index];
ist = ist_table[ost->source_index];
if(ost->st->codec->codec_type == CODEC_TYPE_VIDEO)
opts = ost->sync_opts * av_q2d(ost->st->codec->time_base);
else
opts = ost->st->pts.val * av_q2d(ost->st->time_base);
ipts = (double)ist->pts;
if (!file_table[ist->file_index].eof_reached){
if(ipts < ipts_min) {
ipts_min = ipts;
if(input_sync ) file_index = ist->file_index;
}
if(opts < opts_min) {
opts_min = opts;
if(!input_sync) file_index = ist->file_index;
}
}
if(ost->frame_number >= max_frames[ost->st->codec->codec_type]){
file_index= -1;
break;
}
}
/* if none, if is finished */
if (file_index < 0) {
break;
}
/* finish if recording time exhausted */
if (recording_time > 0 && opts_min >= (recording_time / 1000000.0))
break;
/* finish if limit size exhausted */
if (limit_filesize != 0 && limit_filesize < url_ftell(&output_files[0]->pb))
break;
/* read a frame from it and output it in the fifo */
is = input_files[file_index];
if (av_read_frame(is, &pkt) < 0) {
file_table[file_index].eof_reached = 1;
if (opt_shortest)
break;
else
continue;
}
if (do_pkt_dump) {
av_pkt_dump_log(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump);
}
/* the following test is needed in case new streams appear
dynamically in stream : we ignore them */
if (pkt.stream_index >= file_table[file_index].nb_streams)
goto discard_packet;
ist_index = file_table[file_index].ist_index + pkt.stream_index;
ist = ist_table[ist_index];
if (ist->discard)
goto discard_packet;
if (pkt.dts != AV_NOPTS_VALUE)
pkt.dts += av_rescale_q(input_files_ts_offset[ist->file_index], AV_TIME_BASE_Q, ist->st->time_base);
if (pkt.pts != AV_NOPTS_VALUE)
pkt.pts += av_rescale_q(input_files_ts_offset[ist->file_index], AV_TIME_BASE_Q, ist->st->time_base);
// fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n", ist->next_pts, pkt.dts, input_files_ts_offset[ist->file_index], ist->st->codec->codec_type);
if (pkt.dts != AV_NOPTS_VALUE && ist->next_pts != AV_NOPTS_VALUE) {
int64_t pkt_dts= av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
int64_t delta= pkt_dts - ist->next_pts;
if((FFABS(delta) > 1LL*dts_delta_threshold*AV_TIME_BASE || pkt_dts+1<ist->pts)&& !copy_ts){
input_files_ts_offset[ist->file_index]-= delta;
if (verbose > 2)
fprintf(stderr, "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n", delta, input_files_ts_offset[ist->file_index]);
pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
if(pkt.pts != AV_NOPTS_VALUE)
pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
}
}
//fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size);
if (output_packet(ist, ist_index, ost_table, nb_ostreams, &pkt) < 0) {
if (verbose >= 0)
fprintf(stderr, "Error while decoding stream #%d.%d\n",
ist->file_index, ist->index);
av_free_packet(&pkt);
goto redo;
}
discard_packet:
av_free_packet(&pkt);
/* dump report by using the output first video and audio streams */
print_report(output_files, ost_table, nb_ostreams, 0);
}
/* at the end of stream, we must flush the decoder buffers */
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
if (ist->decoding_needed) {
output_packet(ist, i, ost_table, nb_ostreams, NULL);
}
}
term_exit();
/* write the trailer if needed and close file */
for(i=0;i<nb_output_files;i++) {
os = output_files[i];
av_write_trailer(os);
}
/* dump report by using the first video and audio streams */
print_report(output_files, ost_table, nb_ostreams, 1);
/* close each encoder */
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
if (ost->encoding_needed) {
av_freep(&ost->st->codec->stats_in);
avcodec_close(ost->st->codec);
}
}
/* close each decoder */
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
if (ist->decoding_needed) {
avcodec_close(ist->st->codec);
}
}
/* finished ! */
ret = 0;
fail1:
av_freep(&bit_buffer);
av_free(file_table);
if (ist_table) {
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
av_free(ist);
}
av_free(ist_table);
}
if (ost_table) {
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
if (ost) {
if (ost->logfile) {
fclose(ost->logfile);
ost->logfile = NULL;
}
av_fifo_free(&ost->fifo); /* works even if fifo is not
initialized but set to zero */
av_free(ost->pict_tmp.data[0]);
if (ost->video_resample)
sws_freeContext(ost->img_resample_ctx);
if (ost->audio_resample)
audio_resample_close(ost->resample);
av_free(ost);
}
}
av_free(ost_table);
}
return ret;
fail:
ret = AVERROR(ENOMEM);
goto fail1;
}
Sv: flv encoder för C#
Sv:flv encoder för C#
Sv:flv encoder för C#
Skulle det inte gå att göra om Cpp projektet från command line till ett lib, helt enkelt byta ut main metoden till en vanlig metod.
Sedan kompilera den unmanaged och sedan fixa en wrapper precis som de gjort med SharpFfmpegSv: flv encoder för C#
Sv:flv encoder för C#