C++ (Cpp) FFmpegEncoderVerifyContainer Examples

Example #1

File: ffmpeg-encoder.c Project: MoochMcGee/mgba

bool FFmpegEncoderOpen(struct FFmpegEncoder* encoder, const char* outfile) {
	AVCodec* acodec = avcodec_find_encoder_by_name(encoder->audioCodec);
	AVCodec* vcodec = avcodec_find_encoder_by_name(encoder->videoCodec);
	if ((encoder->audioCodec && !acodec) || !vcodec || !FFmpegEncoderVerifyContainer(encoder)) {
		return false;
	}

	encoder->currentAudioSample = 0;
	encoder->currentAudioFrame = 0;
	encoder->currentVideoFrame = 0;
	encoder->nextAudioPts = 0;

	AVOutputFormat* oformat = av_guess_format(encoder->containerFormat, 0, 0);
#ifndef USE_LIBAV
	avformat_alloc_output_context2(&encoder->context, oformat, 0, outfile);
#else
	encoder->context = avformat_alloc_context();
	strncpy(encoder->context->filename, outfile, sizeof(encoder->context->filename));
	encoder->context->oformat = oformat;
#endif

	if (acodec) {
		encoder->audioStream = avformat_new_stream(encoder->context, acodec);
		encoder->audio = encoder->audioStream->codec;
		encoder->audio->bit_rate = encoder->audioBitrate;
		encoder->audio->channels = 2;
		encoder->audio->channel_layout = AV_CH_LAYOUT_STEREO;
		encoder->audio->sample_rate = encoder->sampleRate;
		encoder->audio->sample_fmt = encoder->sampleFormat;
		AVDictionary* opts = 0;
		av_dict_set(&opts, "strict", "-2", 0);
		if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
			encoder->audio->flags |= CODEC_FLAG_GLOBAL_HEADER;
		}
		avcodec_open2(encoder->audio, acodec, &opts);
		av_dict_free(&opts);
#if LIBAVCODEC_VERSION_MAJOR >= 55
		encoder->audioFrame = av_frame_alloc();
#else
		encoder->audioFrame = avcodec_alloc_frame();
#endif
		if (!encoder->audio->frame_size) {
			encoder->audio->frame_size = 1;
		}
		encoder->audioFrame->nb_samples = encoder->audio->frame_size;
		encoder->audioFrame->format = encoder->audio->sample_fmt;
		encoder->audioFrame->pts = 0;
		encoder->resampleContext = avresample_alloc_context();
		av_opt_set_int(encoder->resampleContext, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
		av_opt_set_int(encoder->resampleContext, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
		av_opt_set_int(encoder->resampleContext, "in_sample_rate", PREFERRED_SAMPLE_RATE, 0);
		av_opt_set_int(encoder->resampleContext, "out_sample_rate", encoder->sampleRate, 0);
		av_opt_set_int(encoder->resampleContext, "in_sample_fmt", AV_SAMPLE_FMT_S16, 0);
		av_opt_set_int(encoder->resampleContext, "out_sample_fmt", encoder->sampleFormat, 0);
		avresample_open(encoder->resampleContext);
		encoder->audioBufferSize = (encoder->audioFrame->nb_samples * PREFERRED_SAMPLE_RATE / encoder->sampleRate) * 4;
		encoder->audioBuffer = av_malloc(encoder->audioBufferSize);
		encoder->postaudioBufferSize = av_samples_get_buffer_size(0, encoder->audio->channels, encoder->audio->frame_size, encoder->audio->sample_fmt, 0);
		encoder->postaudioBuffer = av_malloc(encoder->postaudioBufferSize);
		avcodec_fill_audio_frame(encoder->audioFrame, encoder->audio->channels, encoder->audio->sample_fmt, (const uint8_t*) encoder->postaudioBuffer, encoder->postaudioBufferSize, 0);

		if (encoder->audio->codec->id == AV_CODEC_ID_AAC &&
			(strcasecmp(encoder->containerFormat, "mp4") ||
			strcasecmp(encoder->containerFormat, "m4v") ||
			strcasecmp(encoder->containerFormat, "mov"))) {
			// MP4 container doesn't support the raw ADTS AAC format that the encoder spits out
			encoder->absf = av_bitstream_filter_init("aac_adtstoasc");
		}
	}

	encoder->videoStream = avformat_new_stream(encoder->context, vcodec);
	encoder->video = encoder->videoStream->codec;
	encoder->video->bit_rate = encoder->videoBitrate;
	encoder->video->width = encoder->width;
	encoder->video->height = encoder->height;
	encoder->video->time_base = (AVRational) { VIDEO_TOTAL_LENGTH, GBA_ARM7TDMI_FREQUENCY };
	encoder->video->pix_fmt = encoder->pixFormat;
	encoder->video->gop_size = 60;
	encoder->video->max_b_frames = 3;
	if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
		encoder->video->flags |= CODEC_FLAG_GLOBAL_HEADER;
	}
	if (strcmp(vcodec->name, "libx264") == 0) {
		// Try to adaptively figure out when you can use a slower encoder
		if (encoder->width * encoder->height > 1000000) {
			av_opt_set(encoder->video->priv_data, "preset", "superfast", 0);
		} else if (encoder->width * encoder->height > 500000) {
			av_opt_set(encoder->video->priv_data, "preset", "veryfast", 0);
		} else {
			av_opt_set(encoder->video->priv_data, "preset", "faster", 0);
		}
		av_opt_set(encoder->video->priv_data, "tune", "zerolatency", 0);
	}
	avcodec_open2(encoder->video, vcodec, 0);
#if LIBAVCODEC_VERSION_MAJOR >= 55
	encoder->videoFrame = av_frame_alloc();
#else
	encoder->videoFrame = avcodec_alloc_frame();
#endif
	encoder->videoFrame->format = encoder->video->pix_fmt;
	encoder->videoFrame->width = encoder->video->width;
	encoder->videoFrame->height = encoder->video->height;
	encoder->videoFrame->pts = 0;
	encoder->scaleContext = sws_getContext(VIDEO_HORIZONTAL_PIXELS, VIDEO_VERTICAL_PIXELS,
#ifndef USE_LIBAV
		AV_PIX_FMT_0BGR32,
#else
		AV_PIX_FMT_BGR32,
#endif
		encoder->videoFrame->width, encoder->videoFrame->height, encoder->video->pix_fmt,
		SWS_POINT, 0, 0, 0);
	av_image_alloc(encoder->videoFrame->data, encoder->videoFrame->linesize, encoder->video->width, encoder->video->height, encoder->video->pix_fmt, 32);

	avio_open(&encoder->context->pb, outfile, AVIO_FLAG_WRITE);
	avformat_write_header(encoder->context, 0);

	return true;
}

Example #2

File: ffmpeg-encoder.c Project: tzlion/mgba

bool FFmpegEncoderOpen(struct FFmpegEncoder* encoder, const char* outfile) {
	AVCodec* acodec = avcodec_find_encoder_by_name(encoder->audioCodec);
	AVCodec* vcodec = avcodec_find_encoder_by_name(encoder->videoCodec);
	if ((encoder->audioCodec && !acodec) || !vcodec || !FFmpegEncoderVerifyContainer(encoder)) {
		return false;
	}

	encoder->currentAudioSample = 0;
	encoder->currentAudioFrame = 0;
	encoder->currentVideoFrame = 0;
	encoder->nextAudioPts = 0;

	AVOutputFormat* oformat = av_guess_format(encoder->containerFormat, 0, 0);
#ifndef USE_LIBAV
	avformat_alloc_output_context2(&encoder->context, oformat, 0, outfile);
#else
	encoder->context = avformat_alloc_context();
	strncpy(encoder->context->filename, outfile, sizeof(encoder->context->filename) - 1);
	encoder->context->filename[sizeof(encoder->context->filename) - 1] = '\0';
	encoder->context->oformat = oformat;
#endif

	if (acodec) {
#ifdef FFMPEG_USE_CODECPAR
		encoder->audioStream = avformat_new_stream(encoder->context, NULL);
		encoder->audio = avcodec_alloc_context3(acodec);
#else
		encoder->audioStream = avformat_new_stream(encoder->context, acodec);
		encoder->audio = encoder->audioStream->codec;
#endif
		encoder->audio->bit_rate = encoder->audioBitrate;
		encoder->audio->channels = 2;
		encoder->audio->channel_layout = AV_CH_LAYOUT_STEREO;
		encoder->audio->sample_rate = encoder->sampleRate;
		encoder->audio->sample_fmt = encoder->sampleFormat;
		AVDictionary* opts = 0;
		av_dict_set(&opts, "strict", "-2", 0);
		if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
#ifdef AV_CODEC_FLAG_GLOBAL_HEADER
			encoder->audio->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
#else
			encoder->audio->flags |= CODEC_FLAG_GLOBAL_HEADER;
#endif
		}
		avcodec_open2(encoder->audio, acodec, &opts);
		av_dict_free(&opts);
#if LIBAVCODEC_VERSION_MAJOR >= 55
		encoder->audioFrame = av_frame_alloc();
#else
		encoder->audioFrame = avcodec_alloc_frame();
#endif
		if (!encoder->audio->frame_size) {
			encoder->audio->frame_size = 1;
		}
		encoder->audioFrame->nb_samples = encoder->audio->frame_size;
		encoder->audioFrame->format = encoder->audio->sample_fmt;
		encoder->audioFrame->pts = 0;
#ifdef USE_LIBAVRESAMPLE
		encoder->resampleContext = avresample_alloc_context();
		av_opt_set_int(encoder->resampleContext, "in_channel_layout", AV_CH_LAYOUT_STEREO, 0);
		av_opt_set_int(encoder->resampleContext, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);
		av_opt_set_int(encoder->resampleContext, "in_sample_rate", PREFERRED_SAMPLE_RATE, 0);
		av_opt_set_int(encoder->resampleContext, "out_sample_rate", encoder->sampleRate, 0);
		av_opt_set_int(encoder->resampleContext, "in_sample_fmt", AV_SAMPLE_FMT_S16, 0);
		av_opt_set_int(encoder->resampleContext, "out_sample_fmt", encoder->sampleFormat, 0);
		avresample_open(encoder->resampleContext);
#else
		encoder->resampleContext = swr_alloc_set_opts(NULL, AV_CH_LAYOUT_STEREO, encoder->sampleFormat, encoder->sampleRate,
		                                              AV_CH_LAYOUT_STEREO, AV_SAMPLE_FMT_S16, PREFERRED_SAMPLE_RATE, 0, NULL);
		swr_init(encoder->resampleContext);
#endif
		encoder->audioBufferSize = (encoder->audioFrame->nb_samples * PREFERRED_SAMPLE_RATE / encoder->sampleRate) * 4;
		encoder->audioBuffer = av_malloc(encoder->audioBufferSize);
		encoder->postaudioBufferSize = av_samples_get_buffer_size(0, encoder->audio->channels, encoder->audio->frame_size, encoder->audio->sample_fmt, 0);
		encoder->postaudioBuffer = av_malloc(encoder->postaudioBufferSize);
		avcodec_fill_audio_frame(encoder->audioFrame, encoder->audio->channels, encoder->audio->sample_fmt, (const uint8_t*) encoder->postaudioBuffer, encoder->postaudioBufferSize, 0);

		if (encoder->audio->codec->id == AV_CODEC_ID_AAC &&
		    (strcasecmp(encoder->containerFormat, "mp4") ||
		        strcasecmp(encoder->containerFormat, "m4v") ||
		        strcasecmp(encoder->containerFormat, "mov"))) {
			// MP4 container doesn't support the raw ADTS AAC format that the encoder spits out
#ifdef FFMPEG_USE_NEW_BSF
			av_bsf_alloc(av_bsf_get_by_name("aac_adtstoasc"), &encoder->absf);
			avcodec_parameters_from_context(encoder->absf->par_in, encoder->audio);
			av_bsf_init(encoder->absf);
#else
			encoder->absf = av_bitstream_filter_init("aac_adtstoasc");
#endif
		}
#ifdef FFMPEG_USE_CODECPAR
		avcodec_parameters_from_context(encoder->audioStream->codecpar, encoder->audio);
#endif
	}

#ifdef FFMPEG_USE_CODECPAR
	encoder->videoStream = avformat_new_stream(encoder->context, NULL);
	encoder->video = avcodec_alloc_context3(vcodec);
#else
	encoder->videoStream = avformat_new_stream(encoder->context, vcodec);
	encoder->video = encoder->videoStream->codec;
#endif
	encoder->video->bit_rate = encoder->videoBitrate;
	encoder->video->width = encoder->width;
	encoder->video->height = encoder->height;
	encoder->video->time_base = (AVRational) { VIDEO_TOTAL_LENGTH, GBA_ARM7TDMI_FREQUENCY };
	encoder->video->pix_fmt = encoder->pixFormat;
	encoder->video->gop_size = 60;
	encoder->video->max_b_frames = 3;
	if (encoder->context->oformat->flags & AVFMT_GLOBALHEADER) {
#ifdef AV_CODEC_FLAG_GLOBAL_HEADER
		encoder->video->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
#else
		encoder->video->flags |= CODEC_FLAG_GLOBAL_HEADER;
#endif
	}

	if (encoder->video->codec->id == AV_CODEC_ID_H264 &&
	    (strcasecmp(encoder->containerFormat, "mp4") ||
	        strcasecmp(encoder->containerFormat, "m4v") ||
	        strcasecmp(encoder->containerFormat, "mov"))) {
		// QuickTime and a few other things require YUV420
		encoder->video->pix_fmt = AV_PIX_FMT_YUV420P;
	}

	if (strcmp(vcodec->name, "libx264") == 0) {
		// Try to adaptively figure out when you can use a slower encoder
		if (encoder->width * encoder->height > 1000000) {
			av_opt_set(encoder->video->priv_data, "preset", "superfast", 0);
		} else if (encoder->width * encoder->height > 500000) {
			av_opt_set(encoder->video->priv_data, "preset", "veryfast", 0);
		} else {
			av_opt_set(encoder->video->priv_data, "preset", "faster", 0);
		}
		if (encoder->videoBitrate == 0) {
			av_opt_set(encoder->video->priv_data, "crf", "0", 0);
			encoder->video->pix_fmt = AV_PIX_FMT_YUV444P;
		}
	}

	avcodec_open2(encoder->video, vcodec, 0);
#if LIBAVCODEC_VERSION_MAJOR >= 55
	encoder->videoFrame = av_frame_alloc();
#else
	encoder->videoFrame = avcodec_alloc_frame();
#endif
	encoder->videoFrame->format = encoder->video->pix_fmt;
	encoder->videoFrame->width = encoder->video->width;
	encoder->videoFrame->height = encoder->video->height;
	encoder->videoFrame->pts = 0;
	_ffmpegSetVideoDimensions(&encoder->d, encoder->iwidth, encoder->iheight);
	av_image_alloc(encoder->videoFrame->data, encoder->videoFrame->linesize, encoder->video->width, encoder->video->height, encoder->video->pix_fmt, 32);
#ifdef FFMPEG_USE_CODECPAR
	avcodec_parameters_from_context(encoder->videoStream->codecpar, encoder->video);
#endif

	if (avio_open(&encoder->context->pb, outfile, AVIO_FLAG_WRITE) < 0) {
		return false;
	}
	return avformat_write_header(encoder->context, 0) >= 0;
}