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synced 2024-09-10 09:31:06 +02:00
examples/transcode_aac: convert to codecpar
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a9e1f2cc61
commit
ac6d53589f
@ -61,6 +61,7 @@ static int open_input_file(const char *filename,
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AVFormatContext **input_format_context,
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AVCodecContext **input_codec_context)
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{
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AVCodecContext *avctx;
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AVCodec *input_codec;
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int error;
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@ -90,23 +91,39 @@ static int open_input_file(const char *filename,
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}
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/** Find a decoder for the audio stream. */
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if (!(input_codec = avcodec_find_decoder((*input_format_context)->streams[0]->codec->codec_id))) {
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if (!(input_codec = avcodec_find_decoder((*input_format_context)->streams[0]->codecpar->codec_id))) {
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fprintf(stderr, "Could not find input codec\n");
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avformat_close_input(input_format_context);
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return AVERROR_EXIT;
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}
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/** allocate a new decoding context */
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avctx = avcodec_alloc_context3(input_codec);
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if (!avctx) {
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fprintf(stderr, "Could not allocate a decoding context\n");
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avformat_close_input(input_format_context);
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return AVERROR(ENOMEM);
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}
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/** initialize the stream parameters with demuxer information */
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error = avcodec_parameters_to_context(avctx, (*input_format_context)->streams[0]->codecpar);
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if (error < 0) {
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avformat_close_input(input_format_context);
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avcodec_free_context(&avctx);
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return error;
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}
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/** Open the decoder for the audio stream to use it later. */
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if ((error = avcodec_open2((*input_format_context)->streams[0]->codec,
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input_codec, NULL)) < 0) {
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if ((error = avcodec_open2(avctx, input_codec, NULL)) < 0) {
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fprintf(stderr, "Could not open input codec (error '%s')\n",
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get_error_text(error));
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avcodec_free_context(&avctx);
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avformat_close_input(input_format_context);
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return error;
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}
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/** Save the decoder context for easier access later. */
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*input_codec_context = (*input_format_context)->streams[0]->codec;
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*input_codec_context = avctx;
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return 0;
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}
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@ -121,6 +138,7 @@ static int open_output_file(const char *filename,
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AVFormatContext **output_format_context,
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AVCodecContext **output_codec_context)
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{
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AVCodecContext *avctx = NULL;
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AVIOContext *output_io_context = NULL;
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AVStream *stream = NULL;
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AVCodec *output_codec = NULL;
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@ -160,27 +178,31 @@ static int open_output_file(const char *filename,
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}
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/** Create a new audio stream in the output file container. */
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if (!(stream = avformat_new_stream(*output_format_context, output_codec))) {
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if (!(stream = avformat_new_stream(*output_format_context, NULL))) {
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fprintf(stderr, "Could not create new stream\n");
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error = AVERROR(ENOMEM);
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goto cleanup;
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}
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/** Save the encoder context for easier access later. */
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*output_codec_context = stream->codec;
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avctx = avcodec_alloc_context3(output_codec);
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if (!avctx) {
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fprintf(stderr, "Could not allocate an encoding context\n");
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error = AVERROR(ENOMEM);
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goto cleanup;
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}
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/**
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* Set the basic encoder parameters.
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* The input file's sample rate is used to avoid a sample rate conversion.
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*/
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(*output_codec_context)->channels = OUTPUT_CHANNELS;
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(*output_codec_context)->channel_layout = av_get_default_channel_layout(OUTPUT_CHANNELS);
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(*output_codec_context)->sample_rate = input_codec_context->sample_rate;
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(*output_codec_context)->sample_fmt = output_codec->sample_fmts[0];
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(*output_codec_context)->bit_rate = OUTPUT_BIT_RATE;
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avctx->channels = OUTPUT_CHANNELS;
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avctx->channel_layout = av_get_default_channel_layout(OUTPUT_CHANNELS);
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avctx->sample_rate = input_codec_context->sample_rate;
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avctx->sample_fmt = output_codec->sample_fmts[0];
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avctx->bit_rate = OUTPUT_BIT_RATE;
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/** Allow the use of the experimental AAC encoder */
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(*output_codec_context)->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
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avctx->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
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/** Set the sample rate for the container. */
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stream->time_base.den = input_codec_context->sample_rate;
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@ -191,18 +213,28 @@ static int open_output_file(const char *filename,
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* Mark the encoder so that it behaves accordingly.
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*/
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if ((*output_format_context)->oformat->flags & AVFMT_GLOBALHEADER)
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(*output_codec_context)->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
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avctx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
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/** Open the encoder for the audio stream to use it later. */
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if ((error = avcodec_open2(*output_codec_context, output_codec, NULL)) < 0) {
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if ((error = avcodec_open2(avctx, output_codec, NULL)) < 0) {
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fprintf(stderr, "Could not open output codec (error '%s')\n",
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get_error_text(error));
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goto cleanup;
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}
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error = avcodec_parameters_from_context(stream->codecpar, avctx);
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if (error < 0) {
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fprintf(stderr, "Could not initialize stream parameters\n");
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goto cleanup;
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}
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/** Save the encoder context for easier access later. */
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*output_codec_context = avctx;
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return 0;
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cleanup:
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avcodec_free_context(&avctx);
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avio_close((*output_format_context)->pb);
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avformat_free_context(*output_format_context);
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*output_format_context = NULL;
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@ -773,13 +805,13 @@ cleanup:
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avresample_free(&resample_context);
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}
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if (output_codec_context)
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avcodec_close(output_codec_context);
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avcodec_free_context(&output_codec_context);
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if (output_format_context) {
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avio_close(output_format_context->pb);
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avformat_free_context(output_format_context);
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}
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if (input_codec_context)
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avcodec_close(input_codec_context);
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avcodec_free_context(&input_codec_context);
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if (input_format_context)
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avformat_close_input(&input_format_context);
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