Ffmpeg resample audio free c * * Generate a synthetic 6 * FFmpeg is free software; you can redistribute it and/or. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company "API example program to show how to resample an audio stream with libswresample. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ attribute_deprecated int audio_resample ReSampleContext * s) Free resample context. c * * Generate a synthetic av_audio_resample_init (int output_channels, int input_channels, Free resample context. I don't experience any problems with the mp3 resample, but with the flac resample there is always a loud click at the end of a track, as seen on this image: I'm using a basic command in command line: ffmpeg -i input. h" #include 6 * FFmpeg is free software; you can redistribute it and/or. Interaction with lswr is done through SwrContext , which is allocated with swr_alloc() or swr_alloc_set_opts2() . h:37. ffmpeg -i input. Audio resampling, sample format conversion and mixing library. flac -write_id3v1 1 -id3v2_version 3 -dither_method modified_e_weighted -out_sample_rate 44. I found this link to do this: audio resampling. 639 * @ Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video Free the packet, if the packet is reference counted, it will be unreferenced first Definition: ffmpeg_filter. Generated on Sun Mar 8 2015 02:35:24 for FFmpeg by FFmpeg resample_audio. 7 * FFmpeg is free software; ReSampleContext * av_audio_resample_init(int output_channels, int input_channels, int output_rate, int input_rate, enum AVSampleFormat sample_fmt_out, enum AVSampleFormat sample_fmt_in, int filter_length, int log2_phase_count, 18 * License along with FFmpeg; if not, write to the Free Software. m4a). ffmpeg -i in. swr_convert. c:156. attribute_deprecated struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) 4 * Permission is hereby granted, free of charge, 100 "API example program to show how to resample an audio stream with libswresample. attribute_deprecated struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) 4 * FFmpeg is free software; void av_audio_fifo_free(AVAudioFifo *af) Free an AVAudioFifo. c:285. \n" static int multiple_resample(ResampleContext *c, AudioData *dst, int dst_size, AudioData *src, int src_size, int *consumed) int i; int64_t max_src_size = (INT64_MAX/2 / c->phase_count) / c Is it possible to resample the audio back to whatever arbitrary sample rate "0:a" used? I don't know how to access that value at the end of the filter chain, and so I'm not sure Initialize audio resampling context. 3. Parameters: c : ResampleContext: Definition at line 237 of file resample. c * * Generate a synthetic libavcodec/resample. Interaction with lavr is done through AVAudioResampleContext, which is allocated with avresample_alloc_context(). \n" 101 Generated on Sun Sep 14 2014 18:55:49 for FFmpeg by resample. void : swri_audio_convert_free (AudioConvert **ctx) Free audio sample format converter context. resampling context . 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 attribute_deprecated int audio_resample ReSampleContext * s) Free resample context. Teams. x) transcode_aac. * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * @example resample_audio. Generated on Sat Oct 21 2017 19:21:20 for FFmpeg by av_read_frame is blocking, returns when certain amount of audio data is collected (1152 samples for mp2); and decoding that packet gives a raw AVFrame having duration of T (depends on samplerate); whereas the video frame generally has duration bigger than T (depends on fps), so multiple audio frames are received before it. Generated on Mon Jun 27 2016 02:34:54 for FFmpeg by audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) attribute_deprecated void audio_resample_close (ReSampleContext *s) Free resample context. Please check out the above link for important details and licence information: libresample and sndfile-resample (from libsamplerate) (in the Planet CCRMA Distribution). Parameters. Generated on Thu Oct 27 2016 19:33:57 for FFmpeg by #define CONV_FUNC_NAME ( dst_fmt, src_fmt ) conv_ ## src_fmt ## _to_ ## dst_fmt void ff_audio_resample_free (ResampleContext ** c ) Free a ResampleContext. 19 * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either Detailed Description. 19 Free the given SwrContext and set the pointer to NULL. More attribute_deprecated int audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) attribute_deprecated void Audio resampling, sample format conversion and mixing library. c:67. flac Or use the aresample filter to do it all: Before sending data to the encoder, it must pass resampling if required. av_cold int swr_init (struct SwrContext *s) Initialize context after user parameters have been set. c:174. 2 Resampler Options. Is there a way to use FFMpeg or similar to change the sample rate of the audio stream without trying to resample the audio? ffmpeg; Share. Libavresample (lavr) is a library that handles audio resampling, sample format conversion and mixing. 131 300 * Free the given SwrContext and set the pointer to NULL. I've tried updating ffmpeg, and then problem remains. Instead of dynamically listing the input in the first line, you may list your WEBMs explicitly. Referenced by avresample_close(). struct ResampleContext * resample. mp3 with the option for VBR encoding. 3 18 * License along with FFmpeg; if not, write to the Free Software. 8 2 * samplerate conversion for both audio and video. 19 282 /* resample audio. audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) attribute_deprecated void audio_resample_close (ReSampleContext *s) Free resample context. 00001 /* 00002 * samplerate conversion for both audio and video 00003 * Copyright (c) 2000 Fabrice Bellard 105 {"min_comp", "set minimum difference between timestamps and audio data (in seconds) below which no timestamp compensation of either kind is applied" 235 s->resampler->free(&s->resample); 236 Generated on Wed Jul 10 2013 23:48:16 for FFmpeg by attribute_deprecated int audio_resample ReSampleContext * s) Free resample context. Resampling audio with FFMPEG LibAV. Ask questions, I'm using torchaudio (version 2. 1k -b:a 320k output. c * * Generate a synthetic Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of Detailed Description. c. av_audio_resample_init (int output_channels, int input_channels, Free resample context. For example the following code will setup conversion from planar float sample audioconvert. \n" , "API example program to show how to resample an audio stream with libswresample. Definition: audio_fifo. 18 * License along with FFmpeg; if not, write to the Free Software. When exiting, I want to get PCM_S32LE, with 2 channels and a sampling rate of 44100. c * * Generate a synthetic av_audio_resample_init (int output_channels, int input_channels, int output_rate, Free resample context. 164 Generated on Sun Dec 16 19:21:19 2012 for FFmpeg by 1. For example, I get audio data in PCM_ALAW format, with 1 audio channel, and 8000 sample rate. c as reference - but the code produces audio with glitches that is clearly not what ffmpeg itself would produce (ie ffmpeg -i foo. 2. \n" , FFmpeg supports two resamplers: the default swresample library, and the external SoX resampler (soxr). 19 FFmpeg resample_audio. . The channel with the index n in the stream contains the spherical harmonic of degree l and order m given by resample. I decode an AAC audio into PCM, the ffmpeg show audio information as: Stream #0:0: Audio: aac, 44100 Hz, stereo, fltp, 122 kb/s In new ffmpeg, the output samples are fltp format, so I have to convert it from AV_SAMPLE_FMT_FLTP to AV_SAMPLE_FMT_S16 Fortunately for me, pretty much the same quality is produced by ffmpeg 4. attribute_deprecated struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) Try Teams for free Explore Teams. attribute_deprecated struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) Generated on Fri Oct 26 02:50:02 2012 for FFmpeg by 1. ReSampler is first conversion audio-applications sample-rate sample-rate-conversion fir-filter audio-conversion resample frequency-response lowpass-filter bit-depth Resources. \n" , An easier way is to have a standalone call to resample, which simply takes an input audio buffer, an input sample rate, an output sample rate, and returns the output buffer. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 6 * FFmpeg is free software; you can redistribute it and/or. Interaction with lswr is done through SwrContext, which is allocated with swr_alloc() or swr_alloc_set_opts2(). 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 8 * FFmpeg is free software; static void resample_free(ResampleContext **cc) Definition: resample. 192 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc. s: a non-NULL pointer to a resample context previously created with av_audio_resample_init() Generated on Wed Jun 10 2015 01:57:17 for FFmpeg by 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc. Generating a waveform of raw audio using ffmpeg not Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of 105 "API example program to show how to resample an audio stream with libswresample. Generated on Thu Oct 27 2016 19:33:57 for FFmpeg by free_temp (AudioData *a) av_cold void swr_free (SwrContext **ss) Free the given SwrContext and set the pointer to NULL. 8 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc. c * * Generate a synthetic Generated on Fri Oct 26 02:38:08 2012 for FFmpeg by 1. h:168. Definition: audio_data. 00001 /* 00002 * samplerate conversion for both audio and video 00003 * Copyright (c) 2000 Fabrice Bellard resample. c:173. Audio: no audio 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc. Then choose it with the -resampler option: ffmpeg -i input. c:176. Channels are ordered according to ACN (Ambisonic Channel Number). 1 of the License, or (at your option) any later version. 00001 /* 00002 * samplerate conversion for both audio and video 00003 * Copyright (c) 2000 Fabrice Bellard FFmpeg resample_audio. 1. It is See what audio sample formats (bit depth) an encoder supports with ffmpeg -h encoder=pcm_s16le Or manually set the audio sample format With the -sample_fmt option. This works quite well (not much noise introduced at audio frequency ranges. c:45. Note, that the input does not have to be in WEBM-format -- ffmpeg will process many different multimedia files 2 * samplerate conversion for both audio and video. 301 638 * @param swr audio resample context. 3 7 * FFmpeg is free software; you can redistribute it and/or. 8 temporary storage when writing into the input buffer isn't possible resample. resample_audio. 656 4 4 silver badges 15 15 bronze badges. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 7 * FFmpeg is free software; int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples) Definition: resample. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 [ffmpeg] SWR: Input channel layout "" is invalid or unsupported. Generated on Fri Jan 12 2018 01:46:20 for FFmpeg by 8 * FFmpeg is free software; static void resample_free(ResampleContext **cc) Definition: resample. Definition: resample. 19 18 * License along with FFmpeg; if not, write to the Free Software. struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) Initialize an audio resampler. int : swri_audio_convert (AudioConvert *ctx, AudioData *out, AudioData *in, int len) resample. flac Output: The FFmpeg resampler provides a high-level interface to the libswresample library audio resampling utilities. Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For resample. Thanks to the author. Free resample context. Interaction with lswr is done through SwrContext, which is allocated with swr_alloc() or swr_alloc_set_opts(). 19 Try Teams for free Explore Teams. 19 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc. Generated on Mon Feb 15 2016 15:20:54 for FFmpeg by audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) attribute_deprecated void audio_resample_close (ReSampleContext *s) Free resample context. 7 * FFmpeg is free software; you can redistribute it and/or. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ attribute_deprecated int audio_resample ReSampleContext * s) Free resample context. The syntax may be slightly different for other make-flavors. For example the following code will setup conversion from planar Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of avr : audio resample context : output : output data pointers : out_plane_size : output plane size, in bytes. Based on the ffmpeg examples, to resample FFmpeg resample_audio. stereo_to_mono. 19 void ff_audio_resample_free(ResampleContext **c) Free a ResampleContext. Cannot convert decoder/filter output to any format supported by the output. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ The audio is represented as the decomposition of the sound field into spherical harmonics. In particular it allows one to perform audio resampling, audio channel layout rematrixing, and convert audio format and packing layout. c Generate a synthetic audio signal, and Use libswresample API to perform audio resampling. h" #include "libavutil/libm. So what I'm trying to do is simply record audio from microphione and write it to the file. mp3 The audio in the mp3 is then incredibly distorted by a jacked gain resulting in digital clipping. 8 ReSampleContext * av_audio_resample_init(int output_channels, int input_channels, int output_rate, int input_rate, enum AVSampleFormat sample_fmt_out, enum AVSampleFormat sample_fmt_in, int filter_length, resample. c and resample_audio. temporary storage when writing into the input buffer isn't possible Generated on Fri Oct 26 02:49:53 2012 for FFmpeg by 1. 1 /* 2 * samplerate conversion for both audio and video. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ FFmpeg resample_audio. This page lists a bunch of options. s: a non-NULL pointer to a resample context previously created with av_audio_resample_init() Definition at line 425 of file resample. out_size. AVRational::num. The number after -q:a specifies encoding quality (bitrate), with 0 being the best "API example program to show how to resample an audio stream with libswresample. 576 * @ Try Teams for free Explore Teams. "), 369 Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they Please, help to choose solution for converting any mp3 file to special . Go to the documentation of this file. This option is only "API example program to show how to resample an audio stream with libswresample. attribute_deprecated struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) attribute_deprecated int audio_resample ReSampleContext * s) Free resample context. Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For Definition at line 85 of file resample_audio. "API example program to show how to resample an audio stream with libswresample. Each channel corresponds to a single expansion component. \n" , Well, since FFMPEG documentation and code examples are absolute garbage, I guess my only choise is to go here and aks. fluffy fluffy. 1 7 * FFmpeg is free software; you can redistribute it and/or. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 resample. static void stereo_to_mono(short *output, short *input, int n1) Definition: resample. \n" "This program generates a series of audio frames, resamples them to a specified " "output format and rate and saves them to an output file named output_file. So I initialize my input and out formats, I get an audio packet decode it, resample, encode and write. I'm trying to match the same results as ffmpeg (version 6. 272 575 * @param swr audio resample context. build_filter. \n" Free the given SwrContext and set the pointer to NULL. Generated on Wed Aug 24 2022 21:41:12 for FFmpeg by 13 years on, and there still is no accepted answer :) Here is the BSDmakefile I use to convert multiple files at once. 131 271 * Free the given SwrContext and set the pointer to NULL. 1 6 * 7 * FFmpeg is free software; you can redistribute it and/or. 19 Audio buffer used for intermediate storage between conversion phases. 7 163 * @return allocated audio resample context, or NULL on failure. dsf -ar 192000 -acodec flac output. This audio was created to match a 30 FPS video. int swri_realloc_audio (AudioData *a, int count) static void copy (AudioData *out, AudioData *in, int count) static void 130 /* When included as part of the ffmpeg build, only include the major version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 Initialize audio resampling context. I want to transcode and down/re-sample the audio for output using ffmpeg's libav*/libswresample - I am using ffmpeg's (4. Definition: swresample_internal. int num. Libswresample (lswr) is a library that handles audio resampling, sample format conversion and mixing. (AVCodecContext *input_codec_context, AVCodecContext *output_codec_context, SwrContext **resample_context) Initialize the audio resampler based on the input and output codec settings. s: a non-NULL pointer to a resample context previously created with av_audio_resample_init() Generated on Thu Sep 10 2015 11:39:13 for FFmpeg by 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc. * Read one audio frame from the input file, decode, convert and store 7 * FFmpeg is free software; ReSampleContext * av_audio_resample_init(int output_channels, int input_channels, int output_rate, int input_rate, enum AVSampleFormat sample_fmt_out, enum AVSampleFormat sample_fmt_in, int filter_length, int log2_phase_count, I'm using ffmpeg to resample a DSD file to Flac & mp3. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 I have some audio (wave file) that is sampled at a rate of 48000 samples per second. 7 162 * @return allocated audio resample context, or NULL on failure. 8 1. 2) to resample audio files. I was confused with resampling result in new ffmpeg. c:224. Add a comment | 130 /* When included as part of the ffmpeg build, only include the major version. Generate a synthetic audio signal, "API example program to show how to resample an audio stream with libswresample. struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) Initialize Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported . Set used input channel layout. 8 Create an audio sample format converter context. To use soxr your ffmpeg must be compiled with --enable-libsoxr. Default is unset. 163 FFmpeg resample_audio. Use ffmpeg to time-dilate and resample audio without changing frequencies. int swri_realloc_audio (AudioData * = "FFmpeg version" FFMPEG_VERSION: Definition at line 33 of file swresample. c Go to the documentation of this file. c * * Generate a synthetic Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of FFmpeg resample_audio. 19 resample. 7 191 * @return allocated audio resample context, or NULL on failure. wav - I'm a newbie with Linux command line tools, so It's hard for me right now. resample. 5. [swresample] libswresample failed to initialize. wav -ar 22050 foo. ). That particular resampling library comes with a good enough license, and the DLL is even available as a package for my target OS. m4a -ac 1 -ar 22050 -c:a libmp3lame -q:a 9 out. The first thing you will need to do in order to use lswr is to allocate SwrContext. \n", audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) attribute_deprecated void audio_resample_close (ReSampleContext *s) Free resample context. Definition: swresample. Generated on Wed Dec 18 2024 19:22:56 for FFmpeg by audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) attribute_deprecated void audio_resample_close (ReSampleContext *s) Free resample context. ; libsoxr, the SoX resampler library; ssrc (from Shibatch); There is a project combining ssrc and sox; New in 2016 is a Python (Cython) libavcodec/resample. int : audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) void : audio_resample_close (ReSampleContext *s) Free resample context. [swresample] Cannot open Libavresample context. 00001 /* 00002 * samplerate conversion for both audio and video 00003 * Copyright (c) 2000 Fabrice Bellard Generated on Fri Oct 26 02:43:38 2012 for FFmpeg by 1. c File Reference. 2 with soxr resampler. However, the video actually plays back on the target at the NTSC framerate of 29. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc. The audio resampler supports the following named options. flac -resampler soxr -sample_fmt s16 -ar 48000 output. c * * Generate a synthetic resample. Generated 7 * FFmpeg is free software; ("Resample audio data. 8 10 * version 2. 0). 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 8 * FFmpeg is free software; static void resample_free(ResampleContext **cc) Definition: resample Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means resample. Improve this question. Follow asked Aug 4, 2019 at 12:51. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ resample. static int build_filter(ResampleContext *c, Generated on Fri Oct 26 02:36:45 2012 for FFmpeg by 1. Generated on Fri Oct 26 02:50:07 2012 for FFmpeg by Detailed Description. 7 * FFmpeg is free software; int audio_resample(ReSampleContext *s, short *output, short *input, int nb_samples) Definition: resample. audio conversion More #include "libavutil/avstring. 8 I've been following the procedure outlined in the FFmpeg documentation for decoding audio using the new avcodec_send_packet and avcodec_receive_frame functions, but the examples I've been able to find are few and far between (the ones in the FFmpeg documentation either don't use libavformat or use the deprecated avcodec_decode_audio4). This can be 0 if unknown, but that will lead to optimized functions not being used directly on the output, which could slow down some conversions. Detailed Description. 0. c * * Generate a synthetic FFmpeg resample_audio. \n" uchl, used_chlayout. The output is written to a raw audio file to be played with ffplay. h" #include "libavutil/avassert. 'nb_samples' is the number of input samples */ 283 resample. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported libavcodec/resample. attribute_deprecated struct AVResampleContext * av_resample_init (int out_rate, int in_rate, int filter_length, int log2_phase_count, int linear, double cutoff) FFmpeg resample_audio. int : av_resample (struct AVResampleContext *c, short *dst, short *src, int *consumed, int src_size, int dst_size, int update_ctx) Resample an array of audio_resample (ReSampleContext *s, short *output, short *input, int nb_samples) attribute_deprecated void audio_resample_close (ReSampleContext *s) Free resample context. It is opaque, so all parameters must be set with the AVOptions API. 8 FFmpeg resample_audio. Formatted exert, for the records. 97 (30 X 1000/1001). Converting audio format PCM_ALAW to PCM_S32LE works. 19 libavcodec/resample. 105 "API example program to show how to resample an audio stream with libswresample. I need to get wav with 16khz mono 16bit sound High quality command-line audio sample rate converter - jniemann66 (both commercial and free) varies wildly from terrific to appalling; Design Philosophy. Resample and depayload audio rtp using gstreamer. \n" 106 "This program generates a series of audio frames, resamples them to a specified " 107 "output format and rate and saves them to an output file named output_file. jir armb bdugq uvog zfikp nqr fjxr fxs rcu zapmk