diff options
| -rw-r--r-- | source/blender/blenkernel/intern/writeffmpeg.c | 48 |
1 files changed, 44 insertions, 4 deletions
diff --git a/source/blender/blenkernel/intern/writeffmpeg.c b/source/blender/blenkernel/intern/writeffmpeg.c index af8b32ab75c..082ae380070 100644 --- a/source/blender/blenkernel/intern/writeffmpeg.c +++ b/source/blender/blenkernel/intern/writeffmpeg.c @@ -111,8 +111,9 @@ static void delete_picture(AVFrame *f) } } -static int use_float_audio_buffer(int codec_id) +static int request_float_audio_buffer(int codec_id) { + /* If any of these codecs, we prefer the float sample format (if supported) */ return codec_id == CODEC_ID_AAC || codec_id == CODEC_ID_AC3 || codec_id == CODEC_ID_VORBIS; } @@ -629,16 +630,55 @@ static AVStream *alloc_audio_stream(RenderData *rd, int codec_id, AVFormatContex c->bit_rate = ffmpeg_audio_bitrate * 1000; c->sample_fmt = AV_SAMPLE_FMT_S16; c->channels = rd->ffcodecdata.audio_channels; - if (use_float_audio_buffer(codec_id)) { + + if (request_float_audio_buffer(codec_id)) { + /* mainly for AAC codec which is experimental */ c->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL; c->sample_fmt = AV_SAMPLE_FMT_FLT; } + codec = avcodec_find_encoder(c->codec_id); if (!codec) { //XXX error("Couldn't find a valid audio codec"); return NULL; } + if (codec->sample_fmts) { + /* check if the prefered sample format for this codec is supported. + * this is because, depending on the version of libav, and with the whole ffmpeg/libav fork situation, + * you have various implementations around. float samples in particular are not always supported. + */ + const enum AVSampleFormat *p = codec->sample_fmts; + for (; *p!=-1; p++) { + if (*p == st->codec->sample_fmt) + break; + } + if (*p == -1) { + /* sample format incompatible with codec. Defaulting to a format known to work */ + st->codec->sample_fmt = codec->sample_fmts[0]; + } + } + + if (c->sample_fmt == AV_SAMPLE_FMT_FLTP) { + BLI_strncpy(error, "Requested audio codec requires planar float sample format, which is not supported yet", error_size); + return NULL; + } + + if (codec->supported_samplerates) { + const int *p = codec->supported_samplerates; + int best = 0; + int best_dist = INT_MAX; + for (; *p; p++){ + int dist = abs(st->codec->sample_rate - *p); + if (dist < best_dist){ + best_dist = dist; + best = *p; + } + } + /* best is the closest supported sample rate (same as selected if best_dist == 0) */ + st->codec->sample_rate = best; + } + set_ffmpeg_properties(rd, c, "audio"); if (avcodec_open2(c, codec, NULL) < 0) { @@ -664,7 +704,7 @@ static AVStream *alloc_audio_stream(RenderData *rd, int codec_id, AVFormatContex audio_output_buffer = (uint8_t *) av_malloc(audio_outbuf_size); - if (use_float_audio_buffer(codec_id)) { + if (c->sample_fmt == AV_SAMPLE_FMT_FLT) { audio_input_buffer = (uint8_t *) av_malloc(audio_input_samples * c->channels * sizeof(float)); } else { @@ -970,7 +1010,7 @@ int BKE_ffmpeg_start(struct Scene *scene, RenderData *rd, int rectx, int recty, AVCodecContext *c = audio_stream->codec; AUD_DeviceSpecs specs; specs.channels = c->channels; - if (use_float_audio_buffer(c->codec_id)) { + if (c->sample_fmt == AV_SAMPLE_FMT_FLT) { specs.format = AUD_FORMAT_FLOAT32; } else { |