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Sur d’autres sites (11920)

  • avfilter's anull says "Rematrix is needed between stereo and 0 channels but there is not enough information to do it"

    24 mai 2017, par kuanyui

    I’m trying to write a transcoder according to FFMpeg’s official example with ffmpeg 3.2.4 (official prebuild Win32), and try to transcode a video with stereo audio stream source (from avformat’s dshow).

    In the example code, which passes anull into avfilter_graph_parse_ptr() for audio stream, and "time_base=1/44100:sample_rate=44100:sample_fmt=s16:channels=2:channel_layout=0x3" is passed into avfilter_graph_create_filter(), occurs error in the following avfilter_graph_config() :

    [auto-inserted scaler 0 @ 32f77600] w:iw h:ih flags:'bilinear' interl:0
    [Parsed_null_0 @ 2e9d79a0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'in' and the filter 'Parsed_null_0'
    [swscaler @ 3331bfe0] deprecated pixel format used, make sure you did set range correctly
    [auto-inserted scaler 0 @ 32f77600] w:1920 h:1080 fmt:yuvj422p sar:1/1 -> w:1920 h:1080 fmt:yuv420p sar:1/1 flags:0x2
    [libmp3lame @ 2e90a360] Channel layout not specified
    [in @ 3866e8a0] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
    [Parsed_anull_0 @ 330e8820] auto-inserting filter 'auto-inserted resampler 0' between the filter 'in' and the filter 'Parsed_anull_0'
    [auto-inserted resampler 0 @ 330e8dc0] [SWR @ 3809b620] Rematrix is needed between stereo and 0 channels but there is not enough information to do it
    [auto-inserted resampler 0 @ 330e8dc0] Failed to configure output pad on auto-inserted resampler 0

    I’ve googled for days but didn’t find any clue for it. Doesn’t what anull do is only "Pass the audio source unchanged to the output", why libav want to resample stereo to 0 channel ? What’s going wrong ?

  • ffmpeg : avfilter's anull says "Rematrix is needed between stereo and 0 channels but there is not enough information to do it"

    12 juillet 2017, par kuanyui

    I’m trying to write a transcoder according to FFMpeg’s official example with ffmpeg 3.2.4 (official prebuild Win32), and try to transcode a video with stereo audio stream source (from avformat’s dshow).

    In the example code, which passes anull into avfilter_graph_parse_ptr() for audio stream, and "time_base=1/44100:sample_rate=44100:sample_fmt=s16:channels=2:channel_layout=0x3" is passed into avfilter_graph_create_filter(), occurs error in the following avfilter_graph_config() :

    [auto-inserted scaler 0 @ 32f77600] w:iw h:ih flags:'bilinear' interl:0
    [Parsed_null_0 @ 2e9d79a0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'in' and the filter 'Parsed_null_0'
    [swscaler @ 3331bfe0] deprecated pixel format used, make sure you did set range correctly
    [auto-inserted scaler 0 @ 32f77600] w:1920 h:1080 fmt:yuvj422p sar:1/1 -> w:1920 h:1080 fmt:yuv420p sar:1/1 flags:0x2
    [libmp3lame @ 2e90a360] Channel layout not specified
    [in @ 3866e8a0] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
    [Parsed_anull_0 @ 330e8820] auto-inserting filter 'auto-inserted resampler 0' between the filter 'in' and the filter 'Parsed_anull_0'
    [auto-inserted resampler 0 @ 330e8dc0] [SWR @ 3809b620] Rematrix is needed between stereo and 0 channels but there is not enough information to do it
    [auto-inserted resampler 0 @ 330e8dc0] Failed to configure output pad on auto-inserted resampler 0

    I’ve googled for days but didn’t find any clue for it. Doesn’t what anull do is only "Pass the audio source unchanged to the output", why libav want to resample stereo to 0 channel ? What’s going wrong ?

  • avcodec : Don’t anonymously typedef structs

    22 septembre 2014, par Diego Biurrun
    avcodec : Don’t anonymously typedef structs
    
    • [DBH] libavcodec/aacpsy.c
    • [DBH] libavcodec/ac3dec.c
    • [DBH] libavcodec/alac.c
    • [DBH] libavcodec/alsdec.c
    • [DBH] libavcodec/amrwbdec.c
    • [DBH] libavcodec/ansi.c
    • [DBH] libavcodec/atrac1.c
    • [DBH] libavcodec/avs.c
    • [DBH] libavcodec/binkaudio.c
    • [DBH] libavcodec/bitstream.c
    • [DBH] libavcodec/c93.c
    • [DBH] libavcodec/cdxl.c
    • [DBH] libavcodec/cinepak.c
    • [DBH] libavcodec/cook.c
    • [DBH] libavcodec/cscd.c
    • [DBH] libavcodec/dcadec.c
    • [DBH] libavcodec/elbg.c
    • [DBH] libavcodec/g723_1.c
    • [DBH] libavcodec/gif.c
    • [DBH] libavcodec/huffman.c
    • [DBH] libavcodec/idcinvideo.c
    • [DBH] libavcodec/iff.c
    • [DBH] libavcodec/imc.c
    • [DBH] libavcodec/kgv1dec.c
    • [DBH] libavcodec/libopenjpegdec.c
    • [DBH] libavcodec/libopenjpegenc.c
    • [DBH] libavcodec/libspeexdec.c
    • [DBH] libavcodec/libspeexenc.c
    • [DBH] libavcodec/mimic.c
    • [DBH] libavcodec/nuv.c
    • [DBH] libavcodec/proresdec.c
    • [DBH] libavcodec/qcelpdec.c
    • [DBH] libavcodec/qdm2.c
    • [DBH] libavcodec/ra288.c
    • [DBH] libavcodec/roqaudioenc.c
    • [DBH] libavcodec/roqvideoenc.c
    • [DBH] libavcodec/rv34_parser.c
    • [DBH] libavcodec/sipr.c
    • [DBH] libavcodec/srtdec.c
    • [DBH] libavcodec/svq3.c
    • [DBH] libavcodec/truespeech.c
    • [DBH] libavcodec/v210enc.h
    • [DBH] libavcodec/vble.c
    • [DBH] libavcodec/vc1_parser.c
    • [DBH] libavcodec/vc1dec.c
    • [DBH] libavcodec/vorbisdec.c
    • [DBH] libavcodec/vorbisenc.c
    • [DBH] libavcodec/wmalosslessdec.c
    • [DBH] libavcodec/wmaprodec.c
    • [DBH] libavcodec/wmavoice.c
    • [DBH] libavcodec/zerocodec.c