ffmpeg não gerando largura de banda no meu arquivo mpd (traço)

Question

Estamos desenvolvendo um player embutido que transmite através do protocolo DASH. Uma parada é primeiro converter todas as mídias enviadas pelo usuário para MP4 (h264), o problema é que, quando o ffmpeg gera o manifesto para o DASH (arquivo MPD), ele não inclui o valor de largura de banda para o segmento de vídeo. O áudio vem com a largura de banda.

A ausência da largura de banda para o segmento de vídeo faz com que o player não reproduza o vídeo.

Como posso ter certeza de que o ffmpeg incluirá a largura de banda?

Comando

ffmpeg:

segment_cmd = [
        'ffmpeg -i {input_file}'
        ' -c copy',
        ' -c:v libx264',
        ' -x264-params "nal-hrd=cbr"',
        ' -vf scale=-1:{resolution}',
        ' -b:v 1M',
        ' -minrate 1M',
        ' -maxrate 1M',
        ' -bufsize 2M',
        ' -use_template 1',
        ' -init_seg_name init-stream\$RepresentationID\$-$Bandwidth\$.m4s',
        ' -media_seg_name chunk-stream\$RepresentationID\$-\$Bandwidth\$-\$Number\$.m4s',
        ' -adaptation_sets "id=0,streams=v id=1,streams=a"',
        ' -f dash {prep_dir}{resolution}.mpd'
    ]

o arquivo MPD sem BANDWIDTH

<?xml version="1.0" encoding="utf-8"?>
<MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="urn:mpeg:dash:schema:mpd:2011"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xsi:schemaLocation="urn:mpeg:DASH:schema:MPD:2011 http://standards.iso.org/ittf/PubliclyAvailableStandards/MPEG-DASH_schema_files/DASH-MPD.xsd"
    profiles="urn:mpeg:dash:profile:isoff-live:2011"
    type="static"
    mediaPresentationDuration="PT1M30.0S"
    minBufferTime="PT4.9S">
    <ProgramInformation>
    </ProgramInformation>
    <Period start="PT0.0S">
        <AdaptationSet contentType="video" segmentAlignment="true" bitstreamSwitching="true" frameRate="24000/1001">
            <Representation id="0" mimeType="video/mp4" codecs="avc1.64001f" width="1280" height="720" frameRate="24000/1001">
                <SegmentTemplate timescale="24000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
                    <SegmentTimeline>
                        <S t="0" d="143143" />
                        <S d="127127" />
                        <S d="121121" />
                        <S d="116116" />
                        <S d="126126" />
                        <S d="89089" />
                        <S d="150150" />
                        <S d="106106" />
                        <S d="152152" />
                        <S d="82082" />
                        <S d="133133" />
                        <S d="107107" />
                        <S d="154154" />
                        <S d="81081" />
                        <S d="116116" />
                        <S d="140140" />
                        <S d="118118" />
                        <S d="99099" />
                    </SegmentTimeline>
                </SegmentTemplate>
            </Representation>
        </AdaptationSet>
        <AdaptationSet contentType="audio" segmentAlignment="true" bitstreamSwitching="true">
            <Representation id="1" mimeType="audio/mp4" codecs="mp4a.40.2" bandwidth="128000" audioSamplingRate="44100">
                <AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2" />
                <SegmentTemplate timescale="44100" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startNumber="1">
                    <SegmentTimeline>
                        <S t="0" d="260096" />
                        <S d="233472" />
                        <S d="222208" />
                        <S d="214016" />
                        <S d="231424" />
                        <S d="163840" />
                        <S d="275456" />
                        <S d="195584" />
                        <S d="279552" />
                        <S d="150528" />
                        <S d="244736" />
                        <S d="196608" />
                        <S d="283648" />
                        <S d="148480" />
                        <S d="214016" />
                        <S d="257024" />
                        <S d="217088" />
                        <S d="185344" />
                    </SegmentTimeline>
                </SegmentTemplate>
            </Representation>
        </AdaptationSet>
    </Period>
</MPD>