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<p>Hi,</p>
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</p>
<p><span>I would like to ask some questions. I am doing a project measuring streaming videos. Currently, I use ffmpeg to get video info and trying to read some frames. I tried using this
<a href="https://www.ffmpeg.org/doxygen/3.1/avio_reading_8c-example.html" class="OWAAutoLink" id="LPlnk116221" previewremoved="true">
https://www.ffmpeg.org/doxygen/3.1/avio_reading_8c-example.html</a> with av_read_frame() from ffmpeg's example to try with mp4 files downloaded from youtube and
<a href="http://d.tube" class="OWAAutoLink">dtube</a>. Only videos from dtube generate an error, as follows:</span><br>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">[mov,mp4,m4a,3gp,3g2,mj2 @ 0xed4040] stream 0, offset 0x30: partial file</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">[mov,mp4,m4a,3gp,3g2,mj2 @ 0xed4040] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 854x480, 1059 kb/s): unspecified pixel format</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">Consider increasing the value for the 'analyzeduration' and 'probesize' options</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">[mov,mp4,m4a,3gp,3g2,mj2 @ 0xed4040] Could not find codec parameters for stream 1 (Audio: aac (mp4a / 0x6134706D), 44100 Hz, 2 channels, 127 kb/s): unspecified sample format</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">Consider increasing the value for the 'analyzeduration' and 'probesize' options</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'dtube.mp4':</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> Metadata:</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> major_brand : isom</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> minor_version : 512</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> compatible_brands: isomiso2avc1mp41</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> encoder : Lavf57.56.101</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> Duration: 00:06:03.50, bitrate: N/A</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 854x480, 1059 kb/s, SAR 1280:1281 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> Metadata:</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> handler_name : VideoHandler</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, 2 channels, 127 kb/s (default)</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> Metadata:</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;"> handler_name : SoundHandler</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">[mov,mp4,m4a,3gp,3g2,mj2 @ 0xed4040] stream 0, offset 0x30: partial file</span></div>
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<div dir="ltr" style="text-align: left;"><span style="font-size: 9pt;">av_read_frame: Invalid data found when processing input</span></div>
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I have already tried with different versions of ffmpeg. I would be appreciated if someone could help me with this.
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<div>Regards,</div>
<div>Sornrakitch<br>
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