# 转换和编码摄像头流

Source: [https://docs.qualcomm.com/doc/80-70017-50SC/topic/camera-transform-downscale-and-rotate-encode.html](https://docs.qualcomm.com/doc/80-70017-50SC/topic/camera-transform-downscale-and-rotate-encode.html)

**gst-camera-rotate-downscale-file.py** 应用程序可旋转、缩小摄像头流并对其进行编码。然后将转换后的数据流保存到文件中。

Figure : 视频转换 pipeline
            
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CS0NQJnauzb/YGKD+V7aJ4RpXtob22RUgeQzRM1yzJTuJTSQQ1iGRlbrRZIHOG0pBDmY+BL3x6wa36DqFvIZQgKl7buybF29jQg8rF9az+dwjiA7tikZ7c7xcOxPExacclLc3TaiglW8oSvmN1Ea9x+oYv5BnxAxRHbFFanWs1zuWAZPN6mZ1cI4KMiNTEqEkRVz5YLqsIYS1Owav6QZ3PS0LHEYw1XID+i4oiusXfHLHDuo+7THwZsD1Oq+imL4/Ec0Egu3qJzJ1jWGX5wqlYOZMVQunoeLZ7f9vxexIPn1pQcIYhdlCZ84DIiRo92Q5PWefCL+85N6BglTvekfl658i22YklmvOKz08PFAUiehBA8HjPmiDp3ieyfIuecyTJxkRannqZE6W+nzSndN19+kFLRrNlW20RzOxxx0xy8VVDn6f5xa0rF7k1MKv6Eo2Z1uV0QdZo6ejbpcS2lJiK4GdSsQfTiJBwSacPQzo4WH4P/mrUtgH+VJ1DoUbugon0ZI39D+yJR0d5hH08Ec/dU7SrR3CMuYw2ahShnVN8GQvSt2FkyZuKxqMOgdG+q/QgjJ/WerE3f/N2BijS2T8fRKBhzdrTw+zDPkcArl4KKuTlqZl3nRL9N07dbZgtLH0cNrRr3kxz9qSmTfqxLTa2f6T0lovSOjVGb7pHWdkFrTzVwGt43a5H7Sc51W3xTyJiearOxbG2a723T5hLREetuQelxff9ph4orWEaJpnR2BKBIbTet4O1ZH74HuGM3dXuO6GKziiVeEoZebO9gyX062TpbULE7yiXfbBdEa83M9sk5Rxu9hw91RHIZzGrV0k+uEhXNy+x5xTQ/72Jjd2hFGm3GidlPofmihFsh5xU5Nbel1Hgf7Z1UaHVN3B8ZbF8M77TPwJ+OFp6GMB/alyd5G1Cp6KMGXXMjlrhinp2dWCFBJSjhsmGb9Ew9YWCqWZvTVDR1lJYTzrrmmK26Qs+tvJP1epnlcgYsRzXNCDxfa14kuvrvhZub5rXZizTdtNErpod93nCyiSrEpEdqUjY9w7OJigrEX07tiV6vl2n2weP7tHsgyLlLR+uiszd19NFegRGXVoIuNbPjiTkiSp9iqfYuNO5XS/lhuoKj08Z877O1gtJvWDppvUidK3B6DuaI1m7XIOZ5tN3po63P7yTgJjUPOlQ0ezfbRHMP2HPfvBR9xE1zG0/l1RQPOOKc+VDO/F4YwjkPOXfBmmJfMvKOUr+om2BuRtmz+PmGFo4XVDRt5F4C1uCJmf5n83kYEjy/WhCRWAQyiXFjeox3QDXOdTPbd89fJyLn6Oel5JxLkasuXXXkHL1VkHO0ayVWRWHkaIt9i17YUhA1s+vknHPU1TE/fKbEQN+HNru6ugrCS/F8PFmA9otreDR9mkA/xZH0eVyhd50j54oH2FqAfXerDUiW0koNFBAKNR0RFa+2Wiv044iETCuNovcsjUI+rxfIge3uPiS7S/3saJ06WSzxOv3MCeM+kWChF9WWdIOsyZyZ6QJIcZv5Dqxm+pom94kEPZoCnakNnO4QbU441yGh8Vugohu8dZK4RsPsCEKRJIDoIeiYqIv8YBrmpLgccda9S0SO0opfSZ1zRLQl8f6EMZmSrFqApaeXIz6mq0SUcIgZBkUb0Wic6t7sLtSIiSo15ERqOOICrCF9JfrQcF/s+3Z2vzJP+ABQg4IeRM+PBlSnx3zEnE5fO0/db4UwuOrzsVow38AJV4mck2/JhITO9H62RSe7v7lm1vqj7H20m8XR+oTAx1cUqVm0IDWOqMlgziVnE7jOfi04G6POZi41vENzLdx1X/zmtFnrv8Le8+Ui3d5waSvPMXWFfF+WQcShVghSP3uhAGqYG5J3JHnXeHaxHwg4M6QKP9FTjpkpnIM1+IhNc287pQScdR3Q9y5Yj1IdcVbUA64EtG7TSM+eNKi4rGAo5jyoWKEUAYuqDDLKKw+WKNacDDgOZjz2THepuk7FN2A5JHgeqw61r9lLc87VAF6UIbjwfUB0pbJPr1I3q/oDk5vbyZrOFU+zb3iXXkXbddS8uTrnXPoN2R1XaM6a7m5m36e5o21V9dQ8bCW4tR09etRG1LxcbaR0h3OwM+1mnHb1SLuHqIPwgs7wMFBomuZ27M4Ite3bZuGB7X1OStdbuOJcesy0j1JayPZN52PWfvXawxMB4U4NJHq6l1wKVviAijuXq51d6mY1SOptX55/w9btamS3U797jkKi0RnS6NeB5GwP3HnaqC4/KdyX14I+oO5+S385Ne1SSsfaONoRellXQgXW5NId/Yp+OP20qrY/3XVQxLu43ludoza2Ujqp9xJZzdtYJTs9bRcovV1du0J0T0SruK2P8KgS7+9UjwpH7Z2l53ahEb1fOeK06zkivXaUBCLNAne4neD5AVHzWnX7Kl2f6puFnUoY+oQTaHcne7+gJ0n833hU2XvGIO6n9AM0q/cFmkjKqntC6dPKHjO61MQEal/DIzzfC408UBoJEjqrwJcHnZ/LO6rU2J1d081q5OdSetKw9qtT6qMqq2NjVFyydh/EOFr8wazC4y5dwRLfoq0aoEuLB/aAuraMFhBC8B4/qBebOiZQ/3Jvltb+cpTqOU99a7vuw3shMoZSHedbu+ae3RdEvWDmLlX2aYdWdNYVzmZNdxFj1ZGnB39s48l+O1QhRp1N6a+3W2aDMXUdMoYorWLM0ulH9rZLEXLlcvYm0SNmM32jysZ/qtCqJVI/dW2Wmqv2ctNsor6eeFfZr+5C7wafh4o7DiChw9G2aUftR+NtmsMEKp5W1xaoo1nfM7toZWhupzdLVNzrXSjoG1gJ8rUOnWz53oI20Iehm3O/desQ03Oys48ok9XCdZDBY2Z3QPVtz3Qu2Klk5XkpAnqS4zQt1Om+9lPFH7EzJPAGpftccm9gIi2kOqFzTNi3fXquxcZSH0DeyJCvOfeDNNcgHZhWtO3SMzPb0k/dxZvI1pGOuk+zyE8pPaJXutfTnFDcXCyxSe2Mo75nFhj2OT2S/+nduz+NPv722ednj6S7unpsDU8pMpBHEyrU2cbIl820fWVp21YrJ+rPbXf9KVyhNzKOuEqmpq+a4oLVtmcx4iz1awBs0QkZqAB1n05tn7BV71Nv0A+qVuiNisGFo0s+RwpMjR6p8uwsaPSAmA4xpac6cq85MM0iP6ZujYw4mzB1nXaRb5pOxqIOHZEu3sT5eIReSy7tVw9uHzjSCZ0jemLmBqWthCeZrbIMGcSNe4aOtmGM9i0ayRIuYOk1Jd7HGvy8gWlun/GAupbkKOLR6n8a1+i1z8/+Chz91AqCTwngR3f/1nLEp+bjU9eWakZWrTz+t24WcZbe7HHUTym1N6hz007ZJeneH3NPogXHq5W6X7tt7f73FoVOmFti7xtu9IuR3UAjRj6vHmlTafT2az/FGrmTl4BJqXFfPlHZ7FNzdGG/S0dXxm219D+KwqphxsWN8ezq7gg8LY95zt8zoNJqUa/RDtot+mIryJhlfMTLaXoksMeUjutTkbeNsRHWc8ws2hoT3p1d3X/8Ll1BfY+es2R23Jh95MwUtZalyo4f7y6lxjKYUN6g6fFFMT0dzpMpjGpyVT3+9lnVrl773l8gymwCfHR3zHUdMRUNjx8U9CbiLp3vVcmDjT7hB+m4mO1SE/9RNp5VOxsnZmR6CcVNjrhL7W07lWUaqy4dnY3bav9IS1FkMT/EHEQeIt6Fh4gLNcBqd2B6o4c1EIeBKJTByNVVWtGPinQCq9RtYMRZMB+rRBc0Zl16H/IezG6JX03Fr6EtG3OZ3zz4OcebgaQ9g9kU9IB+dinRbxusPDWwPdsCDzrhY1PM1cBEOiE91eKK43Ed8zA8NGCTmlX03ko8BoxnXTpA7/ExgO5+a+lrQAOTjV6nBDjAiLddOlV6TQA3i3F0mtzV2Ze3vzUmpDUoPaZ0G6OPjOJkXeLqisMZ4AlFivheHFTIzoMbxqyPtrXBxYpr2oS7Gt5vupBtkiv+0qevVuzBIljWQ9uuk7e3Ek7XtKcvCWbxGhukEfhVByFHIhvBnTA1U4ujdFHjE9rS4AAhSKfKmZKrT08dOQfpZhzxNqW42Ccq2m8drWcYGbBB3Yy9x1Uzvb20afbZC2z0+OXUrCI+Hgoegg+1gzyxwnx7x9n5jBpmrGSOXH2PZOhsqzULM1NRMfVKQXT1y18eV5BJaAiSwtDX9WNqWvFFZ4BHqwzT5O+flJ9v/YTedFgfzuun5v+/NqCctNE3sDKrEyFW6YD6Hv2A1r4Vz9MX1WrjE5/n0nc0VhA/j/98+sNZR9kLquih4nnuWT8xCzqy7dIXW+YavEzdmnGpuPo3JsY/RfSate8rrCj2l7pmHz2YUGwCV8qI7BviLuCvZ58HZ488EZ/SE9kEeM/ZgrmO0Sect8j6KaXZSYP+8GsT7xy4qxM1KKE+Jd6muRZnn56CGAHSGnjPK0kdb8xeWELsqb0DZJ+mcf2AvevL4eDne8khh+NUk75cRwQAZbzXd+nK+NV3f+3E0jt/0R1kqO9Ss4q8L+qcF3lVP7Av9axzV6voA0yXQF7nISwHr8kpWdpW6Xch65Irft6nr1r2cGdTdtwlJHf83shY3GAaGuBZXe41ybBgXwxansvMYg6OEXmOEo8ZiALqkR88X24WRDR9HSNSirBK9sH7GGfCchjsyfqTC8+svuMjKdTUyVHVRwZ3O4s0/fC1JugVocqPjbY7oB5r/WSNiMyWjipqUBdy4J5HBer1JR+xRj/pKIThPo+uT7MtFTpim46Z2Rv0gL0CzMFz4og66dWByen5zHRthA7GGmzMERF1X5Ee3gdLbs5Lxmzvb5osAo8xh1mByDtHqYBI97tQTu7s02q4+MyUpeevhoYWkJVFH3wNiDTfbF4kouI6s3TYrvPAmn5S4iWRc3QiJPRr6TA/Q76DNVoxqUHVHZjk5r5cye2E+1JLYQKdPC/xOr2VXaEniF0iY4xzZDal2fKsr5iR5M9kniBSkxnTi77k0QXT1NHHqS4dtPKct415Z5aIjKGBH/1nMvYxAZWcI5Nlm6YHU6NhIn3wMfrJwSX7ycWf4I4ym95HfJBOP7URzPRtLH205LY3gWDknNmMUJ9S1FkDbBPR1fQvkulJqZeePE9rr+olARH0Duxkg83D9z0s4eBKZT7qJs0iUKOVsFlFMA/N98kRUIDMSzW4S30doVOxETz+2oHJ3dXljHiFYVgfHpI5X4K1C7Aosz+ucJg2tD6ld6SVB6KYV7eYGbr4/LXRPSzzoURHcB7UOBaCjmpQl4FJzelV9O9F1A+uzxEdM1igig1rHfMAT8Jnw0BvL4MtXpDzWS8hHGLm2KSmOHhEXdkRau9o7P29galZQfKYpQPq0WJkPXqvXVCf4U4D0G/MULtsaTvTCk6+qMr+nEtsO5qn0Rh4qJGlByAmVBJ8nnaP6APTmvZe7MjwN1Bx3iIuSQ/fKo9bZNQrWx0aqbQIOm+YbhZzz9JDJQ11fSRPeVRfBkRq2+63K3D5N5MaJA9gWJHtnDDULjUJwu/5eJkuomcRqBGiV7FBkod3rNbavjOOmKAhww1BPM0Q/RTwVNUT8D74lHA4EURCfggw7QknWno10N+aLW2Pjw8o+lTPadvbz7ScVbCMU3FJ7mf3qxhHEH5KHnwcpauvpeYm86YxcGUjGb7cNluavc/rUOJOWlzX0fuIffpyBExvN40xkIfVY0pfq3QNqvFxa5XA6fE+ah3zHLtW4mweZWujWPtqjD6XTlEEL2zpbRpTH3xKbfsqFU+ttu8YiR8bZiJjDV69kppp4F2mtc2WMh19aPhHiMgPLfRDcnUDM6cEFXwR3bltjGmESgl+YawAsUpuRdAl+Gq1WyEMiQvLEEB9hMoHqB/MIMsrz5/kumjOzPT3HlBxk4cMPk/dJWS8OTAR4EBjwn61RV9eMdsvpm6vLgNTI7TmIYyImL32RdSUAB9usb5hPp4wHBp/YkAQfdaKkD6832IcNZ1xQ69ZRnsXctdycmlvpjNkxJat6V/sUgTnh3UYmDYq26e2ZUbbffgqqjhhItUowhrdrgFjb3dggvQWNSTrdH45PUE4Ppa17MXstmbMBD3luDEy2vH/QSaD9Iy5pJkr8eHepskGgeiCjyBSG1zGJogPS26cNMzHM3ITFjGT2KgQp+7QnI6IiNXEH6a+hvfB6+wcaJ3SHb0oMjHNKob3PnCPlN8IaBT5RjE2qkqVmtezLj2pkbyI18wLWdgHlYppvpFR3wg81eSx7T6PFv5yjLrKMjue7ExocOhBvpzST5WeWK+E+auL4mNVi2OMeI8uWuQaPKGRylqbZftgRy8ZEqlpnTTMd2OlAkwPCofWOM9bPGdXn1GZZRgv2z1gULau09XVCiNHz+epM46o79Bc1aqyLBs/cH9xogaCDBmzNr1l+wPT3+u1WE8YuIN58IvIqHuf6pj3l7r0xDIL77AMg80u4YeG6e7XYJGri/TV2mbJJu+I+WBRp4orFt1qhx5j1H360PbfT+k19iFAhmDOXYniSzKlfqxYeVoN0d3f36JdPWRfEm1BX7Q6ftJaSPz+nt03pleDr6aB6dMnVt9616ke6u68V2cH3N/rm/al7YnjLVfpqQQ/MnR3dfwgNdflb+OJ8CuQczGxmqY3Lm1fmqP2dodOdz+ib1+afRfg3JdfGr/Qob5dMemF7e0Paj+TdiFlHU627k/tFG730v73tGmtBhLCf0uaSKOEN2n6YPvSv3DiS96nzoS2dwVRb1FBN1ngnt11GyvoxSmdOsdr4/svp3VhU5wfHz9i/TOUWg3Hb4GuPt5ePa05uqEb429CZJeaAzdfIpfxbpPDwccH5GZXtx9fpc+tCnfasj7+PXffBV/iip+6uv15Bb0/9bZpf8/4xMf+Nd1QPfQSnJTV7GUq3lrdv5DSArcSpuT8iEB/TDzUykJCW96l5hLui5dqJEjNNkzNDXr3rdXt43qHFhLkQ+r6epJLzcP1lNWl5kMLYvQheD5PF+kG+5koNq36Eq1T98xKrTbR61mLEcKZMft4uXC/67XxrFfVAKPuDExzR+sTjwu6Dpbu2NoG9wBxi4qXx8fPF/S5aFVE+4vpjUvjl+ZogfOGkm3DrHJ2WEZ58AYVP+y1/Szr1SBG2xEdHBT0BMv5GFkrvuTqy9ur/5+Km/q6+9cXxsdfTlU73DVvrm5P/P7C3NTCuyO67N1Y8NwzHO8iGSxKWQ964weNX2pTqiPYwJfM4yw16/ImXf217zy+OjAlLP4gKlb3R6QlMgzVnIc9UB9pJUr9NFh5Jn6tWHlaDWHxcoduY5ncghsKSrxOZAy9K9AjRGZlyZiKW20iQyTRhCBERGwDfLgr1TOPojbeKUAPlNoIiRp2Rd0qisuAhgE5NwkhBPCy/QL0UKzaK7AbR32NCUCidBRtSrCyRwxfEohdWtHgQgLniMxL+gmByopLiH/KNGWcTQqNwGFm/toaNElwzDBkNqtZ0fVH+QHRgnj6Lf9JIvO2hV5cm5ZVw1g93NQSuAVvVNE9ROGoXxxNQTvU1vyXxY7sPdQUvBQyAqu8wb8uG1jTHLF/uBc+ik8IbF2t34S9O2pya9Y5oE/b4oMCSpJqnto0tzla4CURRgRZ7bWhlms3eXHD9PFMUM2UVY/CnaRVPzWs29JzAUeVfNd3JaIyT4hwXdGCF7Ad6oiFAb6QbcN0dQQvvNQ3yJEB29sRuwZzLxTv6S25nocvRT4eh9PWrkHpRd3QEx9HpSFoO55Spabkr5am5ybnvjGGWVCFIlqjymZKJDXMJV8qiEAuYp5sinUglfJyvQY82oG9k6kimm4r4SnBCG1p4Z00sQoE3iWQdI3Yp6YK58gQFd/AOdjEvLOH8xGtMRb6yGBlIioK2sBXOnRFty4XdCP6MDRzjmpM9dBFMXtWod/aKGZr8sqzKHrHSuU49A/P09poBIRBsgwzJd5LjRk5WndO+3gsPTXm9erhQ4xR99fM9O7vp67Vb5s+5zkbI75v07zE4O0vPhpfMptSPe+xqO0L+Zh9YdqYtf4r0bOoKcxEXBkRlWD0Ya9R2XfV8UMYCwPq+AO8VeZMyQ8Wps30wihGoFXa3DVvI67Qcz0110Q5HPmVrdSY6YWjdvbcN3323DUvsX74sBXjq2vG/DPG10dE6a9zjC+ZPktHLffleSqQRgN5YrEcPL+yMG06b95NKHFr2nz3FHgbi+BbqbnBPuRxdMSYZ3LXwotDTM+jQr6RDWO4bD3cxHIGOBj1lW7CyApHUIf3PNpfM6Z7vQYx4ubDVlR4D7qCb6AhY23BzYTLuG04eDkcOka8IRnaZ5x1n96eNp0+xsivL6yJykaFAuZPxRIfPsSSjWE/L7J6HBDvdY1Z2xplHz/nodAcpkYCnorJ/xGPtZGl7+7kSF9PQWpelVJT+qhvdI3piEaD1OMQvkAR5ANXHzjYb5ktIZV4d5dc+NnyHjfNCj6bqzFGhjeF50LxGmDXGCNT4usjxvziPrhPGAKorFV6z1N94eEVXSc13svTwz6AnbgqBpYLzCGm6GMT42F+QBaP8DDGGAnv+dKIEbmADXuwDgAejxiT3sP59/iyFPGHrcigqog3RsTacB2Bd3JYwtBlV9I1erDSwF4T0k9PjRl5HcsgtAerU/RwPkBGYynWKsmjkT/dNSv4cbOJseTr5hd/qw9DNufwyUA2RuoYzF5U6VcqVx6wQiodh/5FPWI+DjoIgwVKrK3FzJH2nnWlERHZ+7g4VdmlgwRkjTHPo9bw+7hkRCxnPMuVRB9ZY5zxUVtbVRg9rDKE/D3WFagk1FnmDCmxw4WZguA9typrdfS+xBpU1k7ZWmAWf1EtTbTGPvcRK6myiJqjj05zZEQGkv5lLkvWojD2ohCMQw3SqNLKaJaD0LvqLTUTfERbIWrRdchF39I7+lmLDL0A7litKx09tzh64aAD3lVZ9a1QExfzAHqoHJfeR0b2QfIealpiC9jJZIdnn/VCznAApliLwlDWVWWnNHxG6vtZZiss8xzoVlmMH/XzrRaWHngJEudZW41liSJfrehDiS2OQwCRUQKwPDNZDqK5KS5LrgFMTR58KWkF/4QwZKB80NUn/NVaXE2FAOawhSC4iIxVBjZrMcYagCywup7KYSlEqaq/jPPgpGM5QE9EvHCqqhzHeqkBGQSzERo8QYFVSAAyK2VTJ71nUsewA+A1PCyHGc9OR3A9mbmqmsIS9FiBjCO/B3WbAX6JqtTeTTbODuZoh84iKF3hSgPVEB8ez6pKs58JsAM9xaU0+1Kd84iSR9Zq1K1FnBLXcSVq4cng5zxCqXUJZ1PKSMkO6vdjfYlV1at09NKawyw5Pg/9E2KgIAwS4mglxmgHJmrlsISyLEWiypgk4HECvxejWFZi9AE8tcT7ElaiqsfDqj4aQeGivhhnJveGRVnzoJLhdQXoBI7WIkL0A3k+oRZy9zGCGiKv0JfXADYLNJAq80IfoIkXJcCS/MyMlwo7xISqoSpGr7eShvXlQGoE1w3QVKtqUoLQRqjifQiTPs6LlO6BwkpfCp8On39AHan9jwp1JO8kTRR1LAudOUZRufelDwrvQVczIB+SaWigMyog3AogHNC5w+dP6j3OR59wGzmW5UyQHS+hoeUMsFVSwUdRG0xC6UMdPZYTAZfoGCGjFMFHucd5UMCy5BLsUH6K0dgYG9lvzA63gKp+Urr2mFHMXenL+ShvM74sZ0AWyi/0pWROjOCACwrwUClQGVAGVu193dSA2ME+G9oJNUkD+vA+FHCGomLzQVoxyhkofYCTJKhBKdUTJIWinJKvl9MdQVWKpA/Or8AAN4NIXb0idV6QIRwZWNoMmJYZSXWFjzPhA88BlJOGMIKUSo6tDw/NnMtT7qHKM18oelJkUB4Q5QrppfmPHvqnyNgQAKQQmybS4rIBbEKiAO5VPIbP6QPRUHyfCaC2EFT1hJCDly9Jde8tizr24ATmoO71hMP3UBOvDwlgE+9AZ2APh5+hfuOwhNmW9A5Hct8ziQtAvQD0yZXfFyRhhqFqqDFwl6yeDI3CLdFNqcGPyWRJQhgGboiUDkNBAuxcpZqBzUMHb4Ugm74XZBm9l1IQ8qDyHmoKftFFFDKZl/hwYye7G74l9Q1t2VM5Cp/7pshcLnkbfJ5DQ2XRYMlSYbeg1mfdW7WCtiYT+zwQAr7YEr7/1ZnBwKAMcwt2FaQjv0pqk6s2A6WGZdV5TzGFa1JuJeGHFTEClalSMynX0yg7exYh70C5IQSQ7aBsOCikl9dB4DgA8zqDCKurm/qwrCp8eHkwWOgZgtC1zkoD/yLggayA8AkaoKgTeqQQQrYXOiYYmjkPQC7vYQchGCCmQj+F0JN7w5OwpEScAGpISjIhyAkeNMRLIYUAkd+AFi4zIcgEI4ZgWDgXjNBdkYJl6RXBe7DHZVj58vJ9ubTl4cNnToISJDenuMP5Iy9jcH+YCQH0PRnE3vBwAGAOW5N/a1hQK7Ms1QCqOfyMMUnYPfFrhVTLfuwDOmEcfYyhkdAjjxLStict7cpOQBXSb/P6pFBwWFFYEIsK9E5ZLxCpzhk18BRWJTQexDJHrnfyzvryfSELMLIAvQPVJUKiSBACDEt97skuKtSBK5nkN6hgaP8Z72n+rML1ddEWiH2AQoAEqV0Jg+qL550QYos6AXQ1fOuWQsc9qUVQD/i+ZAOqhluHX36Sxj+pfl/YMZgXdWqXh/fC2DCsW6HL+rDCJ8m7XHfso3bcgTLD3EF3pZELe+LXKEpeK08kAK0fCztbD7dU+uzBuuW+h4WXsnWDwdqqzMxgJ5ZkSbwAEKuTqn9Y095kUNYpNVhvZVjfU3Q+NHMOl17F3MnNSHPzj8Py2Jhi6mFvXx9ugduAinJBYbJHNRAiv/zPGMyVv+NXeovzFfgjhgB/qSVYDupNy2SdXxmQDE+995UBQby/fB9wXwFjhU6HXJVY10BPfh78GOfwmfXvqQmrgSaT9RaEPVgKrPKsYRKcgpTYN03OA/j1lpJCjb3zfHKyDWKiViSAsEnKKrWTdLivbGBSJdzemf5NhoT6arEVQubcNy+xD8sJe0Fd39hYY7ET4ZK3M8JCzKTU4rBYiaSJAV7JFQ2ayO7vs6MI/pHc456gXr/AbGmShtfX1+8vT0rzqKhwOIQ94MP9Bm4EjVmoTr1ffjqpcGuQrCPcGq6TW6h3wp7U/2SdXrhr2AfYKZwA6R/9Us+f3wEAyR4clxCGdycV/wfSrzQo89CAb41m/b4cFcnVIoTJIWUw/0ZIgBQI5TyLWlUqWSvP9iAh03Exjb7YVhi3bw+H/f4tT/WiEkSk7HHyZccdGYKIfLs/HLa8AfkkXkV7Ah16oDMlUAA6QRa1g4FxVxv3cl9PJBY18hxIqOvzZww411vpP8WiMbonygewTRJ3ex6vSQOjTFvhvj2gW4oKIMYk7kj94Fu8ozq5GodZSNVJPCstqcNxVibEDxOjW62w4vHhiJXO7+W/04cSU6Y0jbLMUc5MJqFeuEba///KZMKEXoXXS/ADp+JKnJMmGGkC+JO4aDg6yR5RpjiNODmqE5ZAxhdiLN2L8AOn4vSiBv8a3DrRSNdp7oUAinq38Z/Gfxr/eTUfSmwpfuER+81+0UajtT4aYYytUjfXRCMRmWiUnKKdLaDQKiSQeLd26pzPseVVmW3bs0QAvyZzs1Ho7Syad7PWuL+Z+gN9NNo/uNm3m41xVIKoopGITDRKTOHOFmAbiDZv31IN1TmX/vrY8rzI1l/DpJsx+GaKDm+C1rHlPvJ2TlWwVk/I7dPpdKrAm581RY+f3u4AtfGGbc3n9f2GbZkRd7dPp2XV2vT0toz+WoU6zzLverzNb11/K2DV5MHoaPLWudFvOxqHoJJGGvX9PRN0bumj0S0Jt/oc45LEqI+zDbwOf/i6oe/7Ir27Xgu8W36dlxFp8W8OIUTr9zCwKhb05hAqJpKGCR0GiUiWTVyKvjmEfEwd79ZVnfOWoIIbeMEkdFwVGcHl2hRpg9ll7OAvphMa3aCHTpvNMIhmIdOoZa8RjW75EPi6FFHAcwttomzVVZ0zgiy6LYDAPIb1bl1+o9WoZOBjg6HdHxUUqpQQoIvj1mQquVCTURZxqd/MCtEOAQ+TarfOmYfGxbutbVmdhSrlIEk+GtGlEoWPtkSgGuJb0UsIw2EBkY6Tr4xFJuhQm7siagzPArb5wMQLugp1XgqlGtcMwUi1FoVkhkg0rSmCrYFe+mGgB+HpZCRmOcSlPmVFaJE4mbOCWe3VORYWWL/MKQSlwIwQ3RSZ7vCUYJNes8tzUZXFlusj02WKCntZrdEeZI0rbPgjF+YQl+qdUghVJnJl8DI9hnqrczMNWGuIxkc3UpCQGrBG++4ywKACE41LeyrdCqKKEQVYNLqcIJgVUqjiKcIMFZ86nURH/arUO7S1KTgDVdoMw7CpmjEzB5JuuFRziEvjqRgtLWhtKcYLkikxEr1ZvdU5ediuiAV1oYpfb3Scf8CMaQDR+BC5xqVmdkpZUszQ5ocoRrNarHNdpmK9JjddTwBT5U6fnML92BQ6ZhGX4u4pRjd4jlN9Kai12q9zix2Ya2A9NAVqTF1O2kXuaZlpv0c9edUix2eFnLuCx8WY1R7jUQMZfrBu6dOC4a1+hSYvthpmGk/E+hwTsLNHV0NGcWnskmEoa17Ay1eVLPFtGKzQOq91tKqe5yuUdHJZ460I+AdFCSi0zgvrlDzBqDrF1Xrn+b4Xy5sXzBLOEC9nbI3/NP7T+E/jP43/NP7T+E/jP43/NP7T+E/jP43/NP7T+E/jP43/NP7T+E/jPy9asgYA)

有关此 pipeline 中使用的插件的信息，请参阅 [Pipeline 流程](https://docs.qualcomm.com/doc/80-70017-50SC/topic/camera-transform-downscale-and-rotate-encode.html#camera-transform-downscale-and-rotate-encode__section_uk5_f5k_bdc)。

## 运行应用程序

1. 确保您已完成[前提条件](https://docs.qualcomm.com/doc/80-70017-50SC/topic/python-sample-applications.html#python-sample-applications__section_gm5_s5j_bdc)。
2. 在目标设备上运行转换脚本：

        python3 /usr/bin/gst-camera-rotate-downscale-file.pyCopy to clipboard

如需显示可用的帮助选项，可运行以下命令：

python3 gst-camera-rotate-downscale-file.py --helpCopy to clipboard

## 预期输出

输出保存到位于 /opt/data/test.mp4 的文件中。

## Pipeline 流程

下表列出了用于运行转换 pipeline 的插件：| 插件 | 说明 |
| --- | --- |
| [qtiqmmfsrc](https://docs.qualcomm.com/doc/80-70017-50SC/topic/qtiqmmfsrc.html) | 采集视频流。 |
| [qtivtransform](https://docs.qualcomm.com/doc/80-70017-50SC/topic/qtivtransform.html) | 转换视频流。 |
| [v4l2h264enc](https://docs.qualcomm.com/doc/80-70017-50SC/topic/v4l2h264enc.html) | 编码 H.264 视频。 |
| h264parse | 渲染编码的 H.264 视频流。 |
| mp4mux | 将流多路传输至 MP4 容器中。 |
| filesink | 将视频数据写入文件。 |

**上一级主题：** [Python 应用程序](https://docs.qualcomm.com/doc/80-70017-50SC/topic/python-sample-applications.html)

**相关概念**  

- [视频转换](https://docs.qualcomm.com/doc/80-70017-50SC/topic/gst-transform-example.html)

Last Published: Nov 11, 2025

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